Off topic engine question

AutoInsane · #1 01-28-2002, 03:50 AM

I know the question is off topic so please accept my apologies. I promise I wont make a habit of this.

I was on a Jeep forum and a fellow was asking questions about building a Ford (waits a sec..looks up.....ok..no lightening ...keep typing) 302 to put into a Jeep. He was thinking about putting GT 40 heads on it. He was told the GT-40 heads were only good for hi end power and also the 302 in general isnt as good for low end torque as the Chevy (did i redeem myself mentioning Chevy?) 350.

Wouldnt you be able to build any engine to be good in either the low end torque range or to be a high end, high horse power engine?

Isnt the cam the true deciding factor and the valve train in general of low end or high end. I do understand the intake manifold also plays a part in range of power.

What would make a design of a cylinder head specific to high end or low end power?

One again sorry for the obsecure question but it is bugging me and I know that I will get a good answer here.

Chevy454 · #2 01-28-2002, 01:10 PM

Head design is a pretty big factor in determining the power band. An example would be the different heads used on the big block Chevy. Big, square port heads are more for top end, where small, round port heads are for low end. I think it has to do with volume?

JoeC · #3 01-28-2002, 01:49 PM

Cyl head port volume and valve size will change your power curve. If you ever see BB Chevy truck heads - the valves look like nails compared to valves in the square port heads.

**PxTx** · #4 01-28-2002, 02:23 PM

Don't over look stoke. Longer stroke engines will make more low end torque when compared to a short stroke engine of equal displacement.

**Stefano** · #5 01-28-2002, 02:47 PM

JoeC,
Some have said the truck head valves look peanut sized compared to the HI-PO BB valves.

DarkoStoj · #6 01-30-2002, 05:43 AM

I'm the guy he is talking about that is planning a V8 swap for my Jeep. I was contemplating wheter I would swap in a Ford 302 out of a Stang or some kind of TPI 350. Whatever I swap in would need to be fuel injected. The fact that the 302 is more of a horsepower motor, rather than top end motor, I am considering a TPI 350. Is there a specific engine I should look for performance wise? Or is there any additional information

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