427cc/min/3bar injectors too big on a N/A 200hp engine?

[-Alex77-]

After trying to hassle with standard size injectors, i have decided to buy pico injenctors because there is no too much space.


My engine is N/A 2276cc about 200hp, and 330cc/min/3bar pico injectors should be just good, but at the future i might need bigger injectors, like 400-450cc/min/3bar. There is also 427cc and 490cc/min/3bar pico injectors, are the these too big to run on a N/A 200hp engine?


Obvious reason to get bigger injectors if someday i will add boost

[MinamiKotaro]

I ran 504cc injectors on a 1915 that had maybe 90HP when not on boost.

[Typ 11 Beetle]

I use 470CC injectors an a N/A 2,4 l with no problems.

[Turbo_Manx_Maniac]

500cc here.

[panel]

500cc here.

I thought you were turboed?

[MarioVelotta]

500cc here.

I thought you were turboed?

I'm thinking that this has to do with idle PW and being to big to idle good with the larger injectors, Am I wrong?

[Turbo_Manx_Maniac]

500cc here.

I thought you were turboed?

I'm thinking that this has to do with idle PW and being to big to idle good with the larger injectors, Am I wrong?

Right, I was thinking he was concerned about idle quality with the larger injectors, and I run 50lb injectors. Good idle quality and plenty of headroom when on boost.

[fastback]

i'm positive that this will work just fine.

[-Alex77-]

Yes, i thougt so that 427cc/min/3bar injectors might work.

With this setup it looks like this, there is definetly not too much space. Anyone have/had similar problems? How have you solved these problems?

I might also make slimmer fuel rails, these at the moment are same size as CB rails, just different threads on ends.

[panel]

Can you flip it or the TB around and go inboard?

[-Alex77-]

Only if i can find intake manifolds with reverse mounting possibilites for IDF style bodies, that are straight and have enough material for match porting. I have thought this few times already, so far i havent found manifolds. Also one possibility is to weld injector bungs to bottom of the manifolds, like some have done already.


But with that combo on the pictures, i have successfully run idle and low rpm, without hitting any components to sidewalls, but it is very tight.

[Fiatdude]

I really depends on the injectors you have and how they supply/graph out -- -- not all injectors offer linear supply all the way thru their fuel curve

Don't know if you want to try these as they are $195 ea but you can look at the graphs and see how some injectors "stumble" at the bottom

http://www.t1racedevelopment.com/en/for ... =15&id=128

[Piledriver]

Very informative !!!

Slowtwitch dug up some pico injectors, only about an inch long, commonly used on motorcycles and jet skis...
(I picked up a GSXR harness for $10 on ebay for matching connectors to use on mine)

The ones I'm using came off a 160HP 1100cc jet ski (commonly pushed to 220+ in racing trim, same injectors)
I also picked up 8 zero mile injectors for $100 with 8 free 42mm flange mount ITBs only 60mm high.
(Recall leftovers NIB)

[-Alex77-]

Well i am not going to buy 195$ injectors, 60$ pico injectors should work adequately. Already have designed slimmer fuel rail.

[MarioVelotta]

I really would like some ID injectors. I can't decide on 725 or 1000's since my 570's are about tapped.