55# Low Imp Injectors vs 60#

[TType85]

I'm adding an Alkycontrol kit to my car when it goes back together. Currently I have a modded ECM with Siemens 55# injectors. They probably have 25K miles on them since they were put in a dozen or so years ago.

With the alky kit I was going to order a TT chip but got to thinking if I should go to the 60# newer injectors too.

Is there any advantage to the 60's over the 55's I currently have?

I know if my ECM goes out it is going to be a pain to get a modified one again. This car is going to be tuned to max boost on 91/alky with the combo below.

 

[turbofrank]

55's = modded ecm 60' s = reg ecm not much difference 60 lbs are easy to find. You said it mod ecm is hard to find.

 

[qws2000]

Type85, I was thinking about changing my 50lb and chip to the TT chip and injectors... Seems like everyone uses TT?

 

[TType85]

Type85, I was thinking about changing my 50lb and chip to the TT chip and injectors... Seems like everyone uses TT?

I could be wrong, but a TA-66 with ported heads probably pushes the 50's a bit so the 60's might be a bit better.

It seems that the TT chips or the Extender chips from Full Throttle are the way to go. Back when I had my 85 (put in a 86 drive train) I used chips made by JayC mostly.

 

[Slow91z]

55's are good injectors, you already own them no reason to make such a small change in injector size...When you need to upgrade because you ran out of injector then make the move to 80's

 

[qws2000]

this may show my lack of knowldge, but everyone tells me I need bigger injectors with the car I have, but how do you know there too small, and what is the size you need

 

[TurboBob]

That is a good question. The basic estimate is .5 lb/hr per horsepower on gasoline.

600 hp = 300 lb/hr total fuel required

6 cylinders at 50 lb/hr each = 300 lb/hr............... but this would be the bare minimum.

Turbo cars tend to need more than this, and you want some margin for error.

With todays modern chips/controls you can run an oversized injector with little problem (within reason), so you can buy injectors today to match the turbo you plan to buy tomorrow.

Bob

 

[87chrisss]

55s are really 57# injectors @ i think 7 or 8% idc they flow 60# am i right or wrong ?? i have them and never had a problem with fuel even @ 30 psi like i just recently found out.. but i also have some meth to cool

http://www.racetronix.biz/itemdesc.asp?ic=FI11402&eq=FI11402-10&Tp=

 

[87chrisss]

http://www.racetronix.biz/itemdesc.asp?ic=FI11402&eq=FI11402-10&Tp=