Pro Turbo Lightning kit
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From: Portland, Oregon. USA
Originally Posted by camcojb
Got a call into PTS. The turbo is 4" inlet and 3" outlet so it's either a 3" or 3.5" pipe. I'll let everyone know once I find out.
Jody
Jody
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From: Palm Coast, FL
Originally Posted by Silver-Bolt
Wait a minute, a 3.0-3.5" downpipe? My STi is a 2.5L and my downpipe is 3.0". That will be a huge restriction on a 5.4L with a T76. Even Supra's with a 3.0L running a T76 use a larger diameter. Something is not right here.
. The 3" will do just fine for most setups.
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From: Wilton, Ca.
Originally Posted by LightningTuner
I made 753rwhp with the 76 GTSH and the 3" downpipe. It's not as bad as you think. I went up to a 4" pipe at PTK's advice, and only picked up 50rwhp. Not that I was complaining about 50 rwhp . The 3" will do just fine for most setups.
. The 3" will do just fine for most setups.Perfect!
Thanks Sal, 753 rwhp would be awesome but I'm guessing you may have had some tricks in that motor! 
I do think I'm make 700-725 rwhp though.Jody
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From: Searcy, AR
Originally Posted by camcojb
Perfect! Thanks Sal, 753 rwhp would be awesome but I'm guessing you may have had some tricks in that motor! I do think I'm make 700-725 rwhp though.
Jody
Thanks Sal, 753 rwhp would be awesome but I'm guessing you may have had some tricks in that motor! I do think I'm make 700-725 rwhp though.Jody
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From: The People's Republic of Los Angeles
Originally Posted by LightningTuner
. . . It's not as bad as you think. I went up to a 4" pipe at PTK's advice, and only picked up 50rwhp. . . .
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From: Wilton, Ca.
Originally Posted by Frank5L
I hope you can with a built motor. What are your cam specs? Good blower cams don't translate into good turbo cams.
With that said I don't think Sal did turbo spec'd cams in his but I'm not sure. Mine are Stage II Crowers, but to Dante's specs which have more lift than off the shelf Crowers, but less duration and overlap. Hopefully they'll work well, we shall see.
Jody
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From: Wilton, Ca.
Originally Posted by Tim Skelton
If a few pennies more for a 4" pipe would even net 10 rwHP -- as well as leaving room for future power increases, why would you not?
You're right Tim and if I'd have known this in advance I would have opted for the 4" downpipe. But being as the 3" supports 750 rwhp at least, then there are very few guys who would need more room as far as a Lightning kit would go.
Jody
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From: Searcy, AR
Originally Posted by camcojb
I understand exactly what you're saying and you're right, turbo cams are different beasts. I've got a twin turbo 69 Camaro I am building and the cam specs are weird compared to the centrifugal motors I've done.
With that said I don't think Sal did turbo spec'd cams in his but I'm not sure. Mine are Stage II Crowers, but to Dante's specs which have more lift than off the shelf Crowers, but less duration and overlap. Hopefully they'll work well, we shall see.
Jody
With that said I don't think Sal did turbo spec'd cams in his but I'm not sure. Mine are Stage II Crowers, but to Dante's specs which have more lift than off the shelf Crowers, but less duration and overlap. Hopefully they'll work well, we shall see.
Jody
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From: Wilton, Ca.
Originally Posted by Frank5L
VT has a set of turbo grinds I'm probably going to try out whenever that time comes for mine.
If I had a "do-over" I'd definitely do turbo grinds. But at the time the motor was built I never imagined a turbo on it.
Jody
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From: Searcy, AR
Originally Posted by LightningTuner
I made 753rwhp with the 76 GTSH and the 3" downpipe. It's not as bad as you think. I went up to a 4" pipe at PTK's advice, and only picked up 50rwhp. Not that I was complaining about 50 rwhp . The 3" will do just fine for most setups.
. The 3" will do just fine for most setups.
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From: The People's Republic of Los Angeles
Originally Posted by camcojb
You're right Tim and if I'd have known this in advance I would have opted for the 4" downpipe. . . .
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From: Wilton, Ca.
Originally Posted by Tim Skelton
My comment was not directed at you, Jody. The issue is why does Pro Turbo even offer a 3" pipe? Why not a 4" for all Lightning kits? Would there be any technical downside to a 4" pipe?
Jody
