Injector Size For Mi/gti Hybrid

[markw 1]

As above, I am building an Mi/gti/gti6 hybrid engine for my mod prod sprint and hillclimb car, build spec as follows

 

Mi alloy block

1.9 8 valve crank

mi rods and liners

omega forged pistons 83.5mm

billet steel flywheel

helix 71/4" cast alloy clutch

catcams 4903271

alloy verinears

solid followers

double valve springs

jenvey 45mm dcoe throttle bodies

emerald management

cam spec=

INTAKE- EXHAUST

clearance [cl] 0.25mm 0.25mm

duration [0.1mm+cl] 285° 277°

duration [1.0mm+cl] 252° 244°

valve lift [cl=0] 13.25mm 12.75mm

cam lift - -

peak angle 106° 106° followers:

timing [1.0mm+cl] 20/52° 48/16°

lift at TDC [cl=0] 3.90mm 3.35mm

 

and basically need to source the injectors to suit, i just dont know what size

we are aiming for 220-230bhp

thanks

[opticaltrigger 52]

Hi Markw,

I'm on one with this stuff myself at the moment for our project car.

Follow the link I've attached and you will find a calculator which requires you to input a few bits of info and will return the injector size that you want.

As a note, I would stick with the 80% value on the duty cycle parameter.

 

All the best

O.T

 

http://www.witchhunter.com/injectorcalc1.php4

Edited April 7, 2010 by opticaltrigger

[DrSarty 90 1 Cars]

I'd be tempted to use 8v rods. You'll see why if you read some of the recent threads discussing oil surge; I think one was started by Jrod.

 

I will be doing this on all future XU9J4 builds.

[brumster 135 1 Cars]

I fitted Bosch 305cc 'red' injectors brand new when I built my mi16, they gave me a little room for expansion and have served me very well - originally to about 190bhp spec in the 1.9; now running to 250bhp in an S16. Didn't bother faffing around with recon'd ones - just bought brand new from Aus (www.injectorsonlines.com); cannot recommend highly enough. 70 aussie dollars each - about £42

[markw 1]

Brumster,

 

PMd

[haro09 2]

hi, look here (in france)

http://www.puissance-injection.fr/injecteurs-gros-debit.html

[Dj_mini 7]

Think i was using audi 1.8t injectors on my old mi (230bhp) sandy said these would be spot on so you may want to look at these.

[Tom Fenton 1,542]

There are loads of modern injectors suitable for the kind of power you will be aiming at, all available for buttons second hand.

 

Some mentioned above, plus Rover Tomcat turbo, Saab turbo, Audi turbo, basically anything that makes between 200-250bhp will most likely do the job nicely.

[sideways danny 0]

I'm using Audi 1.8t injectors, Think they're 360cc roughly (did find out when i sourced them) Used Volvo t4 injectors in the past too, basically the same thing. good for 270bhp safely.

[opticaltrigger 52]

Hi Sidways,

Been doing some sums and I reckon your motor will reliably cough up about 220hp using a set of 360cc injectors.Its only a rough calculation using the info at the begining on your engine.

 

All the best

O.T.