Flowmaster Cat Back and a Haibeck chip - Page 2 - ZR-1 Net Registry Forums

jonszr1 · 03-11-2007

thought I would share what i modified on the flowmaster system that did 2 things 15 more rwhp and made it sneeky quiet at the same time. I was looking through jegs' and came upon this ultra flow muffler that had duel in and outs . i got a 3in one and replaced the resonator with it . went 3in off the headers to the x pipe muffler then just used the exisisting flowmaster system from there. it is as quiet as the stk system when cruizing and just loud enough when you get on it . Its about 40% quieter than the original flowmaster . Now i can plant my foot without worring about everyone hearing (cops) and she is faster too. one guy says its sneeky fast. that this car tooo quiet to be that quick. that of course after I dusted his 04 z06

Peaven · 03-11-2007

Quote:

Originally Posted by jonszr1

thought I would share what i modified on the flowmaster system that did 2 things 15 more rwhp and made it sneeky quiet at the same time. I was looking through jegs' and came upon this ultra flow muffler that had duel in and outs . i got a 3in one and replaced the resonator with it . went 3in off the headers to the x pipe muffler then just used the exisisting flowmaster system from there. it is as quiet as the stk system when cruizing and just loud enough when you get on it . Its about 40% quieter than the original flowmaster . Now i can plant my foot without worring about everyone hearing (cops) and she is faster too. one guy says its sneeky fast. that this car tooo quiet to be that quick. that of course after I dusted his 04 z06

That's a very interesting combination...I like to hear my Z roar, but I also like it not to drown everything out when it's loafing....and of course I want maximum power (that is the point, eh?) Might have to look at this combo, thanks for the info.

jonszr1 · 03-11-2007

Peav, the cool thing was the 15 bonus ponies. this darn thing is @ 425rwhp. but now I want to port the heads, but need to save soe cash for that .Anyone want to loan an ole guy some cash

Peaven · 03-11-2007

425hp at the rollers, that's smokin'...with that kind of power, I wonder what kind of gains you'd get doing the heads at this point....seems like they might be minimal for the cost factor involved, but you won't know 'til tou do it. I'd be pretty happy with 425rwp even if I had the full porting package, anything over that is icing.

Hammer · 03-11-2007

That would be exactly what Marc and Hib's gains combined would be. Marc says 10 on his website (chip) and Hib had 12 on the Dyno (Corvette Action Center article).

jonszr1 · 03-11-2007

here is what we did coreys' dyno 409.9 .i got this new exhaust mocked up @ 8am dyno stk flowmaster but a friends dyno in bakersfield ca 408.2 put the car on the rack changed things over @11 am modded flowmaster ex which now consists of 3in exto the ultra flow 3in x pipe muffler then the stk 21/2 in flowmaster from there. the changes 3in off header instead of 21/2 and the ultra flowx pipe muffler instead of the flowmaster resonator . final dyno run 425.4. so she improved about 15 hp. it would be fun to try to port the heads but in reality I cant afford the 6k to have that done. what i want to do now is get another set of 90 rears so I canput some drag radials on and go to the strip. If anyone knows some one willing to part with some 90 rear wheels have them pm me. thanx

03-11-2007	#11
jonszr1 Join Date: Sep 2006 Location: lone pine and mammoth lakes Posts: 1,407	Re: Flowmaster Cat Back and a Haibeck chip thought I would share what i modified on the flowmaster system that did 2 things 15 more rwhp and made it sneeky quiet at the same time. I was looking through jegs' and came upon this ultra flow muffler that had duel in and outs . i got a 3in one and replaced the resonator with it . went 3in off the headers to the x pipe muffler then just used the exisisting flowmaster system from there. it is as quiet as the stk system when cruizing and just loud enough when you get on it . Its about 40% quieter than the original flowmaster . Now i can plant my foot without worring about everyone hearing (cops) and she is faster too. one guy says its sneeky fast. that this car tooo quiet to be that quick. that of course after I dusted his 04 z06

03-11-2007	#13
jonszr1 Join Date: Sep 2006 Location: lone pine and mammoth lakes Posts: 1,407	Re: Flowmaster Cat Back and a Haibeck chip Peav, the cool thing was the 15 bonus ponies. this darn thing is @ 425rwhp. but now I want to port the heads, but need to save soe cash for that .Anyone want to loan an ole guy some cash

03-11-2007	#14
Peaven Join Date: Jul 2006 Location: Omaha, NE Posts: 322	Re: Flowmaster Cat Back and a Haibeck chip 425hp at the rollers, that's smokin'...with that kind of power, I wonder what kind of gains you'd get doing the heads at this point....seems like they might be minimal for the cost factor involved, but you won't know 'til tou do it. I'd be pretty happy with 425rwp even if I had the full porting package, anything over that is icing. __________________ SteveB '94 ABZ Lucky #13-SOLD

03-11-2007	#15
Hammer Join Date: Apr 2006 Location: Ideho Posts: 2,653	Re: Flowmaster Cat Back and a Haibeck chip That would be exactly what Marc and Hib's gains combined would be. Marc says 10 on his website (chip) and Hib had 12 on the Dyno (Corvette Action Center article). __________________ [I][FONT=Comic Sans MS]John Boyd[/FONT][/I] [I][FONT=Comic Sans MS][SIZE=1]Ideho[/SIZE][/FONT][/I] [FONT=Comic Sans MS][SIZE=1][I]2015 ZL1 [/I][I]Camaro #1121 BLACK/BLACK 6 SPD (540 RWHP)[/I][/SIZE][/FONT] [I][FONT=Comic Sans MS][SIZE=1]1991 ZR-1 #458 [COLOR=red]RED/[/COLOR][COLOR=black]BLACK 72[/COLOR]k miles ([B][COLOR=red]SOLD[/COLOR][/B]) 1991 ZR-1 #473 [COLOR=red]RED/[/COLOR][COLOR=black]BLACK [/COLOR]37k miles ([B][COLOR=red]SOLD[/COLOR][/B])[/SIZE][/FONT][/I] Last edited by Hammer; 03-11-2007 at 01:08 PM.

03-11-2007	#16
jonszr1 Join Date: Sep 2006 Location: lone pine and mammoth lakes Posts: 1,407	Re: Flowmaster Cat Back and a Haibeck chip here is what we did coreys' dyno 409.9 .i got this new exhaust mocked up @ 8am dyno stk flowmaster but a friends dyno in bakersfield ca 408.2 put the car on the rack changed things over @11 am modded flowmaster ex which now consists of 3in exto the ultra flow 3in x pipe muffler then the stk 21/2 in flowmaster from there. the changes 3in off header instead of 21/2 and the ultra flowx pipe muffler instead of the flowmaster resonator . final dyno run 425.4. so she improved about 15 hp. it would be fun to try to port the heads but in reality I cant afford the 6k to have that done. what i want to do now is get another set of 90 rears so I canput some drag radials on and go to the strip. If anyone knows some one willing to part with some 90 rear wheels have them pm me. thanx