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   All Posts (Fandatstick)




Fandatstick
Re: A12 head on A14
#131
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Quote:

rbastedo wrote:
Just about all my miles are on the freeway.
I never get above 25 mpg.


You have a problem. Should be at least 10mpg better.

Posted on: 2008/6/28 23:01
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Fandatstick
Re: Project: ddgonzal's Sunny Truck
#132
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ddgonzal wrote: What a wonderful sound dual sidedrafts make, something 1200rc you've been telling me for years and now I hear it myself. ... the rubber insulators between in the manifold and the sidedrafts are cracked.


Very nice looking vehicle. Modded A14 should be plenty of fun especially on the road.

There is nothing quite like the sound (music?) of sidedrafts burbling away.

Regarding the airleak, you're probably already onto it but the "O" ring type insulators between the carbs and manifold are a good bet (Either the metal type with rubber molded to them Or the plastic type with an "O" ring on each side.)

Posted on: 2008/6/23 9:22
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Fandatstick
Re: Will this work in an A12?
#133
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Quote:

Bandit_blues wrote:
I left that idea of the dellortos because of the fuel consumption.

My experience is that there is a common misconception that sidedrafts aren't fuel efficient.

So long as they are properly set up they are fine. One carburetter throat per cylinder is actually the most efficient there is.

A properly tuned (ie correct air/fuel ratio) 100hp engine uses the same amount of fuel regardless of carbureter type. If you don't want to use more fuel, don't use all the power (or perhaps don't modify the engine).

Posted on: 2008/6/20 9:29
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Fandatstick
Re: is a h89 head a A12GX? head
#134
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Quote:

Matto1kUte wrote:
then i cant explain the hi compression and the ports being up higher than A15 gasket (only by 1 or 2mm)

I have 2 A12 GX heads. The tops of the inlet ports actually remain exposed/open with a std Oval Manifold gasket such as A14/A15. Much more than 1-2mm.

Posted on: 2008/6/18 12:16
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Fandatstick
Re: A14 bored out to a 2Lt?
#135
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Asuming max practical bore = 80mm, 2L would require 99mm Stroke (A15 = 82mm).

I'm just a little sceptical but maybe with a custom crank, short rods and not too many rpm.

Posted on: 2008/6/18 12:05
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Fandatstick
Re: twin sidedraught questions
#136
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One of my old engines is a 1300 running a 32/70 cam, GX head, 11:1 C/R, pump gas and twin DHLA 40s.

Carb set up on rolling road:
Chokes 31mm
Mains 125
Air Correctors 170
Emulsion Tubes 7772.5
Pump jets 33
Idle/slow running jets 50

Smooth, tractable fast road engine with power band 4000-7500 rpm.

Posted on: 2008/6/16 11:22
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Fandatstick
Re: What breaks in a 56A gearbox??
#137
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Quote:

sikyne wrote:
When these gearboxes break, what usually lets go?

Std/mild engine - nothing/not much.

Torquey/Modified engine - stripped gears - treat with care.

The later 120Y/Sunny version (1" clutch cable hole) is stronger than early 1200 version. Its gears are a bit wider and bearing set-up differs.

Posted on: 2008/6/15 13:09
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Fandatstick
Re: cut tail shaft
#138
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It really should be cut in a lathe. Very important that the Universals are perfectly re-aligned when welding back together too. Must run perfectly true when welded.

You don't want a driveshaft breaking or whipping around bearing in mind the speed they can end up spinning at.

I'm a reasonable welder yet I'd be going to a machine shop to get the job done including rebalancing. Mine didn't cost too much.

Posted on: 2008/6/12 11:36
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Fandatstick
Re: ESCORT GEARBOX
#139
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I think I read some time back in a thread that member Tim Sillay had a racecar with an escy 'box many moons ago. I'd say it would be a good mod much stronger than A series box, better ratios etc although heavier due to cast iron construct.

Posted on: 2008/6/9 9:27
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Fandatstick
Re: Fuel types, what works and what doesnt.
#140
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I ran my 11:1 road car engine for years on 96 with no issues. Cam timing does come into it too though (wilder cams can tolerate higher calculated compression ratio). I wouldn't be running much higher than this on pump gas though.

Modern engines are able to stand lower octane vs high compression due to electronic timing trickery.

Posted on: 2008/5/23 11:12
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