Dump pipe size?

[mugen_ctr]

Hey guys, for those with boosted cars, an street driven, would a 2.25 dump pipe be big enough? considering im only relative chasing 200hp max from my d-banger

Turbo chosen is TD04L, tuning it for 8psi max

Using log Cast manifold, as these are the preferred choice to use to clear Ac/ps, as such with the greddy kit

I have thought of 2.5, but the clearance for ac and ps is always in the back of my mind....

OR will 2.5 be better option?

[Riced_Civic]

2.25 will limit the power alot. i would recommend 2.5 min. even if u want to keep AC and PS the 2.5 should still clear it.

[YeahByuddy]

and try to make all pipe diameters same

[xenonkuraz]

Yes try to make all piping similar diameter and only go bigger towards the rear.

I would recommend 2.5", even 3" if you can fit it. I was running 6psi making 130kwatw with a stock exhaust but 2.5" down pipe, upgraded the rest to 3" and that figure boosted to 140+

[mugen_ctr]

well atm my cat back is of 60mm diameter, so roughly 2.38 inch, so i figured maybe 2.25, but 2.5 is slighty larger, 3mm bigger, but than 2.25 is 3mm smaller... lol

so what do u guys say? bigger or smaller because of the cat back in question

[xenonkuraz]

Upgrading your dump pipe will still net you gains, however best to go the whole way

[mugen_ctr]

Upgrading your dump pipe will still net you gains, however best to go the whole way

you do make a point, seen plenty of 180sx, wrx etc etc with bigger dumps an they do yield better results, but than again they are running like 3 inch cat backs an all hahahaha

Atm im more leaning towards to go for the 2.25 as its easier to fabricate meaning less time, less money hahaha, but ive seen a few dump pipes on ebay which ill most likely mod to fit my current setup, which are 2.5 so atm its im still researching up whats a viable option

cheers lads

[xenonkuraz]

If you're getting a GReddy kit with the log manifold...it should come with the dump pipe too

[mugen_ctr]

If you're getting a GReddy kit with the log manifold...it should come with the dump pipe too

nah piecing my own kit, more of a challenge u could say lol

an plus i have a strong dislike with the greddy dump pipe, its a really crappy design, feels cheap an nasty if u ever seen the dump pipe in person

[EKVTIR-T]

May as well redo the whole setup in 3inch,you wont look back

[mugen_ctr]

May as well redo the whole setup in 3inch,you wont look back

i have thought about that, but money is tight atm, and the car is more so a DD so as much as i wanna go further, at this stage ill just keep it at 60mm cat back system

but yeah, 3 inch system is on the wish list :D

[Riced_Civic]

if its custom made then go 2.5 and u can work around your ac/ps

[mugen_ctr]

if its custom made then go 2.5 and u can work around your ac/ps

yeah cheers... 2.5 is the go

Atm still looking for the cheapest option... either get a premade an get it to custom fitted on OR get a complete custom dp made up... decisions decisions :/

[Riced_Civic]

cheaper would be getting a custom 1 as its prob gonna cost more to fiddle around with a pre made just to hack it up and make it fit.

[lookingforboost]

i have a 3" and it cleared everything.... 2.5 as a min or your will choke the crap out of it up top 2.25 is ok for the rest if you gut the cat and run a 3" dump other wise 3" dump and 2.5 cat back

[xenonkuraz]

damn thats a massive cooler lol

[Lukezen27]

My old 2.5" Dump pipe!!

A/C friendly and cleared everything nicely
http://luke.scruffie.com/car/b16a/down_pipe.JPG
Custom made by Haks @ Performance Exhaust :thumbsup:2.5"

2.5" min IMO