Gauge dimensions Griff
Discussion
Hi all,
I'm new to this forum, I've recently become a Griff owner for the first time. One of few here in Sweden where I live!
I'm in the middle of restoring and somewhat modifying my car and as always questions arise. Many answers can be found in this excellent forum, I have noticed. You guys can really inspire when hours on the garage floor begins to feel dark...
Working on the dash and dials right now. Apparently there are different sizes of the gauges, the smaller ones seem to have either the aftermarket standard size 52 mm or the more odd 61 mm (approx) as on my car. Are the bigger ones harder to find as spare? More expensive, I assume. Maybe look a little less kit car-like in car...?
As for the speedo and tacho, are there different sizes here also? I've seen some smaller deviations of say 1-2 mm in different dash holes. Looking for a replacement for my wasted speedo, found a seller on Ebay ("mookeys-dad") who lists a couple of "TVR speedos" without specifying model or size. Perhaps not needed if they are all practically interchangable? What about the sensor?
And then... the colour of the facia. How do I know if mine is biscuit, buff or oat? It looks like buff, or biscuit. Or...
/Stefan
I'm new to this forum, I've recently become a Griff owner for the first time. One of few here in Sweden where I live!
I'm in the middle of restoring and somewhat modifying my car and as always questions arise. Many answers can be found in this excellent forum, I have noticed. You guys can really inspire when hours on the garage floor begins to feel dark...
Working on the dash and dials right now. Apparently there are different sizes of the gauges, the smaller ones seem to have either the aftermarket standard size 52 mm or the more odd 61 mm (approx) as on my car. Are the bigger ones harder to find as spare? More expensive, I assume. Maybe look a little less kit car-like in car...?
As for the speedo and tacho, are there different sizes here also? I've seen some smaller deviations of say 1-2 mm in different dash holes. Looking for a replacement for my wasted speedo, found a seller on Ebay ("mookeys-dad") who lists a couple of "TVR speedos" without specifying model or size. Perhaps not needed if they are all practically interchangable? What about the sensor?
And then... the colour of the facia. How do I know if mine is biscuit, buff or oat? It looks like buff, or biscuit. Or...
/Stefan
Thanks for the welcome!
Mine are as in the second picture, it's a Griffith 500 1995 with cat.
I think that there may be size variations also on later post-1995 Griffs with cat. The thing is that I just received a carbon fibre dash from ACT made from a spare that was available at ACT. I did not send in my standard dash for preparation as I only have a Leven alu which I want to keep. The disposition of the gauges is correct (as for 1995-onwards), but the sizes of the holes are too small (52 mm). Since I like the bigger gauges better I will probably simply make the holes bigger.
More strange is the two big dials, speedo and tacho. These holes are just slightly smaller on my new dash. Since I'm looking for a replacement speedo this worries a bit, will all speedos 1995-onwards fit?
Mine are as in the second picture, it's a Griffith 500 1995 with cat.
I think that there may be size variations also on later post-1995 Griffs with cat. The thing is that I just received a carbon fibre dash from ACT made from a spare that was available at ACT. I did not send in my standard dash for preparation as I only have a Leven alu which I want to keep. The disposition of the gauges is correct (as for 1995-onwards), but the sizes of the holes are too small (52 mm). Since I like the bigger gauges better I will probably simply make the holes bigger.
More strange is the two big dials, speedo and tacho. These holes are just slightly smaller on my new dash. Since I'm looking for a replacement speedo this worries a bit, will all speedos 1995-onwards fit?
My "new" Cerbera speedo to the right, the old Griff to the left. As seen there are differencies, but both have three cables to make the speedo work (aside from the extra cables for a couple of warning lights on the Cerb).
Do you think I will do with my existing sensor or do I have to get a Cerbera specific one? I've seen Chimaeras with this type of speedo also. And not to forget - does anybody just happen to know which cable to put where? TVR and proper wiring diagrams don't seem to be very compatible.
Ozstyle, thank you for your informative answer! Makes things much clearer. There's a lot of expertise on this forum, I've noticed as the newcomer I am.
My Griffith is a late 1994 and has the black rimmed ETB gauges and a GKN diff with 16 tooth trigger wheel on prop shaft (just checked).
So, here I am with a Caerbont speedo intended for a BTR diff with 48 tooth (or so) trigger wheel on the drive shaft. OK, so these would be my alternatives then (note the question marks):
- Keep the 16 tooth trigger wheel and recalibrate the speedo. I haven't the slightest idea how this would be performed. Anyone?
- Fit a new 48 tooth trigger wheel to my GKN diff. Well, I guess that such part is not available anywhere, especially as the BTR uses the driveshaft and not the propshaft for this purpose. Perhaps I will have to fabricate one myself, or has anyone already ...? Please let me know.
- Switch from GKN to BTR diff altogether, hmm... does not make much sense that a simple speedo swap would lead me to an extensive (and expensive) operation like that, eh...
My Griffith is a late 1994 and has the black rimmed ETB gauges and a GKN diff with 16 tooth trigger wheel on prop shaft (just checked).
So, here I am with a Caerbont speedo intended for a BTR diff with 48 tooth (or so) trigger wheel on the drive shaft. OK, so these would be my alternatives then (note the question marks):
- Keep the 16 tooth trigger wheel and recalibrate the speedo. I haven't the slightest idea how this would be performed. Anyone?
- Fit a new 48 tooth trigger wheel to my GKN diff. Well, I guess that such part is not available anywhere, especially as the BTR uses the driveshaft and not the propshaft for this purpose. Perhaps I will have to fabricate one myself, or has anyone already ...? Please let me know.
- Switch from GKN to BTR diff altogether, hmm... does not make much sense that a simple speedo swap would lead me to an extensive (and expensive) operation like that, eh...
Thanks Oz, I will do the test that you're suggesting, putting the back end on stands and simply see what the gauge is reading at different speeds.
It hit me that the prop shaft and output shafts obviously are not rotating at the same speed due to the ratio in the diff, so simply copying the amount of teeth from the GKN trigger wheel to a new home made wheel to put on the prop won't do the trick...
/Stefan
It hit me that the prop shaft and output shafts obviously are not rotating at the same speed due to the ratio in the diff, so simply copying the amount of teeth from the GKN trigger wheel to a new home made wheel to put on the prop won't do the trick...
/Stefan
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