b-mod engine

[parrot69777]

From my experience......one of the biggest problems with people when they are switching heads around is......they never change the camshaft to match what they are working with.

Most of the time someone was given a $25 midwest motorsports or JR's #whatever that supposedly won a couple races 20 years ago......and think it's supposed to work with any engine combination out there. Then they blame the heads, carb, intake manifold, etc.

[stock car driver]

From my experience......one of the biggest problems with people when they are switching heads around is......they never change the camshaft to match what they are working with.

Most of the time someone was given a $25 midwest motorsports or JR's #whatever that supposedly won a couple races 20 years ago......and think it's supposed to work with any engine combination out there. Then they blame the heads, carb, intake manifold, etc.

Switching heads to compare like heads on a motor doesnt require changing a cam...

You only change one variable at a time.

[hogracer3d]

I wouldnt have any compression with a 61cc chamber on either motor, both of these heads are in the mid 40cc range

[stock car driver]

You can have them milled and intake face and bolt angles corrected...

[stpmotorsports]

Whatever combo we go with, I will have a camshaft custom ground to the engine. I have done this will all of our engines.
I will be contacting Rocket about fuel. I havent even been able to locate e98 to mix my own in this area, maybe they can tell me of a nearby dealer.
I appreciate all of the opinions and views, if we all had the same thought process, racing would be boring! LOL
But, on the subject at hand. Does the 2bbl carb limit the effective and efficient RPM range, thus favoring the larger displacement? Where does the head size factor in, bigger head-higher RPM? Remember this is for a 2500# car.

[TeamGRT12x]

Sounds similar to the rules I ran under for one show in 2006. I had recently been given a 377 with double hump heads. All Standard stuff, GM Crank, 2 Bolt 400, Worked over Humps and a shelf cam. It ran pretty well. I'd say your heads will be Ok, as this motor was an A-Mod motor that we put a 2 barrel on. You'll want to be sure as you said to have the camshaft fit to the heads and intake along with carburetor and car.

I sure miss when you could run with a $1500 cheap motor!!

[stpmotorsports]

I miss those days too! We are well beyond that already and all I have is a block! LOL

Also for anyone interested, we got the PBM block, it is a World Products block that PBM just machined there logo on. It has WORLD cast right into it. Very nice looking block and the builder is very happy with it after checking things out.

[hogracer3d]

I'm thinking I could go $900 cash, if they got titanium valves and a Jesel shaft rocker package, as long as they aren't over a race or two old, and they aren't used to going 2 seconds slower per lap than the white guys run?

And free shipping, of course...
Dave

[stock car driver]

I'm thinking I could go $900 cash, if they got titanium valves and a Jesel shaft rocker package, as long as they aren't over a race or two old, and they aren't used to going 2 seconds slower per lap than the white guys run?

And free shipping, of course...
Dave

If your budget is that tight, Ill sell you some double humps for $400 or some dart 180/49cc for $650 free shipping. Both contain manley race flo valves and are bolt on ready. Thats the best I can do to help out another racer.

[hogracer3d]

We were on a no port rule, 360 and a gauge 2bbl, but now on any cube, 4 bbl and a G-60

So, Im good with the Tony Barker, Alan Johnson and HRD head work, I do use HVH Super Suckers though, and some Wilson junk........

[LowTechRacing]

If your budget is that tight, Ill sell you some double humps for $400 or some dart 180/49cc for $650 free shipping. Both contain manley race flo valves and are bolt on ready. Thats the best I can do to help out another racer.

Any port work on the humps?

[stock car driver]

Any port work on the humps?

A little touch up but no major porting. I have a add in the classifieds.