When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Just curious what the forum consensus is on this cam grind. It's going in my 63 Chevy II wagon sbe ls2/t56 with a 3.90 rear. I'll be using a Fast 102 with a ported stock LS2 throttle body.
May have too much dynamic compression there - I calculated 9 to 1 dynamic (pump gas you want 8.5). The intake valve closes at 72 (47+25) degrees which is a little early for that compression you like to see 78-80 at 12 to 1. That being said I think the cam would work Great on an engine of that size. It will have a nice lope with not too much overlap - 7 degrees (231+238)/2 - (114 * 2) ---- 235 -228 = 7. I run 12 to 1 on my 454 and it just makes it on pump gas with 21 degrees of timing - I close at like 79 degrees (8.45 dynamic). I was using the wallace racing calculators for this. Some people poo-poo the dynamic compression ratio but I am just pointing it out here and it was fairly accurate on mine. I run a 246/258 298/310 on a 114. My engine is bigger (6.0 vs 7.4 liter) so the cam needs to be bigger too. That cam would be way too big for the 6.0 liter on a street car. I like your 3.90 gears that will help. I like the cam you just may need to look into this compression thing if you are a pump gas guy especially if you only have 91 in your area.
93 octane is plentiful here and I'll be mindful of the quench. I'll be using a .036 Cometic head gasket. In the event of a road trip I'll keep stocked up on octane booster.
Last edited by showdog75; Sep 13, 2020 at 08:42 PM.
Not yet Ryan, hopefully sooner than later. I'm a bit intimidated by the Johnson limited travel lifters setup. Had a really smart guy here tell me I may end up with 8-10 different length pushrods, ugh.
I have Johnson lifters just measures for them two weeks ago and I had 4 different sizes. That’s due to my block more then anything. I had all the same length intakes on one side and 5 thousands shorter intake pushrods on the other side of my engine. My block needed to be decked a little more on one side then the other to perfectly square it up. That’s where the 5 thousands difference in length from side to side comes from. The same was for the exhaust pushrods. One length on the one side a little shorter on the other side of the engine that was decked more. I don’t think it has to do with the lifters more of the head/block and valve in head locations. Johnsons makes a great lifter.
Makes me curious about the Comp Cams adjustable pushrods. Anyone use them? I used them in hot rod Harley's for years and they have way worse valve train geometry than a LS and they worked just fine.
Makes me curious about the Comp Cams adjustable pushrods. Anyone use them? I used them in hot rod Harley's for years and they have way worse valve train geometry than a LS and they worked just fine.
They are expensive, but look promising. Would be a super quick way for you to get this thing buttoned up, vs having to measure, order, wait on a vendor, then wait for FedEx to botch the delivery, etc. I’ve been waiting for someone here to use the Comp pushrods and report back with info/data. I say go for it.
My MMS 223 heads ended up at 61.5 cc's. Tony put in bigger hollow stem intake valves. Will be running a MMS ported Fast 102 intake with a ported silver blade ls2 throttle body. Yella Terra 1.8 ratio roller rockers with the Johnson limited travel axle oiling lifters. Any guesses on hp and torque given a proper tune? T56 with a 3.90 rear. Exhaust may be my limiting factor. Headers are 1 5/8" primarys with 2 1/2" through Borla ProXS mufflers.
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.
Cam expectations 
