Hofa Mod Competed Today

[Jflow23]

Intercooler upgrade complete Thanks Hofahome!



Went Flat black on the brackets. I also elected to use 2x 90 degree pieces instead of 4 and bolted the cooler to the brackets instead of using the studs on the intercooler.

Gloss black touchup on the bumper support and mounting bolts.



System took almost an additional gallon of coolant and appears to double the available surface area.

I elected to keep my system divorced...the rationale is that the thermostat and the water pump will keep the engine at operating temperature. I'd like my supercharger to run cooler than the engine. By leaving them married, your charger coolant will eventually match the engine coolant temperature...negating the potential benefits and supported by APR research.

I also reset my coolant pump back to the PWM configuration for now. There is more volume to push around, don't want to overwork that pump until I have more time to experiment. I was originally going to wire in a switch...but lost interest in pushing wires through the firewall.

Also re-installed my KI 194 mm crank pulley. I was one of the original purchasers that did not receive a pulley with the offset hole. As a result, it was not perfectly aligned and the charger would squeal if I didn't run a 6-rib belt on the outward ribs. The misalignment was not very visible but a problem none the less. I pulled and drilled a slightly larger hole, then reinstalled...alignment fixed. While I was in there, I replaced the serpentine belt, supercharger roller, supercharger belt and tensioner. I should be maintenance free for a while.

[Adrenalin Junki]

Nice write up.

Sent from my VS990 using Tapatalk

[Hofahome]

Sweet man! I feel honored to have a mod named after me haha! Agree with decision to divorce. Keep us updated on how it is working.

[lowjonathan]

nice write up...

[Jflow23]

Divorced system is completely cool to the touch at the heat exchanger.

Radiator is insanely hot...even my divorced reservoir is touchable below the fluid level. Above the fluid level, the reservoir matches the crazy underhood temps.

Pretty good mod for the price...butt dyno approved.

[KnightR]

Can someone point me in the right direction to find more information on the Hofa mod? I tried searching and I think I remember reading a thread but can't find it through a search.

[theweebabyseamus]

Can someone point me in the right direction to find more information on the Hofa mod? I tried searching and I think I remember reading a thread but can't find it through a search.

+1

[xpoweruk]

http://www.audizine.com/forum/showth...ervoir-upgrade

[-leman-]

Just a wild thought - will a second OE intercooler fit above the crash bar? If yes, what are the benfits of the aftermarket ones (which everybody uses for stacked systems) over OE?

[xpoweruk]

Just a wild thought - will a second OE intercooler fit above the crash bar? If yes, what are the benfits of the aftermarket ones (which everybody uses for stacked systems) over OE?

All alloy construction & larger surface area are the main reason for aftermarket heat exchangers.
Also I think that the OE cooler would be a struggle to fit in due to the length

[-leman-]

OK, makes perfect sense. Thanks!

[waxxonMTL]

So those are the instruction to divorce the system ? no need for special hose then ? just regular hose and cut it the size you need ?

Hose install:


A quick side note for the B8.5 stock supercharger cooling system: The bottom tube on the stock HE is coming FROM the s/c and thus carries hot coolant. Obviously then the top hose is carrying cool coolant TO the pump. (Also remember that the lines on the supercharger are reversed. Ie. bottom is cool and top is hot).



1. Cut some of the protective plastic out on the driver side by the crash bar to allow hoses to pass from the new HE to the stock HE

2. clamp the hose that is connected to the top of the stock HE and pull it off. Some coolant will spill so put a small oil pan or something else under it. Keep it clamped.

3. Mock up the new coolant hose for how much you will need to run between the BOTTOM of the NEW HE and TOP of the STOCK HE. Make sure there are no kinks. I used about 2-3ft so it would not kink.

4. Cut the hose and attach via hose clamps. I also used some of the suspension clamps in areas where the hose would contact any hard plastic or metal parts

5. Do the same thing for the top hose. It will run side by side with the hose you just installed. This will connect to the hose that is currently clamped, but not yet.

6. When you are happy with how this hose will run, attach the top hose to the new HE. Mix the coolant and pour it into this hose with the funnel. I tried to hit the new HE several times to allow the air to escape. Fill until the hose is mostly full

7. You are going to need to pass the hose through the area to where it will connect. I found the best way to do this is to kink it with your hand so the fluid will not come out and hand it to someone else on the other side. Then clamp it. Use a straight coupler/hose clamps to attach both clamped hoses. Then unclamp them. This new “hose” should be running from the top of the new HE to the bottom of the T that goes into the inlet of the pump.

8. At this point if you do not want to add a reservoir, this system should function well and you can bolt everything back up/check for leaks while running the motor. See next section for the reservoir.

[Jflow23]

So those are the instruction to divorce the system ? no need for special hose then ? just regular hose and cut it the size you need ?

Divorce is the next set of instructions...installing the reservoir. What you quoted was the intercooler install.

Divorce requires a separate reservoir for overflow. APR uses a tiny one while REVO and AWE use larger ones.

Divorce requires you to disconnect the line from the electric pump to the expansion tank and cap the line coming out of the main expansion tank that goes to the electric pump.



Then connect a single barb reservoir of your choosing to the hose you disconnected coming from the pump.



And

[bayonet14]

So when I go the route for a dual pulley - the HE is gonna have to be a upgrade yes?

[waxxonMTL]

oops LOL !! alright, i should've read more carefully :) thanks !

[Jflow23]

So those are the instruction to divorce the system ? no need for special hose then ? just regular hose and cut it the size you need ?

If it's still unclear, checkout APR's instructions...

http://www.goapr.com/support/install...8s4_cps_v2.pdf

Steps 8-10 should clarify everything, wish I would have looked at those instructions as I was figuring this out myself.

I wish some manufacturer would build and sell an elegant expansion tank and bracket for a reasonable cost...my solution is less than perfect from an aesthetic standpoint and I'm still looking for a more apealing reservoir.

[lowjonathan]

If it's still unclear, checkout APR's instructions...

http://www.goapr.com/support/install...8s4_cps_v2.pdf

Steps 8-10 should clarify everything, wish I would have looked at those instructions as I was figuring this out myself.

I wish some manufacturer would build and sell an elegant expansion tank and bracket for a reasonable cost...my solution is less than perfect from an aesthetic standpoint and I'm still looking for a more apealing reservoir.

thanks man

[Hofahome]

I wish some manufacturer would build and sell an elegant expansion tank and bracket for a reasonable cost...my solution is less than perfect from an aesthetic standpoint and I'm still looking for a more apealing reservoir.

I agree. Before I looked I thought it would be cake to find something that worked. Not even close.