qu1cks1lver56 Posted May 1, 2008 Report Share Posted May 1, 2008 well.. i have stock cat and flowmaster 40 exhaust.. can i still do that soapstone thing ? just watch where it stops burning ? you can still do it, i was just saying thats how we did it on the race cars. but yea put your muffler closest you can to the motor, and then off of that do the soapstone trick for the optimum pipe length for your motor, and remember every motor is different, so someone else might need longer pipe or shorter pipe and have the same exact motor Quote First Gen Xterra: Always changing DNX 690HD RF 360.3RF T3002RF T4004RF T10001bdSilver Flute 6.5"s Tang Band 1" TweetersSundown X18 in 7cubes net tuned to 32hz Trust me .25 Blows your Load. Link to comment Share on other sites More sharing options...
Bills Posted May 1, 2008 Report Share Posted May 1, 2008 Backpressure helps the engine make more power, tourqe and horsepower increase with backpressure. When you loose or take off you muffler and run a straight pipe with no sort of device to make back pressure you loose power and gas mileage! It was the stupidest move ive ever made putting a glasspack on my Jeep. Lost 4 miles to the gallon driveing the exact same way! Thats wierd, i put a glasspack on my blazer(4.3L Vortec) and i'm getting about 3 mpg better. this is before and after i added my pipe to the back and put my 3.5 tip on. idk. i had it straight piped right behind the caddy and i gained 2 mpg of my original 11 or 12 per tank off the stock muffler. i do have a air intake chip and cold air intake. but i never saw an increase untill i messed with my exaughst. so i don't know. Bills Quote KwB Team DC Audio Midwest captain Link to comment Share on other sites More sharing options...
Coolwazabi Posted May 1, 2008 Author Report Share Posted May 1, 2008 well.. what i heard was you need the sweet spot.. too much back pressure would be a little harder on the engine and would decrease power and fuel mileage... and too little would do that same.. ? i guess its different for every engine Quote Link to comment Share on other sites More sharing options...
talentfinder36 Posted May 3, 2008 Report Share Posted May 3, 2008 well..what i heard was you need the sweet spot.. too much back pressure would be a little harder on the engine and would decrease power and fuel mileage... and too little would do that same.. ? i guess its different for every engine Thats right. The concept is the same for every naturally aspirated engine but the amounts will vary. Quote Mark 99 Eclipse Spyder Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.