Hi all,

I was just thinking about slant heads and porting, etc. It occured to me that the darn open combustion chamber was still a limiting factor. Has anybody tried welding up the chamber, machining it flat, and closing it up? This link http://moparmusclemagazine.com/techarticles/5115/ seems to suggest that people have done this with big block heads.

Thoughts?

i have heard of guys trying to make the closed chamder "915" heads out of "906" castings by welding them up since both castings are similar otherwise. i have no idea if it works or not, but anything is possible. a similar result could be had with a dished piston or what kb has been doing with their "step dish" design recently. some chevy guys i know call them"reverse dome" and have been popular with guys running in circle track classes where a certain stock cylinder head must be used. i guess the shape of the dish directs the charge to the center of the piston? i seem to recall reading about this, but not sure where. perhaps similar pistons could be made for a slant?

-james

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You could talk to Brent Laney or Mark Goodman. I believe that is one of the tricks they used on the Green lancer.

Seymour did a complete article on this car in one of the newslettes. I will try and dig it up.

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Nitrous cars are like old men on Viagra. Once the bottle is empty they are useless.
FJD

I ran 906 heads and Arias reverse deflector pistons in my last big block. worked well.

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Wild 1 AKA William Robertson
Owner Builder
65 Dart 270 2 door post /6 stock
89 dodge diplomat
66 Plymouth Barracuda
70 Challenger 451 ( Sold )
95 Chy New Yorker ( Stock )

The new "hemi" has reverse dome pistons to improve quench.

It is hard to build quench into a 225 SL6 because of the .140 negitive deck and small chamber size.
You either end-up with real high compression ratio or a "top heavy" piston with a "hump & dish" design.
Bottomline, it is more troble then it is worth in added performance.
DD