Mazda Rotary Club

General => Rotary and General Chit-Chat => Topic started by: re japi on November 21, 2020, 08:53:32 AM

Title: RX-7 vs RX-8 track time comparison
Post by: re japi on November 21, 2020, 08:53:32 AM
Hi

I was just wondering, can everyone who had timed their lap times, can put them on this thread that I can do compare them, just for fun.

Would be awesome to do cheet like:
Model, basic mods, track and time.


For example, Jon has timed his cars at Castle Combe. And I know many of you have too

Cheers

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Title: Re: RX-7 vs RX-8 track time comparison
Post by: boosted on November 21, 2020, 09:12:26 AM
Rx7 on twins 320bhp track set up so coilovers, brakes and tyres track bias. 1.18 best traffic free ideal conditions. Consistent 1.19 laps.
I know Liam Crilly and Anthony Weeks have done at least 1.19s consisently in race spec rx8s around Combe.

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Title: Re: RX-7 vs RX-8 track time comparison
Post by: Mr Spiller on November 21, 2020, 10:16:23 AM
I was running 1.19’s last  time out at castle Combe
Had a collapsed wheel bearing so hoping to reach at least 1.18 next time
Mine’s  on coil overs , stripped put car with half cage .
Mighty standard engine around 155 hp at wheels
Jon
What was the weary around Combe ?


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Title: Re: RX-7 vs RX-8 track time comparison
Post by: boosted on November 21, 2020, 10:18:34 AM
Weary? Ive been on nights feeling weary

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Title: Re: RX-7 vs RX-8 track time comparison
Post by: Mr Spiller on November 21, 2020, 10:19:55 AM
Weary?

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weary - my keyboard auto correct for westy


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Title: Re: RX-7 vs RX-8 track time comparison
Post by: boosted on November 21, 2020, 10:21:27 AM
1.15!!! 1 second away from project goal....fail lol but was fun.

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Title: Re: RX-7 vs RX-8 track time comparison
Post by: Mr Spiller on November 21, 2020, 10:25:10 AM
1.15!!! 1 second away from project goal....fail lol but was fun.

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I honestly don’t think you’d have got a lot more out of it


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Title: Re: RX-7 vs RX-8 track time comparison
Post by: boosted on November 21, 2020, 10:31:35 AM
Maybe 8j fronts with slicks negate the push understeer couldve drop into 1.14s..the back was planted on 9j slicks. Lets see what the Mighty Eunos can do next year. Im setting goal of 1.17s

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Title: Re: RX-7 vs RX-8 track time comparison
Post by: Mr Spiller on November 21, 2020, 12:54:01 PM
Maybe 8j fronts with slicks negate the push understeer couldve drop into 1.14s..the back was planted on 9j slicks. Lets see what the Mighty Eunos can do next year. Im setting goal of 1.17s

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Yeah
I think you will


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Title: Re: RX-7 vs RX-8 track time comparison
Post by: boosted on November 21, 2020, 02:03:37 PM
If its similar to rx7 ill be happy and provides some Sport for jdm cat n mouse me n Clive lol.
Sport for Clive to catch and pass...then let me passed rinse repeat lol. It hasnt got the punch up the straights but its pretty good /better in the corners and corner exit.

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Title: Re: RX-7 vs RX-8 track time comparison
Post by: re japi on November 23, 2020, 11:52:25 AM
Well, thats interesting. I thought that Seven would be much faster at Combe, maybe 3sec atleast

How about other tracks?

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Title: Re: RX-7 vs RX-8 track time comparison
Post by: boosted on November 23, 2020, 12:01:33 PM
Dont forget thats a well sorted very well driven Race or track Rx8 versus a mild tune 7. My 7 pretty much full interior tools etc and older rear suspension design.
At the Jdm days its flying by the normal rx8s. Wayne is a 1.19s boy and thats a well driven track rx8...with a bbk and slicks. Front splitter and rear wing. I think 1.19 is best of the best for an rx8 til you turbo charge it. Where as..looks at Steve Putt..1.08 in an rx7...ls7 engine. 285 slicks aero bgw..etc.
Its horses for courses

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Title: Re: RX-7 vs RX-8 track time comparison
Post by: Mr Spiller on November 23, 2020, 12:27:07 PM
I’d agree with you both
Aero has given me 1.5 seconds on a lap and I do try lol .
Just got to chase Jon to 1.17 now , it’s a tough circuit , have only driven it 5 maybe 6 times
I’d say equal spec RX7-RX8 at least 3 seconds


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Title: Re: RX-7 vs RX-8 track time comparison
Post by: Jamie R on November 23, 2020, 01:11:10 PM
Thats good improvement on aero mods, what have you done?

Title: Re: RX-7 vs RX-8 track time comparison
Post by: Mr Spiller on November 23, 2020, 03:53:21 PM
Thats good improvement on aero mods, what have you done?
Front splitter and BG wing
It is quite effective on faster circuits


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Title: Re: RX-7 vs RX-8 track time comparison
Post by: Jamie R on November 23, 2020, 04:43:50 PM
Thats good improvement on aero mods, what have you done?
Front splitter and BG wing
It is quite effective on faster circuits


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Nice one

Yeah should imagine the fast circuits suit it better

Get Jon to wire up a drs system lol


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Title: Re: RX-7 vs RX-8 track time comparison
Post by: boosted on November 23, 2020, 04:48:15 PM
Shhhh! Mine first...activated by engine vacuum or boost pressure

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Title: Re: RX-7 vs RX-8 track time comparison
Post by: Jamie R on November 23, 2020, 04:53:25 PM
I’ll have a sensor fitted to the seat so it’s activated every time I have a brown trouser moment lol


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Title: Re: RX-7 vs RX-8 track time comparison
Post by: Mr Spiller on November 23, 2020, 05:36:45 PM
3 inch butt hinges and a long string for me

I do wonder how much one of those rear wings cost from a F1 car


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Title: Re: RX-7 vs RX-8 track time comparison
Post by: Jamie R on November 23, 2020, 05:39:32 PM
More than my annual salary lol


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Title: Re: RX-7 vs RX-8 track time comparison
Post by: boosted on November 23, 2020, 06:03:13 PM
3 inch butt hinges and a long string for me

I do wonder how much one of those rear wings cost from a F1 car


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Use your knee like F1

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Title: Re: RX-7 vs RX-8 track time comparison
Post by: Mr Spiller on November 23, 2020, 06:51:20 PM
3 inch butt hinges and a long string for me

I do wonder how much one of those rear wings cost from a F1 car


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Use your knee like F1

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Do they ?


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Title: Re: RX-7 vs RX-8 track time comparison
Post by: Jamie R on November 23, 2020, 06:56:36 PM
3 inch butt hinges and a long string for me

I do wonder how much one of those rear wings cost from a F1 car


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Use your knee like F1

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Do they ?


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Don’t try it !!

Ya door may fling open lol


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Title: Re: RX-7 vs RX-8 track time comparison
Post by: re japi on November 24, 2020, 07:10:17 AM
Dont forget thats a well sorted very well driven Race or track Rx8 versus a mild tune 7. My 7 pretty much full interior tools etc and older rear suspension design.
At the Jdm days its flying by the normal rx8s. Wayne is a 1.19s boy and thats a well driven track rx8...with a bbk and slicks. Front splitter and rear wing. I think 1.19 is best of the best for an rx8 til you turbo charge it. Where as..looks at Steve Putt..1.08 in an rx7...ls7 engine. 285 slicks aero bgw..etc.
Its horses for courses

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Yes, true.

How much that 8 weights?

LS engine

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Title: Re: RX-7 vs RX-8 track time comparison
Post by: re japi on November 24, 2020, 07:10:43 AM
I’d agree with you both
Aero has given me 1.5 seconds on a lap and I do try lol .
Just got to chase Jon to 1.17 now , it’s a tough circuit , have only driven it 5 maybe 6 times
I’d say equal spec RX7-RX8 at least 3 seconds


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1,5 sec? Wow...

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Title: Re: RX-7 vs RX-8 track time comparison
Post by: Mr Spiller on November 24, 2020, 10:33:12 AM
I’d agree with you both
Aero has given me 1.5 seconds on a lap and I do try lol .
Just got to chase Jon to 1.17 now , it’s a tough circuit , have only driven it 5 maybe 6 times
I’d say equal spec RX7-RX8 at least 3 seconds


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1,5 sec? Wow...

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Yep I was surprised
Turn in and speed carried through corners is much better


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Title: Re: RX-7 vs RX-8 track time comparison
Post by: re japi on November 24, 2020, 10:33:58 AM
Damn, that really is alot, for minor mods basically

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Title: Re: RX-7 vs RX-8 track time comparison
Post by: Mr Spiller on November 24, 2020, 10:36:38 AM
Damn, that really is alot, for minor mods basically

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Front splitter was a lot of work
Just need a new trailer now as I’m struggling to load the car


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Title: Re: RX-7 vs RX-8 track time comparison
Post by: re japi on November 24, 2020, 10:38:48 AM
Damn, that really is alot, for minor mods basically

Lähetetty minun G8141 laitteesta Tapatalkilla
Front splitter was a lot of work
Just need a new trailer now as I’m struggling to load the car


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Title: Re: RX-7 vs RX-8 track time comparison
Post by: Mr Spiller on November 24, 2020, 10:39:55 AM
First attempt was a complete cock up (https://uploads.tapatalk-cdn.com/20201124/374c2b7fd05acb17519d8790bde50614.jpg)


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Title: Re: RX-7 vs RX-8 track time comparison
Post by: boosted on November 24, 2020, 10:53:51 AM
Im amazed your misses lets you work on the car in the kitchen

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Title: Re: RX-7 vs RX-8 track time comparison
Post by: Mr Spiller on November 24, 2020, 12:40:24 PM
Im amazed your misses lets you work on the car in the kitchen

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Nice breakfast  bar on the front


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Title: Re: RX-7 vs RX-8 track time comparison
Post by: Jamie R on November 24, 2020, 12:58:33 PM
First attempt was a complete cock up (https://uploads.tapatalk-cdn.com/20201124/374c2b7fd05acb17519d8790bde50614.jpg)


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No shame in that lol


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Title: Re: RX-7 vs RX-8 track time comparison
Post by: boosted on November 24, 2020, 01:00:14 PM
Im gonna make mine detachable. for loading and unloading purposes.

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Title: Re: RX-7 vs RX-8 track time comparison
Post by: Mr Spiller on November 24, 2020, 01:03:07 PM
Im gonna make mine detachable. for loading and unloading purposes.

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I thought of extending mine and making it detachable
Just need male and female channel runners for it to clip into
Jon
You’d need a pretty solid undertray to fix it to


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Title: Re: RX-7 vs RX-8 track time comparison
Post by: Mr Spiller on November 24, 2020, 01:03:46 PM
First attempt was a complete cock up (https://uploads.tapatalk-cdn.com/20201124/374c2b7fd05acb17519d8790bde50614.jpg)


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No shame in that lol


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I’m supposed to be a carpenter


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Title: Re: RX-7 vs RX-8 track time comparison
Post by: Jamie R on November 24, 2020, 01:04:24 PM
First attempt was a complete cock up (https://uploads.tapatalk-cdn.com/20201124/374c2b7fd05acb17519d8790bde50614.jpg)


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No shame in that lol


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I’m supposed to be a carpenter


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Which one ?

Karen or Richard ?


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Title: Re: RX-7 vs RX-8 track time comparison
Post by: Mr Spiller on November 24, 2020, 01:05:28 PM
First attempt was a complete cock up (https://uploads.tapatalk-cdn.com/20201124/374c2b7fd05acb17519d8790bde50614.jpg)


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No shame in that lol


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I’m supposed to be a carpenter


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Which one ?

Karen or Richard ?


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Jesus


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Title: Re: RX-7 vs RX-8 track time comparison
Post by: boosted on November 24, 2020, 01:06:27 PM
Im gonna make mine detachable. for loading and unloading purposes.

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I thought of extending mine and making it detachable
Just need male and female channel runners for it to clip into
Jon
You’d need a pretty solid undertray to fix it to


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Undertray done and it attaches to subframe ..got a splitter too but gonna extend it. I gotta take front bumper and undertray of so will add some stanchions down from the front chassis legs for support. How long did it take for your Wuhan wing to arrive...im still waiting for mine

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Title: Re: RX-7 vs RX-8 track time comparison
Post by: Jamie R on November 24, 2020, 01:06:32 PM
First attempt was a complete cock up (https://uploads.tapatalk-cdn.com/20201124/374c2b7fd05acb17519d8790bde50614.jpg)


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No shame in that lol


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I’m supposed to be a carpenter


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Which one ?

Karen or Richard ?


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Jesus


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Lol I thought Joseph was the carpenter mate ?


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Title: Re: RX-7 vs RX-8 track time comparison
Post by: Mr Spiller on November 24, 2020, 01:09:05 PM
Im gonna make mine detachable. for loading and unloading purposes.

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I thought of extending mine and making it detachable
Just need male and female channel runners for it to clip into
Jon
You’d need a pretty solid undertray to fix it to


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Undertray done and it attaches to subframe ..got a splitter too but gonna extend it. I gotta take front bumper and undertray of so will add some stanchions down from the front chassis legs for support. How long did it take for your Wuhan wing to arrive...im still waiting for mine

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I hung two from oil coolers on mine to hold corners and long bars from crash bar
I bought wing from lad on RX8OC .
It was fitted to a red boot too
Just needed strengthening


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Title: Re: RX-7 vs RX-8 track time comparison
Post by: Mr Spiller on November 24, 2020, 01:11:01 PM
First attempt was a complete cock up (https://uploads.tapatalk-cdn.com/20201124/374c2b7fd05acb17519d8790bde50614.jpg)


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No shame in that lol


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I’m supposed to be a carpenter


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Which one ?

Karen or Richard ?


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Jesus


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Lol I thought Joseph was the carpenter mate ?


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Johnny Cash


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Title: Re: RX-7 vs RX-8 track time comparison
Post by: boosted on November 24, 2020, 01:11:09 PM
Mines coming from China but uk seller...i was led to believe had in uk stock....

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Title: Re: RX-7 vs RX-8 track time comparison
Post by: Mr Spiller on November 24, 2020, 01:12:28 PM
Mines coming from China but uk seller...i was led to believe had in uk stock....

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E bay is a twa*
You only know it’s direct from China when it goes through PayPal


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Title: Re: RX-7 vs RX-8 track time comparison
Post by: boosted on November 24, 2020, 01:13:06 PM
Amazon too!

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Title: Re: RX-7 vs RX-8 track time comparison
Post by: MightyCondor on November 25, 2020, 06:32:01 PM
Fun thread. The only track I've driven both cars at is Snetterton. 2 dry days in an 8 with a best lap of 2.31. I did 2.25 on my 2nd session in the FD before play time was abruptly ended lol.  The long straights really favour a powerful car, even though the RX8 is more capable through the faster corners like Coram.

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Title: Re: RX-7 vs RX-8 track time comparison
Post by: boosted on November 25, 2020, 06:49:35 PM
I think it all comes down to the 8s superior suspension design at the rear....thats why an rew powered 8 is such a good idea.
Ive had some pretty epic rear end slides in my 7 exiting corners with just 320bhp part of the reason i never really wanted anymore

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Title: Re: RX-7 vs RX-8 track time comparison
Post by: Mr Spiller on November 25, 2020, 08:52:28 PM
I think it all comes down to the 8s superior suspension design at the rear....thats why an rew powered 8 is such a good idea.
Ive had some pretty epic rear end slides in my 7 exiting corners with just 320bhp part of the reason i never really wanted anymore

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Keep sliding brother
Good to see Alan’s comments
Sounds about right


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Title: Re: RX-7 vs RX-8 track time comparison
Post by: re japi on November 26, 2020, 06:35:47 AM
Fun thread. The only track I've driven both cars at is Snetterton. 2 dry days in an 8 with a best lap of 2.31. I did 2.25 on my 2nd session in the FD before play time was abruptly ended lol.  The long straights really favour a powerful car, even though the RX8 is more capable through the faster corners like Coram.

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Yeah, true. As far as I know, Snetterton favors powerfull cars...

What mods do you have in both of your cars?

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Title: Re: RX-7 vs RX-8 track time comparison
Post by: MightyCondor on November 26, 2020, 09:30:25 AM
Both former cars now. That RX8 had Cusco sway bars but otherwise stock. The FD was extensively modified and was on a EFR 8374 IWG turbo running about 1.1 bar so based on others with that turbo, I would estimate at least 450bhp.

On the Bentley straight the FD could hit 135mph, whereas the RX8 just tops 110mph.

I only managed a handful of laps in the FD, so there's room for improvement. Some of the other FD guys I've been there with have managed sub 2.20 laps.

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Title: Re: RX-7 vs RX-8 track time comparison
Post by: boosted on November 26, 2020, 09:38:14 AM
Are you building another for track? Ive retired mine...prob gonna put to roadspec looking for some standard seats.

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Title: Re: RX-7 vs RX-8 track time comparison
Post by: MightyCondor on November 26, 2020, 09:47:22 AM
The next car will have most of the same parts. I will probably do the odd track day, but it'll be more of a road car. I don't fancy crashing another one, so would be picky about which tracks to visit

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Title: Re: RX-7 vs RX-8 track time comparison
Post by: boosted on November 26, 2020, 09:51:57 AM
Yeah wise! My little tyre rub was a wake up call.

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Title: Re: RX-7 vs RX-8 track time comparison
Post by: re japi on November 26, 2020, 10:50:54 AM
Both former cars now. That RX8 had Cusco sway bars but otherwise stock. The FD was extensively modified and was on a EFR 8374 IWG turbo running about 1.1 bar so based on others with that turbo, I would estimate at least 450bhp.

On the Bentley straight the FD could hit 135mph, whereas the RX8 just tops 110mph.

I only managed a handful of laps in the FD, so there's room for improvement. Some of the other FD guys I've been there with have managed sub 2.20 laps.

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Oh, so there was big differense between those cars. Well, I quess that time lap differense tells that too

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Title: Re: RX-7 vs RX-8 track time comparison
Post by: Mr Spiller on November 26, 2020, 07:13:13 PM
Yeah wise! My little tyre rub was a wake up call.

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When we doing snettterton  then Mr B


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Title: Re: RX-7 vs RX-8 track time comparison
Post by: boosted on November 26, 2020, 07:43:51 PM
Next year fine by me.

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