Originally Posted by
sxysweed
I've been doing a fair amount of research, on forums with quite a few top racers/builders that like the single cam Honda's, particularly the d-series. (Don/SOHCinWA, Rushi, Big Tuna, occasionally Bisi, Luke/Live for Physics, DocHudson, Acid Beave, etc). A few of the previously mentioned people have said that ~40" long runners with a GOOD 4-1 collector (with good choke, a good taper back up to ~2.5", etc) will make good power through the entire rshared_pm range.
Good thread:
exhaust setup - onecamonly.com
That's the forum/link I was referring to previously.
That'll pretty much tell you what you want to know... or at least as much as you can without years of practical knowledge.
Originally Posted by
sxysweed
From my build plans (PM me if you want to see all of it), I had the fallowing laid out for the header design. No idea on shape/design of the actual pipes, but this is just rough notes from my research. Not sure on a few numbers and I won't be until the engine is assembled.
D16 Stroked to 1.7L, 12:1+ comp, tuned on 93 oct, shooting for 170whp+
CAI, Edelbrock Performer X IM, Custom Header, 2.5" exhaust
D16Y8 VTEC Head (Good quench, Swirl Ports. Good low-mid range, porting will improve high end)
Bisimoto L3 Cam (2000-8000rshared_pm power range), Springs/Retainers/Cam Gear
Packaging has alot to do with header design/I'll be running the header/exhaust under the engine/car, through a high flow cat, a muffler or two, and dump out of the rear bumper. So the above idea wouldn't work. And I've read that good exhuast scavenging really helps pull the last bit of power out, and working with a small displacement engine, I really need that last bit of power.
sounds like you're on the right path to "figuring it out"