No boost after bigger injector install

[Ryan12387]

Ok I just installed my new 1200cc injectors car starts up and runs fine ran fine before install also boosting to 17psi now after I can drive as long as I'm not boosting but if I push the pedal down it gos to 2psi and flutters running a safc right now just got my cable to tune black box this coming weekend.

 

[92AWDHX40]

You may have a boost leak check the injector seals at the head.

 

[Spooled420a]

SAFC only goes up to if i remember right is 680cc injectors. Car wont run right till you tune it for the larger injectors

 

[Ryan12387]

Thanks I'll do that to tomorrow

Ok I'll be doing that this weekend so that's fine just gonna use it after for fine tuning when I go e85

 

[zedicus]

i ran a MAFT and a SAFC2 and 780cc (bigger then recommended for the SAFC) injectors on my 1g. for the money in that cobbled together hack i could have got some version of link.

 

[GRAVEDIGGER]

Ok I just installed my new 1200cc injectors

running a safc right now.

There's your problem. Injectors are way too big for a safc to control properly.

 

[curt-s]

Why do I have a strange feeling he's knocking like crazy because the SAFC can't compensate, causing the ECU to pull so much timing that it can barely build boost? Do you have a method of verifying this (ie. logging?) just for fun?

All the changes you have to make for injectors that big (not just airflow compensation), a SAFC cannot do. I'm even surprised the thing would idle well enough. That is, if it even does.

SAFC and E85? Is it even possible to tune for that?

Hopefully, whatever that "cable" is, gives you enough control over every parameter you'll need to change.

 

[GRAVEDIGGER]

Why do I have a strange feeling he's knocking like crazy because the SAFC can't compensate, causing the ECU to pull so much timing that it can barely build boost?

Yep, that's exactly what's happening.

 

[Ryan12387]

I'll be tuning black box with sd and ceddy mods this weekend

Logged knock I'm getting bad knock like you guys said between 69 and 78