TwinTurbo.NET: Nissan 300ZX forum - Man, you sure do get stuff done fast..
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Subject Man, you sure do get stuff done fast..
     
Posted by KongZTT GT28RS MD on March 08, 2011 at 11:48 PM
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In Reply To AshSPEC Turbo Inlet System > Final Flow Results, Analysis> posted by Ash's Z on March 08, 2011 at 06:30 PM
     
Message Looks very promising Ash..

Have you thought about relocating the filters like I did? And removing the "under-headlight" piping all together?

I know that Massives are well.. MASSIVE.. I just can't remember how much room there was around them on Dee's build. And whether or not you have room around them to mount the filters up that far.. Even possibly mounting the MAF inline further up stream.. since you will be doing a 3" pipe to replace the accordion section anyways.. and save some room under the headlights for just the filters.

As I posted before about me using ice cream pails over my filters on my first trip to the drag strip directly after completing my old GT28R build to make the air be sucked in rather than "Ram-air" so that it wouldn't' hesitate when driving.

I had it both ways.. with the stock "under headlight piping" squeezed to center with filters behind my FMIC (to test and get my car running etc).. then I trashed that idea and ran each INLET pipe to filters/MAFs under the headlights..

THAT is where I began to notice the "bucket suctioning" A LOT.

Its a lot of free'd up piping if the stock stuff is removed.

I know you probably have already thought of this but I figured mention it to you.

I also never had any issues stalling after a "high rev" while not in gear and letting the RPMs drop.. until I deleted all the stock piping and relocated my filters under my headlights..

When I installed my AFC (to run the dual MAFs, this was before Selin was available), the instructions say that vehicles with larger ball-bearing turbo chargers can have stalling issues after high revs because a lean condition becomes apparent due to the low friction nature of BB turbos.
Sucking in too much air after a high rev, which would sometimes stall the motor.

I used "DEC-AIR" settings on the AFC to correct this problem. Which is designed to enrich fuel delivery at set parameters.

However; When I utilized the stock "under headlight" piping.. this problem never showed itself. The only thing that was changed was the removal of this stock piping, and the much more free flow which allowed the turbos to suck "too" much air.

It proved TO ME, how restrictive all the extra piping adds. Since it was the only variable.

This was on STOCK INLETS/Accordion hoses. Although they are both very restrictive, when I removed the extra piping and just ran MAFs and filters under my headlights, it improved the intake flow tremendously.

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