b18c turbo

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03-Sep-2006, 12:07 AM

#21

BIGA10k

Registered User

Join Date: Feb 2003

Location: Near roads with NO traffic travelling as fast as I can see

Posts: 163

Sorry for my ignorance, but it is possible that the controller for the injectors has an accuracy that is 4 times greater than stock requires and therefore the 1000cc will still work. My understanding and experience has demonstrated that the duty cycle accuracy is not sufficient for idle control with large injectors. There is good reason for buying correctly sized injectors - otherwise why wouldn't all the companies just make 1000cc injectors - it would save a lot of cost and design issues - plus only one part to stock for every car model.

Maybe I'm wrong.

03-Sep-2006, 12:46 AM

#22

markpa2

Senior Member

Join Date: Jul 2006

Location: Durham Region

Posts: 161

Quote:

Originally posted by BIGA10k
1000cc idle like stock. That's like saying I do a good job at work after I smoke crack.

The stock injectors are 240cc. That means there is 4 times the difference of apparent duty cycle, i.e., 4%, 8%, 12%, 16%, etc. That doesn't make for good control of the air/fuel ratio, like 1%, 2%, 3% - especially at startup and in the cold. You have little control at idle with big injectors. It idles or doesn't - maybe at 1000+rpm it idles fine after warming up - or maybe its been a long time since you've been near a new stock Honda or Toyota.

Yes, a 1000cc injector might idle like stock, but I'd put my money on it not idling like stock in 95% of installations.

I should off said, rought start but once the car warms up almost idle like stock.

10-Sep-2006, 04:06 PM

#23

brianmcgaugh

Registered User

Join Date: Sep 2002

Location: Eastcoast

Posts: 340

Quote:

Originally posted by Bryce
880CC injectors? bwhahahahahaa... BHWHAHAHAHAHHA

Nothing wrong with large inj. gives room to grow, he wont have to buy 2 sets of inj if he wants more power
as well if he ran a set of 440cc and maxed them out, what would happen if he boost spikes...boom.
and idling large injectors is all i the tunner, it can be done easily

I think before you plan on boosting you should have a goal in mind 250whp...400whp low boost, hi boost...
you can make 400 on a t3/t4 57 trim, but it will take alot of boost, or you can make 400 with a t3/t67 on a lower amount of boost
your setup will change drasticily depending on what your goals are.
as well if your going for a hi hp setup your gonna have to start thinking about rebuilding the internals.