new exhaust and carb tuning - The 1947 - Present Chevrolet & GMC Truck Message Board Network

chevyforever · 03-15-2004, 01:48 AM

i just barely got done putting my new magnaflow magna paks on my truck and i am wondering if i will now have to readjust my carb to make up for the increased exhaust flow vs. when it had the el' cheapo high restriction mufflers.

chevyforever

70ChevyLongbed · 03-15-2004, 11:41 AM

I can't tell you how to do it... but I think the answer is 'yes' you will want to tune it. I say this because I am switching from manifolds to headers and the engine guy that helps me told me we would have to tune it again after installing the headers.

I also wanted to reply, cuz I'm interested

I always believe this guy, but sometimes it's good to get additional opinions.

mtdave2 · 03-15-2004, 12:46 PM

dont ya just love those magna flows. the sound keeps getting better and better. its been one year sence i did mine, they sound even better now.

retune is a good idea too

chevyforever · 03-16-2004, 12:41 AM

i love the sound of these things. a retune is in the works but i gotta get my new radiator first cuz the da*n thing just started a geyser on me this morning on my way to work. by reading the plugs it is running just a little bit leaner with the better flowing exhaust, an easy fix though.
all i can say about the magnaflows is they are awesome and well worth the money, i got mine for cost though because of a local muffler shop that went out of business and wanted to get rid of inventory, i got them for 60 bucks a piece, not too bad at all.
chevyforever

03-15-2004, 01:48 AM	#1
chevyforever Some like em' long! Join Date: Nov 2002 Location: Grace, Idaho Posts: 69	new exhaust and carb tuning i just barely got done putting my new magnaflow magna paks on my truck and i am wondering if i will now have to readjust my carb to make up for the increased exhaust flow vs. when it had the el' cheapo high restriction mufflers. chevyforever __________________ 1971 chevy c10 lwb- 300 hp 350 crate motor, soon to be more with ported and polished 62cc chamber 461 double humps, TH400, 3.73 posi, used to be my uncle's truck 1972 chevy k10 lwb- 350,4 spd, old and tired, dad bought brand new and is now mine 1968 chevy c20 lwb- 327, 4 spd, was originally a 50th anniversary truck 1990 GMC K1500-just my runaround truck 1982 Chevy K10 shortbed, new motor and new paint, another project in the mix of the others. IMPORTS SUCK!

03-15-2004, 11:41 AM	#2
70ChevyLongbed Howzit?!? Join Date: Jan 2003 Location: Maryville, TN Posts: 1,265	I can't tell you how to do it... but I think the answer is 'yes' you will want to tune it. I say this because I am switching from manifolds to headers and the engine guy that helps me told me we would have to tune it again after installing the headers. I also wanted to reply, cuz I'm interested I always believe this guy, but sometimes it's good to get additional opinions. __________________ Jason Hawaiian-J 70 Longbed, 307, Edelbrock Carb 1404, Edelbrock Intake 2101, Dual Roller Timing chain and gears, 214/214 cam, Comp Roller Rockers, dual Flowmasters. 1999 Chevy Tahoe 2004 Mini Cooper S 71 BMW 2002 - Sold

03-15-2004, 12:46 PM	#3
mtdave2 newly minted old timer Join Date: Dec 1999 Location: Hudson WI Posts: 3,521	dont ya just love those magna flows. the sound keeps getting better and better. its been one year sence i did mine, they sound even better now. retune is a good idea too __________________ ____________________________________________ 72 c20 longhorn 65k org miles and counting! 69 k10 Suburban

03-16-2004, 12:41 AM	#4
chevyforever Some like em' long! Join Date: Nov 2002 Location: Grace, Idaho Posts: 69	i love the sound of these things. a retune is in the works but i gotta get my new radiator first cuz the da*n thing just started a geyser on me this morning on my way to work. by reading the plugs it is running just a little bit leaner with the better flowing exhaust, an easy fix though. all i can say about the magnaflows is they are awesome and well worth the money, i got mine for cost though because of a local muffler shop that went out of business and wanted to get rid of inventory, i got them for 60 bucks a piece, not too bad at all. chevyforever __________________ 1971 chevy c10 lwb- 300 hp 350 crate motor, soon to be more with ported and polished 62cc chamber 461 double humps, TH400, 3.73 posi, used to be my uncle's truck 1972 chevy k10 lwb- 350,4 spd, old and tired, dad bought brand new and is now mine 1968 chevy c20 lwb- 327, 4 spd, was originally a 50th anniversary truck 1990 GMC K1500-just my runaround truck 1982 Chevy K10 shortbed, new motor and new paint, another project in the mix of the others. IMPORTS SUCK!



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