HELP Running lean with 50lbs injectors - Page 5

04 Mach1 · 12-14-2005, 07:48 PM

same cam

04 Mach1 · 12-14-2005, 07:54 PM

Now ya have me thinking. Before it was dot to dot. When I went to the 50s I also set the cam 4 degrees advance. Thought that would bring my power band down in the lower RPMs. But I just can't get myself to beleive 4 degrees could cause this. Maybe I need to put it back to straight up.

QWKSNKE · 12-14-2005, 08:05 PM

You have to watch degreeing cams. Lot of the cams out there nowadays will have so much advance or retard built in them.

I know its a pain in the a** but I would put the cam back 'dot to dot'. I gotta feeling its going to fix your problem.

04 Mach1 · 12-14-2005, 08:21 PM

Ya thats what I'm thinking. That gives me something to do tommorow. I'll let ya now what happens I have a sick feeling thats going to be it.

Italian LX · 12-15-2005, 05:29 AM

Quote:

Originally Posted by 04 Mach1

Now ya have me thinking. Before it was dot to dot. When I went to the 50s I also set the cam 4 degrees advance. Thought that would bring my power band down in the lower RPMs. But I just can't get myself to beleive 4 degrees could cause this. Maybe I need to put it back to straight up.

Actually, the problem seems to be caused by retarded cam timing. Are you positive that you did, in fact, advance the cam?

I'm with Lee on this -- pull the cover and TDC that cam for now.

Shankin · 12-15-2005, 06:37 AM

What are you using to measure air fuel. If you are using the autometer with the stock o2 you are pissing in the wind. All that does is tell you if the o2 is switching. Unplugging the mass sir with 50s will make it so rich it will foul the plugs out in no time. Get that thing to a dyno with a real wideband then make your next move. Headers glowing red is usually from Low Initial Timing. Double check the balancer and make sure its not spun or damaged. Keep us informed.

coupe · 12-15-2005, 08:42 AM

Put that cam in straight-up. It probably has a 112Âº LSA and a 108Âº intake centerline? That means it's got 4Âº advance built in.

Edit: post #1000

Shankin · 12-15-2005, 09:02 AM

degreeing the cam in at 6 degrees advanced will only lower the power curve where it comes in faster. Exaclyy how did you degree the cam? was it with a degree wheel.

04 Mach1 · 12-15-2005, 04:36 PM

No degree wheel. On the cranksproket there are 3 position went with the on that had A on it. I talk to a couple of engine builders and they say 4 degrees either way won't(shouldn't) cause the headers to glow it just moves the powerband up or down. Talked to another person who said I MUST HAVE A CHIP OR PROGRAM. I plan on pulling the cover off tonight, But I agree with shankin if I unplug the meter it should foul the plugs in a matter of seconds due to the 50s and it don't.

QWKSNKE · 12-15-2005, 04:47 PM

yes a chip or programmer would definitely benefit you but I still think the cam being installed 'straight up' is the root problem.

12-14-2005, 07:48 PM	#41
04 Mach1 Bet I red light B4U Join Date: Aug 2005 Location: ANNISTON, AL Posts: 975	Re: HELP Running lean with 50lbs injectors same cam

12-14-2005, 07:54 PM	#42
04 Mach1 Bet I red light B4U Join Date: Aug 2005 Location: ANNISTON, AL Posts: 975	Re: HELP Running lean with 50lbs injectors Now ya have me thinking. Before it was dot to dot. When I went to the 50s I also set the cam 4 degrees advance. Thought that would bring my power band down in the lower RPMs. But I just can't get myself to beleive 4 degrees could cause this. Maybe I need to put it back to straight up.

12-14-2005, 08:05 PM	#43
QWKSNKE 3v's are slow Join Date: Dec 2004 Location: Here and There Posts: 17,152	Re: HELP Running lean with 50lbs injectors You have to watch degreeing cams. Lot of the cams out there nowadays will have so much advance or retard built in them. I know its a pain in the a** but I would put the cam back 'dot to dot'. I gotta feeling its going to fix your problem. __________________ 2009 Porsche Carrera S 2008 ///AMG C63.. Eurocharge Tune. RIP 2019 AMG GLC43..wife's 03 F250 SD.. Edge Evo, AFE Stage 1 CAI 08 GT. JBA axle back, FRPP springs, FRPP swaybars.. daughter's 01 Cobra vert... wife's I need a new toy

12-14-2005, 08:21 PM	#44
04 Mach1 Bet I red light B4U Join Date: Aug 2005 Location: ANNISTON, AL Posts: 975	Re: HELP Running lean with 50lbs injectors Ya thats what I'm thinking. That gives me something to do tommorow. I'll let ya now what happens I have a sick feeling thats going to be it.

12-15-2005, 06:37 AM	#46
Shankin Senior Member Join Date: Jul 2005 Posts: 339	Re: HELP Running lean with 50lbs injectors What are you using to measure air fuel. If you are using the autometer with the stock o2 you are pissing in the wind. All that does is tell you if the o2 is switching. Unplugging the mass sir with 50s will make it so rich it will foul the plugs out in no time. Get that thing to a dyno with a real wideband then make your next move. Headers glowing red is usually from Low Initial Timing. Double check the balancer and make sure its not spun or damaged. Keep us informed. __________________ Pro Speed Performance 770 222 5015

12-15-2005, 08:42 AM	#47
coupe Super Moderator Join Date: Dec 2004 Posts: 6,313	Re: HELP Running lean with 50lbs injectors Put that cam in straight-up. It probably has a 112Âº LSA and a 108Âº intake centerline? That means it's got 4Âº advance built in. Edit: post #1000 __________________ " If you can't explain it simply, you don't understand it well enough. " - Albert Einstein

12-15-2005, 09:02 AM	#48
Shankin Senior Member Join Date: Jul 2005 Posts: 339	Re: HELP Running lean with 50lbs injectors degreeing the cam in at 6 degrees advanced will only lower the power curve where it comes in faster. Exaclyy how did you degree the cam? was it with a degree wheel. __________________ Pro Speed Performance 770 222 5015

12-15-2005, 04:36 PM	#49
04 Mach1 Bet I red light B4U Join Date: Aug 2005 Location: ANNISTON, AL Posts: 975	Re: HELP Running lean with 50lbs injectors No degree wheel. On the cranksproket there are 3 position went with the on that had A on it. I talk to a couple of engine builders and they say 4 degrees either way won't(shouldn't) cause the headers to glow it just moves the powerband up or down. Talked to another person who said I MUST HAVE A CHIP OR PROGRAM. I plan on pulling the cover off tonight, But I agree with shankin if I unplug the meter it should foul the plugs in a matter of seconds due to the 50s and it don't.

12-15-2005, 04:47 PM	#50
QWKSNKE 3v's are slow Join Date: Dec 2004 Location: Here and There Posts: 17,152	Re: HELP Running lean with 50lbs injectors yes a chip or programmer would definitely benefit you but I still think the cam being installed 'straight up' is the root problem. __________________ 2009 Porsche Carrera S 2008 ///AMG C63.. Eurocharge Tune. RIP 2019 AMG GLC43..wife's 03 F250 SD.. Edge Evo, AFE Stage 1 CAI 08 GT. JBA axle back, FRPP springs, FRPP swaybars.. daughter's 01 Cobra vert... wife's I need a new toy