Tacho Calibration

**Johnno** · 01-06-22, 11:41 AM

Very Nice.. I had my holden dash and gauges refurbished by the dash doctor in Melbourne. It was many many years ago and I recall paying about $450.
The dash needed some new gauges, decals, needles and cracks filled and completely painted.

OEM parts are expensive nowadays thou'..

**lsemmens** · 01-06-22, 12:28 PM

I had an XT ex taxi, it had a 3.6 engine that was a freak (it would eat most small bore 8s for breakfast. I modified the original dash to take the extra gauges a la GT, so I can appreciate what you are doing. I loved that car, as did my wife, It was a sad day when we had to trade it for something more practical when we had kids. Mate had an XT GT sleeper, it was pure phase 3 down to the the dash! Are you fitting a four speed or auto?

**RedXT** · 01-06-22, 02:16 PM

Originally Posted by lsemmens

I had an XT ex taxi, it had a 3.6 engine that was a freak (it would eat most small bore 8s for breakfast. I modified the original dash to take the extra gauges a la GT, so I can appreciate what you are doing. I loved that car, as did my wife, It was a sad day when we had to trade it for something more practical when we had kids. Mate had an XT GT sleeper, it was pure phase 3 down to the the dash! Are you fitting a four speed or auto?

I have the original v8 motor so i am now running a later model 302 roller block xw phase 1 cam 670 holley and c10 auto with stage 3 shift kit

**wotnot** · 01-06-22, 05:37 PM

The C10 would drive me nuts =) That was part reason why I sold the Brougham years back ; couldn't afford/get and overdrive for the powerglide it, plus no direct drive/converter lockup clutch...fuel economy 8)

**RedXT** · 02-06-22, 09:20 AM

Originally Posted by wotnot

The C10 would drive me nuts =) That was part reason why I sold the Brougham years back ; couldn't afford/get and overdrive for the powerglide it, plus no direct drive/converter lockup clutch...fuel economy 8)

With the shiftkit it can be driven just like a manual and will pull 120kph in second, at 100kph in top gear it sits on 3100rpm

and when I drive it to the pub on Saturdays the mrs has no problems driving home in D for drive, Winner

**wotnot** · 02-06-22, 12:24 PM

Originally Posted by RedXT

With the shiftkit it can be driven just like a manual and will pull 120kph in second, at 100kph in top gear it sits on 3100rpm

Yeah...last conversion I did was to a 2nd gen Bronco XLT ~ swap out the C6 for a 4R70W ; first 2 ratios are a little shorter so it accelerates/pulls a bit harder, but the bonus is when in OD with torque converter locked ~ 100kph = 2200rpm =)

edit: silly footnote ~ the Bronco had a reciprocating piston type A/C pump not a rotary pump ; customer complained of a weird throbbing noise when in OD with TC lock...took us a while to find it. Turned out that around 2100rpm it'd get this rhythmic beat happening between the power pulses of the smallblock v8 and the compression pulses of the A/C pump, and this'd play out on the drive belt ...go figure =) Apparently Ford in seppoland had come across this as well with the first AOD auto trannies, and there were different diameter pulleys available to move the A/C pump rpm away from the resonate frequency when cruising at 50-60mph ...rotary A/C pumps effectively solved the issue 8).