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Gunna swap cams on 383/177 set up

740 Views 12 Replies 4 Participants Last post by  ericnova72
I’ve decided I cant help myself and I’m going to swap cams on my Weiand 177 powered 383.

I feel like the current cam, a retro fit crower 238/240 .555/.559 on a 110 lsa, is just robbing power potential and I feel like with almost 20 degrees of cam overlap im getting a lot of exhaust reversion. Plus, im having to really spin the blower to get any PSI out of it.

I know psi is just a measurement of what isn’t getting through the engine, but I would like to spin the blower less rpm and get the same pressure or more.

The two I’m looking at are Howard’s cams but open to other suggestions. Both have an overlap of just 2 degrees.

One is 235/233 .544./.540 on a 116LSA and the other is a 225/235 .525/.536 on a 114LSA.

The motor set up is a fully forged 383 with 200cc runner heads, rings gapped for boost, carb motor in a 95’ Silverado. Curious on opinions?
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· Race it, Don't rice it!
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There is way more to cam timing than just the duration, lift and LSA numbers. Think about the lobe shape and what's happening at the crank position.
Trust the guys who make a great living.....not the joe blow internet know it all.
 

· Race it, Don't rice it!
Joined
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9,756 Posts
Definitely, and I’m inclined to believe the custom cam guys, but understandably they won’t weigh much into whether or not their cam will make more power than the current one. One did say his would make way more power below 4k rpm, which with my current traction issue, may not be a good thing 😂
What would you expect them to say?
"Well, for $800 the best I can do is less than you have now"
 
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