hi

i see there are 3 part no. for the 383 keith black pistions i am looking at for a 383 build .

162

162 R

162 L

looks like 162 has one type of valve relief , and the 162 R & 162 L have another ?


why 2 diff types of same part no? R & L are right and left . why are these made in a right and left ?



also valve relief some places poasted as 5 cc and some say 8 cc ?

anyone ran into this ?

also is there a tech line phone no . i dont see a k b web sight ?


thank you !













162 L

Go look under United Piston Machine in Reno Nevada. They also make the ICON pistons you might want to look at as well.
Todd

Their catalog is on line.

Be sure to look at their Icon IC687/KTD

the pistons are lefts and rights to orientate them with the intake valve. some of the newer KB pistons don't have that. you can send an e-mail to them and they'll help with your questions.

The ICON’s are very nice for the price. I found a set for my 511 for $500 shipped.

OP, In case you don't already have it: https://uempistons.com/
1-800-648-7970

I’m not really a big fan of how that KB162 piston is configured.

Short compression height with huge valve pockets.

Tougher to get any quench/compression out of it.

That's why the 687 is so much better.

Even with Diamonds new 383 piston, you'll have to work pretty hard to get to 10:1, like zero deck and 75 cc. Eddy's

That Icon number posted looks pretty appealing with the 4.5cc dome volume.

check over on cnc motorsports, lowest price I could find. I use the IC837 forged piston. Now $524 a set.

some recommendations here but nobody has asked what heads? pump gas? what will the engine be used for?

True....... but this is the Race section...... so I assumed it’s not a motor home or a tractor.

As with any other build....... have a good plan, do the research, and figure out what’s the best direction to take for your build.

I like KB 400 it has small dome and I have it in .040 over version had to order and wait for that .
But make easy 10.2 to 1 compression with 84 cc Eddy head and .005 down in the hole deck height. With .039 to .040 1009 gasket.
Comp cam 275 hl
Rpm intake .
Cheap 1.75 headers.
Drives good in my dads 68 charger with 727 and 3.55 gear .

This is an example of why it pays to do your homework...... and really be sure of what you’re buying.

The early version of the KB400 had a positive dome volume.
They changed it at some point, and the one listed in the 2016 catalog shows the dome volume as “0”.

I believe the dome got smaller and the valve pockets got bigger.

What that means is...... if you have the “0” dome volume version in your zero deck +.030 over 383 with a 1009 gasket and 84cc heads...... you don’t have a 10:1 motor.

It’s a 9.36:1 motor.

Even swapping out the KB’s for the Icon piston with the 4.5cc dome...... it still only gets you to 9.78:1.
Take the heads down to 82cc’s...... and then you’d be at 9.98:1.