Anyone using a Garrett GT40R ?

[Kruizer]

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




V mount Intercooler
Modified Koyo Radiator
Polished Intercooler Piping
Couplers and Clamps  
Mounting Hardware




Cheers,
Brendan

[silverrexman]

What are you attempting to build,drag or track/street?:wave

[Kruizer]

Street car that will attend the odd meet and show...

[Lum]

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!

[shaunwil]

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

[Kruizer]

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

[Lum]

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!

[shaunwil]

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

[Kruizer]

@ 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 ?

[BlitzBoy]

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.

[Kruizer]

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

[BlitzBoy]

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

[Kruizer]

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

http://kruizer.8um.net/categories.php?cat_id=4

[Ed_RX7]

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!!!

[Kruizer]

Cheers Ed. Do you believe the 600bhp or 500wrhp is attainable with the above set up ?