Bad N Black

I have a cam in now. I would like to go bigger. The heads are LS1 heads milled .015 with 2.02in & 1.59ex valves. The cam I have now is 224/224 563/563 114.9 lsa. I would like to replace the cam with SLP 236/236 590/590 112 lsa. Thanks

MountainMotor

iTrader: (2)

When you start going very big you have to watch your P/V clearance. You could have the pistons flycut if need be.

dirty2kTA

iTrader: (3)

personally i dont care slp products when it comes to internals or blocks, but there is formula that i will allow to know for sure on the p to v clearance. if your current springs are weak then you will want the replace them because even if the cam of your choice has clearance its possible to still hit a valve in the high rmps due to the fact of a weak spring not be able to pull the valve up as it should.

GuitsBoy

iTrader: (4)

I have a moderate cam, 232/234 .595/.598, stock valves, and heads milled .040. I had to flycut. Notching the pistons about .090 yeilded me about .165 P to V clearance.

RALLDU

Have milled heads, with 575 590 cam, oversized valves and works fine. no problems here

KGSloan

it's the duration that is the problem with p/v clearance, not lift.

with those cam specs and head specs you would have to check, and my guess is you would need to flycut. my $.02

Bad N Black

Could you tell me what your duration is?

dirty2kTA

iTrader: (3)

old set up:

y1 cam .595/.608 234/240 113
mti stage 2 5.3 liter heads
stock cube
no problems whatsoever until the nitrous got a hold of it.

Bad N Black

How big were your valves? Did you milled the 5.3 heads?

Quik

iTrader: (7)

how about the TV2 112 with flat tops and milled .020 heads? im looking to bump my SCR to 11.4 and figured if i can cut the heads that much i should be about that ratio im looking for. will i have to fly cut them

allngn_c5

iTrader: (3)

Had to flycutt my pistons to achieve proper PVC. Good luck on your future setup.

RALLDU

CAM SPECS ARE

228/236 @ .050

575/590

112 lsa

MANLEY STAINLESS 2.02/1.60 VALVES

Bad N Black

Thanks for the info.

dirty2kTA

iTrader: (3)

2.02/1.55 they were not milled

Bad N Black

Thanks again.

waterbug1999

iTrader: (3)

I notched my pistons .085" with my current set up (.040" gasket). Not hard to do at all.

Bad N Black

What are the specs on a g5x3 cam. I would love to notch the pistons. But that would require me to remove the heads. I can't do the heads again.

waterbug1999

iTrader: (3)

Its bigger then the one you mentioned in your 1st post. If I were you, I would make some phone calls to some of the vendors here on this site and ask and see what they say. They might have done something close to what you are wanting to do. Im sure at the end, they will say it might be close and just check it. But to check it, you would have to pull your heads, which you stated you did not want to do. Thats the only "sure" way.

Bad N Black

Thanks waterbug and to everybody here at the greatest web sight in the world.

orangeapeel

iTrader: (18)

It is a combination of everything that makes up valve events that determine whether or not you are going to have a clearance issue. Not based on lift/duration alone.