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Author Topic:   what stock heads to run?
powerglides
Dirt Full Roller

Total posts: 69
posted March 15, 2002 09:43 AM
My rulebook states no hi po heads and it lists all the good ones that I cant use. So I am absolutely limited to big chamber heads or 305 heads. my engine rules are, Holley 4412, 2 barrel cast manifold, flat tops, cast iron log exhaust manifolds, any hydraulic cam. I run a slick 1/3 mile track, with #3150 car, on 8" diamondback tires.

What heads will give me the best performance with no porting?


uforacing51
Dirt Freak

Total posts: 349
posted March 15, 2002 12:54 PM
The trick is use something that APPEARS stock, otherwise use the big chamber or 305 heads. List the ones you can't run. I liked the 041 casting 305 heads, but I'll bet you can't use them.

LUBEGUY07
Dirt Maniac

Total posts: 156
posted March 15, 2002 05:48 PM

IF YOU HAVE TO RUN UNDER IMCA RULES FOR HEADS THEASE ARE THE BEST FLOWING HEADS 441 487 487X AND 993. I PERFER THE 487X IF U NEED SOME OF THEASE HEADS I HAVE A BUNCH OF THEM FOR SALE

Gofastturnleft
Dirt Roller

Total posts: 20
posted March 17, 2002 06:50 PM
Alot of people around where I race run the 882 heads they are supposed to be one of the if not the best flowing low comp. head

powerglides
Dirt Full Roller

Total posts: 69
posted March 18, 2002 06:10 AM
OK here are the heads I can't use. Bow tie, any center bolt (i.e.vortec), 492,461,291,462,290,292,186,441,041,260,520,370,040,461x. I have to use flat top pistons.

Flatlander
Dirt Freak

Total posts: 310
posted March 18, 2002 10:37 PM
881 have big valvea but 76cc624 big valve 76cc

[This message has been edited by Flatlander (edited March 18, 2002).]

fastguy
Dirt Newbie

Total posts: 2
posted March 19, 2002 03:27 AM
Use the 040 head. It's similar to the 041 but it may be hard to find.

racer17j
Dirt Forum Champ
Total posts: 1565
posted March 19, 2002 10:54 AM UIN: 54865418
we run under simular rules most guys run 882 i have never had any trouble with them as long as you don't get them too hot

Lumpy Smith
Dirt Roller

Total posts: 11
posted March 20, 2002 10:05 PM
882's block off the heat riser port. 882's have two ports . might help in keeping the heat out of the manifold/carb area.

powerglides
Dirt Full Roller

Total posts: 69
posted March 21, 2002 10:09 AM
Do you guys run big chamber heads with Flat tops and cast iron log exhaust manifolds

racer17j
Dirt Forum Champ
Total posts: 1565
posted March 22, 2002 01:21 AM UIN: 54865418
yes glide we all run with stock exaust i run ones off a 70's pickup i had a set of centerdumps but we can't run them
and lumpy i do have them blocked off i have been told they crack pretty ez if you let the motor get hot alot

NYhick
Dirt Forum Racer

Total posts: 82
posted March 23, 2002 01:54 PM
Powerglides, I noticed your list of illegal heads didn't include the 414's. If these are legal for you, they will give you tons of power. They are from Z-28/Corvett LT-1 years 64-70. They have 2.02/1.60 valves and 64cc chamber. They supposedly put out 360 HP. Thes are good heads, and I will be surprised if they are legal given the others on the list.

powerglides
Dirt Full Roller

Total posts: 69
posted March 25, 2002 06:32 AM
Hey I'm a New York hick too Rochester area

NYhick
Dirt Forum Racer

Total posts: 82
posted March 25, 2002 07:49 AM
I am well east of you in Mayfield. A little north of Amsterdam. I will race at Fonda Speedway this year, just off exit 28 of Thruway.

Robcat
Dirt Roller

Total posts: 22
posted March 25, 2002 06:07 PM
Your list also did not list 493! They are a 1969 Vette head that came with 202 valves, and are angle plug!!!!! They can still be purchased from your local Chevy dealer. I would ask the tech guy first, or show up with your receipt and hope he lets you run the year!

It must be a NY thing! Baldwinsville, just north of Syracuse here!

johnb7
Dirt Roller

Total posts: 5
posted April 10, 2002 12:01 AM
GUY's YOU CAN'T JUST BLOCK OFF THE HEAT RISER PORTS ON A SMOG HEAD ! you have to fill it with aluminum foil. i mean pack it in there with a punch.it takes 2 turkey pans like you use when you cook your turkey at thanksgiving.
1 for each head. when you use a piece of metal at the intake gasket to block off heat risers you have only wasted your time.
(LOOK AT YOUR HEADS) the heat riser crosses over into the next cylinder and contaminates it. pack those heat risers tight so the gases wont go to the cylinder beside it.this takes about two hours to do.you will see a difference . the engine will get alot louder too ! if you take a look at some of the pre-smog heads you will notice that blocking off the heat riser at the intake gasket fixes them because they are only connected to one chamber.smog heads are connected.pack them full !after your done packing,use some liquid and pour it into the port and make sure you have it sealed. thanx. and for you guys that this may not be leagl in your class put the piece of metal back on at your intake gasket. and when your protested cut the intake gasket loose from the intake and leave it on the head. if you will notice in a protest 9 times out of 10 they only look a chamber on the end of the head.because it is the easiest to get to.if they pull the valves? (so what) the two center cylinders are the ones you have to keep the tech man out of. thanx.

ford5
Dirt Freak

Total posts: 298
posted April 10, 2002 07:31 AM
ok, heres a trick ive done for yrs. it even works on chevy heads... lol.. take the exhaust valves out where the exhaust crossover is make,a cardboard dam that fits the contour of the inner chamber, pack the dam in there with modeling clay or the equivilant, then stand the head up on its side ,level, melt aluminum, and pour it in the exhaust crossover hole till its full , let cool, then remove dam and touch up the hole with dremel and 'presto' you have a professional looking plug.

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