c2 66 NOS 327 engine-correct damper?

[Chuck Swenson]

Re: c2 66 NOS 327 engine-correct damper?

Darn, I guess the intake manifold bolts were orange too then, correct? Which NCRS book in the C2 library should I buy if I'm just worried about the engine for now? The 67 only or the mechanical for 62-67?

Thanks, Chuck

[Chuck Swenson]

Re: c2 66 NOS 327 engine-correct damper?

Interesting! I'd love to find a NOS Chevy II recessed block (3791362) for my Nova.

I did have the engine shop where I bought NOS block, along with local machine shop, along with 1/2 hour video, document the NOS block in case I ever sell in the future. It came from an estate sale. Guy had 9 60's vette motors, but only one was NOS. The block and heads were for sale on the Internet for only 8 hours. I saw it and did a reverse telephone number search on the phone number listed for ?'s. It was only 20 minutes from my house, what luck. I drove there Sat morn and was at the machine shop doorstep at 8am, checked out the block and paid cash for everything at 8:15am. Unbelievable!
Chuck

[Chuck Swenson]

Re: c2 66 NOS 327 engine-correct damper?

Update, someone selling a damper on eBay just sent me measurements of an 8" L-79 original balancer, 2 3/8" height, same as all the other 327 balancers with different ring thicknesses! Looks like GM just varied the diameters and thickness of the balancers, and not the height (laying flat on table to top). I even checked a 2 bbl 327 one just to see as I was curious and it was 2 3/8" also. Makes sense as different HP 327 engines could still use the same pulleys.

At least I now know it's a pulley problem with my engine. Thanks for everyone's help!

Chuck

[Chuck Swenson]

Re: c2 66 NOS 327 engine-correct damper?

WOW Joe! Engine on dyno today, guess what? Max hp was 280 @ 5200 RPM! So your comment "I would limit engine operation to about 5,200 RPM with the balancer that you're using." was right on the money. We did go to 5500 today just to see, but peak was at 5200. I though the HP would be a little higher, at least 300, especially since I have L-79 cam and 3 angle valve job. My points dist had a pbm, so used HEI spare for rest of day. Engine will be off off dyno on Monday. You think I should put a points dist from local store in until I can find out whats wrong with the 67 GM one (numbers matching one)? I'd like to have on dyno with a points dist. Oh, max torque was 324.4 at 3900.

Also, timing mark off by 8 degrees. When timing set to 8B, timing mark on tab shows 0. Any ideas?

Thanks, Chuck

[Joe L.]

Re: c2 66 NOS 327 engine-correct damper?

Chuck-----

Do you know the part number of the balancer that you have on the engine? If it's a GM #6272221 which meets your decription and was used on 1969 327s (the last year for 327s) as well as many 69+ 350s and 307s, it will have the timing mark in a different location than the balancer used on 1968 and previous small blocks. Curiously, the pre-69 small block and 69+ small block balancer marks differ by 9 degrees.

[Chuck Swenson]

Re: c2 66 NOS 327 engine-correct damper?

Joe, GM part number 3896903 (new from GM, still available), which I show for 66-67 327. I did wind up using a 1/8th aluminum spacer I bought from racing shop. Also, I had engine balanced at machine shop.

Thanks again, Chuck

[Joe L.]

Re: c2 66 NOS 327 engine-correct damper?

Chuck------

The balancer part number you mentioned should have the correct timing mark for your application unless it was packaged wrong. Compare the relationship of the balancer keyway to the timing mark on both your original as well as replacement balancer to make sure that you didn't get an incorrect balancer packaged in the wrong box.

Otherwise, I'd say that you have some other sort of timing problem. Perhaps, you were a tooth or more off in aligning the crankshaft and camshaft sprockets or your're off with respect to distributor position.

Also, if you have a variable timing light, check to be sure that you're set at the "0" position.