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B18C6 - After all the work, it's not making the power I think it should.
hi guys
have following setup
P&P head 230 cfm
titanium springs supertech etc new rockers everything new and strong
+0,5 intake flat, 0 exhaust
skunk2 pro2 cams (no degrees)
12,3 wiseco pistons 81,5
h-beam rods blueprint 5430
intake polished skunk2 black series throttle skunk2 70+
exhaust 4-2-1 bisimoto 60mm original
76mm full catback no muffler
Vtec 6k
redline 8,5 - than it begins to detonate
result only 222,8 crank
Where is the other 20-30 hp?!!!
Last edited by MaSSimo-DSI; 09-24-2018 at 02:25 AM.
Reason: Go Advanced
re: B18C6 - After all the work, it's not making the power I think it should.
Not supposed to use oversized valves with Pro2's, and you should also get those cams degreed for your setup.
If you're getting detonation in upper RPM that means something is off with the timing.
I'd want to see a picture of the Bisi header, but those are often crap for performance applications. Also what intake are you using, the Skunk2 ITR replica, or the Ultra Street?
re: B18C6 - After all the work, it's not making the power I think it should.
Originally Posted by Chance EG
Not supposed to use oversized valves with Pro2's, and you should also get those cams degreed for your setup.
If you're getting detonation in upper RPM that means something is off with the timing.
I'd want to see a picture of the Bisi header, but those are often crap for performance applications. Also what intake are you using, the Skunk2 ITR replica, or the Ultra Street?
bisi made the header according to my specs years ago
intake skunk2 pro (probably replica I don't remember because I've been building my setup since 2008, almost decade)))
re: B18C6 - After all the work, it's not making the power I think it should.
That's alot of air in there with the cfms in head, tb and the cat back and cams. You're not getting enough fuel at those rpms, what injectors and fuel pressure?
re: B18C6 - After all the work, it's not making the power I think it should.
Originally Posted by qais_vtec
That's alot of air in there with the cfms in head, tb and the cat back and cams. You're not getting enough fuel at those rpms, what injectors and fuel pressure?
You've not listed which ecu you've got in your build spec, don't tell me you've done all that and not tuned it?
What cc/min are rdx injectors and do you mean 3.5-4psi +stock fuel pressure?
Re: B18C6 - After all the work, it's not making the power I think it should.
Originally Posted by MaSSimo-DSI
100% info that with +1mm int valve even with pro3 there is vtv 1,7mm clearance in vtec
simple 100 octane
do u have pro3? ive measured pro 2 cam in vtec with std valves and there was not so much room, but enough for no vtv contact. so what cams do u have? pro2 cam sheet say not to use oversize valves
Re: B18C6 - After all the work, it's not making the power I think it should.
Originally Posted by 1HGEJ2
do u have pro3? ive measured pro 2 cam in vtec with std valves and there was not so much room, but enough for no vtv contact. so what cams do u have? pro2 cam sheet say not to use oversize valves
mine are pro2 with 0,5mm int valves
pro3 are on other build with +1 int and vtec vtv was 1,7mm space.
ecu is hondata s300
fuel is walbro 255
rdx are 410cc
pressure 3,5-4 bar (not psi)
we tunned it 2 hours and no more than 220+ hp
and after 8,5k rpm it begins to detonate.
May be 410cc is not enought, may be 100 octane is low for 12,3-12,5 rate. Or to put higher sparks. Now it is ngk 7
Re: B18C6 - After all the work, it's not making the power I think it should.
Originally Posted by JRCivic1
The duty cycle should be pretty close to maxing out unless the static fuel pressures have been significantly raised.
at 50-58psi it may be enough, but (from personal experience) if you run the RDX injectors close to max they get inconsistent. (85% is the max I'll run with them)
then again the tuner should be able to tell you if you are running out of fuel. (provided they are worth anything)
09-24-2018, 02:20 AM
B18C6 - After all the work, it's not making the power I think it should.
