I'm taking the car up to Tenn this weekend to run it. I expect it to achieve 120's at this point. I just stepped up to 305's from 275's so I hope this helps with the lack of traction in first and second gear. I am so close to my original goal of 100 whp over the stock setup than I am going for it in the name of science. LOL The costs of the turbine housing and/or the meth kit are drops in the bucket compared to what I have invested especially if I do the install and have IP only does the tune. It would be very interesting to me and other powerlab owners to see what the true Powerlab gt35r kit can do on pumped gas.

 

good luck, hopefully they have good track prep

 

If OP is putting down 520whp on his local DynoJet compared to this 360whp, I'd guess a lot higher than 120mph.
I thought Z's needed at least 400whp to trap 115+ Maybe that car is running lite.

 

I tested boost last night in third with gt3582R. It achieves full boost by 3200-3300 rpms on my built motor. If the 1.06only adds 300-400 rpms then I should see full boost by 3600 rpms.

I have seen the gt37r kit produce ~550 whp on pump gas but I wonder were it would run out of power?

 

Yeah, I was kind of amazed when I saw his car consistently trap between 114- 117 mph out at Firebird Raceway in Chandler, AZ. And he probably has made 30+ passes at those speeds, so it definitely wasn’t a fluke. That convinced me on what route to take with F/I, lol.

 

what's full boost? 20psi?

you made 520 on pump, so not worth going to a 37r for pump gas gains. You'd be well into race gas land trying to see the differences between the 2.

 

Full Boost:14-15 psi, 462whp IP's dd dyno, 8.8:1 pistons, s7r cams/ springs, stock revup heads, strup headers, haltech ems, hks/Powerlab exhaust. Then I made 518 on local dynojet with hks portion of exhaust removed. Any more boost and we started lossing power during tuning.

I asked about the gt37R not because I'm considering that route. I was wondering about it's ability to produce any more power past 550WHP on pumped gas or was it at it's limits at that point. I will try the 1.06 housing then the AEM meth kit but I am not planning on changing out the turbo any time soon. i.e. years

 

My Haltech is on it's way and I am still shopping for bigger injectors.
My goal 600whp, but with octane booster or race fuel.

 

octane booster is pointless. It's shown to only raise octane less than 1 point.


james, aren't s7r cams pretty aggressive? like, too aggressive for 500hp levels. I'm not sure though, i don't know cams.

Like rich was saying it's silly to just move up for another 30hp on pump gas. Once you start getting over 550 you are running up close to the limits of pumpgas anyways so might as well throw the meth on the smaller turbo anyways.

 

Its not the power that controls pump gas ability, its the "abuse" the air and air/fuel mix are taking.

By that I mean heat and timing.

As a gen statement.....18psi of boost, 8000rpm, x timing (this one really varies depending on boost levels and rpm) is the top envelope for 93 octane.
Some folks who can rev higher (i.e. evo's) will run more boost, with less timing at more rpm's.

Tom

 

You are thinking of the Jim Wolf c8's. The S7r is similar to most other's stage 2 cams. They have 262 degree duration and 11.43mm lift. The lift is most aggressive than others but they are still mild cams.

I agree with all who chime in. I feel the swap to the GT37R is a waste of money at this point in the game for my goal of 500whp dd/ 550 whp dynojet on 93 octane. I will be curious to see the powerband of the gt35r with the 1.06 turbine housing at these levels vs the powerband of the gt37r at the same power. I have seen the dyno graphs of the gt37r at 550 whp and full boost is around 4000-4200 rpms and the power climbs rapidly. I hope to see full boost earlier and maintain the linear power that I have with the gt3582r. I wish I could get up to IP sooner. LOL

 

Ya, i guess i worded that wrong. If he's at the limit of pumpgas at 520hp on the 35 then i was speculating that after about 550 on the 37r he would be close to the limit with it. So i was just agreeing with rich's comment that he wouldn't benefit much switching over if he was just staying ni the pumpgas range.

my brain is fried lately so i'm all sorts of retarded on here with my answers.

 

Well I was confused with all this different dyno reading so I decided to take the car to the track today. One problem though, yesterday when rechecking my tune I realized boost was dropping off (16psi @ 6800rpm too 11psi 7300rpm-7500rpm).....thinking my weak .5bar spring or another boost leak
did a few runs anyway and all consistent 127mph trap speed, not bad considering we're at almost 5000ft above sea level, the Z is full spec, a almost full tank of gas and I tip the scale at 265lb.

 

bleeding off psi sounds like hte boost controller can't keep up.

it's no wonder though. .5 bar spring is too light for that. I think they say not to use more htan double the spring pressure. so 14psi would be the limit of pushing your boost controller. You can go further, but i guess some boost controllers can't keep it steady.

 

Well I hope so, like said waiting on a Haltech which I'll use for boost control as well. I will try and get hold of maybe a .8bar spring.

here's a 1/4 mile clip.....I aslo did the 1km sprint twice and the car hits the speed limiter well before the trap.


http://www.youtube.com/watch?v=mTVdjk_RUNU

 

nice run!

 

man, that grocery getter next to you was getting it pretty good too! lol


so english? is it normal for them to announce in english? i didn't think english was one of the 27 national languages of SA

 

LOL at the grocery getter......our country is German brand crazy. I was beaten by a supercharged M3auto e92 in the end by .019

Some much hate, no one want to use the other's language. We found the middle way....English

 

how'd the runs go?

 

I didn't make it this weekend. If it could go wrong, it did. Bad weather, Extreme temps, work issues, and my truck broke down. I will try it again in two weeks. I did receive my 1.06 housing on Friday and the exterior size is the same as the .82 turbine housing but it has alot more material removed from the inside. We should see some new results within the next two weeks from the other guy's that are completing their builds. I'm holding on the meth kit till I hear from them. One question, can I install the new turbine housing and drive the vehicle to IP?