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Jeff Lee · 10-14-2013, 01:35 PM

Here's what a "proper" stocker cam designed by Spiro Jennings sounds like through the dyno mufflers at around 2,000 RPM. This was just a break-in the cam session; one of three. Oh, cam was broke in with race springs @ 460#'s - 470#'s and Gibbs break-in oil mixed 50/50 w/ Rotella diesel oil. We've got 3 cam break-in runs of about 5 minutes each, 3 light load acceleration runs to break in the rings and I think maybe 8-10 full pull dyno runs. No wear whatsoever on the cam or lifters. Cam and lifters are coated at the shop with a compound he developed along with Tech Line.
I'm not going to post dyno #'s, sorry! But I think it will run pretty good.

[ame="http://www.youtube.com/watch?v=pSLS1fZciv8"]NHRA 1970 AMC 390 Stock Eliminator D/S - YouTube[/ame]

And here is the first or second pull. This is an old Stuska dyno. It has seen plenty of Pro Stock, Pro Stock Truck and many a Comp engine over the years, It is not state of the art but it gets the job done and the engine runs down the track just as predicted. Noteworthy to those not familiar is that the engine is manually accelerated to the predetermined RPM (still has rev limiter) and THEN brake is applied and TQ is measured on the way down in RPM. Power was no were near the 8,000 RPM we hit here, just wanted to see where it was.

[ame="http://www.youtube.com/watch?v=TImhi1IBeQ0"]Jeff Lee - October 05, 2013 NHRA Stock Eliminator Dyno 1970 AMC 390 - YouTube[/ame]

10-14-2013, 01:35 PM	#5
Jeff Lee VIP Member Join Date: Jul 2007 Location: Anthem, Arizona Posts: 2,766 Likes: 0 Liked 2 Times in 2 Posts	Re: '70 AMX C/S or D/S Here's what a "proper" stocker cam designed by Spiro Jennings sounds like through the dyno mufflers at around 2,000 RPM. This was just a break-in the cam session; one of three. Oh, cam was broke in with race springs @ 460#'s - 470#'s and Gibbs break-in oil mixed 50/50 w/ Rotella diesel oil. We've got 3 cam break-in runs of about 5 minutes each, 3 light load acceleration runs to break in the rings and I think maybe 8-10 full pull dyno runs. No wear whatsoever on the cam or lifters. Cam and lifters are coated at the shop with a compound he developed along with Tech Line. I'm not going to post dyno #'s, sorry! But I think it will run pretty good. [ame="http://www.youtube.com/watch?v=pSLS1fZciv8"]NHRA 1970 AMC 390 Stock Eliminator D/S - YouTube[/ame] And here is the first or second pull. This is an old Stuska dyno. It has seen plenty of Pro Stock, Pro Stock Truck and many a Comp engine over the years, It is not state of the art but it gets the job done and the engine runs down the track just as predicted. Noteworthy to those not familiar is that the engine is manually accelerated to the predetermined RPM (still has rev limiter) and THEN brake is applied and TQ is measured on the way down in RPM. Power was no were near the 8,000 RPM we hit here, just wanted to see where it was. [ame="http://www.youtube.com/watch?v=TImhi1IBeQ0"]Jeff Lee - October 05, 2013 NHRA Stock Eliminator Dyno 1970 AMC 390 - YouTube[/ame] __________________ Jeff Lee 7494 D/S '70 AMX Last edited by Jeff Lee; 10-14-2013 at 01:41 PM.