whats the best thing to do?

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Blazer >> Modifications >> Performance & Brainstorming >> Headers, Intake, & Exhaust >> whats the best thing to do?

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whats the best thing to do? - 2/2/2007 4:43:05 PM    blazermanxx Posts: 42 Joined: 3/7/2006 Status: offline So i my 1995 4x4 4door blazer needs some more guts but im not too sure what will give me the best results? I have a HUGE engine lift incase that might come in handy, i have thought about "dropping" in a 350 or getting a supercharger but the cost of that stuff is keeping me away. I was wondering if anyone could give me some insight as to what you have done from headers, to exhaust to what ever and tell me how you liked it, where you go it from and things along that line,  oh and if it really did anything to your performance. right now i am running catless cause it broke so i just have the housing still there but no "honeycomb" thanks  _____________________________ ~Greg 1995 Blazer, 4.3L, 4door 4x4, with 255's all around Post #: 1

RE: whats the best thing to do? - 2/2/2007 6:07:06 PM    BLK85   Posts: 900 Joined: 12/20/2006 Status: offline Just doing exhaust wont get you anywhere close to the power of a supercharger or 350.  The horspower gains the exhaust companies arent true most times.  My guess would be you getting maybe 20 whp out of a full exhaust. Looks like JBA is the only company that makes headers for the blazers(that Ive found). Then after that I would do a custome X-pipe style exhaust with no cats and a high flow muffler(bullet style). I have stock exhasut but thats what I would do from just knowing how it works on other viechles. _____________________________ 1999 Blazer 4x4 4 door 1998 Pontiac Firebird Formula-12.36@112mph 2007 Yamaha TTR230 (in reply to blazermanxx) Post #: 2

RE: whats the best thing to do? - 2/2/2007 6:32:42 PM    blazermanxx Posts: 42 Joined: 3/7/2006 Status: offline yeah oh i know i wont get close to the power gains from a 350 or supercharger but i just want SOMETHING to get more guts. i love the car but i also love quickness and such, i just sold my 1990 corvette, oh and the fact that i got beat by a 2003 HONDA passport!!!! have to make it a bit quicker I like the idea of the headers and full exhaust! i hope it will sound quality too? maybe a hypertech programer? _____________________________ ~Greg 1995 Blazer, 4.3L, 4door 4x4, with 255's all around (in reply to BLK85) Post #: 3

RE: whats the best thing to do? - 2/2/2007 10:16:56 PM    nofear17bmx Posts: 614 Joined: 11/21/2006 Status: offline Ok well the biggest restriction of the 4.3 is its headers. If I can remember correctly, people upgraded the stock 2 1/4" headers to 3" headers then went with a larger exhaust to accommodate for the change and an upgraded intake and now you are pulling more HP. _____________________________ 2000 Chevy Blazer 4wd 4dr 4.3L Auto (in reply to blazermanxx) Post #: 4

RE: whats the best thing to do? - 2/2/2007 10:28:39 PM    swartlkk Posts: 14499 Joined: 5/1/2005 From: Waterloo, NY Status: offline If you were to actually measure the pipe size on the y-pipe, I think you'd find that it is somewhere around 1-7/8" from the cast exhaust manifolds down to the 'Y' in the pipe.  The stock exhaust manifolds are the largest restriction followed closely by the stock y-pipe.  And the fact that you are running without the catalyst in your converter box is probably hurting your overall performance.  The catalyst doesn't really impact the flow of exhaust gases as much as so many people believe.  If your cat went bad, why not replace it with one of the aftermarket high flow units.  This would be much more efficient than allowing those hot, fast moving exhaust gases to cool and slow down inside of the large tin can you now have in your exhaust system. *EDIT* Let me also add that I run 1-5/8" primary long tube headers with 3" collectors on my Chevelle.  The collectors immediately neck down to 2-1/4" true duals and I am not coming close to out flowing them even at my 7000rpm redline.  To go larger than 2-1/4" pipe on a 4.3L is only giving the exhaust too much room to expand and slow down.  You want to keep the exhaust moving as fast as possible throughout the entire system.  < Message edited by swartlkk -- 2/2/2007 10:32:43 PM > _____________________________ Kyle- 04 Rainier My Restoration Projects Please Do Not PM for Tech Help (in reply to nofear17bmx) Post #: 5

RE: whats the best thing to do? - 2/3/2007 8:34:43 AM    nofear17bmx Posts: 614 Joined: 11/21/2006 Status: offline My bad guys, I ment to say exaust manifolds but it looks like kyle corrected me in his post. Late night, not all there. Just trying to give him a general idea. _____________________________ 2000 Chevy Blazer 4wd 4dr 4.3L Auto (in reply to swartlkk) Post #: 6

RE: whats the best thing to do? - 2/3/2007 10:48:56 AM    blazinloud Posts: 2425 Joined: 2/8/2006 From: Saskatoon, Canada Status: offline shoulda kept the vette engine _____________________________ (in reply to nofear17bmx) Post #: 7

RE: whats the best thing to do? - 2/3/2007 1:35:01 PM    blazermanxx Posts: 42 Joined: 3/7/2006 Status: offline So it sounds like a full exhaust with headers is the way to go, ill start looking for that soon. JBA makes the headers, is there a nice company that will make an exhaust or will i have to fabricate my own exhaust? and what about a chip? and a cold air intake? I shoulda kept the vette engine? i should have kept the entire car. haha, its alright i love my blazer _____________________________ ~Greg 1995 Blazer, 4.3L, 4door 4x4, with 255's all around (in reply to blazinloud) Post #: 8

RE: whats the best thing to do? - 2/3/2007 11:53:35 PM    HCCAFan   Posts: 146 Joined: 12/27/2005 Status: offline Our stock airbox is pretty much as good as it gets. That said I have the Airaid intake and it's not much more than a noise maker. (in reply to blazermanxx) Post #: 9

RE: whats the best thing to do? - 2/14/2007 11:51:23 AM    blazinblack   Posts: 58 Joined: 2/14/2007 From: minnesota Status: offline about the air intake they make a difference you will get better throttle response and gas and maybe alittle hp every motor does different with them (in reply to HCCAFan) Post #: 10

RE: whats the best thing to do? - 2/14/2007 1:07:50 PM    speeddemon560 Posts: 496 Joined: 1/4/2007 Status: offline I have a $35 air intake I bought off eBay.  It sounds nice and I seem to get a little better throttle response.  It will give you a horsepower or two....  I K&N FIPK would be the bet, the one with the heatshield.  It's expensive though... _____________________________ 2000 Blazer gettin' pimped http://s168.photobucket.com/albums/u167/speeddemon560 My dash with Nu Image Platinum stuff. (in reply to blazinblack) Post #: 11

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