Нашёл ветку где Joe McCarthy говорит что лучший коллектор имеет следующие размеры (сохраню тут):
1 7/8" Primary (48mm)
2 1/8" Secondary (54mm)
2.35" Venturi (60mm)
3" Tertiary (76mm)
The Jack Burns header is stepped from 1 7/8 to 2 to 2 1/8 and has roughly 27" primaries, ( I use the term 'roughly' because the primaries aren't exactly equal in length), 15 degree bends in the collector with a 2 3/8" venturi and Jack's typical megaphone/reversion cone extension. The 1 7/8" primary 4-2-1 made 2 more HP on the top end of the curve and 2 HP less in the midrange
The Burns 1 7/8 to 2 to 2 1/8" 4 into 1 made very nearly identical HP to my 1 7/8 to 2 1/8 to 3" 4-2-1
Correct is 1&4 and 2&3
I have a real Hytech that was sized for a JDM K20A w/ bolt-ons (my old motor).
Diameters:
1.75"->1.875"->2" venturi ->3"
Lengths:
10" ->22 ->14
Also has the anti-reversion pieces.
On the shelf waiting to go on the car is one of Stephan's 4:1 units sized for a 300hp K24 (my new motor).
1.75" -> 1.875"->2.34" venturi ->megaphone w/small reverse cone->3"exit
asp 25" primaries, 5.5" merge, 11"cone
both 1-2 3-4 paired
toda
The sizes are:
1.77" primaries (16.5" long)
1.96" secondaries
2.16" inch collector after the secondaries
2.36" to the exhaust
ps
rdx injector battery offest for hondata
At what fuel pressure ?
I have some figures for them
Fuel Pressure 43.5psi
8v 10v 12v 14v 16v
2.5 1.8 1.41 1.1 1.04
voltage — 25 / 16 / 14 / 12 / 10 / 8 / 0
Offset(ms) — 1.04 / 1.04 /1.1 / 1.41 / 1.8 / 2.5 / 2.5