Exaust Question
03-05-2005, 05:08 AM
#1
Registered User
Thread Starter
Join Date: Dec 2004
Posts: 6
Likes: 0
Received 0 Likes
on
0 Posts
Exaust Question
I have a 91' 3.0 4 runner with a newly rebuilt engine installed myself. I've opened up the bottom of the intake box to give'r more air, now I'm on to the exaust... I have been given a FLOWMASTER muffler but it's for a Chev truck (3" intake with dual 2 1/2" outlet) wondering if this is going to be too big for the engine, and my have no back pressure?? ( will be installing after the cat converter.) but it will give a nice sound I hope and the look of Duals. Second part looking for suggestions on wher to run the tail pipes out?? #1 (angled to sides behind the rear wheels each side) or #2 (straightout the back about 6" in fro either side of the truck) also thinking of chrome tips for tailpipe the ones about 1' long with the tappered cut. any photo's or suggestions would be Great. beiggest concern is the size of the pipes in the muffler and the effect it may have on Preformance...
03-05-2005, 07:33 AM
#2
Contributing Member
Is this a 4WD? I wouldn't go straight out the back with chrome tips. 
I would rip those off the first trail I hit. Think departure angle and stay clear in the rear. 
I would stay as close to this write-up as possible, it seemed to work good for him.
http://www.4x4wire.com/toyota/tech/downeyheaders/
At the very end of the instructions Scott said:
"I have now had two different exhaust setups with these headers. Based upon my experience I suggest running 2-2.25" pipe off of the headers, and when the two pipes combine to one, then bump up to 2.5" pipe the rest of the way out. This is the largest size exhaust I would recommend running. If you put too large of an exhaust pipe on your engine, it will not have the back pressure it needs, and you will actually LOOSE horse power and torque from your engine."
I would rip those off the first trail I hit. Think departure angle and stay clear in the rear. I would stay as close to this write-up as possible, it seemed to work good for him.
http://www.4x4wire.com/toyota/tech/downeyheaders/
At the very end of the instructions Scott said:
"I have now had two different exhaust setups with these headers. Based upon my experience I suggest running 2-2.25" pipe off of the headers, and when the two pipes combine to one, then bump up to 2.5" pipe the rest of the way out. This is the largest size exhaust I would recommend running. If you put too large of an exhaust pipe on your engine, it will not have the back pressure it needs, and you will actually LOOSE horse power and torque from your engine."
Last edited by mt_goat; 03-05-2005 at 07:36 AM.
03-05-2005, 11:48 AM
#4
Registered User
Thread Starter
Join Date: Dec 2004
Posts: 6
Likes: 0
Received 0 Likes
on
0 Posts
Yeah it's a 4x4 thankx for the info I wuz hoping i could use this muffler cuz it was free..... 
but I really don't want to lose and torque or power will keep looking thankx
but I really don't want to lose and torque or power will keep looking thankx
03-05-2005, 08:06 PM
#5
Registered User
Join Date: Aug 2004
Location: Sammamish, WA
Posts: 1,385
Likes: 0
Received 0 Likes
on
0 Posts
Yah, free is always good, but it's not worth the loss. Seems like the general consensus is the 2.25" is best for most 3.0's, and 2.5" is the biggest you'd want to go.
Thread
Thread Starter
Forum
Replies
Last Post
TJWilly
95.5-2004 Tacomas & 96-2002 4Runners
6
07-31-2015 02:05 PM
