Lateral-g Forums - WTSC Grand National

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I orignially used a stock f-body clutch master and even after a few days of bleeding, I could not get enough travel for the rxt clutch. I ordered a DSE master adapter and tilton 7/8 master to fix that. Well, the new clutch master is in and fixed the problem. Although after bleeding this one, I wonder how much more air could have been in the stocker. We bench bled this one for a good 30 minutes and just kept getting more and more air. It was ridiculous how long it took to get all the air out. You could see air bubbles pop up on the opaque cap on the tilton to let us know it was still coming out.

Tomorrow I'm going to put the filler plates in the trunk and figure out why the sending unit isn't reading right. Then I'm out stuff to do until I get a trans speedo plug and an alignment. I never thought this day would come.

http://streetntrack.net/uploads/mont...8526_thumb.jpg

http://streetntrack.net/uploads/mont...8539_thumb.jpg

Mike, I noticed your return going through the flex fuel sensor only. I did the same thing on my grand national but ran into problems. I have a 10 feed and 8 return. i noticed while on the dyno the fuel pressure flat lined on the 4psi gatespring then started to fall off at higher rpm's. This showed a restriction on the return side which at first i thought i had a regulator problem. turned out the flex fuel sensor was just bottle necking return fuel. we added a y into the inlet and outlet from the flex fuel sensor and that fixed the issue.

Quote:

Originally Posted by MeanMike (Post 589959)

Fuel system is done. I'm taking a little risk here for an experiment. I had a -10 feed and -8 return before with a big loud fuel pump. I've always built overkill in a fuel system, but that may have been going to far. My last mustang made 600 at the wheels with a single -6 line returnless system. Will a single -8 feed 950 flywheel hp? I'm going to find out. I'm also not dual feeding the fuel rails. Big hp efi cars make 2500 hp feeding 8 x 160lb/hr injectors on a single fuel rail on each side, I'm doing less than that with 6 in basically one rail. I have the y-block and lines to dual feed later if I find issues on the dyno.

The tank is a stock replacement GN tank, with twin 340lph racetronix pumps, -8 feed to a holley 175gph (660lph) 10 micron e85 safe filter, -8 to the passenger rail, a -8 crossover, then my weldon 2040 regulator to a -6 return running through a GM flex fuel sensor. I had intended to do stainless hardline, but without pulling the body off the frame, it just wasn't going to be practical. I would have had 6 feet of hardline max and added more joints to leak. The body wont' come up off the frame at all with the cage in the car.

From back to front.
http://i112.photobucket.com/albums/n...ps605b8b01.jpg
http://i112.photobucket.com/albums/n...ps25e18a32.jpg
http://i112.photobucket.com/albums/n...ps1e557799.jpg
http://i112.photobucket.com/albums/n...ps8b75062d.jpg
Both lines run inside the frame all the way up front and out the stock hole in the crossmember.
http://i112.photobucket.com/albums/n...ps1d6697dd.jpg
http://i112.photobucket.com/albums/n...ps036d4c2f.jpg
http://i112.photobucket.com/albums/n...psc3208900.jpg

Quote:

Originally Posted by Bsinclair (Post 613676)

It should be returning 100% of the fuel when the engine isn't running and I'm having no problems like that. Were you running this same sensor or the older one that has the inlet and out let parallel to each other? I plan to keep my eye on it regardless.

That thing is dipped in awesome

Car looks fantastic Mike. Best looking GN I've ever seen.
Next video hopefully includes some tire smoke....just sayin.

You aren't the first person asking for smoke. I've got plenty of bugs to work out and break in on the trans and clutch, but eventually I will turn it back up.

Anybody that followed this thread from the beginning a year ago would see that I took a running car and basically redid everything but the engine. At this point it's "done" again. If anyone see's me tear it apart or even hears me talk about making changes again they are welcome to slap me. I'm calling this build DONE. It's now in the drive, maintain and enjoy phase of life.

I raised the front up a little and it get's an alignment Saturday morning. Then just cruising and tuning. I took it for a spin in the light drizzling rain to get the front end to settle.
http://streetntrack.net/uploads/mont...9085_thumb.jpg
Then I swapped spots with my Mustang in the garage so I can continue it's build.
http://streetntrack.net/uploads/mont...9086_thumb.jpg