I have a civic EG with a B18C6 engine
I mounted camshaft JUN Type 3 with Piston PCT "B16B"
but i have a problem when the VTEC engage
i like to know your opinion about my problem
injector too small ? cams ? ...


Dyno



ps: Sorry for my English

 

What is the problem with it?

Did you check piston to valve clearence?

 

I think the problem is a huge drop in power.

 

yes

the block is Bored ( 81.25 ) and cheked

 

could that be a fuel lack?
wouldn't a APEXI Vafc 2 with Injector 310cc that go?

 

theres no fuel for the upgraded cams, it needs more fuel. you need to tune your ecu. you could go with a vafc.
is your motor stock? to use the full potential of the cams, you would need other upgrades. ie: bigger TB, header, valvetrain, etc.
is that your air/fuel ratio there at the bottom?

 

Ton VTEC engage trop tot.Avec ton set-up le VTEC devrait s'engager au alentour de 6500rpm. Si il engage trop bas ton moteur ne pompe pas asser d'air pour le gros lobe de tes cams, donc tu perd des hp et sa remonte ensuite.Ton max hp devrait etre vers 8300/8500 avec des JUN 3(je roule des JUN 3 depuis 3ans)

 

french?
No comprende senior,habla ingles?

 

Your VTEC engages too tot.Avec your set-up the VTEC should engage in the surrounding of 6500rpm. If it engages your engine too low does not pump asser air for the large lobe of your camwoods, therefore you HP lose and its ensuite.Ton max HP goes up should be towards 8300/8500 with JUN 3(je rolls of the JUN 3 since áns)

lol

Basically the Jun III's need pretty high VTEC engagement and it's probably too low.

 

That graph is pretty difficult to decipher, but it looks like you might have a major fuel problem at the point where the big cams come on. What sort of provisions do you have for tuning, and how much tuning was done? As others have said, you'll also most likely want to move the VTEC engagement point up quite a bit (though it's not easy to tell where it's currently set with that graph).

 

je suis Belge
je comprends tres bien ce que tu dit

desoler pour le temp de reponse mais ici il est 10h30 AM

ps: tu parle tres bien francais

merci





Modified by squale at 10:29 AM 10/11/2004

 

I have H/I/E
Ecu P30 ( Rev 9000 )
Spring & Retnaire JUN
Head Polished

I have a throttle body EG6 (60mm)
Injector STOCK 240cc
Fuel Rail STOCK
FRP STOCK

 

Up

 

tune it, your injectors are way small.
your running a stock ecu? OUCh can you say boom
you really need to tune for that very high 12's compression