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08-03-2013, 01:27 AM
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#1
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I, Vettezuki
Join Date: Feb 2006
Posts: 14,754
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Gain from lifter swap in LS?
If I have to pull the motor to do anything with the cam or bearings, I'd probably take that time to do other work. Lifters are one possibility. Back in the day LS guys were swapping fro Caddy racing lifters and saying they were getting a substantially freer spinning engine and something like 15HP AIR. MMmm, is that BS and what are the nice lifter options these days for and LS1?
I've pretty much decided that for this engine, I'm going to stay NA and 346ci, but target as cose to 440WHP as possible. I'm at 390~ with stock manifolds and substantial back pressure. I'm thinking hybrid Tri-Y/LTs from Jammer, lifters, rockers, drop compression a half point with a cometic HG maybe, and retune at Cunningham. All together I figure about $3,500. This isn't going to happen soon, but if I have to pull the motor, I might do at least the lifters now.
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08-04-2013, 06:07 PM
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#2
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pain's fun, hit me again
Join Date: Sep 2009
Posts: 6,264
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Yes, better lifters are always a good idea. Morel makes just about the best link bar lifter for the pushrod family of engines. About $370 and are good for 8000rpm
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Originally Posted by Bruce Lee
Forget about winning and losing; forget about pride and pain. Let your opponent graze your skin and you smash into his flesh; let him smash into your flesh and you fracture his bones; let him fracture your bones and you take his life. Do not be concerned with escaping safely — lay your life before him
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08-05-2013, 12:47 AM
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#3
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I, Vettezuki
Join Date: Feb 2006
Posts: 14,754
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Thanks. That's less than I would have expected.
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08-05-2013, 09:24 AM
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#4
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pain's fun, hit me again
Join Date: Sep 2009
Posts: 6,264
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I have them in the black engine, purchased them from FTI.
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Quote:
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Originally Posted by Bruce Lee
Forget about winning and losing; forget about pride and pain. Let your opponent graze your skin and you smash into his flesh; let him smash into your flesh and you fracture his bones; let him fracture your bones and you take his life. Do not be concerned with escaping safely — lay your life before him
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08-05-2013, 05:25 PM
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#5
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Internet Tough Guy
Join Date: Jun 2008
Posts: 1,545
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Are you planning on doing anything with the heads? The rectangle port heads flow a lot more than the ls1 cathedral style heads. What about a cam? Let me know I have some shit you may find useful.
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2007 C6 z51 416ci, KW variant III, Wilwood WS6, Traqmate.
2005 F-350 PSD 4x4 DRW Lariat
2013 Mustang GT Grabber Blue, track pack, Brembo, Recaro, 3.73s
2009 Jetta Auto 2.5 liter
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08-05-2013, 07:08 PM
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#6
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I, Vettezuki
Join Date: Feb 2006
Posts: 14,754
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Quote:
Originally Posted by BADDASSC6
Are you planning on doing anything with the heads? The rectangle port heads flow a lot more than the ls1 cathedral style heads. What about a cam? Let me know I have some shit you may find useful.
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Thank you Carlos. It's already a heads and cam package. The Heads were HEAVIILY ported and otherwise modified 4.8L truck heads, which was done a lot back in the late 90s. The cam is the biggest smog cam available TMK. It's a 224/224 114LSA .566 max lift.
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08-05-2013, 07:54 PM
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#7
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Internet Tough Guy
Join Date: Jun 2008
Posts: 1,545
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You could port you TB.
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2007 C6 z51 416ci, KW variant III, Wilwood WS6, Traqmate.
2005 F-350 PSD 4x4 DRW Lariat
2013 Mustang GT Grabber Blue, track pack, Brembo, Recaro, 3.73s
2009 Jetta Auto 2.5 liter
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08-05-2013, 10:56 PM
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#8
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Senior Member
Join Date: Jan 2010
Posts: 1,255
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Fast 90 should do the trick.
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2006 CTS-V
1993 Trooper
1991 Impulse RS
1988 Trooper II SAS
1986 TrooperII (No Rear)
1988 Impulse (dead)
1983 K20
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08-06-2013, 12:00 AM
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#9
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I, Vettezuki
Join Date: Feb 2006
Posts: 14,754
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TB is ported too. Forgot about that. LS6 intake. Basically the air-in side (other than not the greatest intake routing system) is pretty good from TB-> intake -> Heads. The exaust is the next cheap easy power. I have about 3psi(!) backpressure at WOT on those stock manifolds. A good set of headers might be 20+ whp and much more under the curve aif I go with combo tri-y. Yes, 3psi backpressure.
http://www.motorgen.com/garage/showvehicle.php?vid=58
That's why I'm thinking 390WHP -> 430 WHP with good LT/Tri-Y headers, lifters, rockers and tune. Injectors are resized to 32lb and compensated for No. 7 (or No. 8, I forget).
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