Dion586485

Are the original piston domes visually the same as the aftermarket pistons for the 375 horse engines?

TCracingCA

related to the combustion chambers and other areas of the pistons! if you want more traditional to the period, I wouldn't go back to the special outfits- but go back with like TRW units (or other OEM type suppliers) if that is what you are wanting.

ghostrider20

TRW / Speedpro makes just what you are looking for. 1.5 CC domed forged Pistons.

Dion586485

Thanks for the info will check into it

JohnZ

Here's the Federal-Mogul/Speed-Pro L2166NF forged piston - absolutely identical to the factory TRW part (except for the added anti-friction coating). Second photo is an original.

Tracy64

Man... I've installed many of those back in the day.

Mr D.

Is this the same piston as a 1972 350 LT1?

jim lockwood

Unlikely. Starting in '71, compression ratios were reduced so engines could run on regular gas.

TCracingCA

seem to have a formula of offerings based on study of what they think there is a market for that actually goes with the compressions and bores that most guys would need or want. I have shopped for pistons and the last ones were like space ship leveled spec'd out by Ross for me with all of the bells and whistles and free T-shirt, but that custom stuff causes me to eat Top Ramen for the next week or so based on the cost. and yet again, because of getting car parts for the millionth time, i forgone getting my first tattoo that was planned in my military days originally. So i have car parts, eating top ramen and still not actually tattood!

Mr D.

Thanks Jim

1970 Z28 Engine - LT1 360hp (gross)
Domed type - yields 11.0:1 compression
63.995 cc, 2.02/1.6 valves, screw in studs & guide plates

1971 Z28 Engine - LT1 330hp (gross, 275hp NET)
Flat w/valve relief - yields 9.0:1 compression
75.47 cc, 2.02/1.6 valves, screw in studs & guide plates

1972 Z28 Engine - LT1 255hp (net)
Flat w/valve relief - yields 9.0:1 compression
76.18 cc, 2.02/1.6 valves, screw in studs & guide plates


Reason I asked is I have a 1972 CE 350 LT1 & angle plug 2.02/1.60 heads that I think are 64cc. The pistons are domed so I'm guessing this replacement engine is of the 1970 LT1 360hp family.

I have a CE 512 block with the rear vent PCV hole, both the 512 and LT1 010 are low mileage Std. bore blocks. My plan is to use the crank, rods and pistons out of the LT1 block and build up a 350 that is dressed out to look like a 327/350hp. I am concerned about the compression using these pistons and the 461 heads 64cc heads.

JohnZ

No, it's not. 327 and 350 pistons have different compression heights (distance from centerline of pin to flat crown), as they have different stroke but use the same 5.7" rods.

Mr D.

Thanks John.