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Correct Fuel |Injector size?
I'm looking at uprating my 550 injectors on my JDM Spec C in prep for bigger turbo. Will be looking at getting 400+bhp. Question is,,,, is there an optimum size to go for and can you go too big? for instance i know that say 650cc would be fine, but would 800cc be ok:wonder:, or do problems arise by going too big?
Cheers Andrew |
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hi mate, i'm aware of those upgrades but does not really answer my question. thanks for the link though.
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why would you want to fit bigger than you need?
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Greed ! It catches up with us all sooner or later....
dunx |
bigger sometimes is better, you can run lower duty cycle then ;) spray pattern probs can occur if you go mad though
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thankyou. So could i get away with 800cc injectors whilst running say,, 430bhp on a 2 litre STI?
and, to answer the above questions, why i would want bigger than needed: as Dunx as said - for future setup purposes, and because i maybe able to get a set of 800's fairly cheap. |
800cc will give you ~80% IDC at 430bhp which is the ideal - depending on your turbo, fuel pump, FPR etc... If you're ever going to go over that bhp then get 900s and be done with it!
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Yeah, a good rule of thumb for 'future proofing' (up to a point) is to get injectors that are c.200cc more than the minimum you actually need (this amount of 'jump' won't cause running probs).
So because 650cc will see you to 400+bhp, then 740/800cc (or even 900's) will be fine. Then that way, you've got all that extra lovely headroom available for X-more mapped bhp (on another turbo, should it be necessary), etc.. |
Or nitrous..... oer !
dunx |
Originally Posted by joz8968
(Post 8912985)
Yeah, a good rule of thumb for 'future proofing' (up to a point) is to get injectors that are c.200cc more than the minimum you actually need (this amount of 'jump' won't cause running probs).
So because 650cc will see you to 400+bhp, then 740/800cc (or even 900's) will be fine. Then that way, you've got all that extra lovely headroom available for X-more mapped bhp (on another turbo, should it be necessary), etc.. Cheers everyone. |
Originally Posted by apac
(Post 8913267)
Well you learn something new every day. Thanks very much:thumb:
Cheers everyone. Fitting bigger injectors should only be done if you are going to defo scale/map them properly... Or otherwise it will run like a bag of crap (if at all!)/invariably won't be safe for the engine/waste fuel, etc... |
agreed
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