Injector scaling question??
Mar 23, 2005, 01:21 PM
#1
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Injector scaling question??
I have a tuned 91 octane map on my UTEC, I have the denso 720cc injectors that I want to put in. My question is should I put like 680cc in the scaling part of the UTEC to give me some safety room until I get the car retuned to find out the exact flow amount. Also since my last tune on 91 0ctane I have added the perrin fmic, samco ic hoses, tubular exhaust manifold, arp head studs, and some different colder plugs. Do you think I would be ok getting into boost, etc. until my next retune in about 2 weeks or so?
Mar 23, 2005, 09:40 PM
#5
Here is a nice formula to use to determine what injectors to use.
Take your expected HP then multiply it by .60 then divide by 4 then multiply by 10.2. So (((HP)(.60))/4)(10.2)
Using this method you can also determine that 750cc injectors on our cars would be good for up to approx 490HP.
This is a conservative measurment but pretty accuracte for most applications. Please note this converstion only works for a 4 cyl turbo charged car.
More fun math info:
Using the same math our stock 550cc injectors are good to approx 359 HP.
And now I realize I misread the post but after all this typing Im just gonna submit.
Take your expected HP then multiply it by .60 then divide by 4 then multiply by 10.2. So (((HP)(.60))/4)(10.2)
Using this method you can also determine that 750cc injectors on our cars would be good for up to approx 490HP.
This is a conservative measurment but pretty accuracte for most applications. Please note this converstion only works for a 4 cyl turbo charged car.
More fun math info:
Using the same math our stock 550cc injectors are good to approx 359 HP.
And now I realize I misread the post but after all this typing Im just gonna submit.
Mar 24, 2005, 05:25 PM
#6
You can leave the scaling alone and the car will run friggin rich until you get it tuned.. closed loop will adjust itself for the time being until they tune it so you'll at least be able to drive it.. BUt you can enable scaling for 660/660 so it doesn't run quite as rich until your tuned..
Those injectors are monstrous by the way.. Don't put your plugs in until your at the shop, you'll just foul the crap out of them until its tune right..
Those injectors are monstrous by the way.. Don't put your plugs in until your at the shop, you'll just foul the crap out of them until its tune right..
