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08-27-2014, 05:37 PM #11
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08-27-2014, 05:55 PM #12The FABRICATOR!
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- Chris
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- 1985 Monte Carlo SS
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Chris
1985 Monte Carlo SS
Mods: 9:1 383 LT1, Ported Trick Flow heads, D1SC Procharger, 4L80E, 3.50 9"
Check out the M122 MCSS build thread here!
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The Following 3 Users Say Thank You to firebird_1995 For This Post:
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08-28-2014, 03:03 AM #13
I just found some dish tops for sale locally that would get me to 8.5 compression. How much more boost could I try and squeeze out of it with them? They are forged ross pistons -19cc dish. I will also be using forged 5140 6 inch rods with a forged gm crank. Would you guys recommend anything that I should know about turboing lt1s or things I could do to improve the set up. I am planning on running 2.5 intercooler piping. I think that should be sufficient, fill me in. You guys are all great for the ltx community! Thanks, it really does help a lot!
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08-28-2014, 08:34 AM #14
It will be a dog out of boost, I would not go that low unless you plan on +20psi
Correlation does not imply causation.
Una salus victis nullam sperare salutem
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The Following User Says Thank You to shownomercy For This Post:
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08-28-2014, 09:51 AM #15The FABRICATOR!
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- Chris
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My 355 build was 8.5:1 but the roots blower negated any low end doginess. There was really no such thing as "off boost", it was either idling or balls out so I can't help you in that aspect. What size combustion chambers/heads are you running? Has the block been decked? Also, the 5140 rods are no stronger than stock ones, so look into a 4130 rod.
Chris
1985 Monte Carlo SS
Mods: 9:1 383 LT1, Ported Trick Flow heads, D1SC Procharger, 4L80E, 3.50 9"
Check out the M122 MCSS build thread here!
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08-28-2014, 10:07 AM #16
I just now saw this. That cam would work pretty well imo.
I'm 8.5:1, its not horrible out of boost but I'm an auto and a 383. I do plan on bumping it to 9.5:1 this winter, e85 will like it better I bet.
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The Following User Says Thank You to Ryan Stout For This Post:
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08-30-2014, 01:56 PM #17
2.5 or 3 inch cold side piping? Personal preference or actual gains to be had?
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09-04-2014, 07:28 AM #18Correlation does not imply causation.
Una salus victis nullam sperare salutem
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09-15-2014, 12:55 PM #19
At what rpm/hp/boost would the 2 bolt mains start to be a weak point? They will have studs. And for those that have done the 4 bolt splayed mains, how much did that end up costing you? Thanks for all the help. I've been gathering parts slowly.
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09-16-2014, 07:14 AM #20Lurker
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- Guillaume
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The 4-bolt conversion is worth it IMO, as you always want more power and it's pretty easy to increase boost with a turbo. Might as well have the 4 bolt caps in there
1989 Mazda RX7 Turbo II, 357ci LT1, AI TFS CNC heads, Garrett GTX4708R, Ford 8.8" SAS, TH400. (Current project)
1995 Chevy Caprice, Twin turbo 357ci LT1, 9.96 @ 141.2 mph (sold)
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