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My s91 setup...

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Old 04-09-2008, 08:00 PM
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Default My s91 setup...

I need to thank DrTurbo for the turbo and all the help. Thank you!!!

this is my old turbo next to my new one.



And this is my motor
I got the short block off a fellow member and I've had the heads for 4yrs new in the box. It is a 383 with a Lunati crank and rods, SRP pistons (a little high on compression) and 210cc AFR's. I almost always build my own motors(well assemble them after the machine shop does the work) but could not pass this short block up.



the car is a 97 T/A and is in need of some safety stuff...
I will be installing a 10pt cage before the motor gets installed.
Old 04-09-2008, 08:48 PM
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Wow, finally a big powered LT1 in the midst of all these LS1's...hehe. That S91 will rock for sure....
Old 04-10-2008, 12:54 AM
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looking good Nick. I've got mine scheduled for the dyno next week. Im finally getting around 14 lbs with my setup. I didn't think you were going to stick with it, but glad you are for sure.
Old 04-10-2008, 02:50 AM
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hmm. this has kind of got me wanting to yank my motor, swap the pistons and throw a s91 on it.
Old 04-10-2008, 03:11 AM
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Which one is the S91












LOL, just kidding that thing is huge!
Old 04-10-2008, 05:54 PM
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Originally Posted by ak95ta
looking good Nick. I've got mine scheduled for the dyno next week. Im finally getting around 14 lbs with my setup. I didn't think you were going to stick with it, but glad you are for sure.


Man I haven't heard from you in a good bit of time... call me sometime.

As for the staying with it part- my old engine made more power on 12lbs than it did on a 200 shot and for the new set up, I don't think a 300 shot will make the kind of power on the motor that the 91mm will.
Old 04-10-2008, 05:57 PM
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Originally Posted by DrTurbo
Wow, finally a big powered LT1 in the midst of all these LS1's...hehe. That S91 will rock for sure....

It will probably blow it apart! LOL
Old 04-10-2008, 06:42 PM
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Not with a good tune! Man, that looks sick. How much boost are you going to be running?

We are all expecting install pics when it comes around to it.
Old 04-10-2008, 08:42 PM
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That's a bad *** setup. What is the old turbo? What are you using for manifolds? I'd like to see some pictures of the whole setup if you have any.
Old 04-10-2008, 08:47 PM
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looking good nick. I havent forgot about u on your cage. still trying to figure the best way to do it.
Old 04-11-2008, 01:10 PM
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I'm not sure on the boost level, I guess we will need to see what the motor will like.I have not built any of the exhaust, but I have most everything I need. As of now I will be putting most of my attention into the car,to get it safe for the power it will have.

The old turbo is a GT42 76mm from PTE, it's got a fresh rebuild on it and I need someone to take it off my hands....
Old 04-11-2008, 10:24 PM
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Originally Posted by nick97ta
The old turbo is a GT42 76mm from PTE, it's got a fresh rebuild on it and I need someone to take it off my hands....
That's good to know. I have a large frame GT42-74mm sitting on my floor next to me. It looks like a S91 will fit where I plan on putting my GT42 then.
Old 04-12-2008, 09:04 AM
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Originally Posted by Beaflag VonRathburg
That's good to know. I have a large frame GT42-74mm sitting on my floor next to me. It looks like a S91 will fit where I plan on putting my GT42 then.
Yes, an S91 will drop into pretty much anywhere a GT42 will.
Old 04-12-2008, 09:50 AM
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any plans of porting the intake for a 58mm? i'm getting closer to seeing what kind of gains the larger TB and larger turbo will do on a 383 LT1 myself.
Old 04-12-2008, 10:34 AM
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Originally Posted by TURBO383WS6
any plans of porting the intake for a 58mm? i'm getting closer to seeing what kind of gains the larger TB and larger turbo will do on a 383 LT1 myself.


yes- I'm going to port the intake to the heads and to a 58mm TB. I don't know what gains I will get because I've had the TB on the car since it was a NA motor.
Old 04-12-2008, 10:39 AM
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Originally Posted by DrTurbo
Yes, an S91 will drop into pretty much anywhere a GT42 will.
From what I see- if you're GT42 turbo has a T6 flange on the exhaust all you would need to change is the cold side pipe at the turbo, because the compressor housings would go from a v-band to slip over connection.



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