How big is your PIPE?

[DOOM]

Right now I'm running KOOKS headers and full 2.5 inch mandrel bent pipe all the way back to Meg's 4 inch tips!

http://i920.photobucket.com/albums/ad47/DOOMIE/0e6870cc.jpg

http://i920.photobucket.com/albums/ad47/DOOMIE/1ae2f6f1.jpg

http://i920.photobucket.com/albums/ad47/DOOMIE/249029f1.jpg

My question is this. At what point is 2.5 inch not enough and 3 inch is required? As far as back pressure and restriction.

When should 3 inch pipe be used as far as RWHP?

[loud2004marquis]

Nice undercarriage!

[bigmerc281]

That's whats she said :lol:

[screamn]

Jake:

The rear tires in your pics still got plenty tread/meat left!!!!

Guess not enough of :burnout:

+1 on the clean undercarriage

[CWright]

Brian Jones told me that you want 1" per 100 RWHP. You are perfect where you are at 505. Brian is the one who did mine and used to work for Grand Muffler here in Atlanta. He also is the one who did Jerry Barnes car.
Hope this helps Bro! :beer:

[blazen71]

1" per 100 RWHP



I 2nd that

[jwibbity]

im sorry but wouldnt 1" pr 100 equal 5" for him since hes at 505???? i feel as though i had to ask???

[sd8683]

im sorry but wouldnt 1" pr 100 equal 5" for him since hes at 505???? i feel as though i had to ask???

Thought the same thing, only thing i could think is that they mean 1" per side? That would equal 5, which would be right at 505 RWHP. Just a guess though

[marauder410]

ive seen people do 2.5 and a couple do 3' what if i did 3' what would be the dif from to two?

[marauder410]

i planned on a big whipple supercharger one day and be bout 650 rwhp goal one day alluminator with forged internals with gt40 heads machined and ported with kooks headers 4.10 tune CAI full 3' exhaust x-pipe high flow cats whipple 3.4 j-mod and be over 600 hp :D thats my wishhh

[CWright]

Thought the same thing, only thing i could think is that they mean 1" per side? That would equal 5, which would be right at 505 RWHP. Just a guess though


You are correct. You add both sides together.

[Blackened300a]

ive seen people do 2.5 and a couple do 3' what if i did 3' what would be the dif from to two?

About .5" :D

Its more preference, engines do need a little bit of back pressure so it would a waste doing 3" on a NA car. It may even rob power then make. I'm running Stainless works LT headers into 3" collectors into a 2.5" custom H pipe into the stock axle overs out of 4" tips.
http://i32.photobucket.com/albums/d12/blackened300a/a8965a5e.jpg
http://i32.photobucket.com/albums/d12/blackened300a/aaf75a87.jpg

[jwibbity]

Thought the same thing, only thing i could think is that they mean 1" per side? That would equal 5, which would be right at 505 RWHP. Just a guess though

yea i guess it must be for total exhaust, 505=5" divided by 2 for driver and passenger side exhaust would give you 2.5" per side. so if thats correct unless you plan on breaking 600RWHP stay with 2.5".........or if your anywhere from 550-599 go with 2.75"????

[CWright]

For what I am going for over the next 12 months, the 3" I just had installed will put me right in line. :D

[DOOM]

For what I am going for over the next 12 months, the 3" I just had installed will put me right in line. :D

That's why I was asking! :D

Might be right there with ya! ;) :P

[CWright]

That's why I was asking! :D

Might be right there with ya! ;) :P


I hear ya and I like it! :beer:

[Comin' in Hot]

Now I see this, I just put the exhaust back in my DBP today and could have taken pics, it has cobra shorties with a full 2.5" mandrel bent exhaust with magna flow mufflers installed my grand muffler in marrietta, ga...... My trilogy has kooks long tubes, 3" mid pipes, flowmaster mufflers into 2.5" tail pipes

[MOTOWN]

Im going with a complete Stainless works 3" exhaust, hope it will be big enuff!:coolman:

[71cyclone]

Once again ,the work Looks FACTORY FRESH [ D. E. ] "Doom Engineered"