327 Engine Mods.

[kart11]

Im looking to do so performance upgrades to  my 67 327 Camaro , It was originally a 327/210hp . The motor was rebuilt prior to me buying the car 3yrs ago . It currently has stock heads, Air Gap intake 4/ 1" spacer , 650 Holley DP Electronic Ign. Dynomax Ceramic Headers, Flowmater w/x pipe. 3:55 Posi. 4Speed. I am looking at adding Edelbrock Performer RPM ALuminum heads and there 7102 cam. Does anyone have any input on this combo or any other suggestions ?

TIA
Jeff

[hotrod68]

Wow Kart--nice-looking car! That 327/210 doesn't have much static compression, so from my experience the RPM heads would work very well with a cam of around 230 duration @ .050" and around .500" lift. The RPM intake ports are around 170ccs, so a 327 with 3:55s will have good low-end response if you get the smaller combustion chamber heads. The 650 double-pumper will work, but I'd use a 600cfm 1850 Holley and a Trick Kit to tune it with--that low-compression 327 just doesn't need that much carburetor. You already have the good stuff otherwise. I've seen the combination I've suggested put a 327 car much like yours solidly in the 13s in the 1/4-mile. Not bad for a 327/210 base engine! That's my input, for what it's worth. Good luck! 

[kart11]

Thanks Hotrod68, I was able to get ahold of  the previous owner (he rebuilt the engine before I bought it) and found out the car has 10:1 but he couldnt remember the cam specs, I still may change the cam to something a little more choppy but nothing  that stock rockers cant handle.

TIA

[Southerner]

Looks like a nice street beast. I may be posting a bit late. But have you thought of using a sloid lifter cam ? They are very responsive. Here is a good example of a nice cam to use. It is the Lunati PN 20108 LK . It is particularly well suited to a 10 to 1 compression ratio 327. It is lunati's copy of the Duntov cam.
 It's static compression ratio is 10 / 1

Dynamic compression ratio is     8.23 / 1

So it will run quite happily all day on 91 octane gas

Most importantly the powerband is between 1800 and 6200 rpm. Thats a 4400 rpm wide band !!
This is quite a good cam for a light Camaro with a 4 speed stick, you will have plenty of low down torque

The valve lift  is .485 intake and .503 exhaust, so a good new set of chevy LT1 copy springs should live for a long time in this engine provided you dont miss to many shifts. 

[pdq67]

Any 64 cc head and either the .015" or .020" thick shim headgaskets will get you up to a stock very close to 10 to 1 CR so that you can run any number of great old 268/270/272 and even a couple of 274 hy-cams.

This effectively turn's the 210hp/327 into the 275 and 300hp/327.

pdq67

[Stingr69]

Looks like a nice street beast. I may be posting a bit late. But have you thought of using a sloid lifter cam ? They are very responsive. Here is a good example of a nice cam to use. It is the Lunati PN 20108 LK . It is particularly well suited to a 10 to 1 compression ratio 327. It is lunati's copy of the Duntov cam.
 It's static compression ratio is 10 / 1

Dynamic compression ratio is     8.23 / 1

So it will run quite happily all day on 91 octane gas

Most importantly the powerband is between 1800 and 6200 rpm. Thats a 4400 rpm wide band !!
This is quite a good cam for a light Camaro with a 4 speed stick, you will have plenty of low down torque

The valve lift  is .485 intake and .503 exhaust, so a good new set of chevy LT1 copy springs should live for a long time in this engine provided you dont miss to many shifts. 

I agree - Solid lifter cam for a 327. That is the only way to fly in one of those in my opinion.

-Mark.