HI THERE ,I GOT A 327,30 OVER FITTED WITH TRW L2166NF DOMES ,.THE HEADS ARE 291 FUELIES AND 202/160S. A BALL PARK FIGURE WOULD BE GREAT

 

Bore 4.030"
Stroke 3.25"
Combustion chamber vol. 64 cc
Piston head volume -5.5 cc
Gasket thickness ( your choice ) .039"
Gasket bore 4.10"
Piston deck ( stock value +/-) .025" below deck
Static compression ratio 9.17:1

 

That doesn't sound right. I think you got the sign wrong on the piston volume.

Piston dome should be 5.3cc. But, 5.5 is close.

If the deck height is .025", why would you use a .039" gasket? The compression distance on those pistons is 1.675".

I'd say closer to 11:1.

 

Did a little more research. The Summit catalog shows a negative value for the piston head volume. -5.5 cc. Check this link.
http://store.summitracing.com/partde...rt=TRW-L2166NF

However, a little digging and I found the listing in the Federal catalog. You are correct. There is positive value assigned to this part number.
http://www.21cgt.com/FMWebCatalog/default.htm
Based on that info the new comp ratio would be around 10.4:1 again based on a .039" gasket. Choose whatever gasket you would like.

 

For calculation purposes.

 

hey people thk u for your time ,the compression ratio sounds good to me ,in the 10/ 11 area ,all i need now is a good gear to drag my pick up up the 1320 it has 30 in tyres a th350 and weighs in at about 2700 ,,any ides .. its a weekend warrior stroke street legal, i currently have a 489 chrysler 83/4 rear end sporting 272 diff errrrrrrrr!! its a long day up the quarter as u can appreciate

 

For a 400+/-hp 327 in a 2700# vehicle with 30" tyres, you'll want a 4.56 to 4.88 gear. That will put you thru the traps at around 6500rpm. Depending on the actual engine power and total vehicle weight.
Get a 4000 stall 8" or 9" converter.

 

Why join a 3rd gen forum then? Why not join a forum that's more intended for your car, whatever it may be? An old Nova, or what?

 

What good are calculations that produce the wrong answer?
If it can be considered 3rd gen related, it can be discussed here. Calculating CR is relateable to 3rd gens.

 

oh of course, no problems there.
I just don't understand the mindset, ie. "I have a 1968 Nova that i'm setting up for a dragstrip... why don't I join a forum for a 1985 Camaro!!! I mean, you might as well join a forum for chevy trucks.... what's the motivation for 3rd gen camaros? not first gen (which would be similar, ie. 327 engines), or 2nd gens, etc. but third gens? why?
I don't know that he has a Nova, it just sounds like it's not a 3rd gen Camaro, and i'm not sure what the allure is to this particular forum - why not join a related one? Just curious, that's all.

 

[QUOTE=five7kid;4114372]What good are calculations that produce the wrong answer?

QUOTE]

How can the answer be wrong?
It's just a matter of inserting variables into an equation. Choose whatever values you like regarding deck height or gasket thickness. There are many possible results. Some desireable and others not so much.
I will agree that a .039 gasket and a .025 piston below deck doesn't give the best case results however the answer isn't wrong. It's an example.

 

hey take it easy people ,.. i was just curious about the engine specs , its a ****** pick up i got not a third gen etc.. sorry..these are the best sites to come on to reference trouble shooting ie(chevys etc) thats why id thought id jump on.. thks for the info any how...

 

One small block Chevy is pretty much like another. It doesen'tmatter to me what it's installed in. ( For the record we race an 81 Monte Carlo, a 67 Chevelle, an 86 Firebird and my own 86/87 Camaro).
I could talk about small blocks all day.
I will apologize for any misinformation I may post. There are people in this forum that have a lot knowledge just based on their achievements. (Anyone that races in an NHRA class is alright in my books! 'ie. 57kid')
It's all done with the best of intentions. I'm always interested in the results.