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35/40 Limitations

Old 02-24-2004, 10:40 AM
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Could I get some feed back from some gt35/40 owners.

I hear that the top end on these dies off pretty fast.

What are your driving impressions of this turbo.

Please dont bother posting graphs, or chart comparisons, It would go right over my head and I still wouldnt know what to expect from one.

I'm bored with my set up and want something faster. I dont need big horsepower. Somewhere just over 400 would be all I really want. I'm not huge on the track so I just don't have a need for BIG HP.But all the local stuff that Iam competing with has gobs of low end and I need something that will get me to 120 mph before everyone else.

I ran into a Supercharged 5.notsoslow, and I got pulled on due to a torn coupler, but I dont want to let that stuff happen again, even if a torn coupler was to blame this time.



Thanks for any input.
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Old 02-24-2004, 10:58 AM
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Felt like a dumbass, I just saw the other topic on the sam matter. Anyway my question still stands since that thread got off the gt35/40 topic.

Where are this turbos limitations?

What horsepower should be expeted for say 17psi on pump gas?

Is the 35/40 the answer to my prayers?
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Old 02-24-2004, 11:27 AM
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I don't think you can make past 480rwhp on the gt35/40.

@ 17psi you could make 450rwhp if you had the right porting/tuning ect.
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Old 02-24-2004, 11:48 AM
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Dave,



Play around with Wargasm's dyno page some. There's only 3 35/40 dynos on there.



Here's one showing:



- Dick Lamberts stock turbos (probably perfectly maintained and tuned) don't know if it's ported or not.

- Ihor's 35/40 @ 15 psi and 20 psi. Heavily street-ported engine, we've all seen video of it running, I think.

- Toy's 35/40 @ 16 psi. don't know if it's ported.

- RP T78 car. don't know if it's ported either.



Up to about 3800 RPM the stock twins are putting out more power. Stock and 35/40 clearly spank this T78.



However, with a bigger turbo I've seen power to match the 35/40 with almost no porting, (ie. sounds exactly like stock).



Serious porting can make a BIG turbo spool quickly, but you also need a well designed manifold to help.



GT35R VS stock twins VS T78



Hey, and keep in mind you're racing a 2.6L motor DESIGNED for high RPM against 5L and up motors designed for low RPM. You can't make the motor do what it's not designed to do no matter what you strap to it, unless you want to use nitrous.
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Old 02-24-2004, 01:29 PM
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Originally Posted by TYSON' date='Feb 24 2004, 09:48 AM
Dave,



Play around with Wargasm's dyno page some. There's only 3 35/40 dynos on there.



Here's one showing:



- Dick Lamberts stock turbos (probably perfectly maintained and tuned) don't know if it's ported or not.

- Ihor's 35/40 @ 15 psi and 20 psi. Heavily street-ported engine, we've all seen video of it running, I think.

- Toy's 35/40 @ 16 psi. don't know if it's ported.

- RP T78 car. don't know if it's ported either.



Up to about 3800 RPM the stock twins are putting out more power. Stock and 35/40 clearly spank this T78.



However, with a bigger turbo I've seen power to match the 35/40 with almost no porting, (ie. sounds exactly like stock).



Serious porting can make a BIG turbo spool quickly, but you also need a well designed manifold to help.



GT35R VS stock twins VS T78



Hey, and keep in mind you're racing a 2.6L motor DESIGNED for high RPM against 5L and up motors designed for low RPM. You can't make the motor do what it's not designed to do no matter what you strap to it, unless you want to use nitrous.
I agree that there is now way I can keep from getting whooped up till say 3800-4000. But after that I need one serious good kick in the pants. Hopefully the 35/40 would come to full spool at say 3800-4000 with the right manifold/and my ports. My twins come on line at about 3900(non-seq). I have Demetrious to bug about tunning.

I imagine he could get me where I want to be as long as this turbo is willing.

Thanks for the link to Brians page.

I still would like to know where does the 35/40 fall off and where is it's effincey range?



Thanks for chimming in.
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Old 02-24-2004, 01:35 PM
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If you've already ported, then go bigger than the 35R.



GT40R or buy my GT42!
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Old 02-24-2004, 01:36 PM
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Wow, in that dyno comparison the 35/40 looks like the ****!

The t-78 really has a sketchy power band, laggy then spoolin but still not nice and smooth.

The 35/40 seems to be really smooth.

I like.



Red line is a t-78

Purple line is twins

Blue is a 35r on 16 psi

Green lines are both 35R, Light green is at 20 psi , and dark green is at 15 psi.







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Old 02-24-2004, 01:37 PM
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Originally Posted by TYSON' date='Feb 24 2004, 11:35 AM
If you've already ported, then go bigger than the 35R.



GT40R or buy my GT42!
Whats the 35r?

Yes I am ported. Its an Aggro street port!

Would these others spool in the same time frame?

Sorry but honestly I am turbo stupid so please bear with me.
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Old 02-24-2004, 01:47 PM
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35R is the 35/40. Whoever these guys started buying them from for RX-7's called it the 35/40 for some reason. Garrett calls it the 35R.



My 42 spools well. On stock ports on my car I could hit 3 psi in neutral by going WOT to redline. From 2000 RPM in 5th the wastegates (7lb spring) opened @ 2700 RPM. Please try that with your car if you're driving it now and let me know how it compares, I haven't seen the stock turbos tested to compare.



Maybe Badog could comment on the GT40R, I don't know if it's running yet?
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Old 02-24-2004, 01:53 PM
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So you want me to do what now?

What about Michel? Did he ever get is Gt-40?

Oh and thanks for the tip on the turbo name. 35R its is from now on.
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