TheSamba.com :: View topic

Thu Jan 01, 2004 11:46 am

What is the story on these things. Advertised to be 1.5 wider then stock. Has definitely got to provide more air flow, but at what costs?

Building a stock DP1600 for a daily driver Thing so I am looking for mileage and reliability over performance.

Thu Jan 01, 2004 12:24 pm

There are two widths of fans for VW. One fits a non-doghouse shroud, the other fits a doghouse shroud. What you saw advertised is a company that doesn't know what they are selling. I would steer clear of them.

Thu Jan 01, 2004 1:29 pm

Ask them for dyno results...

HMMMN..... Betcha they say they don't have any!

I have found that MORE AIR is not the key, but specifically controlling the route of the air is.

VW went to the wider fan when adding the doghouse oil cooler- it gives more air and that air is designed to be routed to the oil cooler, not heads.

when I do my test work I'll be testing the early and 71+ fans both on the same engine with my TI DTM. The way the DTM is designed the heads may actually benefit from the wider fan since its air is all going to the heads. The TI DTM oil cooler is fed its air from 17% of the shroud that normally has no purpose in a stock TI shroud.

We'll see in about 2 weeks!

BTW, where does this wider than stock fan come from? I'd like to get one to test. maybe I'll sell them the results.

Thu Jan 01, 2004 6:01 pm

Advertised in JC Whitney as a High-Volume engine cooling fan. States that it is 1-1/2inch wider then stock fan and also states it will fit a 71-79 model years. Which would make me think that it is wider then the stock fan used on a Doghouse.

Thoughts

Thu Jan 01, 2004 6:20 pm

It's a 1 1/2" wide fan. JC Whitney printed thier catalog wrong (online and in print). It's a stock doghouse fan. Nothing more.

Thu Jan 01, 2004 6:40 pm

A fan any wider would be almost impoosible to fit in a stock shroud.... I was wondering how the hell another inch would do it...

I graduated from JC whitney when I was 14 years old..... Thats back when an 1835 and a 2180 ruled, and slapping oil coolers OVER the cooling fan was a great idea.

Support VW establishments, leave JC Whitney for cheap bastards that like to play with chevy 350s!

Fri Jan 02, 2004 7:55 pm

would love to support VW establishments, but the shipping sucks to Hawaii and Alaska....so for the time being gotta be a cheap bastard. Built a Baja while in AK via JCW parts.....bad boy is still running great here in Hawaii.

Fri Jan 02, 2004 8:43 pm

More then two different fans are available. If you run your motor at slow RPM's like parades ect. then the wide fan is great, but it does take more HP.
We run the early 40hp on all or off road race cars as they are thinner and have about 1/3 less vanes. This fan takes less HP and we don't do a whole lot of ideling. If we are fighting heat build-up on large open motors, we get rid of the heat with extra oil cooling. See item #10a -> http://www.1800vw.bizhosting.com/0.cooling.fan.htm

Fri Jan 02, 2004 9:32 pm

But, oil coolers do not cool the heads.

Fri Jan 02, 2004 10:22 pm

Yep.... Not at all AND oil temps are never an issue without RPM. RPM= friction. Friction = Heat

The oil sucks most of this friction induced heat up, but it can't do much with it.

You can have 10 gallons of oil capacity, and 15 external coolers and still fry your heads in 10 minutes of thermally overloaded playing!

I have every fan from a 25 horse clean to a 79 beetle. I also have every stock shroud that will fit on a 1600cc engine from the factory, including the VW Gol system. I also have a dry sump pulley, 2 different power pulleys, a 40 HP lower pulley and a 1600 lower pulley.... AND the stock size TI generator pulley as well as the smaller diameter 356/912 pulley...

All this is for test work starting 1/15/2004

No more guesswork, as all these suckers as well as the 911 systems and my TI DTM is getting tested.No more myths, and no more educated guesses.

They'll be getting tested for power loss, overall cooling ability, and I'll even be testing the "Super cool tins" and gaining direct data with them against the stock deflectors.

All on top of a 2165 TI with 10:1 and a Web 121 and 48 dells. After the engine is optimized, the tuning won't be touched for atleast 30 hours.

BTW, if you use a narrow fan with a stock doghouse shroud- Your stock oil cooler is now a just a radiator with no air going through it.

Fri Jan 02, 2004 10:33 pm

Jake, are you going to test the 20% larger crank pulley also?

Sat Jan 03, 2004 12:00 am

Don't have one... Do you guys have them?????

Sat Jan 03, 2004 10:16 am

Yes, but you have to clearance the full flow cover to get it to fit. It's pretty big.

Sat Jan 03, 2004 1:04 pm

hey jake, i know you're into the uprights, but have you done any testing on the pancake style like in a type 3? i'm curious to how the cooling compares.