Fuel cooler for upgraded ALH

[Votblindub]

Background info: I am going to be shooting for a 235/375 for output on my ALH powered wagon.

1)Question for anyone around that output and high numbers guys, do you use a fuel cooler with your 11mm(or larger) injection pump?

2)Is it necessary? I'd like to build it so that it's a really reliable car to be driven daily.

3)Is the fuel cooler a huge help/does it make a palpable difference or is more of a precaution for long term driving?

4)What's your personal opinion on it, regardless if you have it or not?

 

[TNguy]

Are you talking about the return cooler like what is on PDs?


If so, read post #7 http://www.dieselplace.com/forum/3-...sions-upgrades/345670-why-cool-your-fuel.html

In my opinion, for longetivity, I would install one. But that's just me. I tend to do more for added insurance. Heck I installed PD150 head bolts this past weekend to be sure I wouldn't have any head lift. My wife calls it "TDI paranoia"

 

[Votblindub]

I was thinking along the lines of the one that my sedan has. It looks like an aluminum heatsink that's bolted on to the floor, just underneath the passenger side of the car.

 

[Honeydew]

I was thinking along the lines of the one that my sedan has. It looks like an aluminum heatsink that's bolted on to the floor, just underneath the passenger side of the car.

Those came stock on the PD and 11mm (auto) ALH. I installed one from a parts car on our ALH wagon. Might as well throw one on if you can find one, studs are there, bolts right up.

 

[tongsli]

You can modify your return lines or buy the correct fuel lines and keep the supply as a spare.

https://www.ecstuning.com/Volkswagen-Jetta_IV--TDI/ES307478/

 

[LNXGUY]

You can run a small simple rad in front of the car to use as a fuel cooler. Should be a lot more efficient then the under car setup the PDs have. That's what I was going to do on my ALH. I've still got te rad sitting in a box in my garage, lol.

 

[Votblindub]

Those came stock on the PD and 11mm (auto) ALH. I installed one from a parts car on our ALH wagon. Might as well throw one on if you can find one, studs are there, bolts right up.

Yes, that's the one. I have one on my sedan.

You can run a small simple rad in front of the car to use as a fuel cooler. Should be a lot more efficient then the under car setup the PDs have. That's what I was going to do on my ALH. I've still got te rad sitting in a box in my garage, lol.

I am fitting a FMIC upfront, I'm not sure If I can fit one in, plus running heaps of new lines in there isn't really something I want to do. I think the same as my sedan will work. I haven't managed to scrape that off the car yet!

 

[CNGVW]

I think a small transmission cooler would work fine.

 

[LNXGUY]

Yes, that's the one. I have one on my sedan.
I am fitting a FMIC upfront, I'm not sure If I can fit one in, plus running heaps of new lines in there isn't really something I want to do. I think the same as my sedan will work. I haven't managed to scrape that off the car yet!

You should have lots of room not having the SMIC in there anymore.

 

[Votblindub]

You should have lots of room not having the SMIC in there anymore.

Bill, that is a good point!

 

[Votblindub]

After a bit more research and consultation, I've decided to use a stock auto ALH fuel cooler in the stock location. It requires no extra fuel lines to be plumbed, less complicated, will suffice for my needs and I should be able to find one in a junk yard.

 

[panthers89fan90]

Depending on whether your fmic is same side or pass thru, you could definitely use either of the side grilles for a cooler. My fmic is a same side so I could use the driver's side grille.

 

[Votblindub]

Depending on whether your fmic is same side or pass thru, you could definitely use either of the side grilles for a cooler. My fmic is a same side so I could use the driver's side grille.

Mine will have a pipe on each side. I am also planning to use oem Bora foglights in the lower grille opennings. They're going to be occupied. I think the easiest location would be the stock location. The wagon won't be a really low car, so I'm not worried about the part being on the bottom. If I havent managed to rip off the one in my sedan yet haha.

 

[Tero P]

I think the easiest location would be the stock location.

And i think the extreme location for a fuel cooler is in spare wheel compartment

 

[Votblindub]

Oh, yes! That's a very large radiator WITH a fan, too! I think that's more than my set-up will require.
I'm sure the temperature drop will be much more significant with a core that size. It's likely more efficient vs a stock one, as well.
This set up will unlikely suffer from heatsoak.

 

[Tero P]

I have to do that because PD engine heats up returning fuel so much.
After 15 minutes at idle the fuel pressure dropped 1,1bar to 0,5 bar because fuel was so hot.

No problems with that anymore.
Now fuel temp stays same with outside temp.