85 Monte Carlo SS build

**firebird_1995** · 06-29-2013, 09:30 PM

That's not off topic. I thought the stock fpr is a 1:1 reference?

***popo8*** · 06-29-2013, 09:54 PM

Originally Posted by firebird_1995

That's not off topic. I thought the stock fpr is a 1:1 reference?

But i dont think it adjusts with boost... Just vac-0
Im a terminology idiot tonight...maybe someone else can explain what im saying. unless u understand me. Lol

Co-Owner/Admin @ LTXtech.com

**firebird_1995** · 06-29-2013, 09:59 PM

Hmm I thought it went both ways. Meaning at zero pressure it had 45psi, at -10psi intake vacuum it had 35psi, and at 10psi intake pressure it would have 55psi.

***popo8*** · 06-29-2013, 10:11 PM

I may be wrong... But i thought there was a reason i upgraded to an adjustable "boost ref" fpr.

I dont claim to know for sure... Just tgrowin out the lil i do know in hopes it helps

Co-Owner/Admin @ LTXtech.com

**JPack** · 06-29-2013, 10:11 PM

To be honest the best knowledge base on dfi is turbobuick.com . They have been using it on boosted cars for years. Lots of good guys there that know their stuff. While I do a lot of na stuff and nitrous, and also run 60# injectors, your best bet is to go right to the guys that run dfi with boost. Thats the crowd that has been there and done that.

**firebird_1995** · 06-29-2013, 10:16 PM

Ya know I never thought about going over there for insight, hell I'm running their tank and pickup. What do you think of my fuel pressure being high like that? What regulator do you run?

**JPack** · 06-29-2013, 10:34 PM

I run an aeromotive ref to my intake. I had a bitch of a time with idle as the cam I run doesn't produce much vac. I am still rich on idle but it is the best it will get.

With my fpr I adjusted to 43 with no vac and set. I honestly don't see you getting away with running the stocker in your application. You will need an adj boost ref unit.

**firebird_1995** · 06-29-2013, 10:38 PM

Ok, sounds good to me. Maybe I'll get lucky and that's the reason for the higher pressure too. Thanks!

***popo8*** · 06-29-2013, 11:14 PM

Originally Posted by JPack

....I honestly don't see you getting away with running the stocker in your application. You will need an adj boost ref unit.

Glad I was on the right track with that... even though I couldnt explain why...

**firebird_1995** · 06-30-2013, 08:29 PM

So I have an aeromotive fpr on the way. I've got a 4 day weekend coming up this weekend so I'm hoping to get it on the road. I want to start on the body soon also. I should hire some kids to strip the old paint off.... that's the part I dread most.