Nissan 370Z Forum

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-   Engine & Drivetrain (http://www.the370z.com/engine-drivetrain/)
-   -   Cutting gas tank, doing side exhaust, adding rear diffuser. (http://www.the370z.com/engine-drivetrain/107957-cutting-gas-tank-doing-side-exhaust-adding-rear-diffuser.html)

synolimit 11-28-2015 07:19 PM

I didnt. My former cbe was just straight piped basically so it wasnt much weight. Definitely saved but id guess 15 maybe. I can weight the car again, actually i need to. Since last summer i have my racing seat in, less wires and brackets, new cbe obviously, light weight rear rotors etc. im hoping to drop a good amount.

wheysted32 11-29-2015 03:57 PM

Do you think the exhaust is going to heat your tire more than it would normally?

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synolimit 11-29-2015 04:56 PM

I dont think but anythings possible. With the camber i have though i think ill be alright for the most part.

BGTV8 11-29-2015 06:21 PM

How is progress on floor/diffuser ??

TerribleONE 11-29-2015 07:20 PM

Side exit exhaust FTW

synolimit 11-29-2015 08:31 PM

Quote:

Originally Posted by BGTV8 (Post 3357122)
How is progress on floor/diffuser ??

Soon, I need to rebuild my bank account LOL. Plus the holidays. Need to pick A material and finish stage 4 of my wire gutting. So far I've gutted all of the wires in the trunk, the wire bundle going down the passenger side door, the wire bundle going down the drivers door, and now need to finish the center consul. Then ill head back to moore speed and get a plan going.

synolimit 12-08-2015 08:19 PM

Another look at the cbe underneath

http://i39.photobucket.com/albums/e1...psx8satudk.jpg

synolimit 12-13-2015 10:24 PM

Gas tank update.

So I can't fill up at a gas pump unless I trickle the fuel in and can't use a gas can unless I use a long hose attached to go down inside the filler neck past the 1/8th vent tube. If the hose or pumps to short the fuel spits back out because the vent tube is getting fuel in it. I'm guessing this is happening because the charcoal canister and evap stuff must have also been a vent when filling. Also when I take the gas cap off I hear a lot air being released or getting sucked into the tank! Now I know the gas cap will 100% vent if the pressure builds to high but I'm guessing that's in the 20psi range when I tested with my compressor.

So simple fix...I hope. I need a vent to atmos vent. I found this Boyd roll over check valve. The reason I went with this one was because after I cut and capped the 1/8th vent line (white one), after starting the car and shutting it off with a full tank of gas, 5 minutes later I hear the vent hose blowing gas out of it all of a sudden! After the car was off the fuel pump or something was releasing pressure or something in the tank and out it came. This Boyd check valve has a plastic float in it acting like an anti slosh plug. It also has a metal ball in it to plug the valve in a roll over.

So here's hoping my filling will be real easy now and here's hoping the plastic plug will stop fuel from coming out again like it did today or on the track when turning hard. The check valve will attach to a hose that will attach to the metal vent line. The barb end will get a little screen or filter on it and it'll all be behind the plastic filler neck cover.

https://m.youtube.com/watch?v=RDy_FbQNw70


http://i39.photobucket.com/albums/e1...pswecidcrd.jpg

http://i39.photobucket.com/albums/e1...ps7fe8f6sp.jpg

need4speed255 12-13-2015 10:40 PM

You need the vent line in order to fuel up like you did previously. As you pump the fuel into the tank you are displacing the air inside the tank. That air has to go somewhere and that is why there was a vent line above the level where the end of the fuel nozzle would be. Just hook the line back up to the original location.

synolimit 12-13-2015 11:20 PM

Quote:

Originally Posted by need4speed255 (Post 3367118)
You need the vent line in order to fuel up like you did previously. As you pump the fuel into the tank you are displacing the air inside the tank. That air has to go somewhere and that is why there was a vent line above the level where the end of the fuel nozzle would be. Just hook the line back up to the original location.

Im not sure you followed what i said in the last post.

synolimit 12-23-2015 12:45 AM

Starting flat bottom and rear diffuser

http://i39.photobucket.com/albums/e1...psegu9cgni.jpg

Bshields22 12-23-2015 11:47 AM

Nice job on everything man! Well done

synolimit 12-23-2015 09:27 PM

Thanks!

mischman 10-10-2016 08:19 PM

Quote:

Originally Posted by synolimit (Post 3367113)
Gas tank update.

So I can't fill up at a gas pump unless I trickle the fuel in and can't use a gas can unless I use a long hose attached to go down inside the filler neck past the 1/8th vent tube. If the hose or pumps to short the fuel spits back out because the vent tube is getting fuel in it. I'm guessing this is happening because the charcoal canister and evap stuff must have also been a vent when filling. Also when I take the gas cap off I hear a lot air being released or getting sucked into the tank! Now I know the gas cap will 100% vent if the pressure builds to high but I'm guessing that's in the 20psi range when I tested with my compressor.

Sorry to some what hijack a thread but ive spent hours googling my problem for the 370 and cars in general and this is the only thread that mentions my problem.

I bought the car 2 months ago and it does this, it doesnt want to take gas what so ever. It takes me 10 mins to slowly fill up. When i unscrew the gas cap it has pressure being released.

Today i took the 3 lines that go to the charcoal canister off all at the same time, i was expecting one of them to release pressure but none did. With all 3 lines off i popped the gas cap and it still had pressure.

I would have assumed that the vent line to the gas neck from canister was clogged but given that the actual tank only vents to the canister from the middle hose, im assuming that is clogged given that the tank had pressure in it with the middle hose unplugged.

Thoughts?


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