AU2XLSV8

The blue au v8 injectors are 24lb??? How do they go for power capability? I'm sure there's a sum to work this out but i have no clue what it is!

EDXR8

To calculate max hp simply multply flow rate of the injector by 2.04. So for 24lb injectors, max hp is 49hp per injector or 392hp for a V8. There are more accurate calculations factoring in duty cycle etc, but this is an easy guide.

AU2XLSV8

beautiful. thanks!

ebxr8240

Imo if you want over 200rwkw bigger injectors should be thought of. 30Lp / 315cc would be better..Idle would still be o/k....

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AU2XLSV8

any idea of cost or brands to go for

M1ke

Don't you mean 2.04 x flow rate of heads in cfm = horsepower at flywheel

Mr Sparkle

Yep true..

I think AP's old XR8 still had the 24lb units though when it was making 220rwkW+?? I could be well wrong though!

30lb injector kit is the same price as the 24lb!! Currently being US$219, so convert, add import duties / taxes, and freight... also see what price the good man John (LunaticSVT) can do for you as he distributes a metric assload of parts now in the States!

http://store.summitracing.com/partde...MS%2DM9593B302

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AU2XLSV8

At what point should i opt to change my MAS/MAF ???(dunno much about) Now or post injector change?

XR8 Lamah

Same time ideally. If you bump up your injector size, you either compensate by "tricking" the computer with a new MAF, or you have to get some computer work (uni-chip, tweecer etc etc).
As Sparkles said, injectors are cheap in the US (better than the $350 EACH I was quoted the other day for 19lbs from Ford). Another good thing, MAFs are cheap too.

Also, its a very good idea to check your A/F ratio after changes such as this. Even though the MAF & Injectors are supposed to be right, they can still be out, and a lean condition is baaaad mmkay !

No prizes for guessing what I'm doing in the next couple of weeks

AU2XLSV8

sweet! Now to ask another possibly stupid question. changing injectors should happen before new manifold or after. I'm planning to get the ute on a dyno real soon to see how her vitals are reading. Is the stock AU maf a good flowing device? What can i hope to get out of the maf change alone?