44 Series Flowmaster - The 1947 - Present Chevrolet & GMC Truck Message Board Network

MobSled · 10-20-2009, 10:05 PM

Ok guys I just finished installing my Hooker Competition headers on my 77 C10. It has a bone stock 350. I`m gonna install some 44 series tomorrow or saturday but was wondering what size piping I should go with? I pretty much yanked out the old exhaust and am running open headers as of right now so I`m starting from the headers back. I want them dumped before the axle and no cats. Any suggestions or comments will be greatly appreciated.

msgross · 10-20-2009, 10:11 PM

pure dual exhaust on an average engine?

2" or 2.25" max i'd say... go much larger and you'll lose backpressure...

BTW, i'm no exhaust expert, but I did stay at a Holiday Inn once...

bitchin85 · 10-20-2009, 10:12 PM

i wouldnt go smaller then 2 1/4 and no bigger then 3 inch. especially on a stock motor. i have 2 1/2 inch pipe on mine and its a little more then stock and it sounds and performs great. i have longtubes into cherry bombs and they dump before the axle

Benelli · 10-20-2009, 10:16 PM

I have 2 1/2 on mine, sounds and runs good.

I highly suggest 2 1/2. I think 2" sounds "forced" or "poppy", I think 3" is just..too much for a stock engine.

Either way, tell us what you go with.

MobSled · 10-20-2009, 10:28 PM

Thank you gentlemen greatly appreciate the quick replies. I will go with 2.5 and post back as soon as I get it done.

Thanks again.

MobSled · 10-21-2009, 09:24 PM

Ok guys I ran into a little problem while taking off my exhaust manifold on the driver side. I accidentally hit the dipstick with the manifold and it broke off at the block...what to do??? The end piece of the tube is still stuck in the block.

*SMiller* · 10-21-2009, 09:33 PM

2 1\2in. exhaust as others have said.

3r!c84 · 10-21-2009, 09:45 PM

Quote:

Originally Posted by msgross

pure dual exhaust on an average engine?

2" or 2.25" max i'd say... go much larger and you'll lose backpressure...

BTW, i'm no exhaust expert, but I did stay at a Holiday Inn once...

hahaha smart ass

truckincurt · 10-21-2009, 10:50 PM

for your dipstick problem .... get a tap set and tap the dipstick... then screw a bolt into it and pull like a mother &#$^*!

ironroad9c1 · 10-22-2009, 09:42 AM

Avoid the flowcrappers and get a good dynomax ultraflow , or magnaflow mufflers, Much better mufflers for the price, and use 2 1/2 inch pipe, the whole "engine needs backpressure " is a myth. you DONT want backpressure.

http://my.prostreetonline.com/forums...ead.php?t=1639

read up and learn

Pyrotechnic · 10-22-2009, 01:19 PM

I remember a magazine article where they tested several mufflers on a mustang and the open style only made 2-3 more peak HP/TQ than the Flowmaster.

Now if you take a 400HP motor and try to push all the exhaust through one 40 series, I could see where it would be a restriction. If you use two in a true dual setup and include and H or an X pipe, there should be no problem as far as exhaust restriction.

Might not be the best, but man they sure sound cool, especially with long tube headers and no catalytic converters. It's totally different than what brand new trucks with Flowmasters sound like.

fiddy9apache · 10-22-2009, 02:22 PM

im running true dual 2.5in with no cats. i have longtube header and dynatech mufflers with a h-pipe. i have a sound clip if you want to hear it.

MobSled · 10-23-2009, 12:47 AM

Quote:

Originally Posted by truckincurt

for your dipstick problem .... get a tap set and tap the dipstick... then screw a bolt into it and pull like a mother &#$^*!

Tried a tapset today and it didnt work out that well. I`d tap the tube thats stuck in the block and pulled like mother&#$^! just like you said hehehehe and nothing. It wouldnt come out...

MobSled · 10-23-2009, 12:51 AM

By the way I ended up going with the 40 series flowmasters, Hooker Super Comp Headers and true dual dumped before the axle with 2.5 piping. Sounds and performs really nice. Took out alot of restrictions with that old OEM setup. I still have to take out my smogpum and adjust my timing. All in all very satisfied with the result. Now if only I could take out that broken off oil dipstick tube thats stuck in my block hahaha.

Tater · 10-23-2009, 02:36 AM

I have a 90 Jimmy with what I believe to be the 260hp GM crate motor,I don't know for sure because the po did the swap.I have Hooker Comp headers,3"" exhaust,and true duals with no cat's that dump before the axles.I only have one complaint and that's the odor I get when the back window is down.

1979blkchevy · 10-23-2009, 12:49 PM

I have hooker super competion headers (long tubes) with 2.5 super 40s and the 2.5 sounds awsome

purplehavoc · 10-23-2009, 03:31 PM

I run Dynomax long tube headers with 2.5 duals into 40 series flowmasters dumped in front of the rear tires.Love the sound.

As for your dipstick problem,i have had luck using a small slide hammer once the hole has been tapped out.

big10ratrod77 · 10-23-2009, 06:31 PM

you need a little back presure but a lot is not good

hey man im driving a bone stock 77 big ten with 2 1/4 duel exhaust with summit turbo mufflers and an h pipe and it realy woke up my little 350 even with stock manifolds, but that was with a good tune up and carb adjustment.

like when i first got the truck it was stock and it couldnt do much besides churp the tires now the 235's are to small i can bark second

10-20-2009, 10:05 PM	#1
MobSled Registered User Join Date: Oct 2009 Location: Downey, CA Posts: 110	44 Series Flowmaster Ok guys I just finished installing my Hooker Competition headers on my 77 C10. It has a bone stock 350. I`m gonna install some 44 series tomorrow or saturday but was wondering what size piping I should go with? I pretty much yanked out the old exhaust and am running open headers as of right now so I`m starting from the headers back. I want them dumped before the axle and no cats. Any suggestions or comments will be greatly appreciated.

10-20-2009, 10:11 PM	#2
msgross Registered User Join Date: Jul 2006 Location: Central PA Posts: 12,201	Re: 44 Series Flowmaster pure dual exhaust on an average engine? 2" or 2.25" max i'd say... go much larger and you'll lose backpressure... BTW, i'm no exhaust expert, but I did stay at a Holiday Inn once... __________________ The Garage: 1968 K-10 SWB - "Project Money Pit" 1996 Z-71 - "huntin rig" 1969 C-10 LWB (SOLD) "Project flip that truck or else" 1993 Passport, F@rd 1-ton (SOLD)"Project Cousin Eddie" My Garage Build "The 1,000 footer"

10-20-2009, 10:12 PM	#3
bitchin85 Registered User Join Date: Aug 2009 Location: Lambertville MI Posts: 962	Re: 44 Series Flowmaster i wouldnt go smaller then 2 1/4 and no bigger then 3 inch. especially on a stock motor. i have 2 1/2 inch pipe on mine and its a little more then stock and it sounds and performs great. i have longtubes into cherry bombs and they dump before the axle __________________ "I'll keep my guns, money, and freedom. You can keep the "change"

10-20-2009, 10:16 PM	#4
Benelli Watchin the rust grow Join Date: Oct 2008 Location: Western Nebraska Posts: 950	Re: 44 Series Flowmaster I have 2 1/2 on mine, sounds and runs good. I highly suggest 2 1/2. I think 2" sounds "forced" or "poppy", I think 3" is just..too much for a stock engine. Either way, tell us what you go with. __________________ 1979 Chevy K10 (H/D Front end) - 350 w/ Holley Truck Avenger, Weinald Intake manifold, headers, bored .060 over, mild cam, Built up TH350 (TranStar Shift kit) with a part-timed NP203 t-case SOLD ($3,000) 1997 Chevy Silverado 1500 - 4.3 vortec, extended cab, 21 highway MPG, stock. "Red" SOLD ($3,000) 1987 Toyota 4wd Pick-up - work in progress, future DD SOLD ($1,850) 1998 Dodge Ram 2500 Cummins 5spd Quad cab - old 12 valve with some work done 2004 Chevy Silverado - Black, 4x4, 5.3L, stock for now Underneath that rust is a heart of gold

10-20-2009, 10:28 PM	#5
MobSled Registered User Join Date: Oct 2009 Location: Downey, CA Posts: 110	Re: 44 Series Flowmaster Thank you gentlemen greatly appreciate the quick replies. I will go with 2.5 and post back as soon as I get it done. Thanks again.

10-21-2009, 09:24 PM	#6
MobSled Registered User Join Date: Oct 2009 Location: Downey, CA Posts: 110	Re: 44 Series Flowmaster Ok guys I ran into a little problem while taking off my exhaust manifold on the driver side. I accidentally hit the dipstick with the manifold and it broke off at the block...what to do??? The end piece of the tube is still stuck in the block. Last edited by MobSled; 10-21-2009 at 09:25 PM.

10-21-2009, 09:33 PM	#7
SMiller Account Suspended Join Date: Jun 2009 Location: Tipton IN Posts: 81	Re: 44 Series Flowmaster 2 1\2in. exhaust as others have said.

10-21-2009, 10:50 PM	#9
truckincurt Registered User Join Date: Mar 2008 Location: Lockport, NY Posts: 106	Re: 44 Series Flowmaster for your dipstick problem .... get a tap set and tap the dipstick... then screw a bolt into it and pull like a mother &#$^*! __________________ diy or die

10-22-2009, 09:42 AM	#10
ironroad9c1 Master Hater Join Date: Apr 2006 Location: Temple,Tx. Posts: 402	Re: 44 Series Flowmaster Avoid the flowcrappers and get a good dynomax ultraflow , or magnaflow mufflers, Much better mufflers for the price, and use 2 1/2 inch pipe, the whole "engine needs backpressure " is a myth. you DONT want backpressure. http://my.prostreetonline.com/forums...ead.php?t=1639 read up and learn Last edited by ironroad9c1; 10-22-2009 at 09:42 AM.

10-22-2009, 01:19 PM	#11
Pyrotechnic Registered User Join Date: Feb 2007 Location: Austin, TX Posts: 3,930	Re: 44 Series Flowmaster I remember a magazine article where they tested several mufflers on a mustang and the open style only made 2-3 more peak HP/TQ than the Flowmaster. Now if you take a 400HP motor and try to push all the exhaust through one 40 series, I could see where it would be a restriction. If you use two in a true dual setup and include and H or an X pipe, there should be no problem as far as exhaust restriction. Might not be the best, but man they sure sound cool, especially with long tube headers and no catalytic converters. It's totally different than what brand new trucks with Flowmasters sound like. __________________ 1977 GMC Sierra Grande

10-22-2009, 02:22 PM	#12
fiddy9apache Registered User Join Date: Aug 2009 Location: ftw tex Posts: 682	Re: 44 Series Flowmaster im running true dual 2.5in with no cats. i have longtube header and dynatech mufflers with a h-pipe. i have a sound clip if you want to hear it. Last edited by fiddy9apache; 10-22-2009 at 02:23 PM.

10-23-2009, 12:51 AM	#14
MobSled Registered User Join Date: Oct 2009 Location: Downey, CA Posts: 110	Re: 44 Series Flowmaster By the way I ended up going with the 40 series flowmasters, Hooker Super Comp Headers and true dual dumped before the axle with 2.5 piping. Sounds and performs really nice. Took out alot of restrictions with that old OEM setup. I still have to take out my smogpum and adjust my timing. All in all very satisfied with the result. Now if only I could take out that broken off oil dipstick tube thats stuck in my block hahaha.

10-23-2009, 02:36 AM	#15
Tater Cradle Robber Join Date: May 2009 Location: Lily Lake,Illinois Posts: 774	Re: 44 Series Flowmaster I have a 90 Jimmy with what I believe to be the 260hp GM crate motor,I don't know for sure because the po did the swap.I have Hooker Comp headers,3"" exhaust,and true duals with no cat's that dump before the axles.I only have one complaint and that's the odor I get when the back window is down. __________________ "The problem with the world is that everyone is a few drinks behind." Humphrey Bogart "Hippies.They're everywhere.They wanna save the earth,but all they do is smoke pot and smell bad."Eric Cartman "Think about how stupid the average person is,and realize half of them are stupider than that."George Carlin

10-23-2009, 12:49 PM	#16
1979blkchevy Registered User Join Date: Oct 2009 Location: west virgina Posts: 102	Re: 44 Series Flowmaster I have hooker super competion headers (long tubes) with 2.5 super 40s and the 2.5 sounds awsome

10-23-2009, 03:31 PM	#17
purplehavoc Registered User Join Date: Jun 2008 Location: Kenora Ont. Posts: 59	Re: 44 Series Flowmaster I run Dynomax long tube headers with 2.5 duals into 40 series flowmasters dumped in front of the rear tires.Love the sound. As for your dipstick problem,i have had luck using a small slide hammer once the hole has been tapped out. __________________ 09 GMC 2500HD 6.6L 07 F-250 Super Duty V10 03 Chevy Tahoe 82 K5 blazer plow truck,currently under the knife 56 GMC stepside short,also in progress



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10-23-2009, 06:31 PM	#18
big10ratrod77 Registered User Join Date: Aug 2009 Location: hillborough nc Posts: 410	Re: 44 Series Flowmaster you need a little back presure but a lot is not good hey man im driving a bone stock 77 big ten with 2 1/4 duel exhaust with summit turbo mufflers and an h pipe and it realy woke up my little 350 even with stock manifolds, but that was with a good tune up and carb adjustment. like when i first got the truck it was stock and it couldnt do much besides churp the tires now the 235's are to small i can bark second __________________ 77 chevy BIG 10 350/sm465/12bolt w 3.73 bout 240 horse power NO power steerin 79 chevy 1/2 ton 250/three on the tree/3.08s soon to get built 250/floor shift conversion/3.08s 81 mercedes 300d 25 MPG 77 chevy BIG DOOLEY 454/sm-465/14 bolt 4.10s "fully loaded" 73 plymouth duster 225 slant six/230 3 speed/8 1/4 trying to acheve 300 horse six http://www.cardomain.com/ride/3135091 '77 chevy trucks. built to stay tough. life is short build a hot rod

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