Mike Simard

It's time for me to order some gages for a fresh build. Are any of the stock 928 sending units usable with common aftermarket gages? Any thoughts appreciated.
The big question is the resistance ranges. The oil pressure unit might be a problem, does it have an internal 5 bar limiting mechanism?

AO

I'm not sure what, if any, limit there is on the stock OP sender, but you could use an Innovate Auxbox along with the XD-16 gauge and hook up to and log / display just about anything on the 928.

You may want to verify that this can be done with "Z" here on the list. He proabbaly knows the most about the innovate stuff.

FYI, here are the corresponding values for the sender on a 89+.

mark kibort

So far, all the aftermarket gauges on a 928 that ive seen and used on the track are a NIGHTMARE.
Why not just use the stock gauges, they work SO well!!!
mk

Jim bailey - 928 International

Mark this is Mike , he is probably going to mill out a custom billet dash just to hold those gauges !! Why ?? because he can !

FlyingDog

The oil pressure and temp senders should be standard VDO resistance ranges.

Mike Simard

Mark might have a point about problems arising from mixing sending units and gages. It would be nice to keep the pod, the cracks add character and it's brown too! It wont however fit the cage cross bar but the real reason it's outta here is I want to mount gages in an ideal location. That would be as close to line of sight as possible without being in it.

It looks like it might be a good bet to order new sending units from the gage manufacturer. That might require some adapting fittings but the gages will be more likely to be reliable.

It would still be good to hear from "Z"

Thanks for the great input!

largecar379

I seem to remember that Autometer makes mechanical sending unit gauges (far superior to electric sending unit gauges) that are available with metric threading to put in the 928 block.

They probably have electric sending units gauges as well, if you aren't comfortable with then mechanical ones.

Your choice, but if i was putting in some, I would go mechanical (oil pressure, water temp, boost [if blown], etc.) You could also do temp gauges for engine oil, air intake, trans/rearend oil, etc.......if you have a track car, it would be a good idea to have these in addition to the basics.

As for mixing and matching, it's probably not a great thing.

Then again, you could use a "T" fitting, and hook up both your OEM 928 sending units with the mechanical units as well. That way, you wouldn't have dead gauges in the dash..........

--Russ

Flott Leben

As a very wise Jim Bailey pointed out in a thread long ago - you probably do not want mechanical guages for some functions, such as oil pressure or fuel pressure, on the dash, inside the firewall or near the driver. If they were to break, crack, leak, etc. - big trouble for the driver.

mark kibort

Mike,

It was only an opinion, based on what ive seen, and the knowledge limit i have on such a project. From what Jim says, might be able to craft something up very nice! personally, if you could do a smaller pod, that is lighter weight and allows for a better cross bar, that would be a good thing! plus, you could integrate shift lights, etc as well. But, the ones ive driven, have been riddled with problems of inaccuracy, jumping needles, and intermittant functionality.

keep us posted on what you end up putting together!

MK

Fabio421

Dr.Nick has a cool custom pod with aftermarket gauges. He may be a good one to ask.

I may have his name wrong. I am refering to the gentleman in the EU who has the orange 928 S2 with the CF hood vents and the black headlight surrounds.

Jim bailey - 928 International

They do make and sell isolators ,devices with a diaphram inside that you place in the line before it enters the cabin but that is two more connections (for leaks) and something else to buy and mount to the car.

drnick

but it keeps me amused. i went with racetech gauges which are capillary fed, i had a desire to improve on the accuracy of the standard pod. i think if i were doing it for a track car i would keep it simpler and probably stay with electric senders and gauges - i just liked the look of the round faces and analogue needles.

John Veninger

Haven't seen mine then. I have no stock 928 gauges.

The oil pressure sender might be the only "standard" sensor that would hook up easily to an after marker gauge. That is the only stock sensor I'm still using. All others are after market to feed the Mychron and DTA

Mike Simard

drnick, that is beautiful!

largecar379

interesting......In thirty years of using mechanical gauges, both in my drag cars and in my Eighteen wheelers, I've never had a line/gauge break causing fluids to enter the driver's area. the lines were always grommeted and routed away from anything hot, and the gauges were solidly mounted to the dash.

Of course, all fuel pressure gauges (gasoline--not diesel) were outside the cockpit for safety reasons and sanctioning body rules.

I have had plenty of failures with electric sending units gauges, but no failures with mechanicals. not to mention, the mechanicals were always accurate, which it more than I can say for the electric ones.

my three cents worth......

--Russ