I was onto rx7store.net and gave them my requirements. Target goal of 600rwhp and they suggested the GT40R and V-Mount Intercooler.
I\'m aware I will need to uprate the injectors, fuel pump, ecu and rebuild the engine with porting but is this kit being optimistic for my goal ?
Any advice will be greatly appreciated as i don\'t want to waste thousands of euro\'s... Spec\'s :
GT40R Ball Bearing Turbo
Stainless Manifold
Tial 44mm Wastegate
Stainless Downpipe
All lines and fittings
Turbine
-Wheel: 77mm w/ 78trim
-Housing: .95 ar, 1.06 ar
-Maps: Not Available
Compressor
-Wheel: 88mm w/ 52 trim
-Housing: .58 ar
(http://www.rx7store.net/v/vspfiles/photos/Gt40R%20Kit-2.jpg)
(http://www.turbobygarrett.com/turbobygarrett/images/catalog/Turbochargers/gt40_images/Comp_large.gif)
V mount Intercooler
Modified Koyo Radiator
Polished Intercooler Piping
Couplers and Clamps
Mounting Hardware
(http://www.rx7store.net/v/vspfiles/photos/Vmount%20Intercooler-2.jpg)
(http://www.rx7store.net/v/vspfiles/photos/Vmount%20Radiator-2.jpg)
Cheers,
Brendan
What are you attempting to build,drag or track/street?:wave
Street car that will attend the odd meet and show...
600RWBHP is a bit extreme for a road going RX mate, bearing in mind that a 400RWBHP RX will probably keep up with a 550 bhp skyline or supra.
Not sure about the GT40R but my old GT35R made just under 400RWBHP.
Americans power estimates or even dyno readings for cars/setups are usually a bit optamistic too!
Look at the GT42R from A-spec. Doesn\'t use a T style foot print. It also has to be made for a RHD car specific. LHD kits will not fit. A-spec make RHD kits too.
Shaun
Thanks Lum. The more info the better. Why would a 400rwhp keep up with a 550bhp skyline / supra. Weight ? Or just that the rotary would rev quicker ? (Please excuse my ignorance/ lack of knowledge)
To be honest the car will only see the light of day a couple of times a year. Its not my only project car at the moment.
@ Shaun : So i\'d need to go bigger again ?:Hammer
Yeah the RX is a fair bit lighter than the others mate.
I think you need to be looking at a T51 or a T88 to make 600BHP, probably on a bridge ported engine i\'d think!
They only weigh 1250kg, the supra and skline are about 1600kg. Makes a big difference. Plus the way the power comes on with a rotor is very different.
The GT42R has done 730bhp on EarnieT\'s bridgeported Rx7 in america. You should get the 600 your after over here with some serious porting too.
The other big problem with power like that is most stuff isn\'t strong enough to properly cope too. The gear box, diff, axles, and countless other stuff will break under that kind of load.
Is it just pub talk, a good A-spec GT35R 500 is supposed to be a very good turbo that is guarenteed to 500bhp at the wheels on an america dyno, possibly more like 400-450 over here.
Shaun
@ Lum : I was looking at a T04Z before on nengun and it works out at €3,723.08 or £2852.22. Myself and a few other lads are flying Carl from Hayward Rotary over to Ireland to map our 7\'s next month hence the rush to find the right kit.
@ Shaun : I\'d rather have real figures than pub figures from my car. 500rhwp in the real world would suit me alot better that 600 pub talk ;) Is bridge porting very severe on the engine ?
Are you going to map on the Dyno? if you are let us know your results and post the charts love to see a rotary dyno at 600rwhp on this side of the pond.
You will need a big ported engine and lots of boost eg 1.6 BAR
If you are serious to get hit 600rwhp then you will need to go GT42R or T51R turbo kit.
The most you will get out of a T04z is 500rwhp may be a little more if you use race fuel.
We were going to have the cars mapped on the road but i might seek permission from our local university to use their RR. I know a friend of mine is using it on a development program at the moment.
600rwhp sounds a bit much for me and i\'m not embarrassed to admit it so I\'ll aim to hit 600bhp at the flywheel instead. Should be an easier goal. I\'ve an easy supply of VP Racing Fuel as well so that might help too :D
yep plus on the Dyno you can see if there is problems with ignition,restrictions etc
Plus no chance of crashing the thing on a 4th gear pull lol
Have you ridden in a true 400rwhp rx7 yet? as quick as a 500rwhp Skyline or Supra probably quicker actually, Colin Chapman 101 weight is everything :D
I\'ve been in a few high hp cars but never a high hp rotary. I think i\'ll stick with my original choice and just try to get the most out of it ! Hopefully with porting and a few other bits i\'ll hit the 600bhp mark @ the fly.
I\'m just waiting on my Membership to be approved and i\'ll post up a project thread with all the pic\'s of the build, if ya fancy a look, here is the car from when it was bought in japan to how it sits now. Select 30 images per page or you\'ll be there all night LoL :D
http://kruizer.8um.net/categories.php?cat_id=4
yep the guys are right....gt40 aint gonna cut it..........gt42 t51 will with enough boost oh and you will need to bridge it i think.
and seriously....if yiur looking at 500rwhp please map it on a dyno.......you will run out of road!!!
Cheers Ed. Do you believe the 600bhp or 500wrhp is attainable with the above set up ?
Quote from: KruizerCheers Ed. Do you believe the 600bhp or 500wrhp is attainable with the above set up ?
You can make 500rwhp on a T51 or GT42 with a very big non-bridged side ported motor. However, I can probably count on the fingers of one hand the number of RX7s in the UK that genuinely make that power.
I\'d honestly seriously suggest that you drive a 400rwhp RX7 before thinking about trying to push for 600hp. The costs involved in getting to 600hp for more than a couple of minutes between rebuilds is vastly different to a 400hp setup. And I said, there are very few people (tuners) in the UK that have built anything close to making that power.
Oh, and if you are even remotely contemplating trying to power map high hp cars on the road you need your head read. Its irresponsible, sooner or later this will be proven very much for the worse I fear. Fine tuning on the road after dyno time is one thing, pulling 1.6bar on the road on and off for a couple of hours while doing a complete map is going to end in a custodial at best if you\'re caught!
Good luck with it, let us have some graphs from your weekend :)
Cheers for the info. I doubt very much Carl would map for that power on the road hence why i\'ll be looking for a RR for one of the days ;)
nothing else to say than what everyone has already said, get yourself a ride in a 400rwhp rotary and i think you\'ll be quite suprised
colum
Is it a Roller Dyno or Hub Dyno. Seen this kind of power off a Cossie on rollers and they had over 10 people in the car trying to get it to stay on the rollers. That was 620bhp at the wheels with NOS !
You would need some serious porting too !
Shaun
Quote from: shaunwilIs it a Roller Dyno or Hub Dyno. Seen this kind of power off a Cossie on rollers and they had over 10 people in the car trying to get it to stay on the rollers.
Decent chassis dynos are designed such now that the harder the car pulls the more its pushed into the roller. People sitting in boots is not necessary! Look at the dyno comps they have in Aus, they manage to put down 1500hp without ppl hanging on to the rear end of it :yes
Looking at the boost map peak performance for that gt40r is at approx 2.2bar which is probably where they get there 600rwhp figure from.
........................
Quote from: TimmyLooking at the boost map peak performance for that gt40r is at approx 2.2bar which is probably where they get there 600rwhp figure from.
The y axis on the compressor map indicates the pressure ratio, NOT the gauge pressure...
They get 600 rwhp from using a Dynojet.
I\'m definitely happy i bought the online membership now. Thanks everyone, your a great help to a fish out of water...
Quote from: 20B_boyThe y axis on the compressor map indicates the pressure ratio, NOT the gauge pressure...
They get 600 rwhp from using a Dynojet.
yep rich is spot on....seriously...forget US poewr claims...you wont see those figures over here!!!
Quote from: KruizerCheers Ed. Do you believe the 600bhp or 500wrhp is attainable with the above set up ?
witha gt40 88 with enough boost and race gas i would say yes....oh and a bridge port would be needed.
Witha t51 or gt42 you could do it on a BIG street port IMO
@ Ed : What would you suggest is my best option ? I want to stick with the above but maximize the performance of the car... What would be a realistic goal with porting etc ?
Quote from: Kruizer@ Lum : I was looking at a T04Z before on nengun and it works out at â,¬3,723.08 or £2852.22. Myself and a few other lads are flying Carl from Hayward Rotary over to Ireland to map our 7\'s next month hence the rush to find the right kit.
That seems pretty steep to me mate! Is that for a HKS T04Z? and is it the full turbo kit or just the turbo itself?
I\'ve got a T04Z myself, it\'s a garrett one however not the HKS one and cost less than half that!
Quote from: Ed_RX7yep rich is spot on....seriously...forget US poewr claims...you wont see those figures over here!!!
Not yet you havent,but with the development going on at the likes of dragon,you will definately see alot more 600+rwhp cars soon.Chris impey,myself and gary gooding all have well in excess of 600rwhp,such power is relatively useless in our climate,try driving with over 2 bar boost on our roads-not for the faint hearted.
KRUISER-stick with the gt40r v mount set up with the right fuelling and ignition mods it will prove an awesome allround vehicle.:wave
@ Lum : Thats for the kit using a Garrett T04Z kit.
@ Silerrexman : Cheers dude, I hope to be hitting 500rwhp and that will be ample for what i want.
Quote from: silverrexmanChris impey,myself and gary gooding all have well in excess of 600rwhp,
Oh really :D Thats where all those 145+mph terminals are coming from!
^^^ I\'m Lost LoL :D (Wouldn\'t be the first time thou)
Quote from: 20B_boyOh really :D Thats where all those 145+mph terminals are coming from!
When i can drive mine expect 150mph plus terminals(might take awhile though-2010 is looking good),chris has already done a 147,garys engine made in excess of 650rwhp in oz.Come along with james to the fastshow, hopefully weather dependant we might see some 145 terminals(if i cant do it, i am going to strap ross in, with a brick attached to the accelerator):Thumbsup!
Quote from: Kruizer@ Ed : What would you suggest is my best option ? I want to stick with the above but maximize the performance of the car... What would be a realistic goal with porting etc ?
if you wanna stay strretported with boost of say 1.2-1.3 bar i would say the 4088 will get you about 430-450ish rwhp.....go bridge youll be closer to 500rwhp.
Is the GT40R not the bigger out of the two ?
By the way, thank you all for your patience !
Brendan
which two you on about bud?....its not bigger than the gt42 or the t51....gt40r is a bit bigger than a gt35r
Between the GT4088 and the GT40R as these are listed as two different kits on rx7store.net ?
Quote from: KruizerBetween the GT4088 and the GT40R as these are listed as two different kits on rx7store.net ?
One is journal bearing, one is ball bearing,the latter is a better turbo,should cost alot more,
Turbochargers > GT40 Family >GT4088 - 703457- 2
* Journal bearing turbocharger
* Oil-cooled bearing system
* High Load Capacity GT Journal Bearing System
* High performance BCI-18 compressor and UHP turbine
* 6-bolt turbine outlet flange
* T4 (International-style) turbine inlet flange
Turbochargers >GT40 Family > GT4088R - 751470-2
* High Performance C117 Compressor and UHP Turbine
* Brings GT Ball Bearing performance to the 700Hp class
* V-band turbine outlet flange
* T4 Turbine Inlet Flange
:Thumbsup!
Need to make sure the manifold is designed to utalise the twin-scroll of the turbo, otherwise it wont be as efficient as capable of.
Going to save up a few more bucks and get the HKS T51 of rx7store.net
Thanks to everyone for the information and help. Hopefully the car will prove worthy of your time:god
good choice if you want to get to your 600 target, plus the T51R V band exhaust manifold and rear compressor housing is a unique design which has good flow characteristics rather then the traditional T4 type square flange footprint.
Make sure the porting of your engine is big enough to spool that sucker properly
No point in cutting corners for the sake of a grand... I\'d only be kicking myself down the road.
Quote from: 20B_boyOh, and if you are even remotely contemplating trying to power map high hp cars on the road you need your head read. Its irresponsible, sooner or later this will be proven very much for the worse I fear. Fine tuning on the road after dyno time is one thing, pulling 1.6bar on the road on and off for a couple of hours while doing a complete map is going to end in a custodial at best if you\'re caught!
Fag:3gears-lh :3gears-lh
Ooookkkkk then....
Whos gonna map this crazy beast!
I think Kruzier and some of his friends are getting Carl flown over to map a few FDs in one go.
Ya thats the plan for the time being but i\'d say my car won\'t be ready but i might have my second rx7 ready to map for then. Just have to pick it up from Gary\'s and drop in an engine. Going to rebuild it myself as it\'ll only be used for drifting on weekends for fun...
Quote from: BlitzBoyI think Kruzier and some of his friends are getting Carl flown over to map a few FDs in one go.
What do you think of that Blitzen?
Carl was flown over already by one of his customers to map 7 cars and they sang his praises. Not being disrespectful to any of the tuner\'s in the uk. I admire all your demo cars.
Quote from: DRAGONWhat do you think of that Blitzen?
impressive, look forward in seeing these mapped cars on the strip putting down some good times.
Thanks i think....
Quote from: DRAGONFag:3gears-lh :3gears-lh
Hey, even Dr Jay knows to use a dyno when it gets scary!
I know some one doing severalyears custodial as the result of similar such antics. You wont be calling anyone a fag after you\'ve been sent down and the brothers have gotten medieval on your arse for 18 months, pretty boy! ;-)
Dr Jay? He doesn\'t exist anymore does he? I remember a good guy from a few years back called Jason, i used to do a lot of work with him, he had some great knowledge and enthusiasm but not sure what happened to him, I think he lost his way and never really came back, shame really.
Cool, a history lesson an all. This is one strange forum. Anyways at least this thread will be useful for anyone researching GT40R\'s...
Quote from: DRAGONDr Jay? He doesn\'t exist anymore does he? I remember a good guy from a few years back called Jason, i used to do a lot of work with him, he had some great knowledge and enthusiasm but not sure what happened to him, I think he lost his way and never really came back, shame really.
last time I saw him he was in a galaxy far far away Master tuner Yoda Jay :rollin