Comp vs Precision
Comp vs Precision Hey guys, trying hard to make a decision on turbo(s) for my forged 370 build. Leaning toward twins for that snappy, instantaneous throttle response, but a single is still on the table if it can match the same performance. Street car only, so I don't care about high-RPM top end. My build is a forged 370, 9.8cr, stock 317s, ls6 intake &TB, 4l80e. Goal maybe 700-750rwhp. I'll get a custom cam ground for whatever turbo & converter I pick.
So...sticking to a $1500 price range, I've narrowed down to the following. What do you think?
Twins
-------------------
$650/ea
Precision 6076
59mm compressor
65mm turbine
T4 Vband .58/.68./81/.96 a/r
$575/ea
Comp CT3-6065
60mm compressor
65mm turbine
T3 .36/.48/.63/.82 A/R with 4 bolt discharge
T4 Tangential .58/.68/.81 A/R with 3" V-Band
$800/ea
Comp CT3-6262 Billet
62mm billet compressor
62mm turbine
T3 .36/.48/.63/.82 A/R with 4 bolt discharge
T3 .63/.82 A/R with 3" V-Band discharge
T4 Tangential .58 A/R with 3" V-Band discharge
Single
------------------
$1575
Comp 7879 (ceramic BB)
78mm billet compressor
79mm turbine
.58/.68/.70/.81/.84/.96/1.15/1.32
$1450
Precision 7675
76mm billet compressor
75mm turbine
T4 Tangential .81/.96 A/R with 3 5/8" V-Band discharge
Oh and this is just a weekend toy, probably 2K miles a year. So I probably don't need the best of the best. Just something reliable for a reasonable price. Thanks
So...sticking to a $1500 price range, I've narrowed down to the following. What do you think?
Twins
-------------------
$650/ea
Precision 6076
59mm compressor
65mm turbine
T4 Vband .58/.68./81/.96 a/r
$575/ea
Comp CT3-6065
60mm compressor
65mm turbine
T3 .36/.48/.63/.82 A/R with 4 bolt discharge
T4 Tangential .58/.68/.81 A/R with 3" V-Band
$800/ea
Comp CT3-6262 Billet
62mm billet compressor
62mm turbine
T3 .36/.48/.63/.82 A/R with 4 bolt discharge
T3 .63/.82 A/R with 3" V-Band discharge
T4 Tangential .58 A/R with 3" V-Band discharge
Single
------------------
$1575
Comp 7879 (ceramic BB)
78mm billet compressor
79mm turbine
.58/.68/.70/.81/.84/.96/1.15/1.32
$1450
Precision 7675
76mm billet compressor
75mm turbine
T4 Tangential .81/.96 A/R with 3 5/8" V-Band discharge
Oh and this is just a weekend toy, probably 2K miles a year. So I probably don't need the best of the best. Just something reliable for a reasonable price. Thanks
Comp 6065 those are GREAT turbos and make good power, reliable and cheap. lots of guys using the 6x65 on supras and 4-cyl cars
Single out of those 2 I would pick the PTE7675 and hope you get a good one
From comp you can get a custom turbo I would get a TBB billet 7888 with a 1.32 housing in the with a CT43 compressor cover. This is a CT5 turbo with the smaller compressor, and the 74+mm wheels HAVE TO HAVE more than the 79 turbine or they dont work for **** on a 350+ci motor
Single out of those 2 I would pick the PTE7675 and hope you get a good one
From comp you can get a custom turbo I would get a TBB billet 7888 with a 1.32 housing in the with a CT43 compressor cover. This is a CT5 turbo with the smaller compressor, and the 74+mm wheels HAVE TO HAVE more than the 79 turbine or they dont work for **** on a 350+ci motor
Comp 6065 those are GREAT turbos and make good power, reliable and cheap. lots of guys using the 6x65 on supras and 4-cyl cars
Single out of those 2 I would pick the PTE7675 and hope you get a good one
From comp you can get a custom turbo I would get a TBB billet 7888 with a 1.32 housing in the with a CT43 compressor cover. This is a CT5 turbo with the smaller compressor, and the 74+mm wheels HAVE TO HAVE more than the 79 turbine or they dont work for **** on a 350+ci motor
Single out of those 2 I would pick the PTE7675 and hope you get a good one
From comp you can get a custom turbo I would get a TBB billet 7888 with a 1.32 housing in the with a CT43 compressor cover. This is a CT5 turbo with the smaller compressor, and the 74+mm wheels HAVE TO HAVE more than the 79 turbine or they dont work for **** on a 350+ci motor
I'd go with a BW S482 Billet turbo. Check these out. This turbo will blow both of those away.
http://www.workturbochargers.com/pro...category_id=35
http://www.workturbochargers.com/pro...category_id=35
The 83mm turbine you can get a in a T4 house. This is the exact same turbo I just ordered. The 96mm Turbine has to be a T6
http://www.workturbochargers.com/pro...category_id=35
http://www.workturbochargers.com/pro...category_id=35
The 83mm turbine you can get a in a T4 house. This is the exact same turbo I just ordered. The 96mm Turbine has to be a T6
I'd go with a BW S482 Billet turbo. Check these out. This turbo will blow both of those away.
http://www.workturbochargers.com/pro...category_id=35
http://www.workturbochargers.com/pro...category_id=35
The 83mm turbine you can get a in a T4 house. This is the exact same turbo I just ordered. The 96mm Turbine has to be a T6
http://www.workturbochargers.com/pro...category_id=35
http://www.workturbochargers.com/pro...category_id=35
The 83mm turbine you can get a in a T4 house. This is the exact same turbo I just ordered. The 96mm Turbine has to be a T6
the comp 6065 with a .82 housing should make 850whp easy in a twin setup, thats only 425whp each and that will be no issue, most of the 4cyl guys are making a solid 500whp with these
Regarding the post above there is no way I would run bigger than the 72mm standard BW compressor wheel with the 83mm turbine, none the less the billet 82mm wheel. The billet wheel needs a minimun of the 92mm turbine and ideally the 96mm turbine in a v8 application, or backpressure will be through the roof
Regarding the post above there is no way I would run bigger than the 72mm standard BW compressor wheel with the 83mm turbine, none the less the billet 82mm wheel. The billet wheel needs a minimun of the 92mm turbine and ideally the 96mm turbine in a v8 application, or backpressure will be through the roof
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Verdad Gallardo On a 370CI LS motor with the 83mm turbine in a T4. It would spool almost instantly. I have a little 281CI 4.6L mod motor and I don't think I will have any issue spooling this turbo when I lay my foot in it. But I do have a TH400 auto. I had a GT4276 and It would spool instantly when I hit it and it has the same turbine as this new turbo and just about same AR housing. But that is a Cast 76mm and the new turbo will be a billet 82mm
Regarding the post above there is no way I would run bigger than the 72mm standard BW compressor wheel with the 83mm turbine, none the less the billet 82mm wheel. The billet wheel needs a minimun of the 92mm turbine and ideally the 96mm turbine in a v8 application, or backpressure will be through the roof
I'd go with a BW S482 Billet turbo. Check these out. This turbo will blow both of those away.
http://www.workturbochargers.com/pro...category_id=35
http://www.workturbochargers.com/pro...category_id=35
The 83mm turbine you can get a in a T4 house. This is the exact same turbo I just ordered. The 96mm Turbine has to be a T6
http://www.workturbochargers.com/pro...category_id=35
http://www.workturbochargers.com/pro...category_id=35
The 83mm turbine you can get a in a T4 house. This is the exact same turbo I just ordered. The 96mm Turbine has to be a T6
How much is the billet 83 with the 87 turbine in a T4 with race cover? PM is you need to.
This is a serious question, and im curious... Has anyone actually had "GOOD" results with a comp turbo yet in the larger displacement world? Seems ive read two threads on here where the user has not had any good luck? None where they have...
I take that back, one thread where it did ok in a rear mount app....
I take that back, one thread where it did ok in a rear mount app....
i run the tc78. i make 780-800hp on 19.8lbs. yes the back pressure is an issue if you want more power, but i beat this thing RAG GED on this setup with no issue, i run an off the shelf comp turbo cam. its cheap. and when your ready to upgrade, you can just throw it a way and get serious. i have a 1.15 a/r on a 4 inch down pipe. i dont recomend comp, do your own research on the exhaust wheel before you go comp.
This is a serious question, and im curious... Has anyone actually had "GOOD" results with a comp turbo yet in the larger displacement world? Seems ive read two threads on here where the user has not had any good luck? None where they have...
I take that back, one thread where it did ok in a rear mount app....
I take that back, one thread where it did ok in a rear mount app....
https://ls1tech.com/forums/forced-in...ome-money.html
There's a user here named Code4. Says he's had good luck with them on a 348.
https://ls1tech.com/forums/forced-in...ome-money.html
https://ls1tech.com/forums/forced-in...ome-money.html
I see guys that don't sell comp turbos bashing them & get tired of it. I had a TC 76 before & you want to talk about back pressure OMG but no one was bashing them.
these little small frame turbos will only do so much, need bigger, go bigger.
I had a catastrophic failure of my own doing & they still fixed it at no cost. Then after it was done I changed my mind & wanted twins. They hooked me up even trade, I couldn't believe it.
