Flowmasters - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Riptide · 06-03-2002, 10:32 AM

I just got my new exhaust on and o boy is it nice. For any people out there considering getting flowmasters it is well worth it. I used 2" 40 series flowmasters and went all the way back an exited behind the wheels. And it is not to loud in the cab but it sounds sweet outside of the cab.

O yea, when I was doing it I found that the heat riser was stuck shut. So it is permanently open now. So if you think you truck is running a little sh**y and the gas mileage sucks be sure to check out the hear riser.

Smooth68 · 06-03-2002, 11:15 AM

Cool! I've got some 40's sitting in the cab just waiting to be installed someday. Glad to hear you like them. I got the 2.5 in/out and looking to just dump in front of the axle. I like it loud - the wife won't want to ride as often then...

Pont · 06-03-2002, 11:38 AM

I'm also a new fan of the Flowmasters. Just put the Delta 50 series on mine, 2 1/2" and dumped right before the rear axle, also installed some Hooker Comp headers. A big improvement over exhaust manifolds, 24" glasspacks and 2" exhaust. This thing can breathe now!

lukecp · 06-03-2002, 11:44 AM

I'm running 40 series flowmasters on my truck too. The system is 2.5", coming off of a set of headers. they end above and ahead of my rear axle. I ran turndowns for about 6 months on it. It sounded OK, but it wasn't as loud as i wanted. One day, i took off the turndowns to see what it would sound like. It made a huge difference! It made it deeper, throaty, and a lot louder

. Now i can hear the exhaust when i'm going down the highway at 65, but i think thats a good thing. Plus, people turn and look at the truck if i give it a little gas when im driving it around

.

70c10 · 06-03-2002, 01:02 PM

Riptide,
Where's the heatriser?

VNMOUS · 06-03-2002, 01:03 PM

LOVE MY 40'S!!!!!!!!!!!1

Low69CST · 06-03-2002, 01:39 PM

I got 40's, but on 3" pipe, my dad says it looks like a diesel!

Riptide · 06-03-2002, 02:44 PM

The heat riser is located on the driver's side exhaust manifold. Actually its on what I guess would be called the collector. It should open once the motor has reached optimum temperature most don't causing the exhaust from that side of the motor to go through the carb and through the intake back out the passenger side exhaust manifold. My truck seemed to run fine but now that it is open I have probably 30% more horsepower. And you can feel it in the seat.

Wasted Income · 06-04-2002, 12:44 AM

Yellow72custom,

I did the same thing as you. They (dual 40 series 2.5") were turned down before the rear axle and it sounded like a new camaro or mustang with pipes. Took those darn turndowns off, and it was a night and day difference in sound!! It echoes around alot under the bed, increasing the volume ALOT!!

I'm in love.....!

**MikeB** · 06-04-2002, 07:52 AM

Not to upset anyone here, but --- Long live quiet power! I recently heard a 396 Chevelle with Flowmaster 70 series mufflers and resonators and it sounded perfect. It had that great Flowmaster sound without the noise that atttacts police officers.

*67Fleetsidedream* · 06-04-2002, 07:56 AM

I also have the Delta Flow 50s. Very satisfied.
Ben

oleblue72 · 06-04-2002, 08:57 AM

Love Um! Ck the sig.

Riptide · 06-04-2002, 09:20 AM

I agree with Mike I like a suttle quite sound from a far such as the police men driving by, but when I stomp it I like to hear it.

Longhorn · 06-04-2002, 09:34 AM

Thanks for the tip!! Will check hte riser and will just have to do the 40's on the 396

06-03-2002, 10:32 AM	#1
Riptide Registered User Join Date: Apr 2002 Location: McPherson, KS US Posts: 102	Flowmasters I just got my new exhaust on and o boy is it nice. For any people out there considering getting flowmasters it is well worth it. I used 2" 40 series flowmasters and went all the way back an exited behind the wheels. And it is not to loud in the cab but it sounds sweet outside of the cab. O yea, when I was doing it I found that the heat riser was stuck shut. So it is permanently open now. So if you think you truck is running a little sh**y and the gas mileage sucks be sure to check out the hear riser. __________________ 67 Chevy C10 McPherson, Ks "Remember Don't Sweat the Petty Things, Pet the Sweaty Things"

06-03-2002, 11:15 AM	#2
Smooth68 Registered User Join Date: Aug 2001 Location: West Fork, Arkansas - Razorback Country Posts: 1,826	Cool! I've got some 40's sitting in the cab just waiting to be installed someday. Glad to hear you like them. I got the 2.5 in/out and looking to just dump in front of the axle. I like it loud - the wife won't want to ride as often then... __________________ Smooth68's Web Site WTB 64-66 project or frame/cab, SWB or LWB...I have the fever! Whatcha got?? '68 Short Step - Shaved Body, Soon Bagged - *SOLD* Driver-2004 GMC Z-71 Ext-cab

06-03-2002, 11:38 AM	#3
Pont I need another Barley Pop Join Date: Feb 2001 Location: Grants Pass, OR Posts: 1,629	I'm also a new fan of the Flowmasters. Just put the Delta 50 series on mine, 2 1/2" and dumped right before the rear axle, also installed some Hooker Comp headers. A big improvement over exhaust manifolds, 24" glasspacks and 2" exhaust. This thing can breathe now! __________________ 67 Short Fleet 4x4 04 Honda CRF450R 89 Toyota 4-Runner 34 Ford 2 door sedan - Long term project ---------------------------------------------- There is a very fine line between "hobby" and "mental illness"

06-03-2002, 11:44 AM	#4
lukecp Formerly yellow72custom Join Date: May 2001 Location: Austin, TX Posts: 7,531	I'm running 40 series flowmasters on my truck too. The system is 2.5", coming off of a set of headers. they end above and ahead of my rear axle. I ran turndowns for about 6 months on it. It sounded OK, but it wasn't as loud as i wanted. One day, i took off the turndowns to see what it would sound like. It made a huge difference! It made it deeper, throaty, and a lot louder . Now i can hear the exhaust when i'm going down the highway at 65, but i think thats a good thing. Plus, people turn and look at the truck if i give it a little gas when im driving it around . __________________ '72 Chevy C10 Mild 350/TH350/3.07. Ochre/White. Old high school ride. '70 GMC C2500 '62 327 4bbl/SM465/4.56-geared Dana 60. White/White. Project or parts truck. '97 Saturn SL DD. 1.9/5-speed. 40+ highway mpg

06-03-2002, 01:02 PM	#5
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,857	Riptide, Where's the heatriser? __________________ Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads

06-03-2002, 01:03 PM	#6
VNMOUS Step Side's Rule Join Date: Feb 2002 Location: LEIGHTON,AL USA Posts: 227	LOVE MY 40'S!!!!!!!!!!!1 __________________ DANO 07 Silverado Classic 67shortstep 76 stingray 95 cobra 66 Mustang Coupe 289

06-03-2002, 01:39 PM	#7
Low69CST Registered User Join Date: May 2000 Location: Frankfort, Kentucky, USA Posts: 2,163	I got 40's, but on 3" pipe, my dad says it looks like a diesel! __________________ '69 CST Short fleetside Lowered, 400 small block, 700R4, 4 wheel disc brakes, front sway bar & rear camaro sway bar (in progress) '87 V10 4x4 Short Fleetside Quad Suspension and Dual Tanks

06-03-2002, 02:44 PM	#8
Riptide Registered User Join Date: Apr 2002 Location: McPherson, KS US Posts: 102	The heat riser is located on the driver's side exhaust manifold. Actually its on what I guess would be called the collector. It should open once the motor has reached optimum temperature most don't causing the exhaust from that side of the motor to go through the carb and through the intake back out the passenger side exhaust manifold. My truck seemed to run fine but now that it is open I have probably 30% more horsepower. And you can feel it in the seat. __________________ 67 Chevy C10 McPherson, Ks "Remember Don't Sweat the Petty Things, Pet the Sweaty Things"

06-04-2002, 12:44 AM	#9
Wasted Income Boosted Member Join Date: May 2002 Location: Mackinaw, IL Posts: 2,200	Long live the non-delta 40 series!! Yellow72custom, I did the same thing as you. They (dual 40 series 2.5") were turned down before the rear axle and it sounded like a new camaro or mustang with pipes. Took those darn turndowns off, and it was a night and day difference in sound!! It echoes around alot under the bed, increasing the volume ALOT!! I'm in love.....! __________________ 1972 2wd K/5 Blazer Turbocharged 370 LSx - 941 rwhp / 1093 rwtq 1969 Chevy K-10 L33 5.3 / 4L80E / NP241 / 4" lift 1964 Buick Skylark Twin TURBO 383 LS pro-touring project 2014 VW Passat TDI - Daily Driver Turbo diesel 2015 Sierra Denali HD Duramax Turbo diesel 2016 Ford Explorer Sport - Twin Turbskis 2017 Polaris RZR Turbo 2014 Nor-Tech Center Console - Twin Supercharged Outboards *TURBO ALL THE THINGS!!*

06-04-2002, 07:52 AM	#10
MikeB Senior Member Join Date: Jul 2000 Location: North Texas Posts: 3,430	Not to upset anyone here, but --- Long live quiet power! I recently heard a 396 Chevelle with Flowmaster 70 series mufflers and resonators and it sounded perfect. It had that great Flowmaster sound without the noise that atttacts police officers. __________________ Mike 1969 C10 LWB -- owned for 34 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 23 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then!

06-04-2002, 07:56 AM	#11
67Fleetsidedream Wiseass secured himself a BAN Join Date: Nov 2000 Location: MOON!!! Posts: 2,282	I also have the Delta Flow 50s. Very satisfied. Ben

06-04-2002, 08:57 AM	#12
oleblue72 No, U Da Man! Join Date: Mar 2001 Location: Southaven, MS Posts: 284	Love Um! Ck the sig. __________________ (sold ole blue 1972) 1997 Dodge 1500 5.9L 1996 Saturn SL2 1.9L 2002 Mitsubishi Montero 3.0L 2005 Ford Escape 3.0L *1967 Olds Vista Cruiser 330-320HP*

06-04-2002, 09:20 AM	#13
Riptide Registered User Join Date: Apr 2002 Location: McPherson, KS US Posts: 102	I agree with Mike I like a suttle quite sound from a far such as the police men driving by, but when I stomp it I like to hear it. __________________ 67 Chevy C10 McPherson, Ks "Remember Don't Sweat the Petty Things, Pet the Sweaty Things"

06-04-2002, 09:34 AM	#14
Longhorn Registered User Join Date: Mar 2001 Location: Rapid City, South Dakota Posts: 222	Thanks for the tip!! Will check hte riser and will just have to do the 40's on the 396 __________________ Bill Rapid City, SD 67 short stepside, in weeds 6Cyl 69 Longhorn CST 396 nice original



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