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69 Hemi is breaking up at 3200 rpm. Its Fixed!!!! #1241671 05/29/12 10:59 AM 05/29/12 10:59 AM
Joined: Mar 2006 Posts: 579 Wattsburg, Pa D Dr V OP mopar
Dr V OP mopar D Joined: Mar 2006 Posts: 579 Wattsburg, Pa	Well, I have the hemi back in my 69 black RR. Custom 3000 stall, motor is 40 over with orig manifolds, mild cam, brand new restored orig carbs, new firecore wires, mopar electronic ign, electric and mech fuel pump with 10 psi at idle and 6 psi under full throttle. Car idles wonderful and rips the tires off from the line but it seems to break up (seems electrical) at about 3200 rpms when the pedal is to the floor. Seems to choke and it wont pull hard all the way. Im at my wits end. 69 1/2 A12 BEE 4 spd 1968 Charger 383 1970 Roadrunner 440+6 Survivor 2019 Redeye 2005 FORD GT Red/White 2017 Viper ACR Extreme Red/White 1979 Branco Red/Red 2018 Porsche GT3 Miami 1971 440+6 Cuda 4 speed V2 2020 Sebring Orange Vette 1979 Chevy Boogie Hippie Van

Re: 69 Hemi is breaking up at 3200 rpm. Help! [Re: Dr V] #1241672 05/29/12 11:06 AM 05/29/12 11:06 AM
Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio Challenger 1 Too Many Posts
Challenger 1 Too Many Posts Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio	My I have installed 3 brand new MP distributers right out of the box. All 3 would breakup under load, I ohmed the pickups and all three were different than stock pickups that I had laying around. So I installed used pick ups in all 3 distributers and the breaking up went away. 3 times I experienced this with MP distributers and all 3 times replacement pickup fixed the problem.

Re: 69 Hemi is breaking up at 3200 rpm. Help! [Re: Dr V] #1241673 05/29/12 11:10 AM 05/29/12 11:10 AM
Joined: Mar 2006 Posts: 579 Wattsburg, Pa D Dr V OP mopar
Dr V OP mopar D Joined: Mar 2006 Posts: 579 Wattsburg, Pa	Ya know, I am leaning towrds the distributor too, Its the only thing that I havent replaced. Literally!! I changed the box from orange to chrome, no change. Do I just order a new one from mancini or summit? Whats best?? 69 1/2 A12 BEE 4 spd 1968 Charger 383 1970 Roadrunner 440+6 Survivor 2019 Redeye 2005 FORD GT Red/White 2017 Viper ACR Extreme Red/White 1979 Branco Red/Red 2018 Porsche GT3 Miami 1971 440+6 Cuda 4 speed V2 2020 Sebring Orange Vette 1979 Chevy Boogie Hippie Van

Re: 69 Hemi is breaking up at 3200 rpm. Help! [Re: Dr V] #1241674 05/29/12 11:22 AM 05/29/12 11:22 AM
Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio Challenger 1 Too Many Posts
Challenger 1 Too Many Posts Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio	Got any old distributers laying around that you could borrow a pickup from to see if it's the problem?

Re: 69 Hemi is breaking up at 3200 rpm. Help! [Re: Challenger 1] #1241675 05/29/12 11:29 AM 05/29/12 11:29 AM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	try disconnecting the vac advance & see if that makes it better or worse. rotor phasing. live every 24 hour block of time like it's your last day on earth

Re: 69 Hemi is breaking up at 3200 rpm. Help! [Re: Challenger 1] #1241676 05/29/12 11:48 AM 05/29/12 11:48 AM
Joined: Mar 2006 Posts: 579 Wattsburg, Pa D Dr V OP mopar
Dr V OP mopar D Joined: Mar 2006 Posts: 579 Wattsburg, Pa	All I have at home is an original points dist that came out of my 68 charger 383. 69 1/2 A12 BEE 4 spd 1968 Charger 383 1970 Roadrunner 440+6 Survivor 2019 Redeye 2005 FORD GT Red/White 2017 Viper ACR Extreme Red/White 1979 Branco Red/Red 2018 Porsche GT3 Miami 1971 440+6 Cuda 4 speed V2 2020 Sebring Orange Vette 1979 Chevy Boogie Hippie Van

Re: 69 Hemi is breaking up at 3200 rpm. Help! [Re: RapidRobert] #1241677 05/29/12 12:00 PM 05/29/12 12:00 PM
Joined: Mar 2006 Posts: 579 Wattsburg, Pa D Dr V OP mopar
Dr V OP mopar D Joined: Mar 2006 Posts: 579 Wattsburg, Pa	RapidRobert, I run the car with it plugged. 69 1/2 A12 BEE 4 spd 1968 Charger 383 1970 Roadrunner 440+6 Survivor 2019 Redeye 2005 FORD GT Red/White 2017 Viper ACR Extreme Red/White 1979 Branco Red/Red 2018 Porsche GT3 Miami 1971 440+6 Cuda 4 speed V2 2020 Sebring Orange Vette 1979 Chevy Boogie Hippie Van

Re: 69 Hemi is breaking up at 3200 rpm. Help! [Re: Dr V] #1241678 05/29/12 12:58 PM 05/29/12 12:58 PM
Joined: Sep 2005 Posts: 580 North Carolina, USA S Silverbullet2 mopar
Silverbullet2 mopar S Joined: Sep 2005 Posts: 580 North Carolina, USA	Not champion spark plugs is it?

Re: 69 Hemi is breaking up at 3200 rpm. Help! [Re: Silverbullet2] #1241679 05/29/12 01:08 PM 05/29/12 01:08 PM
Joined: Mar 2006 Posts: 579 Wattsburg, Pa D Dr V OP mopar
Dr V OP mopar D Joined: Mar 2006 Posts: 579 Wattsburg, Pa	Quote: Not champion spark plugs is it? I run autolite 85 in all my big blocks. Just ordered a new distributor to see if it fixes it, its the only thing left... At worst, I will have a spare one now. 69 1/2 A12 BEE 4 spd 1968 Charger 383 1970 Roadrunner 440+6 Survivor 2019 Redeye 2005 FORD GT Red/White 2017 Viper ACR Extreme Red/White 1979 Branco Red/Red 2018 Porsche GT3 Miami 1971 440+6 Cuda 4 speed V2 2020 Sebring Orange Vette 1979 Chevy Boogie Hippie Van

Re: 69 Hemi is breaking up at 3200 rpm. Help! [Re: Dr V] #1241680 05/29/12 01:58 PM 05/29/12 01:58 PM
Joined: Nov 2003 Posts: 5,048 Atlanta Indiana D Dave Watt master
Dave Watt master D Joined: Nov 2003 Posts: 5,048 Atlanta Indiana	I agree to change out the distributor pickup first. How old are the valve springs? What brand are they? My buddy's Hemi had Mopar Performance "Hemi" valve springs in it, wouldn't rev up anymore. We went through the carb and distributor, then fuel pump before finally checking the springs. They were shot.

Re: 69 Hemi is breaking up at 3200 rpm. Help! [Re: Dr V] #1241681 05/29/12 01:59 PM 05/29/12 01:59 PM
Joined: Aug 2007 Posts: 1,271 Vista, California 6 67Satty pro stock
67Satty pro stock 6 Joined: Aug 2007 Posts: 1,271 Vista, California	maybe try setting the reluctor gap? My 440 with a brand-new distributor was doing the same thing. I checked and found the reluctor gap was set a mile wide. I reset it to .008 and all was fine.

Re: 69 Hemi is breaking up at 3200 rpm. Help! [Re: Dave Watt] #1241682 05/29/12 02:04 PM 05/29/12 02:04 PM
Joined: Mar 2006 Posts: 579 Wattsburg, Pa D Dr V OP mopar
Dr V OP mopar D Joined: Mar 2006 Posts: 579 Wattsburg, Pa	Quote: I agree to change out the distributor pickup first. How old are the valve springs? What brand are they? My buddy's Hemi had Mopar Performance "Hemi" valve springs in it, wouldn't rev up anymore. We went through the carb and distributor, then fuel pump before finally checking the springs. They were shot. Dave, springs are brand new, I wanna say eagle or comp but not for sure. Car has 8 miles on it since total full rebuild and machine work.. 69 1/2 A12 BEE 4 spd 1968 Charger 383 1970 Roadrunner 440+6 Survivor 2019 Redeye 2005 FORD GT Red/White 2017 Viper ACR Extreme Red/White 1979 Branco Red/Red 2018 Porsche GT3 Miami 1971 440+6 Cuda 4 speed V2 2020 Sebring Orange Vette 1979 Chevy Boogie Hippie Van

Re: 69 Hemi is breaking up at 3200 rpm. Help! [Re: 67Satty] #1241683 05/29/12 02:05 PM 05/29/12 02:05 PM
Joined: Mar 2006 Posts: 579 Wattsburg, Pa D Dr V OP mopar
Dr V OP mopar D Joined: Mar 2006 Posts: 579 Wattsburg, Pa	Quote: maybe try setting the reluctor gap? My 440 with a brand-new distributor was doing the same thing. I checked and found the reluctor gap was set a mile wide. I reset it to .008 and all was fine. [/quote That is the gap between the 8 fins and the pickup???? 69 1/2 A12 BEE 4 spd 1968 Charger 383 1970 Roadrunner 440+6 Survivor 2019 Redeye 2005 FORD GT Red/White 2017 Viper ACR Extreme Red/White 1979 Branco Red/Red 2018 Porsche GT3 Miami 1971 440+6 Cuda 4 speed V2 2020 Sebring Orange Vette 1979 Chevy Boogie Hippie Van

Re: 69 Hemi is breaking up at 3200 rpm. Help! [Re: Dr V] #1241684 05/29/12 02:12 PM 05/29/12 02:12 PM
Joined: Aug 2007 Posts: 1,271 Vista, California 6 67Satty pro stock
67Satty pro stock 6 Joined: Aug 2007 Posts: 1,271 Vista, California	Yeah, that one. You're supposed to use a brass feeler gauge. The spec is .008 for 440s. I don't know if it's the same for Hemis. It's best to have the distributor out to set it, that way you can spin it through some revolutions because there are going to be tight and loose spots since it's not going to spin perfectly with no runout. For example, I set mine with the distributor in the car just in one spot. Then fired up the motor and ended up with some little plastic shavings where it found a tight spot in the rotation.

Re: 69 Hemi is breaking up at 3200 rpm. Help! [Re: 67Satty] #1241685 05/29/12 02:29 PM 05/29/12 02:29 PM
Joined: Mar 2006 Posts: 579 Wattsburg, Pa D Dr V OP mopar
Dr V OP mopar D Joined: Mar 2006 Posts: 579 Wattsburg, Pa	So the gap for each fin should be .008???? Thanks, I will look at that tonight after golf league, If im not seeing straight then tmrw afternoon it is!! Thanks.. 69 1/2 A12 BEE 4 spd 1968 Charger 383 1970 Roadrunner 440+6 Survivor 2019 Redeye 2005 FORD GT Red/White 2017 Viper ACR Extreme Red/White 1979 Branco Red/Red 2018 Porsche GT3 Miami 1971 440+6 Cuda 4 speed V2 2020 Sebring Orange Vette 1979 Chevy Boogie Hippie Van

Re: 69 Hemi is breaking up at 3200 rpm. Help! [Re: Dr V] #1241686 05/29/12 03:38 PM 05/29/12 03:38 PM
Joined: Aug 2007 Posts: 1,271 Vista, California 6 67Satty pro stock
67Satty pro stock 6 Joined: Aug 2007 Posts: 1,271 Vista, California	Yeah, .008. But it's not super critical. It will run fine if it's anywhere close to that. But if it's too wide a gap, like really wide, you will sputter at higher RPMS under load. But set it at it's tightest point. That way you won't be shaving plastic because the distributors, even the new ones don't have perfect runout. Here's a good thread: https://board.moparts.org/ubbthreads/showflat.php?Number=5393292

Re: 69 Hemi is breaking up at 3200 rpm. Help! [Re: Dr V] #1241687 05/29/12 04:19 PM 05/29/12 04:19 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	Quote: So the gap for each fin should be .008???? .008" on the tightest fin, the rest of em may or may not be slightly off live every 24 hour block of time like it's your last day on earth

Re: 69 Hemi is breaking up at 3200 rpm. Help! [Re: RapidRobert] #1241688 05/29/12 04:25 PM 05/29/12 04:25 PM
Joined: Mar 2006 Posts: 579 Wattsburg, Pa D Dr V OP mopar
Dr V OP mopar D Joined: Mar 2006 Posts: 579 Wattsburg, Pa	I will check that gap for sure. What would make it go out of wack? Bad bushing in the shaft or something? 69 1/2 A12 BEE 4 spd 1968 Charger 383 1970 Roadrunner 440+6 Survivor 2019 Redeye 2005 FORD GT Red/White 2017 Viper ACR Extreme Red/White 1979 Branco Red/Red 2018 Porsche GT3 Miami 1971 440+6 Cuda 4 speed V2 2020 Sebring Orange Vette 1979 Chevy Boogie Hippie Van

Re: 69 Hemi is breaking up at 3200 rpm. Help! [Re: Dr V] #1241689 05/29/12 04:52 PM 05/29/12 04:52 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	locking screw loose or gap set incorrectly in the beginning live every 24 hour block of time like it's your last day on earth

Re: 69 Hemi is breaking up at 3200 rpm. Help! [Re: RapidRobert] #1241690 05/29/12 05:03 PM 05/29/12 05:03 PM
Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio Challenger 1 Too Many Posts
Challenger 1 Too Many Posts Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio	Quote: locking screw loose or gap set incorrectly in the beginning I don'tt think they are setup when new, all 3 I did needed the gap set and I'm sure some screws were loose. I think they figure your going to set it up for your engine, there adjustable. Not ready to drop in and run.

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