Dyno 402 T76GTQ ### in
10-24-2006, 01:26 PM
#41
Originally Posted by DrTurbo
Yeah the S series is T6 though and it will make BIG power.
I don't want the lag of a T88 sized turbo but I want more flow/power potential then a T76.
10-24-2006, 01:48 PM
#43
Originally Posted by DrTurbo
An S76 will spool around 3600-3800 of course alot depends on the compression, cam, head flow...etc..etc.
225/225, 581/581, 113lsa. Looking for 700rwhp pump, 800+rwhp race gas.
Would you prefer the S76 or S78 for this setup...
Thanks for your input by the way and sorry to jack the thread kinda.
10-24-2006, 06:44 PM
#45
Originally Posted by DrTurbo
I would go with the S76 for that. Spool nicely and make big power with that setup. I don't see 800rwhp being a problem.
10-24-2006, 07:18 PM
#46
Originally Posted by TURBO383WS6
ok, you guys have definately got me worried now. i've got a 9.1:1 compression 383 LT1 w/ a PT76GTS.
Mike
10-24-2006, 08:48 PM
#47
I wonder how a Q-trim vs a GTQ would be?? I hear that the GTQ flows much better and then the standard Q, plus also T-netics has a new turbine wheel that is suppose to be between the GTQ and GTS turbine wheel, wonder how that wheel does.
10-24-2006, 09:02 PM
#48
Originally Posted by Stupid Boost
I wonder how a Q-trim vs a GTQ would be?? I hear that the GTQ flows much better and then the standard Q, plus also T-netics has a new turbine wheel that is suppose to be between the GTQ and GTS turbine wheel, wonder how that wheel does.
10-24-2006, 09:32 PM
#49
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Well tonight was the first time I really got in the car hard with new setup. Man it pulls really hard. I took one of my friends for a ride. He has a turbo Hybussa making 500 hp to ground he was very impressed. Only got on it threw 3rd gear. I am planning on taking it to the track this weekend. I still have factory 10 bolt so it's going to be street tires for me. We only have 1000 ft track here but I am expecting close to 120 mph. I am thinking of going with some sort of 88 turbo but not sure which one.
10-25-2006, 08:31 AM
#51
Originally Posted by engineermike
You don't have anything to worry about. If the T76GTS can make 990 rwhp with 355 cid, I really doubt an extra 28 cid is going to reduce the capability much. Also note that they're talking about the smaller Q-trim exhaust (900 hp limit) as opposed to your S-trim (1100+ hp limit).
Mike
Mike
Mike, you should see if yould could squeeze a T4 T88 into your kit (probably need some minor rework)... I bet you could see +150rwhp over what you make now.
10-25-2006, 12:25 PM
#52
Originally Posted by RealQuick
The quoted numbers I believe were 950rwhp @ 24psi, but nobody has come close to that # on any of the boards (LSX or LTX), so we should be careful by throwing around the big numbers (so people dont feel let down when they dont come close). The Q trim is rated for 975fwhp versus the GTS 1100fwhp.
Originally Posted by RealQuick
Mike, you should see if yould could squeeze a T4 T88 into your kit (probably need some minor rework)... I bet you could see +150rwhp over what you make now.
10-25-2006, 12:49 PM
#53
Yes that LT1 made 987rwhp peak, but could not hold it. It would spike up then drop off. So realistically it probably was making low 900's-high 800's as an average. Also running a turbo without a wastegate is not the best thing for it if your thinking longevity.....lol
10-25-2006, 04:09 PM
#56
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My 76GTQ, according to compressor maps, will be high up there in the efficiency range at 14,15 psi... Just right for me for maximum spool/powerband. But I have 346 cubes... I can't imagine how hard the turbo would be pushed with EVEN MORE displacement. Just my $0.02
For that displacement, it should've have been AT LEAST a 76GTS (will flow more). Can something bigger fit on that kit?
76GTS is ideal on a 346 on pump (~15psi), with a little room for a race gas tune (15 psi+). My 76GTQ will be no good for race gas/high boost over 15 psi on 346 cubes. Yours is on a 402. That turbo MIGHT be getting choked, but I am not an expert. Good luck man. 600+ rwhp is 600 rwhp+ Sounds good for now, especially on the stock 10-bolt.
For that displacement, it should've have been AT LEAST a 76GTS (will flow more). Can something bigger fit on that kit?
76GTS is ideal on a 346 on pump (~15psi), with a little room for a race gas tune (15 psi+). My 76GTQ will be no good for race gas/high boost over 15 psi on 346 cubes. Yours is on a 402. That turbo MIGHT be getting choked, but I am not an expert. Good luck man. 600+ rwhp is 600 rwhp+ Sounds good for now, especially on the stock 10-bolt.
10-25-2006, 07:04 PM
#57
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My old motor was forged 347 and it 18 psi of boost on it. Yes I can put bigger turbo on this setup. Just need to modify the frame rail for clearance. With current setup there is no lagg. Spools very quickly.
10-25-2006, 09:17 PM
#60
Originally Posted by 02SSLE
What kind of exhaust preasure should I find before the turbo? I am going to check it this weekend.
Mike