New Comp Cam need timing help!

tevans720 · 07-01-2009, 11:12 AM

We had just bought the Comp Cam 35-308-8 for the 5.0 ho. The motor was all rebuilt and we can't figure out the timing. I'm not a timing guru I really don't know much about it but the basics. Now I be leave a stock 302 would be set at 10* to 12* BTDC. With this cam in and timing marks lined up with each other it wouldn't start till we got it to 20* BTDC and ran like shit we advanced it little by little till it sounded and ran great at 27*BTDC But 27*BTDC seems like something is wrong. Why are we needing to go that far?

Another thing we did is and I don't think this was the right thing to do but we did we left the cam at 27* BTDC and moved the motor back to 10* BTDC. Then we lost a lot of power it seems like it was way faster before hand.

Basically what I'm asking is if anyone has used this cam and how they set theirs up? I would prefer answers with personal experience not with well my friend or it should work doing it this way. Because I have had enough of that from others.

Something just doesn't seem right what am I missing or doing wrong?

Thank for the help ahead of time
Tyler

sleeperstang · 07-06-2009, 09:32 AM

Any chance your you installed your distributor back to the engine shifted 1-gear tooth forward/backward? I can imagine this affecting your timing to where it's that far off. Just a check.

goodyear1984 · 07-25-2009, 05:43 PM

install the cam straight up at zero.set the base timing at 14. total at 34 or 36 and have it in by 3000rpm.

goodyear1984 · 07-25-2009, 05:47 PM

to set the dist put the #1 cyl at tdc on the compression stroke set the rotor pointing towards the back of the car then move the dist so the #1 spark plug wire is on top of the rotor that should get ya goin

07-06-2009, 09:32 AM	#2
sleeperstang Registered Member Join Date: Jun 2001 Location: Lynwood, CA, U.S.A. Posts: 82	Re: New Comp Cam need timing help! Any chance your you installed your distributor back to the engine shifted 1-gear tooth forward/backward? I can imagine this affecting your timing to where it's that far off. Just a check. __________________ 65 Mustang Coupe...Comp Cams 262 Xtreme Energy, T-5 conversion, Romac Balancer, 620 Front Springs-4.5 Mid-eye rear springs.......work in progress

07-25-2009, 05:43 PM	#3
goodyear1984 Registered Member Join Date: Dec 2006 Location: new york Posts: 482	Re: New Comp Cam need timing help! install the cam straight up at zero.set the base timing at 14. total at 34 or 36 and have it in by 3000rpm. __________________ 347 stroker all forged,arp everything,stud mains w/girdle,7qt pan,full roller, custom cam, aluminum heads swirl valves 5 angle valve job.quick fuel 750,areomotive pump,cobras w/nitto drags,and m/t et drags for the track, ford racing 373 gears,centerforce clutch,tko500,underdrive pulleys,bassani x-pipe,flowmasters ^best et so far 11.6 1.61 60ft coming soon 9sec et's 1992 mustang gt 2001 gmc 1500 4x4 78 century boat 92 skidoo

07-25-2009, 05:47 PM	#4
goodyear1984 Registered Member Join Date: Dec 2006 Location: new york Posts: 482	Re: New Comp Cam need timing help! to set the dist put the #1 cyl at tdc on the compression stroke set the rotor pointing towards the back of the car then move the dist so the #1 spark plug wire is on top of the rotor that should get ya goin __________________ 347 stroker all forged,arp everything,stud mains w/girdle,7qt pan,full roller, custom cam, aluminum heads swirl valves 5 angle valve job.quick fuel 750,areomotive pump,cobras w/nitto drags,and m/t et drags for the track, ford racing 373 gears,centerforce clutch,tko500,underdrive pulleys,bassani x-pipe,flowmasters ^best et so far 11.6 1.61 60ft coming soon 9sec et's 1992 mustang gt 2001 gmc 1500 4x4 78 century boat 92 skidoo

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07-01-2009, 11:12 AM	#1
tevans720 Registered Member Join Date: Jun 2009 Posts: 1	New Comp Cam need timing help! We had just bought the Comp Cam 35-308-8 for the 5.0 ho. The motor was all rebuilt and we can't figure out the timing. I'm not a timing guru I really don't know much about it but the basics. Now I be leave a stock 302 would be set at 10* to 12* BTDC. With this cam in and timing marks lined up with each other it wouldn't start till we got it to 20* BTDC and ran like shit we advanced it little by little till it sounded and ran great at 27BTDC But 27BTDC seems like something is wrong. Why are we needing to go that far? Another thing we did is and I don't think this was the right thing to do but we did we left the cam at 27* BTDC and moved the motor back to 10* BTDC. Then we lost a lot of power it seems like it was way faster before hand. Basically what I'm asking is if anyone has used this cam and how they set theirs up? I would prefer answers with personal experience not with well my friend or it should work doing it this way. Because I have had enough of that from others. Something just doesn't seem right what am I missing or doing wrong? Thank for the help ahead of time Tyler