[BIG E 86]

iv pretty much bought everything but heads
SBC 400 BLOCK
5.7 SCAT PISTON
KB 147 PISTONS DISH 18CC
GOING TO USE STOCK CRANK 400
ISKEY CAM 270 OR ABOUT
HUNG UP ON HEADS, ITS GOING TO BE A DAILY DRIVER,
BUT ID LIKE TORK AND SPEED , WEEKEND WARRIOR.
CURRENLY BIDDING ON A PAIR OF DART HEADS 215/64CC ALUMINUM
WOULD I STILL BE ABLE TO USE PUMP GAS AND STAY AWAY
FROM DETONATION, OR SHOULD I JUST GO WITH SOME 70 OR 72CC HEADS
THANKS IN ADVANCE

[Overdriv]

64CC heads would be 10.2:1 CR with a 18CC dish piston. You might be able to run that with Aluminum heads.

Go here.

[my87Z]

sounds like a nice combo, i would change a couple of things but that is me, you should be able to run high octane pump gas with that set up. if you want it to be a daily driver i might would look into a cam with a 112LSA so that it will bleed off alittle compression, but you should be fine either way, a 270ish cam in a 406 will be about the same as a 256ish cam in a 350, it's a little small but it would be a decent daily driver and stump puller, one of my concerns would be is that you're look into set of heads that is more made for a motor intended for more cam and rpm then you will be running, it will still work but no better than a head will smaller runners that will be a little more benificial to you in the lower rpm that you entend to run, a set of 200cc is more than enough, i think that 180cc heads would be enough for the cam you entend to run. i run the DART 200cc platinum heads on my street/strip 383 running over 6000 rpm and making over 500hp/500tq and to be honest i still have room to grow with these heads. i would also be conserned about the 2.08 valves in the 215 head and the springs they are made for a cam that has a much higher lift (like .580"+).

personaly i would look more into a cam around 278ish and 234ish @.050 with close to a .500 lift, i would still run a iron head with around 200cc and 2.02 valves. this would be for a daily driver, i'm also not very big on running alm heads on the street everyday for even very regularly as they are a different metal as the block and have differnt cooling charactaristics, they expand and contract at diffenent times and on different levels. this is all just my opinion

[406 ss monte]

dart 200cc pro 1 heads, & i would go with the bigger chamber. this should let you run any pump gas. also run more cam. i would go around 235 @.050 duraton with a 110 L/S with a 1.6 rocker. top it off with a rpm intake & a 750 carb, 10 in converter & some 3.42 gears. you will have a torque monster that should be easy on parts & pull up to about 5500 rpm.

pretty much what the above post said. i just read it after i had done wrote everything out.

[BIG E 86]

thank for all the replys , i totally agree with the 180-200 runner steel heads
need a little more clarifcation between the 64cc or the 72cc chamber thanks.

[my87Z]

with my calculations i show that you should have around a 10.02:1 compression ratio with a standard deck and 64cc heads, this is fine for running high octane, a 72cc head should put you around 9.3:1 this would be what i would want if i knew i was going to put some miles on a vehicle, typicaly lower compressions are easier to tune as well. and the cam that we recomended should work with 9.3:1CR. but if you go with the 72cc then i would certainly go with iron heads, as it takes less compression with a steel head to make hp, it takes more compression in a aluminum head to creat the same heat that can be made with a lower compression and iron heads, and heat in the cylinders makes power. that is why i mentioned that i would only run aluminum heads as a pure track motor with high compression. and you'll spend 400-600.00 less on a good set of iron heads that flow just as well as the aluminum heads, look into the DART iron eagle platinum heads and the RHS heads, they are top of the line and technology when it comes to iron heads

[454C10]

http://www.chevyhiperformance.com/te...ild/index.html

406, 10:1cr, 280 cam (230 at 0.050), afr 180cc alum head, 490hp, 525 ftlb, 87 octane.

[ap72]

RHS Pro Action 200cc head with a 64cc chamber for a pump premium hot street setup, or 76cc chamber for a 87 octane milder cruising combo.

The 200cc Pro Action head is probably the best head for the money on the market right now. AFR's are a little better but the cost is a lot more. For the RHS you're looking at less than $600 for a bare set.

Darts are also very well but the platinum iron eagles are $200 a set more than the pro actions and in a daily driver that will rarely see over 6000 RPM the power difference won't be that great.

Go with RHS over the AFR or Dart and put the money you save into a roller cam. you'll be much happier.

AFR and Dart make great products, but when cost is a factor RHS is hard to beat.

[my87Z]

AFR and Dart make great products, but when cost is a factor RHS is hard to beat.


i fully agree with this statement, for the price the RHS heads are the best, you will get a little more out of a set of similar DART platinum heads but you'll also spend a couple hundred more, and wont see much of a gain unless you drag race, or look to make more power later on. and the difference isn't very much at all.

[BIG E 86]

Thanks Again I Believe Ill Go With The 200/72cc , Sounds Alot More Practical.

[Chevrolet4x4s]

Very Impressed with the quality & performance of the RHS Vortecs on my 406
Shane

[ap72]

It'll work well with that 270 and some 1.6 rockers, If you tune it well enough you may be able to get it to run fine on 87 octane too.