serious turbo question
serious turbo question first of all, i am, without a doubt putting a turbo on my car so please don't tell me to search this topic. with that aside, here's what i'm asking. i've got a 96 trans am w/ a low compression (approx. 8.5:1) 383 stroker w/ a summit crank, eagle rods and JE forged/dished pistons that is being freshened up by Texas Speed. the heads are ported and pollished as well as the intake. stock valves will probably be replaced w/ aftermarket depending on what the machine shop recommends. what i was wanting to know from the 
"Turbo Gods" is which turbo would be best suited for my setup? I'm not looking to have the fastest car around, but would like to have it somewhere in the neighborhood of 12 - 15 psi. normally would only run 5 - 7 psi, but might turn it up at the track. this is going to be mainly a street car but will see some track time occasionally. I've been mainly looking into the PTK because of the header setup they include. so far in my searching, i haven't seen another kit w/ these. don't really want an air-to-water intercooler either. if you need more details, let me know. thanks in advance, Johnny.
"Turbo Gods" is which turbo would be best suited for my setup? I'm not looking to have the fastest car around, but would like to have it somewhere in the neighborhood of 12 - 15 psi. normally would only run 5 - 7 psi, but might turn it up at the track. this is going to be mainly a street car but will see some track time occasionally. I've been mainly looking into the PTK because of the header setup they include. so far in my searching, i haven't seen another kit w/ these. don't really want an air-to-water intercooler either. if you need more details, let me know. thanks in advance, Johnny. 
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From: College Station, Tx
I would probably go ahead and go with a single t76q or R trim. It will allow for a little more headroom in your setup, while still giving you as much throttle response as you could desire (probably more than you want depending on the a/r ratio).
What's really going to make the difference is the kit, supporting parts, and tuning. One of my roommate's is building a few LT1 turbo kits (has already done a few also) - you can see pics @ http://www.fastblackcar.com/camaro/turbomotor/ - that's from the first generation of kit. (That was a t-76 q trim).
What's really going to make the difference is the kit, supporting parts, and tuning. One of my roommate's is building a few LT1 turbo kits (has already done a few also) - you can see pics @ http://www.fastblackcar.com/camaro/turbomotor/ - that's from the first generation of kit. (That was a t-76 q trim).
Originally Posted by gogogadgetcar
looking at the compressor maps and the boost pressure you want to run... you could use a single a T-88 or two T60-1/T62-1's.
but...http://www.fastblackcar.com/camaro/t...header/coated/
are the headers(for my PTE88) going on my car..
The PTK kit is very nice, but for (i think) the power you want it might not be the best choice. The PTK kit was designed around a stock car, stock k member, ABS in stock location etc.. so some pretty big compromises were made. if you dont mind moving some small stuff around(mainly the ABS).. you can do a better job. you will notice the PTK has a 90degree bend at the cross over junction.
Dont get me wrong, the PTK setup is nice.. but its kinda like a base S-trim kit.. its meant for something, some people push it.. but its not meant for bigger/better
Email me and maybeI can help you out..
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From: malmstrom Air Force Base, Montana
Originally Posted by JordonMusser
i dont really agree with that but...
..
but.....
Gary
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From: College Station, Tx
I would also think a T-88 is a bit much for what he seems to be asking. Obviously it's hard to tell with just boost levels instead of HP goals, but either way a t-88 is going to be able to support a good bit more than his 12-15psi on whatever engine he wants.
A T76R trim would actually come somewhat close to a small frame T-88, and should spool better, etc.
A T76R trim would actually come somewhat close to a small frame T-88, and should spool better, etc.
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From: malmstrom Air Force Base, Montana
ya, your right about the 88. In fact I went back and replotted everything on the T-76 map and it does look like it would work. I must have typed something in wrong the first time. The only thing I noticed is that at rpm's above 6K it (the T-76) looks like it is getting out of it's efficniency range, but that probably isn't the case on the R trim.
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Sounds to me like you have maybe only a few choices for an LT1 turbo kit:
Turbotech
PTK
I wonder if the Turbotech kit would support your 383ci.
The PTK sounds promising.
Turbotech
PTK
I wonder if the Turbotech kit would support your 383ci.
The PTK sounds promising.
Originally Posted by TURBO383WS6
first of all, i am, without a doubt putting a turbo on my car so please don't tell me to search this topic. with that aside, here's what i'm asking. i've got a 96 trans am w/ a low compression (approx. 8.5:1) 383 stroker w/ a summit crank, eagle rods and JE forged/dished pistons that is being freshened up by Texas Speed. the heads are ported and pollished as well as the intake. stock valves will probably be replaced w/ aftermarket depending on what the machine shop recommends. what i was wanting to know from the "Turbo Gods" is which turbo would be best suited for my setup? I'm not looking to have the fastest car around, but would like to have it somewhere in the neighborhood of 12 - 15 psi. normally would only run 5 - 7 psi, but might turn it up at the track. this is going to be mainly a street car but will see some track time occasionally. I've been mainly looking into the PTK because of the header setup they include. so far in my searching, i haven't seen another kit w/ these. don't really want an air-to-water intercooler either. if you need more details, let me know. thanks in advance, Johnny.
"Turbo Gods" is which turbo would be best suited for my setup? I'm not looking to have the fastest car around, but would like to have it somewhere in the neighborhood of 12 - 15 psi. normally would only run 5 - 7 psi, but might turn it up at the track. this is going to be mainly a street car but will see some track time occasionally. I've been mainly looking into the PTK because of the header setup they include. so far in my searching, i haven't seen another kit w/ these. don't really want an air-to-water intercooler either. if you need more details, let me know. thanks in advance, Johnny.LS1 Tech Stories
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Anyhow, the T76/GTQ will work well, however I am of the belief that the standard t04 stuff is just too small(exhaust FLOW wise) for big power V8s. they are better in twin setups. Not that they dont make power of course.
although the 88 would work for your app, it might by laggier than a T76, and you wont be using the full ability of the 88.
Anyhow, the T76/GTQ will work well, however I am of the belief that the standard t04 stuff is just too small(exhaust FLOW wise) for big power V8s. they are better in twin setups. Not that they dont make power of course.
although the 88 would work for your app, it might by laggier than a T76, and you wont be using the full ability of the 88.
Staging Lane
Joined: Nov 2001
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From: Illinois
Originally Posted by Pro Stock John
Sounds to me like you have maybe only a few choices for an LT1 turbo kit:
Turbotech
PTK
I wonder if the Turbotech kit would support your 383ci.
The PTK sounds promising.
Turbotech
PTK
I wonder if the Turbotech kit would support your 383ci.
The PTK sounds promising.
Are you selling kits Jordan?
Besides the one I am talking about, there is also one being worked on down south...I think they are looking for like X cars to put them on or something at a decent price for more testing. www.turbolocity.com. Its a twin setup.
sorry, i wasn't very specific in my original post. i've looked into both the twin and the single turbo setups and have decided that i want a single. most have suggested the T76, however, a local guy that was sponsored by turbonetics has recommended something called a GT40. haven't heard much about these, but according to him it is hands down the best choice for my application. any1 know anything about these or if he's right? as far as horsepower goes, like i said, nothing mind blowing but above 500 RWHP. hope this makes a little more sense now. i'm by no means an expert on turbos, but i figure between the motor setup i have and a decent turbo/ic, 500 should be easily obtainable w/ room to expand. please let me know what you guys think.
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From: College Station, Tx
GT40 Compressor map
Going to be pretty close to if not maxxed out at your 15psi value. Say around 600rwhp max. I would want a bit more headroom than this turbo offers.
Just a guess but is this local guy more familiar with smaller engines? That's the biggest "issue" you will run into - the exhaust volume you have with a 383" V8 is a big difference compared to what alot of people are used to sizing turbo's for.
For comparison here is a T-76 compressor map.
Should support closer to 800rwhp MAX - but since realistically there is not reason to do a max effort setup here it would be a more comfortable choice, plus giving you room in the future if (when) you decide you want a bit more power You compression is low enough either way.
Chris
Going to be pretty close to if not maxxed out at your 15psi value. Say around 600rwhp max. I would want a bit more headroom than this turbo offers.
Just a guess but is this local guy more familiar with smaller engines? That's the biggest "issue" you will run into - the exhaust volume you have with a 383" V8 is a big difference compared to what alot of people are used to sizing turbo's for.
For comparison here is a T-76 compressor map.
Should support closer to 800rwhp MAX - but since realistically there is not reason to do a max effort setup here it would be a more comfortable choice, plus giving you room in the future if (when) you decide you want a bit more power
You compression is low enough either way.Chris
Chris, that was exactly what i was looking for. looks like every1 was right in suggesting the T76. couple of questions here also, does this come w/ a ballbearing option and would you recommend going that route? also, the guy that was suggesting the gt40 to me is more familliar w/ built mustangs. thanks again, Johnny.
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From: College Station, Tx
You can get a bearing option - the biggest benefit is going to be spool time, though that isn't going to be a tremendous issue for you with your cubic inches. It depends if the price difference is reasonable or not. It definitely can't hurt. Check out the price on a ball bearing R-trim - if that price works for you then go for it, as that is pretty much the best option in this category for you.
Originally Posted by ChrisB
You can get a bearing option - the biggest benefit is going to be spool time, though that isn't going to be a tremendous issue for you with your cubic inches. It depends if the price difference is reasonable or not. It definitely can't hurt. Check out the price on a ball bearing R-trim - if that price works for you then go for it, as that is pretty much the best option in this category for you.
I'm assuming that Chris and Jordan know each other being from the same town and all. since both of you and a few others i have talked to seem to agree on the T76GTQ, that'll probably be my choice. just out of curiosity, what brand BOV, wastegate, fuel pump, and injectors would you recommend? oh yeah, Jordan, you've got mail. if you're selling a turbo kit, you've probably got a buyer. let me know something either way because i've got to get something going. tired of being w/out my baby. thanks again fellas.
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From: College Station, Tx
That would probably be a safe bet!
On the BOV and wastegate tial is probably the best out there for both. I would go with the 46mm Tial wastegate and the 46mm BOV. For fuel pump I would do a dual walbro setup (inline or intank), and for injectors definitely an impedance converter box and some 72lb/hr low impedance injectors.
On the BOV and wastegate tial is probably the best out there for both. I would go with the 46mm Tial wastegate and the 46mm BOV. For fuel pump I would do a dual walbro setup (inline or intank), and for injectors definitely an impedance converter box and some 72lb/hr low impedance injectors.