CRG Discussion Forum

Camaro Research Group Discussion => General Discussion => Topic started by: bcaudill317 on June 25, 2021, 03:38:29 PM

Title: 140 off road cam first gen
Post by: bcaudill317 on June 25, 2021, 03:38:29 PM

When running a first gen 140 off road cam how much vacuum should it have at idle?

Title: Re: 140 off road cam first gen
Post by: bertfam on June 25, 2021, 03:40:33 PM

http://www.camaros.org/forum/index.php?topic=13031.msg111010#msg111010

Ed

Title: Re: 140 off road cam first gen
Post by: bcmiller on June 25, 2021, 06:39:10 PM

Good information there, and the last post in that thread was by JohnZ. 

Title: Re: 140 off road cam first gen
Post by: BillOhio on June 26, 2021, 12:30:06 AM

Interesting to read that.  That was before my car was restored.  After the engine was rebuilt, I could only get 4.5 inches of vacuum out of that cam.  I took it out.   I am not sure why but I did everything I could check and x33rs helped me quite a bit on tuning it. Sounded like a drag car but it was not much fun going to a car show and backing into a spot. 

Title: Re: 140 off road cam first gen
Post by: CJP_69 on June 29, 2021, 05:05:59 PM

I'm around 4.5" also with a Crane Blueprint 140.

Title: Re: 140 off road cam first gen
Post by: BillOhio on June 29, 2021, 11:31:12 PM

I just was out tuning the new cam.  Small solid roller from Howards.  I had 14 inches of vacuum and acts real responsive.  I have not driven it yet.  Has a nice sound to it also.  My engine builder is pretty much anti anything other than a roller cam anymore after seeing a lot of problems.