Gearbox advice

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gypsy
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Gearbox advice

Post by gypsy »

I'm putting in a creative IRS setup and I wanted to get the best gearbox for this set up. The van will mostly be for burning around Cornwall so not really for those long motorway journeys, however I like the sound of keeping the revs down and the engine cool (i'm not really sure thats how you keep a AC engine cooled).
Its a 75 fleetline, but I will be using a Bay window IRS conversion set up with a 1776 twin carb engine.
Any suggestions or knowledge anyone can pass on I will be very grateful.

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jamiealex
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Re: Gearbox advice

Post by jamiealex »

Hi, I take it you already have an IRS? If not I have one for sale and am in Cornwall.

gypsy
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Re: Gearbox advice

Post by gypsy »

Hi Jamie
Ive got the IRS, Ive also had a few discussions with people and as I will be mainly poodling around Cornwall in the bus. I have been told a freewheel flyer or the 3.88 ratio gear would be annoying as I would constantly be tweaking back and forth from 3rd to 4th up the hills.
So its a straight axle IRS, normal 4.125 ratio gearing with a 1776 engine

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Re: Gearbox advice

Post by ernie »

Hi.
I had a 1776 with irs in my split with a dc code gearbox (type 3)..is seemed spot on.

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vwJim
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Re: Gearbox advice

Post by vwJim »

gypsy wrote:
Tue Oct 08, 2019 7:25 am

So its a straight axle IRS, normal 4.125 ratio gearing with a 1776 engine
SA and IRS are two completely different systems.

IMHO I wouldn't fit the Bay based IRS.

If you're not looking for high motorway speeds, your current setup is fine. Actually your bus will accelerate slower / work harder up hills with the IRS.
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Andy C
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Re: Gearbox advice

Post by Andy C »

If its any help I've got a similar engine set up to you with IRS & a Freeway flyer fitted. It's great on motorways for 70mph cruising but on 'A' roads I'm dropping to 3rd regularly.
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Droger45
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Re: Gearbox advice

Post by Droger45 »

Andy C wrote:
Fri Nov 01, 2019 11:56 pm
If its any help I've got a similar engine set up to you with IRS & a Freeway flyer fitted. It's great on motorways for 70mph cruising but on 'A' roads I'm dropping to 3rd regularly.
That sounds a good set up with flyer fitted nicely.

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Re: Gearbox advice

Post by gypsy »

I think I need to ask my garage what I'm having fitted as i know its a straight axle, no reduction box, and I know its an IRS setup.

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Re: Gearbox advice

Post by e m p i »

err, you might want to ask them if they know what they’re doing if they’ve told you you’re having a straight axle IRS because you can only have one or the other - they are completely different systems.
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