Good time to swap cams since my motor is apart for a refresh. Shop thinks I need more exhaust. Current cam was spec'd by Cam Motion and I had other very similar recommendations. Should I change up or stick with this one?

228/236 .630/.635 with 1.8 rockers 114 LSA 110 ICL
ETP LS7 small bore heads.

Just noticed....Original install was +4, but I don't see that on the current build sheet since it was redone after the destroyed valve seals and cracked piston. https://www.performancetrucks.net/fo...-today-471511/

 

I'm not super familiar with the heads. Can you share some details? Runner volume, valve size, flow numbers?

Knowing how extreme the rest of the combo is I agree its not enough cam. Do you know for sure if its advanced at all or straight up?

 

ETP used to have the specs on their site, but since they no longer exist, I think these LS7s are the closest or the same. Mast Motorsports High Performance Powertrain Solutions

Was actually billed for the big bore with titanium/inconel, but received the motor with the small bore with stainless valves. Intakes were replaced with titanium when the motor went back.

There are a lot more 6 bolt head choices now, so I'm thinking about a possible head swap as well.

 

OK flow numbers are in the ball park of the LS3 heads. To that end I agree we can do a lot better with this cam. Especially at the level of boost you run and the capability of 2 1900 superchargers.

I'll shoot you a PM.

 

Fyi ETP are mast heads
Fyi mast doesn't show the true numbers

Example my mast 295 flow close to 390 at 700 lift

My cam is on small side for a 427
235/243 646/664 114+4

Yours is much smaller then mine...something to think about

 

DrX That's close to the cam I am gonna run in mine, and you have a lot more cubes.

 

A lot more cubes and heads that have LS3 flow characteristics.

 

Never thought to check the cam before I dropped the motor off. Just assumed it was installed as previous.

I believe ETP advertised these heads as 380/240.

 

all mast/etp big bore heads have a ls7 exhaust port, the flow numbers are alot greater then that of ls3

his cam profile is far from ideal for the combo

 

I know they are a lot greater, but they also have a large bias in flow to the intake side. Characteristics the LS3 displays too. I was trying to say that a cam that would work great in a cathedral head application wont work as well here.