Vortec/LT4/LS1 head building question
10-19-2006, 04:47 AM
#1
TECH Fanatic
Thread Starter
iTrader: (7)
Join Date: May 2003
Location: Valley Center KS
Posts: 1,602
Likes: 0
Received 0 Likes
on
0 Posts
Vortec/LT4/LS1 head building question I'm looking at building a 1st gen 350 setup here in the future and have a few questions that I can't find the info to confirm what I believe.
Basically I want to use the "new" vortec bow tie heads. I'm thinking the LT4 valves will work good (2.00 and 1.55) which is what the heads come machined for. Then I want to run comp cams 918 springs.
So I have a couple of questions that I need confirmed.
First, I have to run the correct retainers for the 918s.....either comp cams 788(Ti) or 787(steel). Then some valve locks. But these are for 11/32" valve stems....are the LT4 valves 11/32"? Found the answer...yes LT4 valves are 11/32"
I need to run some valve seals. Will the standard LT4 (GM # 10212810) work fine? Pretty sure it will.
Then, finally, do I need to run some kind of valve spring seats/cups/ or whatever in order to run the 918s? From what I've found the answer is no, as the springs, at the base, are essentially the same size as standard SBC springs (1.290")
Hopefully I'm running along the right lines here and everything will work together well and I'll have a killer SBC.
Thanks
Basically I want to use the "new" vortec bow tie heads. I'm thinking the LT4 valves will work good (2.00 and 1.55) which is what the heads come machined for. Then I want to run comp cams 918 springs.
So I have a couple of questions that I need confirmed.
First, I have to run the correct retainers for the 918s.....either comp cams 788(Ti) or 787(steel). Then some valve locks. But these are for 11/32" valve stems....are the LT4 valves 11/32"? Found the answer...yes LT4 valves are 11/32"
I need to run some valve seals. Will the standard LT4 (GM # 10212810) work fine? Pretty sure it will.
Then, finally, do I need to run some kind of valve spring seats/cups/ or whatever in order to run the 918s? From what I've found the answer is no, as the springs, at the base, are essentially the same size as standard SBC springs (1.290")
Hopefully I'm running along the right lines here and everything will work together well and I'll have a killer SBC.
Thanks
Last edited by Ackattack1; 10-19-2006 at 05:04 AM.
