Slow speed

flyingbanana said:

I've just recently got my series 2a 109 it is fitted with a perkins 3.3 diesel engine and appears
Really great but is it slow or what 50-55 mph ish might do more down hill but is it possible to make it faster I was told I could change the diffs with a better ratio has anyone done this if so any pointers to help me possibly do this, I'm assuming it has standard axles fitted it doesn't look as if they have been changed
Thanks Andy

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cornish rattler said:

It sounds like the engine was originally from an old fork lift or plant equipment so the FIP will be set for commercial use and needs setting for road use then there should be no reason it shouldn't do less the 80 mph, hope this helps, and that's with std gearing and diffs

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300bhp/ton said:

That doesn't add up. Just looked at a gearing calculator and 4.7:1 diffs and standard 29" tall tyres (205's) would give you 79.8mph @ 5000rpm. No way an old diesel like that will be running 5000rpm in top or more!

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cornish rattler said:

It sounds like the engine was originally from an old fork lift or plant equipment so the FIP will be set for commercial use and needs setting for road use then there should be no reason it shouldn't do less the 80 mph, hope this helps, and that's with std gearing and diffs

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cornish rattler said:

It sounds like the engine was originally from an old fork lift or plant equipment so the FIP will be set for commercial use and needs setting for road use then there should be no reason it shouldn't do less the 80 mph, hope this helps, and that's with std gearing and diffs

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flyingbanana said:

What is FIP can you explain please
Andy

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Bobsticle said:

If you charge about at 80 in a series you want beating. Apart from not being able to stop you’ll destroy anything or anyone you hit.
Down right irresponsible. Get a bleedin track car.

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300bhp/ton said:

That doesn't add up. Just looked at a gearing calculator and 4.7:1 diffs and standard 29" tall tyres (205's) would give you 79.8mph @ 5000rpm. No way an old diesel like that will be running 5000rpm in top or more!

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cornish rattler said:

my 2a fitted with a tweaked 200 tdi will do 95 but i don't cruise at that speed i just did it to try it.

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neilly said:

With all honesty, I would love to see the gearing and tyre size behind this.
At 90 Mph my 90 300tdi is screaming and I reckon would need a long runup to hit 95, but that is using 2x gps devices to confirm speed . Obv this was a private runway.

Cheers

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neilly said:

With all honesty, I would love to see the gearing and tyre size behind this.
At 90 Mph my 90 300tdi is screaming and I reckon would need a long runup to hit 95, but that is using 2x gps devices to confirm speed . Obv this was a private runway.

Cheers

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cornish rattler said:

A6 bypass derbyshire on Saturday GPS speedo

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