Let us know how your upgrade works out.

I upgraded just the ground wire on a new stock blower motor to 10 gauge wire, making sure it had good contact to the frame, and it made a big difference and blows much better.

 

I did that on mine too, years ago, grounded directly to block.. I couldn t really tell much difference, but changing that Wheel is definitely NOTICEABLE!!

 

The difference is amazing as I can now feel wind blowing from my center vent clear back to my rear window or about 36" away.

 

ALL DONE! Its is a very tight spot on an 81, you have to do everything from the top. BUT... IT REALLY DOES MAKE A BIG DIFFERENCE!!! you have about 1/3 nmore wheel, with larger, more pitched blades, it moves air now.. Only costs $16 , a few hours of cussing, probably a 12 pack of beer will help !! .....If any of you decide to do it, get with Steve or me, we can save you time by telling you exactly how to modify everything.. You only need the wheel, not a C4 motor too, as some have said. .. In my black car it will be nice.. Its 104* today

 

Anyone have the part number for the fan?

 

No, when fish and I did it we just told the parts man we wanted a blower wheel and didn't care how big or how long it was.

Of COURSE we have a part number! It's a 4-Seasons #35601 and it's an inch longer than the stock wheel.

To put the longer wheel in you'll need a 3/8" thick plywood spacer and 1' long #8 hex head metal screws. I can send you a picture of the spacer that I scanned but you might have to reduce it's size as when I sent it to fish and he printed it it came out about 4% too big.

If you're serious about doing the upgrade I'll send you the pictures I took along the way. Here's the picture I took of the new wheel and the original wheel and also a picture of the plywood spacer glued onto the motor's flange.

 

LOL!! Toobroke you are a nut .. HAHA ... yeah, that's what I used too ,4 Seasons 35601 STEEL ... AMAZON has them for $16 and free shipping .. by the way, nothing less than a 3/8 spacer. that's the bare minimum on mine ..

 

If your C3 has A/C it's definitely worth the small expense and effort to make the modification because it'll damned near double the air flow. I can actually feel the cold air hitting my face and right ear as I drive along.

Another thing you need to do is completely seal your condenser to the radiator frame to prevent air from being sucked in from the sides of the condenser. Before I sealed mine my A/C was totally worthless in town but now it works great in stop-and-go traffic.

 

Well, I have to say, the new blower upgrade is even better when driving down the Interstate.. It moves a lot more air and I actually had to turn it down in 100* heat ... A big pain in the *** to do, but well worth it to me .. Especially in a Black car. AND grand total of $16 spent

 

If anyone else wants to make the conversion I will be glad to help them out. The 1" longer C4 blower wheel will give you over a 40% increase in output and you can easily see why.............

 

Okay, I ordered the fan you guys suggested. Tips on the installation and spacer?

 

The spacer needs to be 3/8" thick plywood with a 5-3/4" I.D. and a 7" O.D. If you don't have a compass to draw it onto the plywood give me your e-mail address and I'll send you a full size picture (I scanned it). When you print it make sure it's 7" O.D. and if it's not reduce or increase the size until it is 7".

 

Lose weight first.,its tight in there....lol.. seriously, get the spacer pattern from Toobroke, I had to reduce it 5% on my printer to be perfect. lay out on any material you choose that's minimum 3/8 thick. cut out. remove old blower wheel, fit spacer on motor, be sure you have plenty clearance for new wheel. glue and/or screw together .drill bolt holes thru spacer, . grind ,sand about 1/8 inch out of the hole in blower hsg. .. remove wheel before placing motor in fenderwell.. reassemble in fenderwell. [ IT WILL NOT GO IN THERE ASSEMBLED, or at least I couldn t get it in] place motor/wheel in housing, start screws [ need 1/2inch longer screws now] turn on fan to be sure it doesn t rub anywhere.. tighten screws , check for leaks reconnect hose to motor ... I sealed everything on mine with silicone .. did that help? now enjoy about 40% more cold air in your face... OHH one last thing, remove the Expansion tank bottle!!

 

Dang wish i would have known about this when i replaced the blower motor. A few years ago

 

Just take it back out and do the modification.