Thread: custom Tri Y headers

HCR? high compression ratio?

yes thats on built honda engines. 13:1 is the normal CR for built street honda engines in most cases. on a 13:1 84x87.2mm (1.95L) b series honda I've seen the big tubes loose power compared to the regular version.

results might not be exactly the same because of the bore to stroke difference (among other things) in the b series and sr engines. but i would assume the big tube still might be slightly to big for stock bore and stroke ve engines. anything bigger than stock 86x86 and you might start seeing gains from the big tube version. as is the case with 2.1l honda engines.

someone should buy the two and dyno them though!

mercado ser==== Now everyone loves my discovery the Tri y header. And I thought it wasn't giong to work but it does
ok now thread is 4 pages LOL

if the specs of the big tube are too big then ...

whats the specs of this tri Y header hytech replica you have modified?

because im going to have one custom made....

^^^^Honda B Series Tri-y Header Regular Tube
Measurements:
Primaries = 42.3mm to 44.3mm to 47.8mm
4-2 collector = 47.8mm
2-1 collector = 50.8mm
Outlet = 65mm (2.5inch)

What size are those secondaries? The part where the header is 2 tubes? 50.8 seems small? I'd have thought it would be 54mm

What about lengths?

the secondaries are long as hell. i don't have a measurement but they are pretty damn long. probably has to do with the mis-matched cyl pairing.

The asp and triy. Are almost the same the difference is the last two tubes asp are too short for me I guess making them longer would help

im going to have on cutome made today,will try out the bigtube measurments

headers is not done yet...as well as my custome muffler

my 3 inch exhaust pipes are done....i left the pipe open with a flange in it so when i put the muff i can detach it easily, and vice versa..it was mated to the 2.5 oulet of the SSAC



carbon steel with stanless mandrel bent elbows



painted stealth black....

here is the super small secondaries of the SSAC


sooooo LOOOUUUUDDD! you can clearly hear the VVL kick in....

will post some videos, car felt so strong up top

goooood stuff man....