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91 Z28 370/ST80/4l80E Build

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Old 07-20-2011, 11:36 AM
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I got the car on the dyno, the tune isnt completely done but at 14 lbs it made 738 rwhp 756rwtq. When im done i would like to be up to at least 16 lbs so theres quite a bit more power left on the table.
Old 07-20-2011, 11:42 AM
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great #'s!! get it to the track now.. same turbo I'm thinking of going with.. do you know if they make a BB version of it?
Old 07-20-2011, 11:57 AM
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I dont think they do.
Old 07-21-2011, 08:27 AM
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Setup looks awesome man great job! A few questions, what size dp and exhaust under the car? How much timing were you running on the 14psi pull? Does the crossover under trans hang low? What size intercooler? Meth? Sorry for all the questions but I recently for mine running and its set on 5 Psi, I'd like to start turning up the boost but Im running the msd 6010 with just a base timing curve in it with 35° timing. I know its alot but its safe with just 5 Psi. It runs like a raped ape on 5 Psi but Ian feeling the itch to get it on the dyno soon! Car looks great man nice job!
Old 07-21-2011, 10:02 AM
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That's awesome! This is on the same log setup?? I hope so.. I have almost the same hotside and looking at a similar turbo.
Old 07-21-2011, 11:10 AM
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Originally Posted by turbo iroc
Setup looks awesome man great job! A few questions, what size dp and exhaust under the car? How much timing were you running on the 14psi pull? Does the crossover under trans hang low? What size intercooler? Meth? Sorry for all the questions but I recently for mine running and its set on 5 Psi, I'd like to start turning up the boost but Im running the msd 6010 with just a base timing curve in it with 35° timing. I know its alot but its safe with just 5 Psi. It runs like a raped ape on 5 Psi but Ian feeling the itch to get it on the dyno soon! Car looks great man nice job!
The down pipe is a 3.5" then goes to 4" just behind the front tire, then a 4" exhaust all the way back with a bullet as a resonator and a magnaflow race muffler in the back. The crossover does hang low but its never hit, my deep trans pan is actually the lowest point, and i've never even hit that yet. But im sure i would on a speed bump. I did the intercooler a few years ago so I cant recall the size exactly but its a common size for 3rd gens and 4th gens. No meth right now, maybe down the road. Your not getting any knock at 35*? Im running 14-15* at wot.

Originally Posted by 91blowthru
That's awesome! This is on the same log setup?? I hope so.. I have almost the same hotside and looking at a similar turbo.
Its a new log set up I made, same design as before I just upped the size of the log on the passenger side from 2.5" to 3". I would highly recomend this turbo. I was concerned about the turbo being laggy but this turbo spools quick. From a dead dig at a stop light I can get on it and be spooled up by the time I get to the other side of the intrersection. I have a tbrake and a 2step but havent even used it yet, on the foot brake alone I can build up about 5 lbs in just seconds.
Old 07-21-2011, 12:03 PM
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That's excellent to hear. I'm using the tc78 just this year, 3 1/2" dp.. trying to go 10's on pump gas. In a gmc Sonoma. Weighs 3600ish ... next year bigger turbo , hopefully 140 mph traps...
Old 07-21-2011, 02:38 PM
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hell yes man that some great power!!!. I want to sell my ST-80 if you know any one looking for one
Old 07-21-2011, 03:37 PM
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Thanks for the info! No not a hint of knock with 9.3:1 comp. Blow thru Carb, fmic, 93 pump gas.
Old 07-21-2011, 03:40 PM
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Have you seen my build? You should check it out, ithink you'd like it!
Old 07-21-2011, 06:12 PM
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Your car is awsome,great work you have done,a real sleeper
Old 07-22-2011, 07:03 PM
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looks great. kinda hard to tell but it looks like there plenty of room around the down pipe? ive got a bunch of 3.5 i need to transform into the downpipe, wasnt sure how good it was going to fit
Old 07-22-2011, 10:32 PM
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Originally Posted by turbo iroc
Have you seen my build? You should check it out, ithink you'd like it!
Yea I seen your thread. Looks great.

Originally Posted by KagA152
looks great. kinda hard to tell but it looks like there plenty of room around the down pipe? ive got a bunch of 3.5 i need to transform into the downpipe, wasnt sure how good it was going to fit
Theres a descent amount of room but I also notched the inner frame rail about a 1/2" for clearance when I had the engine out.
Old 07-22-2011, 10:35 PM
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I'm running a 4in dp and didn't have to notch anything. Plenty of room.



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