Piston choice

[Joe M.]

Re: Piston choice

I see the other alternative piston is from Egge engineering. Has anyone gone that route?

Anyone ever measure a KB66 and a stock piston?

[Jack A.]

Re: Piston choice

Wow thats a lot of information. I think I know what to do now. Sorry it took me a while to get back to you guys. I was away at the NCRC meeting in Orlando. I had an additional question. Was there a different clutch/pressure plate combo for the Solid Lifter engines. I see them advertised as combos and I want to make sure they are right for my car. If they are different does anyone have the part# for it?

Thanks,

Jack

[John N.]

Re: Piston choice

if you want the original "clonk clonk" sound from your engine when cold you will have to used forged piston

Clem
I believe the 315 pistons were cast.
Regards

[Joe L.]

Re: Piston choice

Clem
I believe the 315 pistons were cast.
Regards

John-----


I wondered how long it was going to take for someone to mention that the 315 hp pistons were CAST aluminum. In fact, they were conventional cast aluminum; current-day hypereutectic cast are almost twice as strong, rivaling forged pistons.

All PRODUCTION 283 pistons were conventional cast aluminum. The first use of a forged piston in a Corvette was for 1962 340 and 360 hp. I'll bet that GM would have used hypereutectic cast pistons for them, too, except they had not been invented yet.

I recommend the use of KB hypereutectic pistons for ALL 283 applications. In fact, I also recommend them for all Corvettes which originally used forged pistons when replacement is required and the engine is intended primarily for STREET operation.

You guys seem to always be concerned about excessive oil consumption. A GREAT way to achieve excessive oil consumption, among other things, is to use forged pistons.

[Clem Z.]

Re: Piston choice

John-----


I wondered how long it was going to take for someone to mention that the 315 hp pistons were CAST aluminum. In fact, they were conventional cast aluminum; current-day hypereutectic cast are almost twice as strong, rivaling forged pistons.

All PRODUCTION 283 pistons were conventional cast aluminum. The first use of a forged piston in a Corvette was for 1962 340 and 360 hp. I'll bet that GM would have used hypereutectic cast pistons for them, too, except they had not been invented yet.

I recommend the use of KB hypereutectic pistons for ALL 283 applications. In fact, I also recommend them for all Corvettes which originally used forged pistons when replacement is required and the engine is intended primarily for STREET operation.

You guys seem to always be concerned about excessive oil consumption. A GREAT way to achieve excessive oil consumption, among other things, is to use forged pistons.

if you use hypereutectic pistons make sure you follow the instructions for the top ring end gap because these pistons hold more heat and the top ring expands more that with a cast or forged piston.

[Clem Z.]

Re: Piston choice

Clem
I believe the 315 pistons were cast.
Regards

correct as i misspoke because i never used a cast piston in anything i ever built so old habits are hard to break.

[Duke W.]

Re: Piston choice

I see the other alternative piston is from Egge engineering. Has anyone gone that route?

Egge had a booth at the National Roadster Show in Pomona. They had an example of their TRW pop up clone for 283s, however they are cast, not forged. They are also working on 265 pistons.

They cast and machine all in house in their California plant and are worth checking out in more detail, but I'll leave that up to 283 and 265 owners.

www.egge.com

Duke

[John N.]

Re: Piston choice

Jack
I have on the shelf
(1) NOS GM 315 pistons .030
(2) NOS FM L2275F-30 pistons, The dome is very aggressive and should
yield over 11 with 62cc. Maybe someone can find the specs (bought
in the 90's)
(3) KB
(4) Two years ago I had a set of JEs .070 made using a 315 dome. I can
supply the order numbers if you are interested. They could make
them the diamenter you want. They were lighter than the stock
pistons. I had them made to save a block which had run at
Bridgehampton.
Call if you want to discuss your options (918) 231-4454 CST
Regards

[Clem Z.]

Re: Piston choice

FM-L2275 F-30 have a 18.5 cc dome .450 high

[Jack A.]

Re: Piston choice

Thanks for all the information. John I will give you a call.

Jack

[Steven B.]

Re: Piston choice

I see the other alternative piston is from Egge engineering. Has anyone gone that route?

Anyone ever measure a KB66 and a stock piston?

I have not used Egge but have KB's in 2 engines. Egge is used by a restorer friend of mine (been in the business since the 70's) and has been for years in multiple types of engines. He is very happy with them, even in supercharged ACD's.

[Jack A.]

Re: Piston choice

Thanks for all the info. I appreciate it. I think I will go with the KB's. Summit does have them .I believe the one's I need are the KB UEM 166030 as listed on the Summit site. I was also checking on a cam/lifter kit for the same 315 HP engine. Do these suppliers have their own versions of the 097/Duntov cam? or do I have to get it thru GM. Summit lists a kit as stock for my car as a NAL1234054. Just in case somebody knows where I can get the correct piece? I will call Summit when they are open.

Thanks again.
Jack

[Jack A.]

Re: Piston choice

Well, I just called Summit and they have someone who makes the original Cam. So I guess for less hassel and perhaps less money I would appreciate it if anyone know where it may be ordered as a stock item along with the correct lifter kit.

Thanks,

Jack

[Ray C.]

Re: Piston choice

If the cam is Federal Mogul CS-113, try Carquest Auto Parts for prices.


Ray

[Gene M.]

Re: Piston choice

Ray,
If you are not at deck height and using a shim head gasket I doubt that you will be at 10:1. More like 9.9:1 at best. Most pistons without decking will set in the range of .020" in the hole. That fuelie cam will be a dog without big compression. I would seek a cam more streetable with 9 to 10:1 compression.