dug

iTrader: (10)

Seems to me they all fuckd up cuz when you mill the heads for more compression none of the bigger cams fit. Stupid stupid stupid.

Aftermarket heads should raise the compression up to 11 to 1 without losing piston to valve clearance.

Nate_Taufer

iTrader: (1)

Because the only way to raise compression in a STOCK PORTED CASTING is to weld the chamber and re-cut the chamber, or mill the head. That's it.

Nate

dug

iTrader: (10)

Im talkn about the darts and afr heads. They should bolt on out of the box with 11 to 1 compression.

JakeFusion

iTrader: (7)

Good point. I've always wondered the same thing with these aftermarket castings. If someone is going to buy it, seems like they'll also use a bigger cam that will need more compression. By the same token though, most also build up the engine, flycut, or do other things to run the right combination.

Obviously, people are buying them, so I don't think convenience is a huge selling factor. Shadetree mechanics might like to cut out a few extra steps, but for those whom go to a shop, another few bucks for milling/flycutting is not a big deal.

dug

iTrader: (10)

Cutting the pistons isnt as cheap or easy as people make it sound. AFR and Dart dropped the ball on this.

mr2guru

iTrader: (16)

ET makes chambers down to 38cc..... now waiting for custom ETs is another issue altogether.

PREDATOR-Z

Don't forget that AFR's are CARB certified I believe. I'm sure that had something to do with it.
Funny, I was just wondering the same today.

'hoochie2

Manufactuors try to make the parts have a broad appeal. It's already to easy to buy parts that are beyond the users level of know-how. If you can't figure out how to acheive _____________, it is probably better left to a professional who can.

duece_bigalo01

iTrader: (6)

isnt the dart heads a 62cc head and the stock heads a 67cc head?