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Duratec R500 suitable injectors
itsawindupuk - 9/4/19 at 10:14 AM

Hi everyone, the engine I’ve built for my MGB GT is basically an R500. Looking at around 250 to 260 bhp. I’ve seen these Bosch injectors for Astra vxr 0280156280. I know green giants work but there seem to be a lot of fakes about and the Vauxhall’s ones are easily obtained at a good price. They are 470cc/m. Would they suit or are they too big and will give poor idle?

Many thanks for any input

theduck - 9/4/19 at 10:27 AM

Being a modern style of injector of that size, they will idle perfectly well and they are more than adequate size wise. I have a used similar spec bosch and even larger denso injectors without issue.

big_wasa - 9/4/19 at 10:49 AM

Cheap oem,
pico sized injectors, Megane 225 around 440cc.
Full size Bosch, Focus Rs mk1 around the same cc. Both can be had for just over £100 for a new set of four.

theduck - 9/4/19 at 12:17 PM

Cheapest I found for 440cc used were subaru “baby blue” injectors. Under £50 a set.

SteveRST - 9/4/19 at 12:40 PM

quote:
Originally posted by itsawindupuk
seen these Bosch injectors for Astra vxr 0280156280...


I've been running these injectors in my zetec turbo for about 6 years. I seem to remember I got a complete brand new fuel rail with 4 injectors and FPR for £100 back then from Vauxhall dealers. Fantastic value.

Idle has been fine for me. I'm running about 250 bhp on the zetec turbo.

big-vee-twin - 9/4/19 at 02:31 PM

I used Giant Whites for a while in mine, now I have 2 injectors per port which are standard Mondeo.

itsawindupuk - 10/4/19 at 12:11 PM

Thanks for the responses everyone. I'll order the vauxhall ones and put up a sneak preview of the engine