I am thinking of getting the HSR(For Stock L98) and I have a question about injectors....

I know I dont need alot for stock, but I dont wanna change my injectors after some heavy mods.... So will larger injectors hurt me???

Can someone tell me what size injectors are appropriate for certain horsepower applications??

Thanks

 

It is definatly possible to have your injectors too large. This usually causes a problem with idle.

As for sizing the injectors, I found this equation at a DIY-efi web site that claims to be a good starting point. They are claiming that about 85% is where you want to run at WOT.

http://www.megasquirt.info/index.html

"To determine how big should your injectors should be, multiply estimated horsepower (HP) of your engine by the brake specific fuel consumption (BSFC)* and divide by the number of injectors and the desired duty cycle and you will get a rough estimate of injector size:

InjectorSize = (HorsePower * BSFC) / (#Injectors * DutyCycle)

for example, a 135 horsepower gasoline fueled 4 cylinder engine with 2 throttle body injectors and 0.55 brake specific fuel consumption gives:

(135 HP * 0.55 lb/hr/HP) / (2*.85) = ~ 43.7 lb/hr"


I haven't tried this and can only assume this is good information. Hope this helps, and good luck!!!

 

BTW, the injector information on the megasquirt website is found by using the link on the left called "Injectors and Fuel Supply".

http://www.megasquirt.info/index.html

 

My wife's car runs 42lb SVO injectors with no idle problems. Get it tuned and it will be fine. I would suggest going with 30lb SVOs, which will give enough fuel for 450fwhp, cost the same as the 24s, and not run as high of duty cycle as the smaller injectors.

Charlie