Are standard 1*2 injectors man enough for my engine?

[16v_paddy]

Doing a search on this subject gives answers that are clear as mud & raises more questions than answers 🙄

Engine spec: High comp pistons, port matched inlets, 182 manifold & Group N cam timing

So when it's time for mapping, are the standard 172 injectors going to be man enough or would I be better off going for 197 injectors instead?

 

[Krarl]

I'd have thought 197 injectors or 225 injectors would be needed at that sort of spec

 

[16v_paddy]

I know the 225 injectors are deffo overkill for this engine
Looking at what @Coops Mk1 is running on his & I don't think mine will be anywhere near that sort of power so I'm not really sure what to use

 

[Ol’ Tarby]

@NorthloopCup

 

[Greeny.]

I have 197’s in mine and that’s just with 421 cams, matched inlets, ktec filter and the standard 182 manifold as fitted by engine dynamics when they mapped it years ago. They opted to do this due to my standard 182 injectors being at 95% duty which they whernt happy with for a track car which of course is almost always at full throttle, or is at least around Snet.

 

[NorthloopCup]

197 injectors will work best. But who told you to run Grp n cam timing with hi comp? I’m not sure how that’s gonna work out tbh.

The idea behind Grp n cam timing is to alter the dynamic compression ratio to get the most out of the standard engine.

 

[R3k1355]

197 cams or catcams is the better choice, then 197 injectors.

 

[Ph1 Tom]

Either 197 injectors

Or some Mégane injectors (not 225) they're Pico style identical to standard ones
IWP098 - 280CC/min

Or the standard ones will do if you can run a higher fuel pressure of 4bar.