BB4 bye,bye

Post by **vanzep** » Mon Jun 09, 2014 5:14 pm

cheers guys - its one job im actually looking forward to doing

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Mon Jun 09, 2014 5:19 pm

vanzep wrote:
wurlycorner wrote: What's the difference between a JDM and UKDM fan?
different mounting points and jdm (BB4) fan shroud is also smaller by an inch or so
Ive got both sitting here so i could take some pics and measurements if needed.

Well surprising! Can't imagine why on earth they'd need to make them different?

Post by **vanzep** » Mon Jun 09, 2014 5:32 pm

BB4 had a different radiator - slightly smaller width and height but twice as thick as UKDM rad.
So i guess it follow the fan shroud would be smaller and have different mounting holes.
Heres a couple of pics

JDM on left - UKDM on right

you bought a BB4 just recently so will find there are a few slight differences to other 4th gens

Theyre special

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Mon Jun 09, 2014 5:55 pm

Arrrr, but again - why?
There's nothing else different about the front of the car, so I just can't think why they did it?! Would have thought the cost saved by the reduced height would have been off-set by the costs of thicker core and design/tooling/stocking/managing production line for different components, when there's no need. same engine, so cooling capacity demands are the same.

Odd. Anyway, moving on...

Post by **Donald** » Mon Jun 09, 2014 6:15 pm

I have a question about fans @wurlycorner.

Which is the most efficient design (assuming same diameter):

More blades but smaller blades
Less blades but larger blades

Or is it all much of a muchness?

Only asking as the difference between UKDM and JDM rads on the 5G, aside from cap type, is the no of blades on the fan (as it seems to be for the 4G?). Wondered if it was a climatic decision, but even that is ridiculous considering Japan has everything from tropical forests to very cold snowy winters

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Mon Jun 09, 2014 6:19 pm

Pm'd so we don't spam vanzep any further

Post by **vanzep** » Sat Jun 21, 2014 7:56 pm

Fitted my Koyo Racing Rad today.

Here are some pics:

As you can see from the photos it wasnt a straight fit. The crossbeam had to have a couple of small notches put in it but the mounts top and bottom were spot an and the rad sat level and with just enough room to close the bonnet. The OEM fan shroud had one notch put in the side to clear the earth cable on the battery tray and we had to lose one of the mounting lugs altogether. In addition to this we had to cut down the 4 shroud mounting pionts on the rad itself. Now the oem fits like a glove. Obviously this was a load of work so thanks again to @3rd gen steve and @Merlin for their help otherwise this radiator would be going back in box

One good point to note is if you have a traction bar set up then this would be a straight fit with no modifications needed

mercutio · Post by **mercutio** » Sat Jun 21, 2014 8:03 pm

great work

Post by **si import** » Sat Jun 21, 2014 9:43 pm

good work mate

Post by **Drax** » Sun Jun 22, 2014 12:31 am

great work bud!!

Lude Generation

BB4 bye,bye

Re: BB4 Let the cooling commence

Re: BB4 Let the cooling commence

Re: BB4 Koyo Racing Rad fitted