I posted this to the r3v Facebook and was asked to post it here to preserve it, so here it is!
I've been trying to figure out a surge tank setup for my early model e30. I didn't want something that went in the trunk because I still drive to the track (i.e. I use the trunk) and I didn't want to have to create a firewall between the trunk and cabin.
I saw a post about putting the 034 Motorsports FP34 surge tank in the stock fuel pump location. Wasn't really able to find many pictures though, so I'm adding mine. Note that you must have the early-model smaller gas tank for this to work. It takes advantage of some of the mounting points already on the car.
This can be accomplished with access to home depot and no special tools. 1.5 inch aluminum bar with a bit of a bend put in it. Then I used a dremel to cut two slits in the aluminum and I cut a slit in the lower factory mount point. Clamps go through the slits, and a piece of 1/4in rubber in between the clamp and surge tank to hopefully cut down on vibration and harmonics. Car won't be possible to start for at least another month or two (engine rebuild) so I won't find out for a bit. The surge tank is definitely oriented a bit towards the front of the car (relative to the bottom support point which is the strongest one) so hopefully it all holds up! Fitment is very tight but it does all fit.
The way I connected this:
-In tank fuel pump goes towards rear of car.
-Fuel pump output is towards rear of car and goes up and cover to the hard line along the frame.
-Fuel return line from engine connects towards the front of the car on one of the lower holes.
-Fuel return to gas tank uses the top-most connector on the surge tank to make sure no air gets trapped in top.
I used a reducer to go from the 12mm fuel line coming from the in-tank pump to the 8mm nipple on the surge tank. The reducer is a little above the surge tank.
I bent some of the fuel hard lines a little so that the rubber hoses routed easier.
Fuel filter was relocated to the front of the car using the fuel filter mount that was used on super early model e30's (I think 318's had them). Hopefully it's not a nightmare to change, I think it'll be okay.
I've been trying to figure out a surge tank setup for my early model e30. I didn't want something that went in the trunk because I still drive to the track (i.e. I use the trunk) and I didn't want to have to create a firewall between the trunk and cabin.
I saw a post about putting the 034 Motorsports FP34 surge tank in the stock fuel pump location. Wasn't really able to find many pictures though, so I'm adding mine. Note that you must have the early-model smaller gas tank for this to work. It takes advantage of some of the mounting points already on the car.
This can be accomplished with access to home depot and no special tools. 1.5 inch aluminum bar with a bit of a bend put in it. Then I used a dremel to cut two slits in the aluminum and I cut a slit in the lower factory mount point. Clamps go through the slits, and a piece of 1/4in rubber in between the clamp and surge tank to hopefully cut down on vibration and harmonics. Car won't be possible to start for at least another month or two (engine rebuild) so I won't find out for a bit. The surge tank is definitely oriented a bit towards the front of the car (relative to the bottom support point which is the strongest one) so hopefully it all holds up! Fitment is very tight but it does all fit.
The way I connected this:
-In tank fuel pump goes towards rear of car.
-Fuel pump output is towards rear of car and goes up and cover to the hard line along the frame.
-Fuel return line from engine connects towards the front of the car on one of the lower holes.
-Fuel return to gas tank uses the top-most connector on the surge tank to make sure no air gets trapped in top.
I used a reducer to go from the 12mm fuel line coming from the in-tank pump to the 8mm nipple on the surge tank. The reducer is a little above the surge tank.
I bent some of the fuel hard lines a little so that the rubber hoses routed easier.
Fuel filter was relocated to the front of the car using the fuel filter mount that was used on super early model e30's (I think 318's had them). Hopefully it's not a nightmare to change, I think it'll be okay.
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