how bad would this be?

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Jul 30, 2010 | 08:23 PM

#16

danger-ranger93

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well, mine has 2" with a 1/4" of rust, clay and other unknown road debris...lol
but i think when i have the extra cash im doing 2.5 all the way back and putting either an X-pipe in or cherry bombs...if you want straight loud.. i know a guy that has a 5.0 in his 89 and he has mustang shorties, 2.5"pipe and cherry bombs, and its ran as true duals. his is loud as mess.
but mine has shorties, 2"pipe, and some unknown brand turbo mufflers and it isnt too loud but it has a nice deep sound, but it is NOT loud, and if i didnt want it loud i would keep it how it is but im still 16 and my idea about exaust is" if it aint loud, it aint worth having"
just my .02 cents

Jul 30, 2010 | 08:27 PM

#17

86F150302

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Joined: Dec 2007

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From: Jacksonville FL

Quote:

Originally Posted by LCAM-01XA

Nah, they won't, nothing will - the idea behind keeping the pipes smaller is to keep the velocity of the exhaust gases higher which aids in the scavenging effect, large pipes are good only if you have the flowrate to match them which ain't gonna happen with a 302 unless it revvs to the moon - a 429 or a 460 on the other hand, that could be very happy with 3" duals, so if the plans are in motion for one of those down the road then by all means go for the big pipes now. FWIW 2-1/2" duals is what I rab on my old 350 SBC and it worked good, but then again I only got her up to 5k rpm and only on rare occasions since she never lacked power down low either...

I was being sarcastic about the blowmasters lol

Jul 30, 2010 | 09:05 PM

#18

LCAM-01XA

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Quote:

Originally Posted by 86F150302

I was being sarcastic about the blowmasters lol

Figured as much, but he obviously didn't, and it was just easier to just quote your post than type again.

Jul 30, 2010 | 10:27 PM

#19

leavy20

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i have a poor mans exhaust. i have stock manifolds down pipes to my dual in dual out cat(hollowed) then to dual pipes lastly ending out the glasspacks. it sounds alright, but gets almost ear splitting at high RPM's. pipes are 2.25" and i have lost some low end (unfortunately)

after i upgrade the rest of the truck, im thinking an Off-road cam and long tube headers 2.25" pipes into a cross then glass packs 3" behind the Packs exiting behind both rear wheels maybe some resonated tips(how my trucks exhaust was before i hacked it up)

Jul 30, 2010 | 11:14 PM

#20

LCAM-01XA

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Ideally you wanna step the exhaust pipe size down, not up, as you move away from the engine - start with long-tubes with 3" collectors at the end (I think that's the most popular setup), then run 2-1/2" midpipes to the mufflers, then from there back or out the sides you use 2-1/4" tails. 3" tips are okay, but dual 3" tails are too much. Or, for a single exhaust: again the long-tubes and the 2-1/2" mids, but then one of those fancy Flowmaster Y-collectors and then 3" into a muffler and you can go 3" out the back too. Stepping down pipes like that compensates for the exhaust gases cooling down and shrinking in volume as they travel down the system, thus allowing them to keep the good velocity all the way till they exit, instead of slowing down big time after the mufflers.

Jul 31, 2010 | 02:25 AM

#21

Hitokori

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:P im going with 2.5"

Jul 31, 2010 | 05:37 AM

#22

lew52

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Quote:

Originally Posted by LCAM-01XA

I have never heard anyone recomend going to smaller pipes at the end of the exhaust system , its ussally the other way around , the gases are going to cool naturaily & loose velocity , at that point going to a smaller pipe the exhaust gases are going to start to stack up , thats what you don't want ??, all the hiperformance exhaust system i have seen allways are the same size all the way back or get bigger at the mufflers & tail pipes....Lew