Duke William's Tuning Seminar

[Scott V.]

Hi,

I am trying to gather the parts to upgrade my 300HP 63 distributor to work in my 340HP rebuild and have spent a lot of time reading the posts from Duke and others which have been extreemly helpful. It looks like a B28 can (still looking for one) and black Mr. Gasket springs will get me close. Duke's "Timing Seminar" is referenced frequently however my searches are not turning up the file to download - most probably me not searching correctly. Can someone please point me in the right direction for the file.

Thanks,

Scott

[Don H.]

Re: Timing Seminar - File Location

https://www.metroli.org/pdf/2012%20Nationals%20tuningseminar.pdf

Here you go

[Duke W.]

Re: Timing Seminar - File Location

All '63 carbureted engines used the exact same distributor. Of course the 15.5" 201 15 VAC didn't meet the Two-Inch Rule with the Duntov cam, which resulted in serious idle instability on 340 HP engines. (The FI engine for some unknown reason had ported vacuum advance. This was the first year that the engineers used vacuum advance on mechanical lifter engines and the screwed it up, but fixed it in '64.) The least aggressive current VAC that does is the B28, but there are a lot of reports that some don't meet spec.

Forget the Duntov cam. Go with the LT-1 cam.

High overlap cams like lots of idle and low speed advance as explained in the tuning (not timing) seminar. So the OE 24 max centrifugal is good. but get it in at 2500 to 3000. The set timing with the VAC disconnected by revving a few hundred above the point of max advance and set it as high in the range of 36-40 as the engine will tolerate without detonation with a dial back timing light.

I hope you know that the '63 conn rods are weak and should be replaced.

Look at the second to last post in the sticky section. You'll find my tuning seminar there, plus look for the compression ratio paper and the Special 300 HP Tech Support paper.

The only major difference between the Special 300 HP configuration and the 327 LT-1 configuration is the camshaft, spark advance map, and slightly different max recommended compression ratios.

Search the Corvette Forum for threads started by Dave McDufford and ghostrider20 for extensive discussion of the 327 LT-1 development and testing.

Although I no longer participate in the Corvette Forum, you will find a lot of useful information by searching for threads started by SWCDuke.

Duke

[Scott V.]

Re: Timing Seminar - File Location

Don and Duke,

Thanks very much for your responses - I look forward to reading the information from the tuning seminar. Really appreciate all the help provided on the Forum - it's invaluable and extreemly helpful.

Scott