power difference...4-1 header vs 4-2-1 header
as title states i want to know what the power difference of a 4-1 header on my gsr as opposed to a 4-2-1 header. ive heard 4-1 headers are better for vtec engines b/c of the better flow, but i hate scraping all around town.. so if its not that much of a power difference, i might switch over to 4-2-1 headers. my bolt-ons realted to this are, my skunk2 2nd gen IM, CAI, and greddy evo2 exhaust w/ str8 pipe.
all input welcome!thanks in advance
Originally Posted by ls-r teg
damn, i want that penis
supposedly 421 is more oriented towards midrange torque and the 41 are oriented towards topend
exactly what i was about to say! This man speaks the truth!
'82 TE72 SR5 Sport Coupe
3tc
^^^what he said...
plus 4-1 you dont have to worry about a flange leaking
41 you gotta worry about scrapeage,i prefer the 421 easier to take off if you have a DA or EF/
4-1 is better on highways compared to 4-2-1 is better for street runs
o realy? soo if i were the type of person that does street runs, 4-2-1 is the way to go?
definetly hate the scrapeage part!!
damn, i want that penis
makes no sense.
if your on the highway at 7k rpm and on the street at 7k rpm, whats the difference?
i like my 4-1 helped give me good numbers on my b20.
Canon Nutswinger:
Canon XS
18-55mm
55-250mm
50mm USM
^^^
wow.
Aye man keep your 4-1 IMO
^^i agree. or get a vteckidd narrow header. i have plenty of clearance with it and it makes a huge difference.
When you guys say "Big" difference, did you actually dyno your car before the header and after? or are you guys just guesstimating.
:idb:
makes a big difference on a Butt dyno! every pull is a different result because you can never sit in the same, exact spot lololol
when Mike tested the h22 drag header on my car we did a before and after...+14whp...no guestimating, his shit makes power
'82 TE72 SR5 Sport Coupe
3tc
I don't think going from stock manifold to header on a GSR is a BIG difference, Whats it like 6hp or so... I would think the diff. from 4-2-1 to 4-1 could only be a couple hp anyways... If you have one or the other it def. wouldn't be worth the time or money to swap... I have always had 4-2-1s on my cars but have installed many a 4-1...
http://www.fastlineperformance.com/skidplate.htm
i could fasten this down on my header with some exhaust clamps couldnt i? or would it be better welded?
damn, i want that penis
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