Hard start, after installing injectors

[kamikazee47]

Alright i decided to swap out my 370cc injector for 555cc injector, after installing the 555cc injectors it was really hard to start my car it took me 5 minutes to start it. I was wondering if this is normal when upgrading your injectors? I also have an SAFC install, didn't touch the settings when i swap over the injectors to the 555cc could that be the problem for the hard start?

[Craving4Boost]

if you dont change the 370ccs settings to new settings, you're flooding your engine. your ECU is still being fooled into running 370cc's. max it out to -50% for LO map and see how it works out.

[S14toRPS13]

I agree. You need to adjust settings now that you've gone to bigger injectors. You're flooding your cylinders with fuel otherwise.

[480sx]

Im kinda suprized it would start at all, thats a lot more fuel.

You probably should look into getting a MSD btm to control timing. A SAFC2 is really only good till like 7-8 pds of boost, anything over that and your gona blow up your engine.

[kamikazee47]

alright changed my lo map to -50% all the way across, notice it is starting up normally now. Not sure how to tune the SAFC since it was tune by someone when the 370cc were in it. So it would help if i get MSD btm to control my timing?

[480sx]

If you wanted to raise your boost levels safely then yes, you would need a MSD box or some other way of implementing a timing retard based on how much boost your engine is seeing.

[kamikazee47]

any local auto store sell it? or do i need to order it online?

[neverlift]

I'm sure is cheaper online, with shipping lol. but call and ask, tell em to get off their *** and look in the book