GM 847 Idle + Rev video
Registered User
Joined: Jan 2002
Posts: 1,001
From: Houston TX
Originally posted by atljar
Thanks Jesse. You installed that pulley yet?
Stock bottom end. Unported heads, not milled, no valve job, never been off the car stock.
Car is everyday driver. Only issue i have with cam is that it surges a tad if you back off the gas quckly at ~1500rpms. As long as you are giving it gas all is well. 24-26mpg on highway with 4.33 gears
Cam pulls 11 inches or so of vacuum. Power brakes werent as good as they were before cam change. I compensated for that with tuning so that the car idles at 1500-1600 when slowing down so that the brakes work fine. Once it comes to complete stop, it idles down to 875.
Thanks Jesse. You installed that pulley yet?
Stock bottom end. Unported heads, not milled, no valve job, never been off the car stock.
Car is everyday driver. Only issue i have with cam is that it surges a tad if you back off the gas quckly at ~1500rpms. As long as you are giving it gas all is well. 24-26mpg on highway with 4.33 gears
Cam pulls 11 inches or so of vacuum. Power brakes werent as good as they were before cam change. I compensated for that with tuning so that the car idles at 1500-1600 when slowing down so that the brakes work fine. Once it comes to complete stop, it idles down to 875.
As for vacuum, I want to keep power brakes... without getting a tune you got isnt it possible to get a vacuum reserve/booster put in? would that be easier/safer?
Thanks,
Robert
Thread Starter
Registered User
Joined: Feb 2001
Posts: 3,068
From: Cincinnati, Ohio
I see, I've been debating on streetable cams yet wanting to run 11's na... and hell you did it with stock unported heads which is ***in a' sweet!.... As for the surging, if your crusing and the RPMs are at ~1500rpm will it feel/drive any different than driving at ~2500rpm?
As for vacuum, I want to keep power brakes... without getting a tune you got isnt it possible to get a vacuum reserve/booster put in? would that be easier/safer?
Do you think its possible to get rid of all the cam surge with tuning?
How do you think this cam will run with stockheads and stock 3:42 gearing? Think the cam surge will be more evident or will it be liveable? Thanx!
Registered User
Joined: Jan 2002
Posts: 936
From: Merrillville, IN
this thread is helping my hydrolic roller or solid roller cam decision quite a bit.. I need a cam that makes power all the way to 7k and haven't been having luck finding a hr to do it.. looks like i might have to sack up and get a sr
Thread Starter
Registered User
Joined: Feb 2001
Posts: 3,068
From: Cincinnati, Ohio
Originally posted by lt1camaroman93
this thread is helping my hydrolic roller or solid roller cam decision quite a bit.. I need a cam that makes power all the way to 7k and haven't been having luck finding a hr to do it.. looks like i might have to sack up and get a sr
this thread is helping my hydrolic roller or solid roller cam decision quite a bit.. I need a cam that makes power all the way to 7k and haven't been having luck finding a hr to do it.. looks like i might have to sack up and get a sr
MAF...that was one of the first mods i ever did to car. No issues at any stage.
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