RENR

also you should only use one check valve.

robs99si

I'm using 2. First day using them, I was gonna use three.
Is one check valve enough? Seems to work good with 2. I've ran the car hard several times today and no problems w/detonation, staling nothing. I'm gonna use 1 and see if the CEL goes on if not then 1 check valve it is.

RENR

i ran 16+ psi with no cel using just one check valve. oh ya but the motor blew just make sure u add fuel!

slamed90civic

yeah so where exactly would i put check valves? Sorry for the dumb question.Its on a d16a6. Thanks oh and i looked in the FAQs but didnt see anything

RENR

ya because its not recommended thing to do. just hook it up on the vaccum line that goes to the map sensor. dont do it if your new to turbos, yourmotor will blow. i blew up a d15 at 16lbs because the wastegate got stuck shut and i didnt get a cel. just becareful and watch your a/f

davcivic

If you are using the hack. It is not recommended, like it was said before, the afc needs to see the boost. If you use an FMU you need check valves, but I guess that wasn't the question. I wanted to clarify, just in case there is a newb reading this and not fully understanding.

RENR

ya thats y i only recommend one check valve. instead of the afc seeing 10psi it will only see about 7. so it will put out less fuel but it will still see boost.

slamed90civic

i understand that i shouldnt do it with the hack but i dont care i have a good understanding on the turbo concept and i have a wideband o2 to tune it and im using a apexi s-afc

davcivic

Great, if you know what you are doing, do it. Let us know what happens. Might be a decent idea for track or race nights, just to boost a little more. It would be great if I had all the tuning tools, i'd do it.

robs99si

I installed the 2 check valve between the Fuel pressure regulator and the BOV vacume line. Is this the map sensor air thinga majig you're talking about?