302 Ford or 302 Chevy

[ibmorjamn]

the cost would be a big issue for me and I bet that Chevy gets the nod on cost effective HP.

[mike walsh]

the cost would be a big issue for me and I bet that Chevy gets the nod on cost effective HP.

I dunno! Without starting a cat fight, I have built 351 "boss," motors pretty cheaply. Cleveland heads on a windsor is all it was.

[ibmorjamn]

the cost would be a big issue for me and I bet that Chevy gets the nod on cost effective HP.

I dunno! Without starting a cat fight, I have built 351 "boss," motors pretty cheaply. Cleveland heads on a windsor is all it was.

right, there was a thread recently about "clevor" conversions. you can do the same and make a boss 302 as well right ?
it's all what you like. I all ways liked fords but I know back in the day and even now I was out numbered 2:1. or 3:1 lol

[4speed390]

well my opinion is not professional as some of these other guys are. but I have to ask the question, do u mean a 302 windsor or boss? Cause the boss used a cleveland style head, which, as most know were amazing heads and have been argued to be the basis of many of the pro stock heads people have used. so its a tough decision.

[rustang]

The Boss heads are capable of flowing 325 cfm without alot of work. (I actually did a set that flowed 325, and it was a backyard deal). I've heard of factory boss (or 4V cleveland heads) worked to get as much as 360 cfm.

That's alot of potential from a factory head!

[ibmorjamn]

that is a lot of cfm but are the cast factory 4v heads hard to come by these days?

[347guy]

that is a lot of cfm but are the cast factory 4v heads hard to come by these days?

there all over

[RL]

With the price of a Chinese Clevo Ford head it's better than the factory CI.
Friend just made 700hp on the weekend on a 400cu Ford with Chinese heads but on race gas.
Made 600hp on a 400cu Ford with filled 4V Clevo heads about 6 months ago on pump gas.

[pdq67]

Please, lets get back on topic!!

302" and up to .060" overbore Ford and Chevy small block engines with wedge chambered heads!

pdq67

[n2omike]

The Ford DOES have some significant advantages at that displacement. Both engines have heads that will easily sustain any rpm you care to spin 306 ci up to. That being said...

1. Ford engine is smaller and lighter, so the car will handle better and be faster.
2. Ford crank and rods are smaller/lighter, so it will accelerate faster.
3. Ford pushrods are shorter and stiffer, which will make the valvetrain more efficient.

The Ford is more tailor made for the smaller displacement... and all else being equal, will outrun the Chevy for the above reasons.

[Walter R. Malik]

Things in the engine department and speed parts availability have changed a bunch since 2009 when this thread originated.

[CGT]

The Ford DOES have some significant advantages at that displacement. Both engines have heads that will easily sustain any rpm you care to spin 306 ci up to. That being said...

1. Ford engine is smaller and lighter, so the car will handle better and be faster.
2. Ford crank and rods are smaller/lighter, so it will accelerate faster.
3. Ford pushrods are shorter and stiffer, which will make the valvetrain more efficient.

The Ford is more tailor made for the smaller displacement... and all else being equal, will outrun the Chevy for the above reasons.

I agree, and also due to the shorter deck height, the Ford could end up with an intake manifold better designed to run at very high rpm.

[steve316]

GM has a low & med deck block that would make an excellent platform; most comp engines start at 8.200 deck height and deck block down to 8.100. The amount of power depends on your budget and application not so much as ford or chevy.

[GARY C]

The Ford DOES have some significant advantages at that displacement. Both engines have heads that will easily sustain any rpm you care to spin 306 ci up to. That being said...

1. Ford engine is smaller and lighter, so the car will handle better and be faster.
2. Ford crank and rods are smaller/lighter, so it will accelerate faster.
3. Ford pushrods are shorter and stiffer, which will make the valvetrain more efficient.

The Ford is more tailor made for the smaller displacement... and all else being equal, will outrun the Chevy for the above reasons.

I agree, and also due to the shorter deck height, the Ford could end up with an intake manifold better designed to run at very high rpm.

It's possible that the 20 degree Ford head could have a slight advantage over the 23 degree Chevy as well.

[steve316]

All-Pro makes some 23 degree heads that flow in the 380's with a 2.180 valve; may want a smaller valve for a small bore motor.