Loot
Member
wondering what exhaust pipe size people are running in there 318's and what I should be looking for I only have an upgraded intake currently. Was thinking of doing a 2.5 Id.
yes that was what was used before the X pipe!Wow that looks nice. Is that cross pipe in the middle functional? Similar to an x pipe?
yep, and even a good 2" dual exhaust will work fine on a mildly built small blockI've run 2 1/4"...
*I Think* it was Flow master, but for sure other muffler/exhaust companies had charts that related and engine size, given performance perameters (HP) & there suggest pipe size for use with that power. I haven't seen it in quite a while.A while back, I called flowmaster about exhaust on a Dart, and they said 2.25 exhaust (duals behind headers) would support 450 hp. Just what they said
2.5" Jegs on my Duster/318
And on my 360....
Please explain.Something I knew upfront got confirmed as an eye-opening experience on the dyno tonight.
Stockish 318s with 2.5 dual exhausts leave power on the table.
It had stock castiron manifolds with dual 2-1/4" seperate exhausts into turbo muffler like mufflers and tailpipes.
Now there's a pair of full length Doug's headers, 2.5" dual exhaust, X-pipe, Borla ProXS mufflers and tailpipes. This setup makes 20 (!) ft/lbs less @ mid range and about 8hp less at WOT.
Simply put, just to much of a good thing isn't a good thing.Please explain.
Simply put, just to much of a good thing isn't a good thing.
With the headers into the exhaust pipe into the muffler, the collector becomes to long and it lost the pressure wave tuning. The muffler used is just like extending the exhaust pipe.
A stock/near stock 318 is often best with a 2-1/4 exhaust pipe w/a H or X into a turbo muffler. If you could put the muffler closer to the header that would be preferred since the power level is low with small cam size.
This is what I have personally found.
If you can make it sing better with a 2-1/2, go for it and share!
Meaning a too large exhaust can/could cost more in power than headers or a digitally tuned ignition curve could make up.
The summit cam kit 109.99 to yer door... LOL. Not the 6900/6901, the other cheapy. I think its the old crane fireball????. .454 lift/272 adv. dur.What cam in the teen? sounds good.
Thanks. I wonder if the Summit cams are ground by Crane?The summit cam kit 109.99 to yer door... LOL. Not the 6900/6901, the other cheapy. I think its the old crane fireball????. .454 lift/272 adv. dur.
It was part of the low dollar 318 build.....
I believe so..... or used to be. However, the lifter boxes said Elgin. I cannot complain at all, cam and lifters for 109.99. When I did that project, I had to keep it under 500 bucks, so that's why I picked that cam. That being said, I'm happy with it, especially for the price.Thanks. I wonder if the Summit cams are ground by Crane?