How To Cure a "Rappy" Exaust?
OK, just finished up some brake mods (3/4 ton master and Booster), put in seat belts, rear view mirror, new electric fuel pump (thanks fishy! Works great!), went a 1/4 turn out on my idle mixture screws (now it idles great in gear at 700rpm, yes it's a tight converter), put in seat covers, and swapped out all locks (whew!).
Went for a test cruise and the exhaust has that crappy rappy sound between 2500-4000 rpm. I'm running a a .040 360 with 216-224 duration cam with 1.6 rockers and a 10.2+ comp ratio. Exhaust is summit headers (I think, it's been a while) Flowtech turbo muffs and full 2 1/2 pipes. Sounds like damn lowered heavy chevy with a small block, glass packs and 1 3/4" pipes. When it's rappin, it's pulling real hard and this is a 4800 lbs truck, dry and without my fat *** in it. May as well call it a 5015 lb truck, lol!
It is my Ramcharger with 3.55 gears and 33" tall tires. The exhaust pipes themselves are 11' long including mufflers but not including all the bends (just measured in a straight line).
Would adding some 12" glass packs at the *** end on each pipe quell the rap or would it just make it worse? Should I have gone 3" since the exhaust is so long? Is just the shitty Flowtech Turbos?
I do plan on doing an entirely different set up in the future, but I just need to get this sucker ready to tow my Duster to my new place without attracting the attention of the local ticket distributors. The rap is so loud that I goosed it on the frontage road and I saw people on the highway turning to look, lol! OK, it's kinda cool sounding, but I still don't need people two-three blocks turning around and thier dog jumping a foot high 'cause I gave it some juice. It as if there are no mufflers and I'm runinng straight pipes.
Thanks in advance! Oh yeah, a crossover is not in the plans for now or the future due to clearance. I need all the clearance I can get to get to my favorite fishing holes with this thing. Right now I can toss a Snap-On rolling stool right under the sucker with no chance of hitting whatsoever. Here's what sounds like in stationary condition:
I've done some tuning since (timing and mixture) and it sounds better now too. You can hear a bit of the rap there, but it's extreme under load.
Please note the awesome job Leanna did powder coating the Alt and brackets too!
OK, just finished up some brake mods (3/4 ton master and Booster), put in seat belts, rear view mirror, new electric fuel pump (thanks fishy! Works great!), went a 1/4 turn out on my idle mixture screws (now it idles great in gear at 700rpm, yes it's a tight converter), put in seat covers, and swapped out all locks (whew!).
Went for a test cruise and the exhaust has that crappy rappy sound between 2500-4000 rpm. I'm running a a .040 360 with 216-224 duration cam with 1.6 rockers and a 10.2+ comp ratio. Exhaust is summit headers (I think, it's been a while) Flowtech turbo muffs and full 2 1/2 pipes. Sounds like damn lowered heavy chevy with a small block, glass packs and 1 3/4" pipes. When it's rappin, it's pulling real hard and this is a 4800 lbs truck, dry and without my fat *** in it. May as well call it a 5015 lb truck, lol!
It is my Ramcharger with 3.55 gears and 33" tall tires. The exhaust pipes themselves are 11' long including mufflers but not including all the bends (just measured in a straight line).
Would adding some 12" glass packs at the *** end on each pipe quell the rap or would it just make it worse? Should I have gone 3" since the exhaust is so long? Is just the shitty Flowtech Turbos?
I do plan on doing an entirely different set up in the future, but I just need to get this sucker ready to tow my Duster to my new place without attracting the attention of the local ticket distributors. The rap is so loud that I goosed it on the frontage road and I saw people on the highway turning to look, lol! OK, it's kinda cool sounding, but I still don't need people two-three blocks turning around and thier dog jumping a foot high 'cause I gave it some juice. It as if there are no mufflers and I'm runinng straight pipes.
Thanks in advance! Oh yeah, a crossover is not in the plans for now or the future due to clearance. I need all the clearance I can get to get to my favorite fishing holes with this thing. Right now I can toss a Snap-On rolling stool right under the sucker with no chance of hitting whatsoever. Here's what sounds like in stationary condition:
I've done some tuning since (timing and mixture) and it sounds better now too. You can hear a bit of the rap there, but it's extreme under load.
Please note the awesome job Leanna did powder coating the Alt and brackets too!