DIY: Deastchwerks 265c Fuel Pump Install

[killerkid08]

Idk they are all cheap, the o-rings and spacers that is, but the sun isnt even near its highest point in the Twins Aftermarket life, so there isnt a science to it yet.

[Sportsguy83]

Originally Posted by DriftEm

what's part number for the o-ring?

@xjohnx has a part number from Napa for them, he'll chime in.

Originally Posted by pheoxs

I still don't understand this hole stacking orings, it just doesn't make sense to me why it'd be like that.

Great write up though! I'm installing this pump next week and really appreciate the pics

The available FP's are universal, so their height is different than OEM pump, thus the need to play around with O rings to make the pump seal inside the canister and not loose REALLY important fuel pressure and prevent the motor from BOOM.

[xjohnx]

Originally Posted by Sportsguy83

@xjohnx has a part number from Napa for them, he'll chime in.

NAPA part 2-12093 for 2 of them.

[Sportsguy83]

Originally Posted by xjohnx

NAPA part 2-12093 for 2 of them.

Thanks man.


@xxscaxx add these to OP

[xxscaxx]

Originally Posted by Sportsguy83

Thanks man.


@xxscaxx add these to OP

NP, added it under step 11 where it mentions the o-ring installation.

[DriftEm]

It looks like Deatschwerks has revised the bump, as you can see below the output shaft has these teeth like thingy now. The white washer does not fit on this new output shaft anymore. But the kit now comes with 3 of the black O-rings.

[HRTROB]

Thanks to the OP for the DIY! I'm about to install the DW65c fuel pump in my car, and this thread is extremely helpful. However, I have a couple of questions. It looks like DW has revised the pump nipple as posted by DrifEm. They now include 3 o-rings and their instructions tell you to install the three o-rings or alternatively, the white spacer (cut on one side so it will expand and slip into the revised nipple) and one o-ring. Whoch method is better?

The local tuner here who installed the same pump on their 450hp 86 shop car advised me not to cut the spacer and just use a file to enlarge the hole on the white spacer and use one o-ring. What do you guys think?

[xxscaxx]

Yeah, I wouldn't cut the white spacer. Over time it may crack the spacer on the opposite side.

I'd just install the 3 o-rings, or you could file the spacer as well. Its more or less the same thing, just take the 3 o-rings and make sure they are the same height as the white spacer + 1 o ring. I mean any modification you make to that spacer you are losing some of the integrity of it, so I am not sure how comfortable I would feel having to drill that out or cut it.

Why did DW do that?

[Turbowned]

Thanks for the DIY; it helped a lot!

I have the revised pump as well and I cut the spacer personally; it appears to be made of delrin so it should stay solid. I used the white spacer and two o-rings as pictured; though... hope it doesn't cause an issue...

[Tye300]

Just installed mine today. Installed it with four o-rings first per instructions. Car started and idled fine. After a street tune, we parked the car for a few hours, when we tried to start it again it would not fire. We took the pump out and put the spacer on with one o-ring, the car started up again.

[weederr33]

I hate to ask such a stupid question. I'm wanting to get the DW65c fuel pump, so that I won't starve my engine when driving hard. But, during regular DD, would having a larger fuel pump result in a decrease in MPG?

[ajc209]

Originally Posted by weederr33

I hate to ask such a stupid question. I'm wanting to get the DW65c fuel pump, so that I won't starve my engine when driving hard. But, during regular DD, would having a larger fuel pump result in a decrease in MPG?

Hello,

Have you had any issues with fuel staration?

As I understand it, the stock pump is capable of supplying enough fuel to a Cossie stage 2?

[weederr33]

Originally Posted by ajc209

Hello,

Have you had any issues with fuel staration?

As I understand it, the stock pump is capable of supplying enough fuel to a Cossie stage 2?

I have not, but I was considering upgrading it eventually.

[dj2020]

@xxscaxx Thanks for this DIY. It made the fuel pump install fairly straightforward.

I do have a few questions about my install and if I did everything correctly. I ended up installing the Denso 260lph from Chris over at Speed by Design and purchasing a DW adapter kit from Summit Racing. The wiring harness worked perfectly and I used the OEM white collar with 2 o-rings. Everything seemed to be plug in play except for the fuel sock. The DW adapter kit from Summit Racing came with a short yellow sock that had a rigid plastic backbone inside of it that prevented me from bending/fitting it into the fuel canister assembly. However it did allow for the metal barbed ring and rubber black end cap to be used to secure the sock to the end of the fuel pump as per this DIY. On the other hand, the longer, white sock that came with the actual Denso fuel pump allowed me to fit the fuel pump assembly back into the canister assembly because the sock was much more flexible. But this longer, white Denso sock did not allow me to secure it to the new Denso fuel pump with the barbed metal ring and black rubber end cap. It is simply pressure fitted into the hole at the end of the fuel pump. It seems secure because I had to push fairly hard to get it pressure fitted but I'm concerned that it will eventually work itself loose. Also, since we've removed the clipping mechanism that held the OE fuel pump to the fuel pump assembly, how does our aftermarket pumps stay secured in the fuel pump assembly? I just sent Chris an email to ask him his thoughts but I thought I'd pick your collective brains as well. How did everyone else do theirs?