Whittaker

I had a cam company spec out a cam for my 383 LT1 street motor and the LSA is 110. I have used this company before and have had good luck with the. But I know in the past the I had always heard the LSA needed to be in the 112-114 to better work with EFI.

The cam specs are

With 1.6 ratio rockers

Intake lift is .564 and Exhaust is .560
Duration @ 50 is Intake 238 and Exhaust is .244

LSA 110 with 4 degrees advance (so the LSA would be 106)? Or since it is advance +4 is it 114?


Help

kierstyn

iTrader: (5)

I dont think you will have to worry about the lsa guys are getting cams spec with 105 to 108 lsas for all motor cars and even small shots of nitrous. The 110 should work good in the 383 and even better with nitrous.

StealthFormula

iTrader: (35)

Essentially all of the off-the-shelf stuff for LT1's come on a 112lsa or 114lsa. They are both very wide I would say too wide for N/A since the LT1's seem to prefer tighter lsa's. My custom grind has a 107lsa and most custom grinds you see will be on something ranging from that to a 110lsa.

ss.slp.ls1

iTrader: (36)

Sounds like a nice cam to me, I wouldn't worry about that LSA at all.

vanilla89

iTrader: (8)

That's what I was thinking..

My cam is a 236/236 106lsa. So I think you will be ok.

AChotrod

iTrader: (17)

mines a LE 230/236 108lsa no probs

Puck

iTrader: (17)

NA LT1s love the tight LSA. I have a 240/240 108LSA "LE4" cam that I was going to run in my 383, but may sell it to go bigger since I will be running better heads then planned . Don't be afraid of nitrous as well - you don't need a specific nitrous cam unless you are spraying over ~250hp. A 150 shot will be fine on a 110LSA, and as you can tell already will have no problems working with EFI.

James Montigny

iTrader: (13)

"Advancing" changes ICL (intake center line) not LSA (lobe separation angle)
It's not uncommon to see +2 or +4 on N/A grinds.
110 is nothing to be affraid of .. sub-110 cams are quite common anymore.

myltwon

iTrader: (1)

pretty much already covered but yes most off the shelf cams that you see from comp and the like are 112 (cc503, LT4 Hotcam, GM847, cc306, etc) 113 (Comp XFI grinds) and 114 (cc305, etc) LSA, but the average AI or LE custom cam usually has a 108-110 LSA, since these guys are making some of the best n/a power for LTx motors then maybe there is reason for their logic.

also like puck said, too many people worry about having a "nitrous cam" when they only plan on running a 100 or 150 shot.

plus wider LSAs sound cooler