Well time to start again i think(track car)

[787b]

cheers:Thumbs-up

[mattfduk]

i think i read mr webb was running 265s last year, maybe he will pop on to confirm.
 
Are you gonna do time attack this year again at oulton or just continue to do track days, what sort of times are you running around oulton last time you were on a trackday?

You cant get 265 R888\'s in 17\'s so it would either be 255 or 275 but I belive it was 255.
 
Not sure what I will do this year, I just want some fun really :3gears-lh

[turbotoaster]

you are right mate, my apologies, must have seen 265 elsewhere and got confused.

well whats the gearing like on yours with the rx8 box, short enough that you could do some hillclimbing/sprinting as id imagine the throttle response on yours would far outway any 13b turbo and bramble seemed to do reasonably well when he had a go with a t51r powered one

[mjwebb48]

Thought I pop in and mention a few things.

1st, you need full operating lights so you can show other drivers when your on your fast laps. its in the regs.

I ran 255 all round as the other matt said, tyres this year are pirelli(sp) to bring series in line with drifting I guess.

Ive been moved into either club pro or pro rwd which is one of the new groupings, if I turn out but its looking less and less likely

I dont think I was running 500 bhp or anywhere near more like 430-450 tops never dyno`d so cant confirm.

A full season as I mentioned on fduk, will hit the wallet hard if you maintain the car between rounds etc, also I ran car on race fuel as extra saftey measure and that adds alot, but I would rather do that than have rebuild issues, we built the car to be reliable so a lot of time and effort went into ducting of v mount etc and keeping engine bay as  heat free as possible. You would hope John would look at this closely with his background. I feel aero ect would be a fine tuning issue for me  as it cant produce down force in the pits!!

Mat

[turbotoaster]

thanks for the info matt about everything.

can you use any pirellis? what about people who have already bought there 888s, are they allowed to use them?

 if I turn out but its looking less and less likely............you thinking of not competing this year? i was looking forward to see how you do against the top club class 4wd guys.

i assumed with 1.15bar of boost on a t78 that 500bhp would be hit, i think i remember you saying that you ran 0.9bar sometimes though.

Do you have any pics of your v mount setup and maybe some ducting pics as that would be really interesting to see what sort of angles you have set things.

Should be an update on the car in the next couple of weeks so will keep everyone posted

[mjwebb48]

thanks for the info matt about everything.

can you use any pirellis? what about people who have already bought there 888s, are they allowed to use them?

 if I turn out but its looking less and less likely............you thinking of not competing this year? i was looking forward to see how you do against the top club class 4wd guys.

i assumed with 1.15bar of boost on a t78 that 500bhp would be hit, i think i remember you saying that you ran 0.9bar sometimes though.

Do you have any pics of your v mount setup and maybe some ducting pics as that would be really interesting to see what sort of angles you have set things.

Should be an update on the car in the next couple of weeks so will keep everyone posted

Im sure once your entered youll get info on tyres but I have had several emails about tyre sizes etc as the control tyre is now a perelli not sure which one though, I think the trofeo was mentioned,( shown at autosport show.?) Unfortunately due to results last year, club is not an option for me and they have split up the classes even further from what they where. I personaly think it should be club or pro no need to split it into rwd /fwd/4wd/fi/na. Just get back to the basics of the fastest car in there class. I dont have the budget to compete with pro rwd cars ie whifbitz who will spend in excess of 100k building a car, the guy with the sc exige has spent a fortune building that aswell and in testing was as fast as the planet racing evo at brands (sub 50 secs easily, which is mega quick) and jamie can pedal too.

You may see me at one or two rounds but def not full season.

Mat
 
 There are pics of the ducting up on here or fduk somewhere.

[turbotoaster]

from what i currently know, noone actually knows what pirellis the time attack is gonna be run on, i did look at the trofeo when i heard to news and they do seem like the most sensible choice, especially when you have cars up to 900bhp there, normal road tyres would be chewed to bits!

At the autosport show they were on p zeros which are basically just normal rubber hence the confusion and worry, since the trofeo is a new tyre i would imagine they will use them to market them out to the european market to enhance sales.

I would like to do oulton park since its my local circuit but since its first on the calender i dont think ill have enough time to get it finished due to all the fun ive had with my insurance claim etc.

Its a shame you got bumped up a class as the cars your competing with are to fast like you say to really give any competition with, but on the other hand youy were much faster than ronnie in his cosworth so its swing both ways.

I agree what your saying about all the classes, it is getting really daft now, i think it should be 3 classes, no more.

If your fwd and come 10th in club, well you can class yourself as the fastest fwd, not get put into a completely different class.

In club pro rwd there would only be 3-4 competing this year?....pretty much sticks you on the podium just for turning up sometimes!

You planning on just doing some random trackdays this year for fun then, be good later in the year if my cars ready to organise a big rotary track day with maybe some sneaky timing!

[Grant Monkhouse]

Any progress?

[turbotoaster]

little bit of progress, bought my intercooler and radiator again as they got damaged in the crash.

spoke to jon and hes got some more parts ready to be bolted on, steering rack, ARB setup,poly bushes etc, and hopefully will get the doors by the end of week, finish off the paint prep and we can get painting!!

Then its a case of just bolting everything on, i havent needed to use the car so there has been no rush, fingers crossed ill have some pics next week.

hows your car coming along?

[Grant Monkhouse]

Rx7 is being sold and the rx4 hasn\'t had much done as of late as I\'m waiting on some to be made. Picking them up this week. And got my own designed custom hubs to be made too.

Have got the turbo for the rx4 though, a BOrgWarner S300SX3. BW\'s answer to the GT4094R basically. Same HP numbers etc. And its cheaper.

BW have just brought out their new range of turbos too, something I\'m looking into for the future when I want to go really fast.

Have you seen them?

[turbotoaster]

ah shame to hear your getting rid of the rx7, so how come your staying with the rx4.....are you just building a drag car?

i know the BW range very well, good value for the money, i prefer the over the garrett range to be fair, but then thats down to preference.

which s300 did you go for as you know there quite a few different sizes.

ill be running a s400 because of its bigger shaft to help cope against high EGTs.

what fuel you gonna be running on, pump, race, e85, meth?

ive got a thread actually on rx7club you might like of a guy running your turbo on the dyno with some power figures if it helps.

your also talking about the EFR series turbos, been watching there progress for a few months and even though the pricing has been published, finding direct comparisons in terms of power had been hard to find.

Found one honda vtec graph and the results seem impressive, but saying that looking at the spec of these turbos you can understand why, hoping to hear about a rb26 power graph from full-race soon so we will see.

Would love to have one but looking at the pricing its a bit beyond my budget, ill be happy with my regular £500 s475

[Grant Monkhouse]

Yes the EFR range. What sort of information are you after on them? I could email John at AET Turbos and ask him if he has some information that you want?

What\'s your thread on Rx7 club? Iv just started going on there. Information overload or what! Seen some great builds.

The thing I find best about the EFR turbos is that you get everything in one package, no need to search for other bits. They even have a port for a turbine shaft speed sensor, reeally good for measuring another parameter for tuning capabilities.

[Grant Monkhouse]

The turbo I have is;
Part number 177281
Comp wheel OD 3.60
Comp wheel inducer dia. 2.60
Comp wheel inducer diameter (mm) 66
Turbine wheel OD 3.14
Turbine wheel exducer 2.89
Turbine wheel exducer (mm) 73
Turbine ar .88
Cartridge assembly 176634
Service kit 318393

Also has the extended tip technology. Giving the benefits of a bigger turbo without the draw backs of later spool etc

I got the spec sheet given when I bought the turbo.

Would have got an s400 but I will hopefully get boost with mine before 5,000rpm.

[turbotoaster]

Yes the EFR range. What sort of information are you after on them? I could email John at AET Turbos and ask him if he has some information that you want?

What\'s your thread on Rx7 club? Iv just started going on there. Information overload or what! Seen some great builds.

The thing I find best about the EFR turbos is that you get everything in one package, no need to search for other bits. They even have a port for a turbine shaft speed sensor, reeally good for measuring another parameter for tuning capabilities.

dont really need any information as such, just more power graphs would be nice, though being honest unless your really pushing for a certain power figure with a spool time that is important(like a race series/competition) then i dont think they are currently worth the extra expendature, not for a rotary at least.

You mention that yes they include alot of additional features but then running an internal wastegate on a rotary might not be the best thing due to the low boost a rotary runs and the extra flow that will be needed to pushed through the internal wastegate.

Sure for a piston engine they are fine, the larger rear wheels are perfect for pushing a piston but for us im not sure yet.

Yes you can go external turbine housing, but then all that puts you back to the start.

for motorsport, they are good, for us at there current price, im not 100% convinced, just like a gtx garrett, costs to much to be worth it.

but im looking forward to being proven wrong, plus as the price comes down then they will make more financial sense.

http://www.rx7club.com/showthread.php?t=903611

hes sticking aload of turbos on the dyno with graphs to give exact us a chance to see there differences in real world application.

The turbo I have is;
Part number 177281
Comp wheel OD 3.60
Comp wheel inducer dia. 2.60
Comp wheel inducer diameter (mm) 66
Turbine wheel OD 3.14
Turbine wheel exducer 2.89
Turbine wheel exducer (mm) 73
Turbine ar .88
Cartridge assembly 176634
Service kit 318393

Also has the extended tip technology. Giving the benefits of a bigger turbo without the draw backs of later spool etc

I got the spec sheet given when I bought the turbo.

Would have got an s400 but I will hopefully get boost with mine before 5,000rpm.

ah you have a s366 then, not bad turbo, good choice on going for the largest turbine wheel, but thought you would have gone for the 1.00ar/ turbine housing to keep the back pressure as low as possible.

Saying that it all depends on how hard your gonna push the turbo, whats the car gonna be used for?

you could have gone for a s400 and still maintained decent spool

seen one on a streetport hit 15psi at 4krpm with a small turbine housing.

[Grant Monkhouse]

Ha I just read that whole thread yesterday. Was gutted when I got to last pages and he hasn\'t really hit the dyno yet. Lmoa.

The largest turbine wheel is a .91 that I could get. I will play around with the Ars when I start really seeing what the engine/car is capable of.

With back pressure what I think I may do is have the down pipe at 3" then open out to to 3.5" to get rid of it, depends on room under the car.

The car is a drag car but I\'m going to drive it in the streets. The turbine housing I have got is a single scroll, see if I benefit from less friction/better flow through the turbo at higher rpm Than with a twin scroll looking for midrange spool.

I think you will understand what I\'m mean? Single scroll as opposed to twin scroll?

It\'s an ongoing argument just like bov or no bov. So I\'m going against the trend even though most people say other wise. I can always exchange the housings anyway and just adjust the map.