Anyone running F/I Ltx w/solid roller cam?
Thread Starter
Instructor
Joined: Oct 2004
Posts: 247
Likes: 0
From: Montanja Noord Aruba
Anyone running F/I Ltx w/solid roller cam?
I need some advice from people(or know someone) running solid cams in their blown Ltx engine. I did a search but came up empty. It doesn't need to be streetable.
I'm currently running a 383 with a 230/242-.544/.576 hydraulic roller cam with the TPIS/AFR head. I also want to change these heads for either the 210cc comp. AFR heads or the 227cc comp AFR heads. But I read that for the 227cc heads there are 'more' things to be changed. Any one knows what these 'things' are?
OK...thanks....
I'm currently running a 383 with a 230/242-.544/.576 hydraulic roller cam with the TPIS/AFR head. I also want to change these heads for either the 210cc comp. AFR heads or the 227cc comp AFR heads. But I read that for the 227cc heads there are 'more' things to be changed. Any one knows what these 'things' are?
OK...thanks....
Melting Slicks
Joined: Mar 2002
Posts: 3,108
Likes: 126
From: S.L.C. UT
The biggest thing would be the .050 offset rockers. Other than that, it shouldn't be a big deal.
As far as running a solid roller on a LT/X motor, I don't see it being a big deal. They are so close to a first gen, it shouldn't be a problem. And with their reverse cooling, you can usually run more compression. I did a 396 LT4 with 12.2 compression, a 230/236 114 lsa cam, and it runs fine on pump gas (91 octane here), and will run a 175 shot of nos also on pump gas. But we are 6000-9000ft DA, and we can run more compression up here in our thin air.The LT/X reverse cooling was a good idea, the heads get cooled before the block, which is a bonus in preventing predetonation.
One last thing would be the need to flycut the pistons. But that depends on how aggresive your cam is, and what pistons are in it right now. Alot of the upper end pistons JE ect, have generous valve releifs that probably wouldn't need flycutting.
As far as running a solid roller on a LT/X motor, I don't see it being a big deal. They are so close to a first gen, it shouldn't be a problem. And with their reverse cooling, you can usually run more compression. I did a 396 LT4 with 12.2 compression, a 230/236 114 lsa cam, and it runs fine on pump gas (91 octane here), and will run a 175 shot of nos also on pump gas. But we are 6000-9000ft DA, and we can run more compression up here in our thin air.The LT/X reverse cooling was a good idea, the heads get cooled before the block, which is a bonus in preventing predetonation.
One last thing would be the need to flycut the pistons. But that depends on how aggresive your cam is, and what pistons are in it right now. Alot of the upper end pistons JE ect, have generous valve releifs that probably wouldn't need flycutting.
Last edited by tpi 421 vette; Mar 10, 2009 at 02:23 AM.
Instructor
Joined: Nov 2005
Posts: 207
Likes: 34
From: raleigh N.C.
the brodix 227 heads have standard valve spacing but you would have to change or modify your intake.
I ran the comp cams solid roller blower cam in my turbo SBC.
it wasnt optimal for the turbos but I am saving it in case I ever build a blower engine. at 255/262 I really had to spin it to make it work.
probably better suited to blown drag only, and more converter.
I'm having good luck with the same set of crower lifters on both cams.
just make sure you have enough valve spring for the rpm and boost.
I ran the comp cams solid roller blower cam in my turbo SBC.
it wasnt optimal for the turbos but I am saving it in case I ever build a blower engine. at 255/262 I really had to spin it to make it work.
probably better suited to blown drag only, and more converter.
I'm having good luck with the same set of crower lifters on both cams.
just make sure you have enough valve spring for the rpm and boost.
Thread Starter
Instructor
Joined: Oct 2004
Posts: 247
Likes: 0
From: Montanja Noord Aruba
The biggest thing would be the .050 offset rockers. Other than that, it shouldn't be a big deal.
As far as running a solid roller on a LT/X motor, I don't see it being a big deal. They are so close to a first gen, it shouldn't be a problem.
One last thing would be the need to flycut the pistons. But that depends on how aggresive your cam is, and what pistons are in it right now. Alot of the upper end pistons JE ect, have generous valve releifs that probably wouldn't need flycutting.
As far as running a solid roller on a LT/X motor, I don't see it being a big deal. They are so close to a first gen, it shouldn't be a problem.
One last thing would be the need to flycut the pistons. But that depends on how aggresive your cam is, and what pistons are in it right now. Alot of the upper end pistons JE ect, have generous valve releifs that probably wouldn't need flycutting.
I ran the comp cams solid roller blower cam in my turbo SBC.
it wasnt optimal for the turbos but I am saving it in case I ever build a blower engine. at 255/262 I really had to spin it to make it work.
probably better suited to blown drag only, and more converter.
I'm having good luck with the same set of crower lifters on both cams.
just make sure you have enough valve spring for the rpm and boost.
it wasnt optimal for the turbos but I am saving it in case I ever build a blower engine. at 255/262 I really had to spin it to make it work.
probably better suited to blown drag only, and more converter.
I'm having good luck with the same set of crower lifters on both cams.
just make sure you have enough valve spring for the rpm and boost.
Melting Slicks
Joined: Mar 2008
Posts: 3,022
Likes: 3
From: Chandler Arizona
if you want to run the solid roller (and as you stated, you want more rpm) then the shaft mount would be a more "ideal" valvetrain combo. Otherwise, you should stick with hydro cam, and "traditional" valvetrain.
I too am considering a solid roller cam for the engine i will eventually build. But i was also planning on running a shaft mount rocker combo.
still split between going "all out" 396, or sticking with the traditional 383 cubes... i find myself loosing sleep over 13 cubic inches, LOL
I too am considering a solid roller cam for the engine i will eventually build. But i was also planning on running a shaft mount rocker combo.
still split between going "all out" 396, or sticking with the traditional 383 cubes... i find myself loosing sleep over 13 cubic inches, LOL
Melting Slicks
Joined: Mar 2008
Posts: 3,022
Likes: 3
From: Chandler Arizona
when i talked to TPIS, Jim told me he runs a solid roller in his f-body LT-x engine. He did mention that adjustment might be necessary, but to what extent i don't know... he hasn't even put 5,000 miles on that combination (and hasn't needed adjustment thus far).
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
