maximum injector size?

Holden/Delco Tuning. ALDL, OBD 1.5. Circa 1989 to 2004.
Post Reply
briney
Posts: 132
Joined: Wed Jun 16, 2010 11:40 am
cars: a couple of escorts and some dodge trucks.
Location: western nsw.

maximum injector size?

Post by briney »

Hi guys. i'm doing a bit of research before embarking on a project. can an '808 handle 2200cc injectors? they'd be high impedance bosch deals. for some reason i thought it was limited to 1000cc or so. i had a bit of a search, and found the calculator, but no mention of a maximum size.
Charlescrown
Posts: 1831
Joined: Sat Aug 06, 2011 7:58 am
cars: V8 VR Commodore BT1
LB Lancer 2L turbo & Delco
Starion TBI with Delco
Mitsubishi Lancer EVO4 track car
NA MX5
3 vintage motor bikes
Location: Padstow NSW

Re: maximum injector size?

Post by Charlescrown »

As far as the ECU goes it's the resistance not the flow. The problem may be getting the duration low enough for idle but that's also dependant on the requirement for the engine.
User avatar
antus
Site Admin
Posts: 8237
Joined: Sat Feb 28, 2009 8:34 pm
cars: TX Gemini 2L Twincam
TX Gemini SR20 18psi
Datsun 1200 Ute
Subaru Blitzen '06 EZ30 4th gen, 3.0R Spec B
Contact:

Re: maximum injector size?

Post by antus »

there is no practical limit. the injector flow doesnt affect the electrical requirements. it can make it harder to tune idle because big injectors often struggle to inject consistant small amounts of fuel. because of this its even more important to get opening time vs voltage correct and you can also get some benifit from the single/double fire options below a given ms pulse too.
Have you read the FAQ? For lots of information and links to significant threads see here: http://pcmhacking.net/forums/viewtopic.php?f=7&t=1396
briney
Posts: 132
Joined: Wed Jun 16, 2010 11:40 am
cars: a couple of escorts and some dodge trucks.
Location: western nsw.

Re: maximum injector size?

Post by briney »

thanks for the clearing that up. dunno where i got that idea. it'll be on e85, so that'll help with the low pulsewidth stuff with any luck.
User avatar
The1
Posts: 4694
Joined: Mon Jan 04, 2010 10:23 am

Re: maximum injector size?

Post by The1 »

Seen 2000cc used no worries.
User avatar
Holden202T
Posts: 10311
Joined: Sat Feb 28, 2009 9:05 pm
Location: Tenambit, NSW
Contact:

Re: maximum injector size?

Post by Holden202T »

yep im running 2000cc injectors no problems in mine, the injector rate is getting down (.0204) but theres still room to go larger!

im running methanol, the low pulse width flow is still ok on these too, its not a full mist but its certainly a lot better than the dekas i used to have!
Post Reply