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The mkiv Supra Owners Club

A little advise on a Celica GT4 - Dyno graph


JDukesy

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Hi all, so I dont have a supra anymore but I know there are a lot of people on here with lots of knowledge about the 3SGTE engines and tuning in general so I am hoping I might get some solid advise. Now the question I have relates to a celica GT4 (ST205) I am considering buying. However I am looking for a little advice, specifically on a dyno graph and claimed power figure as I am pretty sure the car I am lookin at should be making more power with the claimed spec IF the engine is healthy!

 

So the 'claimed' spec as fat as I know is:

Full decat exhaust

FMIC

Fensport stage 2 turbo

Panel filter

Boost controller set to 1bar

Blitz Access ECU (I think?)

Stock fuelling

 

Now dyno graph is below, made 211whp guestimated 280hp at the fly which to me having done a bit of reading sounds low? Hoping you guys can advise!

 

image

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The torque on that looks horrible, probably down to how the boost controller is setting it up. The Blitz Access ECU is OK, but it's more aggressive for Japanese 100RON, if I recall. But, you're freed up with extra RPM.

 

The chargecooler on the ST205 is pretty decent, I had one on my old MR2 and worked a charm (before I went mental on it). I'd see if someone can professionally set up that boost controller, or better still, have them dyno the car with it disabled so that you can see the true power before the gubbins interferes.

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Yeah the torque does look bad, have been doing a bit of reading and comparison to other GT4 graphs and I could only find one graph that looked similar but couldn't find any info as to the cause of the rubbish torque curve. I am hopping the garage who mapped it are going to call me back with a bit more info this afternoon so I shall see what comes of that.

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With 160k on the clock and those modifications I'd be looking elsewhere. ;)

 

I'd look for a relatively standard car that's not been messed with too much, the standard 255bhp import is a great car.

 

Yeah, I have been asking around on Celica club and gave Wallace Performance a call to ask a few questions and I think I am going to be giving it a miss. Especially seeing as I already have my s14a, I don't think I need another old, jap turbo car to look after right now, especially not one as potentially expensive as a modified GT4.

 

Just out of interest don't suppose you know the car do you?

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No, I don't recognise the GT4. There's a lovely 99 reg white one in Dyce that I pass regularly, must be one of the very last GT4's. I'd probably recognise your 200 if you bought it locally.

Owned both an ST205 GT4 and a S14A though. The 200 was a fun car(used mine for drifting before realising a SZ-R was a much more reliable drift car), but they have quite a few well known issues. Mine was a UK car and was suffering from rust as all the UK cars do, was glad I got rid and wouldn't consider another unless it was a fresh import silvia.

 

The GT4 on the other hand was a superb car and never let me down, didn't require anything other than regular maintenance no matter how hard it was driven. Was one of the best cars I've owned, used it all year round, great in the snow with the 50/50 split. Not a single thing went wrong with the car while I owned it over two and a half years. Possibly one of the reasons I drive a widetrack STI now. :)

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I do like the gt4's and I almost bought one a couple of years ago right before I bought my first supra! I do absolutely love my S14a though. It's been completely reliable up to this point and is very clean. My last one broke down within a day of buying it and then continued to do so pretty consistently. Here is my current one, recognise it? I have put the wheels / seats etc in it but

[ATTACH]205337[/ATTACH]

[ATTACH]205338[/ATTACH]

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