stuka
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RE: 92 MR2 Hard Top GTS Turbo
2010/08/22 20:06:38
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quote:
Originally posted by kameleon
thing with this engine is its using a turbo thats considered small/mid range on a 2l, yet its on a 2.2l with a far better ve than standard.
i think Jays 3071 was making 270ish on his 2.2l back in the day????
regardless it must be a damn punchy setup.
yes its very punchy, love it. I didnt know jay had a 3071 before. I spent the whole weekend putting the interior back together, carpets, gauge cluster and all the trim. had to cut holes in the carpet for the seats/harnesses and holes in the trim for the harness bar. came out pretty okay though, didnt have to hack things too much!
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mjbro10
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RE: 92 MR2 Hard Top GTS Turbo
2010/08/22 20:15:59
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Bloody awesome Pat!! I'm so glad it's finally where it should be for you. It must be a hell of a rush:-) I'll be back in Melbourne at the end of next month if you're around for a spin?
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MR2QIK
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RE: 92 MR2 Hard Top GTS Turbo
2010/08/23 09:43:38
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Kickasss result dude. Congrats on having it all sorted!
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stuka
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RE: 92 MR2 Hard Top GTS Turbo
2010/08/23 18:29:34
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quote:
Originally posted by mjbro10
Bloody awesome Pat!! I'm so glad it's finally where it should be for you. It must be a hell of a rush:-) I'll be back in Melbourne at the end of next month if you're around for a spin?
thanks Matt and welcome back, Im in Hobart these days so a spin would be difficult! quote:
Originally posted by MR2QIK
Kickasss result dude. Congrats on having it all sorted!
all sorted, now need to attend to all the other stuff I have neglected these last few months, so much to do yet
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stuka
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RE: 92 MR2 Hard Top GTS Turbo
2010/08/24 19:57:34
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mr2ns
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RE: 92 MR2 Hard Top GTS Turbo
2010/08/25 14:40:16
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i wish my dyno looked like that.
Good job.
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MR2QIK
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RE: 92 MR2 Hard Top GTS Turbo
2010/08/25 14:57:32
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Is that the correct dyno sheet? I'm having trouble reading the peak, but it looks like 268.8rwkw, yet the curve goes over 270.
AFR looks better. But what the hek happened uptop? Looks like she suddenly fell off & snapped back on again only to back off before she peaked....
Boost is still kinda high @ approx 23psi. Certainly an improvement over your first few plots. I suspect this dyno graph wasn't from a clean pull.
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stuka
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RE: 92 MR2 Hard Top GTS Turbo
2010/08/25 21:06:17
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lol sorry its a bit confusing. the tuner had the top of his screen maxed at 250kw while he was tuning. when he passed this, obviously he couldnt see what was going on so he backed off momentarily (at 268 kw), and then got back on the gas and took it to to 286 kw.
I think Im comfortable with the boost level for now, CR is 8.3:1. what do you reckon Jay?
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MR2QIK
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RE: 92 MR2 Hard Top GTS Turbo
2010/08/26 11:22:45
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Fair enough, that makes sense. As long as you're not pounding on it @ 23psi everyday, it should be alright. Personally, I very rarely even go for 20psi. 18psi (my lower preset) is more than enough for me & gives me the confidence to abuse it without fear of a catastrophic failure. I'd pretty much suggest the same for you. Save the higher preset for when you see an R35 GTR or something  LOL
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Mrskylighter
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RE: 92 MR2 Hard Top GTS Turbo
2010/08/26 11:55:28
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^Totally agree with what Jay said. I have mine turned down to 18psi from 22. Safer for the motor and less likely loose traction and crash hahaha
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nuk1ear
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RE: 92 MR2 Hard Top GTS Turbo
2010/08/26 15:28:32
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got any pics of that bracket you made for the intercooler? i have the same core and want to mount it in the same place haha
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-Totenkopf-
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RE: 92 MR2 Hard Top GTS Turbo
2010/08/26 18:19:11
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This is my personal opinion on boost. Normal combustion pressures are never going to break you motor, whether your running 10psi, or 30psi. Engine wear between these two boost levels will be negligible. What is important is the knock threshold of the engine and setup. Different engines with different modifications, running different fuels, intercooling, etc etc etc will all encounter knock at different boost levels.
If your tuner is 100% certain that you are not approaching this threshold at the boost you are running, then cool, go ahead and run it. If its tuned on the ragged edge to get a nice power number, then yes, its probably a very wise idea to back it back a little.
I don't know about you, but I know for sure my car FELT faster (and probably was at road legal speeds) on 16psi of boost, as opposed to 22psi.
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stuka
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RE: 92 MR2 Hard Top GTS Turbo
2010/08/26 20:49:06
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thanks for all the advice. James I have always been pretty firm with the tuner that I wanted to err on the conservative side. he monitored for knock always and backed off on the timing 2 degrees from where he was comfortable with after taking into account what I said.
I also thought making this power lower in the rev range might allow me more boost but this where I have no knowledge really. interesting what you said about your car feeling faster at 16 psi rather than 22psi. what do you think is the explanation for that? I havent had mine back long enough to compare my own experiences.
I dont have any photos of the intercooler bracket.
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robk
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RE: 92 MR2 Hard Top GTS Turbo
2010/08/26 21:00:55
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One factor that complicates things is the fact that you can achieve a higher boost level by having less ignition advance (because this leads to hotter exhaust gases which generate a faster flow of exhaust over the turbine), but of course you then lose some power by reducing the timing, so there is an optimal point (a combination of boost level and ignition timing) where you will have the best of both worlds. This is only a small part of the overall tuning process obviously, as you also have to consider knock levels etc.
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-Totenkopf-
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RE: 92 MR2 Hard Top GTS Turbo
2010/08/26 22:22:33
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quote:
Originally posted by stuka
thanks for all the advice. James I have always been pretty firm with the tuner that I wanted to err on the conservative side. he monitored for knock always and backed off on the timing 2 degrees from where he was comfortable with after taking into account what I said.
I also thought making this power lower in the rev range might allow me more boost but this where I have no knowledge really. interesting what you said about your car feeling faster at 16 psi rather than 22psi. what do you think is the explanation for that? I havent had mine back long enough to compare my own experiences.
I dont have any photos of the intercooler bracket.
Less wheelspin [88] Had serious problems getting first and second gears to hook up. I was only running RT615's. A chunky R-comp tyre wouldn't have gone astray. My tuner did the same thing, took a few degrees of timing out for 'safety margin'.
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