Griffith demisting compared to Chimaera

[saxon]

I have a 92 pre-cat Griff and for years have found the demisting and heating/ventilation to be poor. The car is in for an MOT at present and I've been given a 97 Chimaera as a courtesy car. The difference in airflow through the vents is enormous. The dealer says that pre-cat Griffs have the fan for ventilation down by the radiator while Chims and later Griffs have it nearer the dash - hence the much improved ventilation.

My question is - how big a job is it to reposition the fan? Has anyone done it? Cost? Seems a very worthwhile mod to me!!

Saxon

[Wildfire]

I'm actually about to attempt modifying the ventillations system soon.

It's going to be pods out, and then I'm going to try and re-duct and seal all the vents from the blower onwards, also whilst switching out a faulty headlight and installing a new alarm (well 450Nick is doing that part).

I think a lot of the poor performance comes from inadequate sealing around the various pipes.

On a preliminary investigation of my system, I found more hot air coming our of the glove box than the vents.

I will take pictures and documentation as I get it done. I just need to find a free weekend.

[Ant.]

The basic problem on the early cars is air flow and direction control(up/down into cabin).

Direction control is difficult to improve without fitting a 500 airbox which have a better flap inside(IMHO).

On my car I fitted a 75mm pipe from the fan under the H/lamp up to the air box via a Griff 500 airfilter box.

This ensures that all the air the fan moves actually reaches the cabin, on speed 3 my heater actually whistles now!!

Not an easy job but the answer to screen misting....

[Wildfire]

Ant, any chance you could sketch up a brief diagram of what the set up is inside the inner wing, before I start pulling things out?

Chris

[Ant.]

Chris, not very good at sketches! Sorry. But if you know the Griff 500 air filter cover(sits on top of the panel filter), and imagine it attached to the heater air box, then you will have the idea.

I seem to remember having to shorten it slightly, but then used a hose between that and the heater motor for which I made and adaptor with an outlet on which send all the air to the heater box.....

[Barreti]

I've got a photo of my motor with ducting attached Wildfire, I'll post a couple when I get home tonight.
I wish I'd pulled a hose right through like Ant says though, even with ducting from the motor to the wing, and it all being sealed in, its still not what you'd call great.

[Colin RedGriff]

There's an article on the GP about improving ventilation for the early cars.

http://www.thegriffithpages.com/index.php?option=c...

[Wildfire]

Barreti said:

I've got a photo of my motor with ducting attached Wildfire, I'll post a couple when I get home tonight.
I wish I'd pulled a hose right through like Ant says though, even with ducting from the motor to the wing, and it all being sealed in, its still not what you'd call great.

cheers guys. Any pics would be helpful as I only have limited time to take the whole lot apart and modify. i will, of course, take a lot of pics.

[saxon]

Well, thanks for all the replies guys - not being particularly confident of my DIY abilities any idea of the approx labour and materials time for such a modification?

Saxon

[Wildfire]

No idea, but at least 2-3 hours to cut out the pods, then put them back in on it's own, I'd think.

I may start next weekend, so I'll keep people posted. All depends when my trusty assistan (450Nick) is around as he's going to be doubling up some work under the dash board.

[wolfm4n]

Hi all

The cabin heating, sorry cooling and demisting on my 99 griff is also awful...well, the heating is definately good !!!!!

I think i may have to attempt this rework also.........

Am i right in thinking from these posts that the only access to these two blower motors and ducting is by removing the actual headlamp pods ?

Are they fibreglassed in place ?

cheers

Ian

[Wildfire]

Yes, it's a pods out job. They're bonded in with the black sealant. Mine's going to have to wait until the new alarm arrives and I have a bit of urgent work to do on the Elise.

[Ant.]

wolfm4n said:

Hi all

The cabin heating, sorry cooling and demisting on my 99 griff is also awful...well, the heating is definately good !!!!!

I think i may have to attempt this rework also.........

Am i right in thinking from these posts that the only access to these two blower motors and ducting is by removing the actual headlamp pods ?

Are they fibreglassed in place ?

cheers

Ian

I wouldn't waste your time taking the pods out to get at the fan heater on a 500.















It isn't there

The tips above are for precat griffs.


Your issue sounds more like setting the hot/cold valve...