GT35 on the standard top mount will be interesting. Be also interested in knowing your charge temps etc, may struggle a little. What boost are you planning on running?

Tony.

 

If your spending the money that you are i think you would be better fitting a front mount no question about it.

R.B

 

The boost will be 1.4bar.The problem is I can not afford the front mount until the end of the year.

martin

 

If it is a bolt on style GT3x turbo, then it should be good for up to 100 BHP more than that figure on Optimax - if your engine was up to it, which is not a proven reliable option on a standard P1 engine. However, I would expect on the standard 2.0 P1 engine that things will be quite efficient at lower boost even if the turbo is overkill for that power level. If you only have to run 1.3 bar to make that power for example, then the charge temperatures may be lower than the original turbo running 1.3 bar. Whether you will have a wide power band with a turbo that size on a 2.0 is a matter of preference. I have something similar on a 2.5 and it is borderline on that to be honest.

But RCM and BRD know what they are doing and will extract the best out of any setup specified I am sure. Maybe you need to be aware of what the power band will be like and drive a 2.0 with this turbo before deciding though?

For that power level might an Ecutek reflash £500 through group buy, and an 18G turbo be about half the price of just the MoTeC though, leaving you spare to spend on exhaust manifold and at least an STI new age TMIC and giving you a better power band?

If you are later building a monster that will make use of the bigger turbo then it makes sense to buy once and buy of the right spec now. However, if you are having to save just to buy a FMIC, I doubt you will want the running costs of a GT35 monster.

 

The turbo is a GT35 P18 hybrid which is good for up to 410 BHP on optimax.RCM said this turbo has the least lag.RCM say the intercooler will be ok just a bit worried about the summer

martin

 

Knowing your boost is only 1.4 bar i'd agree with John about the charge temps. Shouldn't be a big problem to be honest, what sort of cfm can the GT35 flow at 1.4 bar tho. Wouldn't want to blow the TMIC apart (joke ).

But why have a GT35 on a 2.0, do you plan increasing the capacity at some point? If not the turbo is an 'interesting' choice. What are you ultimate goals?

Tony.

 

Just to add.I use the car at weekend only.I will hope the engine will last a couple of years as then i will be able to afford a full re-build so i can turn the power up to over 400 BHP all steal monster
martin

 

OK, I have something a bit similar from Ion with a P20 back end. Given that you have an 8000 RPM + limit with gearing and P1 cams to match it could be quite nice, but I'd suggest a drive of a car with this turbo and a TD05H-20G (which can be setup without surge now on a 2.0 to run 380-400 BHP on Optimax) to see what you prefer, I know which I prefer hence my suggestion to try them to see what you think, although opinions differ widely. If it was a "real" GT35 in its original housings, I think you'd be wanting a big cube engine to spool it up for road use as it is typically a 600 BHP turbo.

With MoTeC given that your car has an inlet air temperature sensor, the fuelling, timing and boost can be compensated for temperature to allow it to run safe settings. Just getting into playing with a MoTeC that P20SPD has loaned to me It is very hot, but not a budget choice.

Direct your questions to RCM, and do get a drive in some examples to know what you're letting yourself in for...

A standard P1 engine may well last a few years at 400 BHP anyway if only used at the weekends. Although RCM will recommend a rebuild because they wisely over-engineer things. It depends on what risks:costs you want to consider. If not your daily transport, a lot risk it, and will use octane booster more liberally to get more out of it... eg 400 BHP should be easy on a TD05H-20G that costs £800 with a good dash of NF octane booster. Best results on it are up to 40 BHP above that.

 

I managed a pathetic 355bhp 298ft/lbs from my P1 yesterday!

Car has standard internals, but with alot of bolt on mods.
Gruppe-S Headers/HKS Hiper/De-cat pipe/TMI141S Turbo/740's/HyperflowFMIC/Induction in a custom airbox/Ecutek mapped by BRD.

Car holds 1.45bar on the road (in fact I have suffered a little 'creep' at the top end before) but yesterday @ Power Engineering it only made a peak of 1.3bar!

I have the run recorded on my Defi's. Gutted, as the spec should allow for something In the region of 370+ with around 330ft/lb I would have thought!??

Car flies on the road, but am disappointed I can't back that up with the figures some are getting in this spec of tune.

** must add, after having spin in Fangoria's car, I am tempted by one of BRD/RCM's Garret Hybrids! Nice turbo **

 

Sorry,who are RCM?

 

Roger Clark Motorsport.

Tony.

 

Thanks