LT1 Camaro Timing Issues

Rich Biebel · 06-14-2014, 08:38 PM

Line up your crank trigger wheel and timing pointer on number one cylinder.......pull the cap off and see where the rotor is pointing to in the cap.....if something happened to the distributer or cam you should see it there...Rotor should be pointing somewhere close to number one terminal in the cap. I would bet it is not....and something failed like Lee pointed to.....

Do you send the crank trigger signal into your ECU and then to your ignition box......or bypass the ECU and direct to the ignition box with locked timing....?

I ran my LT-1 with locked timing and did not use the ECU to change the timing.....

camaro95 · 06-16-2014, 10:43 PM

Thanks everyone for the info. Found rotor hub had slipped causing #2 cylinder to fire when #1 was suppose to. Not sure what caused it to slip, no damage to the rotor or cap was seen. Runs good now, hopefully no damage from the backfiring at high rpm

Ed Wright · 06-17-2014, 08:43 AM

Cheaper and easier than having keyways cut, you can do like many have done to LT1s with blowers. Drill in from the front, between the crank & hub for a 1/4" roll pin. Drive that thing in there, it will be half in the crank snout & half in the hub.
If this is a Stocker or Super Stocker you should be running a SFI dampener anyway, which will already have a keyway. The crank should already have one. Put the key in and nothing will slip. I would recommend an ATI dampener.

joelster · 06-17-2014, 07:49 PM

Glad you found the problem!

Side note for you guys especially PETE- how many times have you seen LT1 cars break the dowel pin off?

Rich Biebel · 06-17-2014, 07:56 PM

None....

Never broke a thing in there...and don't think the present car owner ever had a failure there either......he has 2 LT-1 stockers

Gutted stock distributer....MSD cap and rotor....crank trigger...

Ed Wright · 06-17-2014, 08:10 PM

I have only seen a couple.

countrypuppy4865 · 06-17-2014, 10:25 PM

I've had 3-4 cam pins break on our cars from 98-2010. I broke one at a bracket race, and I pulled it down found the problem, but I couldn't fix it at the track. I put it back together and runnered up the race like that.

06-17-2014, 08:43 AM	#3
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: LT1 Camaro Timing Issues Cheaper and easier than having keyways cut, you can do like many have done to LT1s with blowers. Drill in from the front, between the crank & hub for a 1/4" roll pin. Drive that thing in there, it will be half in the crank snout & half in the hub. If this is a Stocker or Super Stocker you should be running a SFI dampener anyway, which will already have a keyway. The crank should already have one. Put the key in and nothing will slip. I would recommend an ATI dampener. __________________ Ed Wright 4156 SS/JA

06-17-2014, 07:49 PM	#4
joelster Member Join Date: Nov 2007 Location: Tonawanda, NY Posts: 106 Likes: 0 Liked 0 Times in 0 Posts	Re: LT1 Camaro Timing Issues Glad you found the problem! Side note for you guys especially PETE- how many times have you seen LT1 cars break the dowel pin off?

06-17-2014, 07:56 PM	#5
Rich Biebel VIP Member Join Date: Jun 2007 Location: Northern New Jersey suburbs Posts: 2,314 Likes: 25 Liked 544 Times in 213 Posts	Re: LT1 Camaro Timing Issues None.... Never broke a thing in there...and don't think the present car owner ever had a failure there either......he has 2 LT-1 stockers Gutted stock distributer....MSD cap and rotor....crank trigger... __________________ Rich Biebel S/C 1479 Stock 147R

06-17-2014, 08:10 PM	#6
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: LT1 Camaro Timing Issues I have only seen a couple. __________________ Ed Wright 4156 SS/JA

06-17-2014, 10:25 PM	#7
countrypuppy4865 Senior Member Join Date: Nov 2003 Location: Donaldsonville, LA Posts: 980 Likes: 17 Liked 228 Times in 70 Posts	Re: LT1 Camaro Timing Issues I've had 3-4 cam pins break on our cars from 98-2010. I broke one at a bracket race, and I pulled it down found the problem, but I couldn't fix it at the track. I put it back together and runnered up the race like that. __________________ Jimmy "Cooter" Hidalgo, Jr. 4865 E/SA '04 GTO 4865 SS/GA '99 Firebird

06-14-2014, 08:38 PM	#1
Rich Biebel VIP Member Join Date: Jun 2007 Location: Northern New Jersey suburbs Posts: 2,314 Likes: 25 Liked 544 Times in 213 Posts	Re: LT1 Camaro Timing Issues Line up your crank trigger wheel and timing pointer on number one cylinder.......pull the cap off and see where the rotor is pointing to in the cap.....if something happened to the distributer or cam you should see it there...Rotor should be pointing somewhere close to number one terminal in the cap. I would bet it is not....and something failed like Lee pointed to..... Do you send the crank trigger signal into your ECU and then to your ignition box......or bypass the ECU and direct to the ignition box with locked timing....? I ran my LT-1 with locked timing and did not use the ECU to change the timing..... __________________ Rich Biebel S/C 1479 Stock 147R

06-16-2014, 10:43 PM	#2
camaro95 Junior Member Join Date: Nov 2013 Location: Minnesota Posts: 5 Likes: 0 Liked 0 Times in 0 Posts	Re: LT1 Camaro Timing Issues Thanks everyone for the info. Found rotor hub had slipped causing #2 cylinder to fire when #1 was suppose to. Not sure what caused it to slip, no damage to the rotor or cap was seen. Runs good now, hopefully no damage from the backfiring at high rpm