24# injector problems with Pro-M 77mm HELP!

5.0-man · 01-07-2001, 05:28 PM

Ever since my new N/A combo was in, I've been having a rich idle problem. I read on a thread that this is a known problem with 24# and pro-m. My signature is on the bottom with my combo. Can you guys tell me if I can run 30# injectors with this N/A combo without being too rich? And also, in the future, I plan to put on an S-trim vortech. Will 30#ers be enough for the supercharger too? I think 36#ers would be better for my combo with the charger but I would hate to buy 30s for now and then have to buys 36ers again later!! Any advice???????????????????

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1989 LX Coupe, N/A 306. Pro-M 77mm,70mm T.body,Edelbrock RPM intake,TrickFlow heads,Crane cam,Eagle rods,10.1 pistons,Hooker long tubes,MSD 6-AL,C-4 W/3800 stall,4.11 gears,SSM's 12.33 @ 110 mph. Car is still being dialed in. Pictures and info on my webpage. (LA Mustangs) http://www.louisianamustangs.com

Five0 · 01-07-2001, 09:17 PM

I run a Pro-M 75 mm w/30# injectors with no problem. I don't know about the rest of your questions. Check out my sig for all of my mods.

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James Cox
nochevy@hotmail.com
1991 Mustang LX
Best 1/8 time on motor 7.686 @90.20mph

01-07-2001, 09:36 PM

I also run N/A with a ProM 77 and 30# injectors and never had any problems with them.

LX XLR8R · 01-07-2001, 09:42 PM

i run 24# with pro-m 77 with no problems..the only time i am way rich is at an idle but i have no emmisions and a heavy overlap in my cam

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1987 black notch(ex 4 banger)
DSS 306 w/ main support...Elderbrock 6028 heads..gt-40 intake..24# injectors...70 mm tb..77 pro-m...accel 300+..mac full legnth..tremec w/ pro5oh...full MAC exhaust,off road h-pipe,long tubes, catback...ron davis radiator..subframes, control arms...CFDF II..o yea holley FPR sucks..dont buy one..

jimberg · 01-07-2001, 10:49 PM

Are you running 3/4" reach plugs or stock length plugs? Running stock plugs in a TFS head could cause symptoms of running rich.

Is your MAF meter calibrated for 24# injectors? If it was calibrated for 19# the computer is opening the injectors longer than it should. That problem would be corrected by the computer after a while, though. How long have you had the problem?

I have a Pro-M 77 running with 24# injectors and my idle is fine.

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351W 89 Mustang GT Convertible

01-07-2001, 05:28 PM	#1
5.0-man Registered Member Join Date: Oct 1999 Location: Louisiana Posts: 119	24# injector problems with Pro-M 77mm HELP! Ever since my new N/A combo was in, I've been having a rich idle problem. I read on a thread that this is a known problem with 24# and pro-m. My signature is on the bottom with my combo. Can you guys tell me if I can run 30# injectors with this N/A combo without being too rich? And also, in the future, I plan to put on an S-trim vortech. Will 30#ers be enough for the supercharger too? I think 36#ers would be better for my combo with the charger but I would hate to buy 30s for now and then have to buys 36ers again later!! Any advice??????????????????? ------------------ 1989 LX Coupe, N/A 306. Pro-M 77mm,70mm T.body,Edelbrock RPM intake,TrickFlow heads,Crane cam,Eagle rods,10.1 pistons,Hooker long tubes,MSD 6-AL,C-4 W/3800 stall,4.11 gears,SSM's 12.33 @ 110 mph. Car is still being dialed in. Pictures and info on my webpage. (LA Mustangs) http://www.louisianamustangs.com

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01-07-2001, 09:17 PM	#2
Five0 Registered Member Join Date: Apr 2000 Location: middleburg, fl, usa Posts: 1,134	I run a Pro-M 75 mm w/30# injectors with no problem. I don't know about the rest of your questions. Check out my sig for all of my mods. ------------------ James Cox nochevy@hotmail.com 1991 Mustang LX Best 1/8 time on motor 7.686 @90.20mph

01-07-2001, 09:36 PM	#3
stanglx347 Guest Posts: n/a	I also run N/A with a ProM 77 and 30# injectors and never had any problems with them.

01-07-2001, 09:42 PM	#4
LX XLR8R Dirk Diggler Join Date: Feb 1999 Location: SLOATSBURG, NY Posts: 1,931	i run 24# with pro-m 77 with no problems..the only time i am way rich is at an idle but i have no emmisions and a heavy overlap in my cam ------------------ 1987 black notch(ex 4 banger) DSS 306 w/ main support...Elderbrock 6028 heads..gt-40 intake..24# injectors...70 mm tb..77 pro-m...accel 300+..mac full legnth..tremec w/ pro5oh...full MAC exhaust,off road h-pipe,long tubes, catback...ron davis radiator..subframes, control arms...CFDF II..o yea holley FPR sucks..dont buy one..

01-07-2001, 10:49 PM	#5
jimberg Registered Member Join Date: Oct 1998 Location: Rogers, MN Posts: 2,089	Are you running 3/4" reach plugs or stock length plugs? Running stock plugs in a TFS head could cause symptoms of running rich. Is your MAF meter calibrated for 24# injectors? If it was calibrated for 19# the computer is opening the injectors longer than it should. That problem would be corrected by the computer after a while, though. How long have you had the problem? I have a Pro-M 77 running with 24# injectors and my idle is fine. ------------------ 351W 89 Mustang GT Convertible