what injectors will i need?

[Gareth]

hey all,

right ive got a golf mk2 1.8 8v gti engine im doind a total rebuild! new every thing bigger pistons the works! we have worked out that she will be about a 2.2 liter when we have finished! any one got any ideas what injectors i should use? and whats the k-jet system all about? cheers

[rubjonny]

what injection system are you running it on, I assume digifant due to your k-jet question?
k-jet is the older mechanical fuel injection system fitted to pre-88 cars.

[Diamond Hell]

With all due respect, I think if you're spending as much as you're looking at, you could do a lot better than nailing K-jet (which is an antiquated injection system) on what sounds a very expensive engine.

[Gareth]

yeah shes costing a little was thinking of using the vr6 injectors but does any one know if the will work ok? or is there a better fuel system i could go for? cheers

[rubjonny]

megasquirt would be the most flexible option, digi and k-jet dont really cope well with mega mods!  good news is that injectors for the digi head are common, so there is no trouble sourcing what you need.  however you need to figure out what flow rate you're after really, I think G60 ones would probably be close to what you want?  Vauxhaul blues offer a nice bump up from the factory MK2 digi flow rate, but again its a case of finding out what flow rate you want, then you can look up what cars have what you need!  Heres a quick list I've made up of common ones I have come across:

Alfa 1.7-3.0, Fiat, Ford 2.0, Nissan - 189.2cc/min, Bosch 0 280 150 702
Volkswagen MK2 digifant = 191.8cc/min, Bosch 0 280 150 757, VW 037 906 031A
Volkswagen MK2 digifant = 197cc/min, Bosch 0 280 150 903
Saab white = 213.9cc/min, Bosch 0 280 150 712
Vauxhall 20XE cream = 214cc/min, Bosch 0 280 150 744
Volkswagen MK2 digifant = 197 or 218.1cc/min?, Bosch 0 280 150 902, VW 037 906 031C
Vauxhall C20XE blue = 241cc/min, Bosch 0 280 150 427
Volkswagen MK2 G60 'Green' = 244.9 or 263.8 or 280?cc/min, 49hp, Bosch 0 280 150 905, VW 037 906 031 D
Ford v6-3.8l SC? = 300.1cc/min, Bosch 0 280 150 945
Vauxhall Calibra Turbo C20LET yellow = 304cc/min, Bosch 0 280 150 420
Audi 2.2 S2 (3B) = 304.8cc/min, Bosch 0 280 150 737
Volkswagen MK2 G60 'Grey' = 307.9cc/min, Bosch 0 280 150 923, VW 037 906 031f
"Red Top" Mustang injectors = 315cc/min
Audi 2.2 S2 & S6 (ABY/AAN) = 345.8cc/min, Bosch 0 280 150 951, VW 034 906 031b
Audi 2.2 RS2 (ADU) = 345.8cc/min, Bosch 0 280 150 984
Saab reds = 359cc/min, Bosch 0 280 150 431
Volkswagen 1.8 20vT = 386cc/min, Bosch 0 280 156 064, (BAM) VW 06a 906 031 bc
Porsche GT2 = 396.8cc/min, Bosch 0 280 150 791
Ford 5.0l V8 = 420.4cc/min, Bosch 0 280 150 558

If you get some injectors you can look them up here:
http://users.erols.com/srweiss/tableifc.htm

[Gareth]

ok cheers mate will have to sit down and work it out

[Gareth]

sorry ive worked my enigne size out rong 

bore size is : 83.50
stroke :92.8
= 2.032 

so now ive worked things out right lol will the g60 injectors give me the power i need of is it best to look for something better?

was looking at Volkswagen MK2 G60 'Grey' = 307.9cc/min, Bosch 0 280 150 923, VW 037 906 031f


cheers

[danny_p]

was going to say, i was trying to work out how the hell was going to pull 2.2 ltr

[rubjonny]

I would say they might be a bit much, G60 is what 160bhp?  cant see you getting close to that on yours, but then again if you go megasquirt you should be able to dial em back to suit I guess.

not that I'm the world authority on either injectors or megasquirt mind 

I would say the vaux cremes would be ok good enough, I had a set o these on my MK2 with 2.0 8v, chip, cam etc on std digifant managment and it went very nicely
I had the std fpr (2bar?) on there you could up it to a 2.5/3bar one which will help up the fuel delivery potential if what you get isn't quite enough.
The main reason I'd steer clear of the G60s is they tend to go for silly money, (ebay RARE) whereas the vaux ones you'll prob be able to pick up cheapy as they pretty widely available.  Theres also the vaux blues which are half way between the vaux creame & g60 ones?