Projects Chevy 283 build

I'm going to be building A Chevy 283, standard bore ,but going to bore it .030 over.I will be using 520 heads,and maybe A Isky Z20 cam ,and would like to use dome pistons to get my compression up.I was considering KB dome pistons from Summit, but know A guy that has A NOS TRW forged flat tops.I don't know witch ones to go with.

The motor is going in A 86 s10 with 3.73 gears,and A nv 3500 5 speed out of 90's Chevy full size truck.

 

TRW Forged all the way.

 

That's what I was leaning towards, wondering what compression they would have.

 

9.25 to 1 Compression ratio without any milling work and using a FelPro head gasket.
This will run on today gas and not give you any issues.
I would highly recommend Sealed Power piston rings.

 

Ok thanks
I would love to have A set of TRW forged dome pistons.

 

Don't assume the 283 will clean up at +.030, my 327 would not, had to go +.040.

 

How much compression do you think you need here? You can get it way over 10 to one with flat pistons.
I assume by the transmission, that this is a street vehicle. Yes?

 

I seriously doubt a 283 with flat top pistons (true flat top without any valve reliefs, as the factory started out with) will be anywhere near 9.25:1; it's really hard to build any kind of CR with these small bore, short stroke engines. Now throw 4 valve reliefs with flat tops at it and see what happens. I know, I have a couple of them. Look at a Motor's Manual if you have any real concerns; stock 265/283 engines were down around 8:1; the performance engines, with domed pistons, were 9.25:1. I have more small journal/small bore parts than I care to admit to, and if I were to do it all over again..............there's no replacement for displacement. Start big, go bigger, it'll be cheaper, and you'll be happier. JMO. I am Butch/56sedandelivery.

 

The motor didn't have much ring grove,I think .030 will clean it up.I got A 327,400sb,two 283 to choose from.I just build A 327 about three years ago for my 54 bel air ,and alway whanted to build A 283.The 283 is going in A light truck with pretty low gear,and A 5 speed,should be a fun week end toy.

 

Butch,
283, +.030 , 3.905 bore, zero decked, .035 gasket, heads milled to 55 cc, 3 cc valve relief = 10.27 cr. Plenty of ptv with mild cam. Piston won't hit heads either, in street use.

O/P: Quit listening to the guys at the Tastee Freez. You don't need a domed piston.
If your machine shop says you do...Walk!