Hi Ray

You've got a VF30 in your JDM Sti7.
UK and Aus spec STi7/8 has VF35.

The VF30 has a bigger turbine housing I believe.

The XS kit has a thicker top mounted IC than the STi's (probably 60% thicker), this makes a big difference !!!Can run loads more advance up in the rev range and probably also more boost.

Sounds like you want a bigger turbo (e.g. APS SR40) and a front mount IC mate ;-).

I've already started thinking ahead with bigger injectors 650cc ;-)going in soon.

Pat, Pat, Pat your going to have get mapping !!!!

rupert

[Edited by GDBSTi - 7/5/2003 4:33:01 PM]

 

Hi guys,

How do these guys achieve this http://www.turboxs.com ?

The mods are similar to a catless zorst and ecutek remmap but they are achieving more hp than my JDM STI-7 ?

Is the IHI VF30 turbo they use that much better than the JDM STI-7 turbo (I think it is a IHI VF35 ???) ???

Cheers,
Ray

They are using a plug n' play ecu remmap and 98 ron gas in a hot climate similar to me but I only get about 255 - 265 WHP / 320 - 330 BHP on a STI ???? They get significantly more on a USA WRX ?

 

Ray,
I think the hoses in the US are a bit off

Skassa

 

Denmark,

I have heard that; however, these guys run 12.7's in the 1/4 mile with the turboxs stage 4 (I have seen lots of times slips to prove it) all day long on the standard USA WRX with stg 4 ! In my eyes that shows that the hp must be somewhat accurate.....I mean they are easily in the 12's with standard 5 speed USA WRX gearbox which is not as good for acceleration as the JDM STI-7 6 speed but I would probably struggle to run a 12.9 with my current setup. They must really be producing this power...imho

More thoughts ?

Cheers,
Ray

 

Oh, not to mention they are only running a peak of 17 psi boost; whereas I am running a peak of 19 - 20 psi ? The IHI VF30 turbo must be better than the standard JDM STI-7 turbo (IHI VF35 ??....if not then something is not adding up....same injectors, same fuel pump.....differences: zorst, but they have a full decat just like us, they use a UTEC piggy back ECU that keeps all stock cold start features etc etc....I would still imagine that the ECUTEK SS remap is better so how where are they getting this extra power from if it is not the turbo ? Are they running leaner and not safe ? but if so, why does everyone with a USA WRX usually go the Stage 4 route....must be somewhat safe ?

I need answers

Cheers,
Ray

 

We've given Absolute Shower similar power, but mapping to this level is definitely not "plug and play".

 

Hi Pete,

That is what I was thinking; however, if you read their web site the stage 4 is plug n' play and ONLY 17 PSI max boost !! I am just curious because the 1/4 mile times are unreal ...12.7's for a WRX gearbox ratios, WRX clutch and I think the USA cars are slightly heavier (bumper crumple zones or something) must mean these things are putting out some serious power....and these guys are getting these 1/4 mile times with the plug n' play.


Does anyone have an answer on the turbo question ?

Cheers,
Ray

PS: Pete, I am not complaining, I have a huge smile everytime I get in my ScoobySport / Ecutek, zorst and mapped JDM STI-7 . I am just curious how they are getting these 1/4 mile times and power from these mods they are doing.

 

bttt

 

Hi Ray

Those times can be achieved with a big turbo and loads of fuel, but I wonder what sacrifices are made to low/mid range driveability.

 

Had a conversation yesterday where one of my mechanics has done alot of work abroad and was talking about Australia.

Australians claimed they had got x amount of brake from a unit, it was shipped to the UK and achieved no where near the power in Australia.

This happened on a number of occasions, it was concluded that engines don't travel well and loose power in transit.....

Or some people don't tell the whole truth..........

 

Hey Rupert

This modding thing never seems to end

Keep us informed my friend. I think my next step (if I take it ) will be a new FMIC.....I am more worried about safety in these hot conditions than anything else....I figure if I can make my car a lot safer and possibly get a little more speed out of her with a FMIC then it will be worth the cost. We shall see, but it is a few months away

Cheers all for input....oh, and thanks Pete for posting your thoughts as well

Ray

 

When i bolt my TD05/06 turbo on my WRX UK300 i am looking at getting about 380bhp. This should be no problem for the turbo because its good for about 430bhp and my STI7 injectors are good for 400bhp. Its just how much stick i want to give the engine and gearbox to stop us achieving these figures so thats why i'm only looking for 380 max because thats about its limit

Scott

 

Scott,

Out of interest, what boost are you intending to run to achieve 380bhp?

Nito

 

Hi Nito

About 1.4bar i do believe, when we get mapping we shall see what its happy with i don't really know too much of the technical side just going by what people in the know tell me

Scott

 

Scott,

My STi 8 is running 1.35bar at 3300rpm, 1.25bar at 6000rpm and 1.1 bar at 7000rpm and it is running out of injector capacity (IDC = 93%), thats why I am going for 650cc's. I suppose it is fine to take a average road car to 95% IDC, but not a rally,racing car ;-). I am getting 340bhp with 1.25 bar at 6000rpm so I suppose 1.4 bar at 6000rpm will give you 380bhp, but I am sure your injectors will be running close to 100%IDC up there unless you fit a adjustable FPR.

rupert