Swapped the carb, question though?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

nicolas72gmc · 09-08-2009, 12:34 AM

I posted a thread on swapping out my 1407 edelbrock for a 1406 or 1405. I did just that. It solved the off idle stumble problem, as I was running too big of a carb. It definitely runs alot better now, but I'm thinking my 3" dual exhaust is hurting me now. The lower end power is alot better, but the upper end is not what it used to be. Should I drop the 3" and go with 2.5"? I just wanted to give a big shout out to Charles (board member) for swapping me carbs. He was awesome to deal with, told me to try the carb, and if I didn't like it I could just send it back. Thanks Charles you rock!!

prostreetC-10 · 09-08-2009, 12:52 AM

Part of it is that you went from a 750 down to a 600. 3" id pretty big anyway but I don't think that is why you are loosing enough top end to feel it though. It's something, more than likely, in the carb/fuel delivery.

Tx Firefighter · 09-08-2009, 06:49 AM

I've always found too big of exhaust loses low end torque, not top end.

09-08-2009, 12:34 AM	#1
nicolas72gmc Registered User Join Date: Aug 2008 Location: Sunny Arizona Posts: 525	Swapped the carb, question though?? I posted a thread on swapping out my 1407 edelbrock for a 1406 or 1405. I did just that. It solved the off idle stumble problem, as I was running too big of a carb. It definitely runs alot better now, but I'm thinking my 3" dual exhaust is hurting me now. The lower end power is alot better, but the upper end is not what it used to be. Should I drop the 3" and go with 2.5"? I just wanted to give a big shout out to Charles (board member) for swapping me carbs. He was awesome to deal with, told me to try the carb, and if I didn't like it I could just send it back. Thanks Charles you rock!! __________________ Nick "Everyone has a plan, 'till they get punched in the mouth".........Mike Tyson 1968, GMC, SWB, Project 1972, GMC, LWB, Daily Driver, 383, headers, 2.5"/3" exhaust, 200r4, 3.5/5 ECE components. 1972, C/10, LWB, 350 vortec, th350

09-08-2009, 12:52 AM	#2
prostreetC-10 My Carbon Footprint Join Date: Oct 2008 Location: Orygun Posts: 5,527	Re: Swapped the carb, question though?? Part of it is that you went from a 750 down to a 600. 3" id pretty big anyway but I don't think that is why you are loosing enough top end to feel it though. It's something, more than likely, in the carb/fuel delivery. __________________ A quick "pedalfest" *Still getting loose (carb test)* 496 Initial fire up video! Last edited by prostreetC-10; 09-08-2009 at 12:52 AM.

09-08-2009, 06:49 AM	#3
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: Swapped the carb, question though?? I've always found too big of exhaust loses low end torque, not top end. __________________ I'm on the Instagram- @Gearhead_Kevin



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