Lobe seperation???benenati379 said:I'm not too sure on this, but from reading LS1 tech here and there I think the biggest is a TR224 or the cam that Tony sells with the AFR205s (220/224 581/581). Anything bigger and you'll need a really good tuner to help pass smog. Again, just what I have heard. FWIW
Rob,Rwdyryd said:As far as the sniffer test I've gotten a few opinions from here that say a 224/224 on a 114 ls is the biggest. I'm going to try go a little bigger, my car is scheduled to have a 226/230 113 ls the week of 8/1. The tuner is confident that I will pass the sniffer, hope to find a blind smog tester when I get the car smogged in 4 yrs :rofl: I'll post hp # when it's finished, but won't know about smog for quite a while.
This will be interesting to see. We can compare driveability afterwards. Youre sounds beefier than mine, so lets see what Rick is able to do about it.
On a 114. The 112 is borderline passing. Don't take my word as gold though. I would talk to Andy and some other tuners to get some real world experience. I know Tony at AFR has some experience in this area.Polar Bear said:Lobe seperation???
I emailed Andy a few hours ago.
BLEUBYU said:Grim, I am thinking about a 427 build and an appropriate cam to work with AFR 225 heads. I don't live in Cali, we have a bit less restrictive emissions in Va, 49 state? Any cam suggestions?
Steve Tillman said:With large cu. in. like that 427 you can get a lot more agressive than with the 346 cu. in. displacement engine..duration in the 240's will work with lift in the .600 + ...big engines like the big numbers on the cam.. :yeadog:..I run a 233\233 .595\.595 on a 112 LSA in my daily driver (346 cu in.)
Thanks for the info!! I have talked to Steve Demarjian in Cali about doing a dry sleeved LS2 - he has just completed dev of that system. He is supposed to be the best in the biz at sleeving motors. Chatted with Tony Mamo at AFR about a premium valvetrain config on their 225 heads. he also mentioned using FAST system. Crank, rods, pistons still being looked at - perhaps Lunati Pro Billet or Callies and JE for the forged pistons. Cool trick with the rockers - may look into that one!Grim Reaper said:Yes, you have to feed that puppy. The biggest advantage with the 427, is the tolerances are much better on aftermarket setup and they are usually, "freasher," being newer. However, on the flip side it is 20% more motor and more total emissions.
I would go with MTI R1 Cam. .575/.578 232/236 on a 114. This will pass easy on 427 and you 500 at wheels with no Fast setup.
We are currently putting that cam back in my 429 and running a higher lift 1.85 roller rocker. So about .626/.629 with about eight degrees more duration. Bet it will still pass. However, I can put the put the stock 1.7's back on for smog day. Just in case. Sneaky.
I should have an article published, in one the mags, on the results in about sixty days.
P.S. I should have noted earlier, that I got that 429 to pass at 1/8th with no mufflers (It had a Borla XR racing exhaust on).