PT76 non-billet vs billet
02-13-2012, 08:38 PM
#1
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PT76 non-billet vs billet What are each one of their capabilities on a forged 370? How much of a real difference is there between the two. I just picked up a used non billet turbo and now have a chance for a good deal on a billet turbo. Is it worth the switch.
02-13-2012, 11:12 PM
#2
There is a huge difference. Depending on the wheel, if its cast, its probably Garrett or Turbonetics based. Just for reference, we would max out a PTE 4276 @ 850-875 rwhp. The same hotside, which was garrett based, but with the PTE CEA wheel, would max out around 1000-1050.
Thats an easy 100-150 rwhp difference. Same compressor cover
Thats an easy 100-150 rwhp difference. Same compressor cover
02-14-2012, 10:11 AM
#6
On a 347 ci windsor, going from the cast 6 blade to the billet, gained about 37rwhp. All else was the same...just the unit with the different comp wheel was changed. This was on a 5spd car as well.
02-14-2012, 11:25 AM
#7
Big difference!
I think a lot of people are stuck on the if the turbine is bigger then it will make more power, and that they forget that the wheels are attached to each other and that the compressor will run out steam also and it's not just the turbine side.
I think a lot of people are stuck on the if the turbine is bigger then it will make more power, and that they forget that the wheels are attached to each other and that the compressor will run out steam also and it's not just the turbine side.
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02-14-2012, 12:34 PM
#8
Correct we did a swap from a Cast version to a billet version on a 402 and gained nothing. The back pressure was killing the turbo.
02-26-2012, 09:19 PM
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so dr turbo, would you recommend a pt7675 do on a 370? i called precision and they said it would max out around 700 rwhp with the .96? seemed low to me...
I wanted to build my ls1 block but have seen a few people cracking sleeves lately is making me want to stay iron and if im gonna have the weight i might as well go bigger cubes then a 5.3. Or would it be better to stay smaller displacement on this turbo? Im not after a dyno queen(even though my sig says so hahaha) but want to be able to turn it up over 800 just for ***** and giggles... lol
if it matters i have a 46mm gate vented to atmosphere..
I wanted to build my ls1 block but have seen a few people cracking sleeves lately is making me want to stay iron and if im gonna have the weight i might as well go bigger cubes then a 5.3. Or would it be better to stay smaller displacement on this turbo? Im not after a dyno queen(even though my sig says so hahaha) but want to be able to turn it up over 800 just for ***** and giggles... lol
if it matters i have a 46mm gate vented to atmosphere..
Last edited by got-a-ls1; 02-26-2012 at 11:30 PM.
