Engine Builders Step in PLEASE
Thread Starter
Drifting
Joined: Jul 2002
Posts: 1,329
Likes: 8
From: Corpus Christi Tx.
Engine Builders Step in PLEASE
So I am getting a LS3 427 short block and want to reuse my low mileage LS1 Heads on it. The Question is which set of ARP head studs do I order the LS1 studs or the shorter LS3 bolts. I believe I need the longer bolts because of head height. Am I correct ???
LS1 Stage 3 Ported, Polished & Coated Heads 853 Casing 66CC
Featured in magazines like GM High Tech Performance, these are our famous Stage 3 Ported, Polished and Coated heads that have produced many 450 + RWHP cars. They start out as 241 or 853 castings (original LS1 heads). We totally disassemble, clean and prepare them for a complete porting, polishing and coating. When finished, they are ready to bolt up to your car with new 2.02" / 1.57" stainless valves, and competition valve job
Lift Intake Exhaust
.10 87.5 67.2
.20 158.7 108.2
.30 230.5 162.0
.40 264.5 193.4
.50 286.3 217.8
.55 292.5 225.9
.60 296.2 234.7
.65 303.1 238.5
LS1 Stage 3 Ported, Polished & Coated Heads 853 Casing 66CC
Featured in magazines like GM High Tech Performance, these are our famous Stage 3 Ported, Polished and Coated heads that have produced many 450 + RWHP cars. They start out as 241 or 853 castings (original LS1 heads). We totally disassemble, clean and prepare them for a complete porting, polishing and coating. When finished, they are ready to bolt up to your car with new 2.02" / 1.57" stainless valves, and competition valve job
Lift Intake Exhaust
.10 87.5 67.2
.20 158.7 108.2
.30 230.5 162.0
.40 264.5 193.4
.50 286.3 217.8
.55 292.5 225.9
.60 296.2 234.7
.65 303.1 238.5
Last edited by ICUALL; Nov 2, 2010 at 10:05 PM. Reason: Highlight the question
Thread Starter
Drifting
Joined: Jul 2002
Posts: 1,329
Likes: 8
From: Corpus Christi Tx.
So GM is Wrong ?
I understand they will actually fit and work just not sure what kind of performance I will Get. From GM - The 6.2L engines (LS3, L92, etc.) can use any head except for the LS7 and C5R, while the 7.0L LS7 and C5R blocks can use any LS-series head
I am retaining my Heads so I can run the 112 Maggie I also have. I plan to upgrade the heads & Maggie at a later date. $$$$ won't permit it now, but had to replace the block because of a broken Crankshaft that took out the pilot bearing and slave cylinder.
I am retaining my Heads so I can run the 112 Maggie I also have. I plan to upgrade the heads & Maggie at a later date. $$$$ won't permit it now, but had to replace the block because of a broken Crankshaft that took out the pilot bearing and slave cylinder.
Last edited by ICUALL; Nov 2, 2010 at 10:03 PM.
Former Vendor
Joined: Feb 2010
Posts: 643
Likes: 0
From: Sioux Falls SD
you'll have some shrouding but it's certainly possible. I have LS1 heads on an LS7 block using ARP Studs, but unfortunately I don't know if they're a special length.
As for power, I have over 600 at the crank with a tiny little cam (230/227 .521 int .571 ex)
so you can make some ponies with ls1 heads on a bigger bore. I think with the newer heads out there you're leaving a lot on the table, but you realize that, and I understand the $$.
As for power, I have over 600 at the crank with a tiny little cam (230/227 .521 int .571 ex)
so you can make some ponies with ls1 heads on a bigger bore. I think with the newer heads out there you're leaving a lot on the table, but you realize that, and I understand the $$.
Race Director
Joined: Sep 2005
Posts: 11,060
Likes: 291
From: Pasco WA
This isn't true. It's just they're not the best for a larger bore. It's not like you have the 4.125" bore of a 427, using a LS3 stroker. You CAN use your present heads, but I think you'd do better off doing what WKCMD advised. You can get a pretty penny for your worked LS1s which'll offset the cost of L92s. I'd get worked L92s, like stg2 from a vendor, depending on what you're planning on for an intake. You have a few options.
