Cam install! but smoke??
Thread Starter
Pro
Joined: Apr 2010
Posts: 651
Likes: 17
From: MD
Cam install! but smoke??
Hey guys! This week I got my new cam installed and dyno tuned with HP tuners/wideband/street, etc. Runs like a scalded dog. But one question, is it normal to have a slight hue of smoke that smells like raw fuel ONLY at idle? Here is a vid of the car with some visible smoke.
cam specs are 231/242 - .617/.592 @ 112+2 LSA
https://www.facebook.com/video.php?v=10152476990526314
PS. It dyno'd 421 rwhp - 398 rwtq SAE
cam specs are 231/242 - .617/.592 @ 112+2 LSA
https://www.facebook.com/video.php?v=10152476990526314
PS. It dyno'd 421 rwhp - 398 rwtq SAE
Last edited by Dave02C5; Oct 25, 2014 at 12:36 AM.
Drifting
Joined: Sep 2009
Posts: 1,719
Likes: 4
From: cinnaminson n.j.
St. Jude Donor '14
It's common for a cam that size to stink at idle. I don't think a slight wisp of smoke is anything to get alarmed about.
Did you replace the valve seals with the cam install?
Does your oil smell like gas?
Do you have fresh high quality synthetic oil in it?
Have you had anyone follow you around at different speeds, load and rpm to double check the smoke?
Did you replace the valve seals with the cam install?
Does your oil smell like gas?
Do you have fresh high quality synthetic oil in it?
Have you had anyone follow you around at different speeds, load and rpm to double check the smoke?
Drifting
Joined: Sep 2009
Posts: 1,719
Likes: 4
From: cinnaminson n.j.
St. Jude Donor '14
My car smells at idle on cold start, not to much when warmed up. No smoke. I am running a tsp 228R 114 lsa, a little milder than yours. Did you ask your tuner about it?
Maybe some guys with similar cams will chime in.
Maybe some guys with similar cams will chime in.
Drifting
Joined: Sep 2009
Posts: 1,719
Likes: 4
From: cinnaminson n.j.
St. Jude Donor '14
The blue smoke is burnt oil. The fumes/odor is fuel. If you can live with the smell, drive it. You could put cats on it, but that would be a temporary fix. They won't be effective very long.
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Pro
Joined: Mar 2008
Posts: 664
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From: Kearney Nebraska
Looks like a possible valve stem seal leak to me.
When you installed the new valvesprings how did you install the seals?
PS Ive ran catless and tuned cars with 252/260 621 615 109+3 cams on 370CU in Iron blocks that dont smoke like that.
When you installed the new valvesprings how did you install the seals?
PS Ive ran catless and tuned cars with 252/260 621 615 109+3 cams on 370CU in Iron blocks that dont smoke like that.
Last edited by 06x6spdGTO; Oct 30, 2014 at 02:00 PM.