EA81 into trike VW automatic

For those that have a 2 wheel affliction, share away here !
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Tweety
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Post by Tweety » Sat Nov 05, 2011 9:43 am

Think you are right Steptoe. read on

The leather of the gloves seem like a part of your skin as you slide your fingers through them. But this is all automatic, all the minor actions as you prepare yourself for some fun. For your attention is frozen on a yellow three wheeled wonder called a trike. Big deal some might say. For me “tweety” is a big deal.

But what others think and say makes no impact as you finish waving that fleecy lined cloth over the chrome of the twin headlight peaking above the girder forks. You had the dream all night but now its reality, its happening as you slide your butt onto the seat. You feel just millimetres from the ground but the custom roof is actually higher than common cars.
You give the throttle a squirt and that Subie 81 engine fires into life, rumbling, a soothing jiggle down to your nuts….oh yeh!. The jiggle turns into a throb from that twin 'erect' exhaust each of the four tail pipes emitting its own throbbing gurgle but in unison. Thoughts go to Bennie- mmm think he’d have body parts hard at this point!

You allow it to settle to a nice idle then finally your wife has arrived and you both ride off. The Subie flatty sounds a bit loud as the trike weaves to towards the windy tarred road at a hamlet called Boho ahead then a burst of throttle and we are away. The higher the revs the quieter that engine becomes. Knowing the trike is highly unlikely to ever roll, with all that weight down low, you set about flaunting with the bends….oh wow! . You approach a bend that you know is uphill as it straightens and has an advisory sign of 25 kph….you take it at 50 then at the apex you pull that throttle hard on and the kickdown to second is instant that causes the front wheel to want to lift…..yeeehah!. You know if it does lift the trike will cease turning so its perfect…..the fact is that too much power and rear end weight on a VW trike needs more concentration for this reason, but the ea81 is just right- measured power, controllable response- spot on.

The trike remains in second and as you climb that hill about 300 metres long you reach 100kph and the engine howls at around 5000rpm with a delight you haven’t felt for decades. At the top of the crest the throttle is backed off and third is automatically selected but even though this little gem of a motor is only 1781 cc you get a small shove in the back leaping you forward a bit- oh nice.
You pull up in your garage. Its dark now and the green led lights above the engine shine on that motor reminding you of what you have. An engine not remarkable but adequate, reliable and simple. You take a moment to back off the timing 2 degrees to end that little pinging you got ascending that hill and grab that fleecy polishing cloth to place on the chromed headlights….then you back off- its done, its just what I wanted…and no need to polish anymore at this time.

Tweety thanks his forumites.

Tweety is happy. Tweety is resting….

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[SIGPIC][/SIGPIC]Tweety trike- EA81 (full reco 2014) 32/36 weber, SPFI manifold, 9.5:1 CR, VW auto.

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El_Freddo
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Post by El_Freddo » Sat Nov 05, 2011 9:32 pm

Tweety wrote:Err..... thanks for the cryptic puzzle bennie- taking advantage of my age eh? I do know WTF means and that's it!!
FTMFW = F The Mo F'king Win :D

Un-cryptice enough for you??

Yeah, I think someone else will be sitting in the shed just listening... best to leave a door open :twisted: I think the bug had bitten you too, and I'm not talking about the VW sort either.

So, I'm laughing at your comment you said to me as I left you joint about subi fumes in my blood, well I think you'd have to look in the mirror now and say the same thing!

Cheers

Bennie
"The lounge room is not a workshop..."
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Tweety
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Post by Tweety » Sat Nov 05, 2011 9:35 pm

yeh Bennie, its called Subiagra.....

and I got it baaaad.....
[SIGPIC][/SIGPIC]Tweety trike- EA81 (full reco 2014) 32/36 weber, SPFI manifold, 9.5:1 CR, VW auto.

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El_Freddo
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Post by El_Freddo » Mon Nov 07, 2011 1:17 pm

Tweety wrote:yeh Bennie, its called Subiagra.....

and I got it baaaad.....
Yep, it was only a matter of time after you got the EA81 :twisted:

You cannot resist!

And you've got some awesome riding weather coming up now or soonish :D I hope you've got the fuel card loaded!

Cheers

Bennie
"The lounge room is not a workshop..."
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Tweety
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Post by Tweety » Mon Nov 07, 2011 6:13 pm

yeh Bennie. postponed trip till early next week due to rain on Tues/Wed this week. Going beyong Corryong though.

Got a nice surprise. the engine was pinging uphill a fair bit. backed off timing 2 degrees. still did it. tried full tank of 98.

220kms from Wallan to city, cruise around then back up to Euroa. 20litres.

9.1 L/100kms = 30.7 mpg. I never achieved more than 27 mpg with the 1916 and that was without the roof.

very happy. and no pinging!
[SIGPIC][/SIGPIC]Tweety trike- EA81 (full reco 2014) 32/36 weber, SPFI manifold, 9.5:1 CR, VW auto.

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Tweety
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Post by Tweety » Tue Nov 15, 2011 6:24 pm

Two day trip finished. Towed the van up the Hume. Found it will reach 110kph resonably easy except when a hill arrives it is a little overgeared and falls back to say 85. This is ok BUT not ideal. I rode the trike the other day and found acceleration above 100kph on freeways a little slow. After thinking about it I realsied......

Say I bought a Leone 3 speed automatic EA81 with motor in good nick. It would likely have 175/60R13 tyres or similar. Grearing of the auto compared to the VW auto is so close there are identical especially the 1:1 top gear that is the subject here. Diff ratios are also similar at around 3.67:1.The Leone weighs about the same as the trike + van say 1100kgms. I would suggest the Leone has less wind resistance.

Now bung on 275/60/R15 tyres to the Leone. According to web tyre calculators thats a whopping 20% extra circumference. It would most likely behave exactly the same as the trike does now. Talll geared.

This would not be such an issue if I wasnt towing anything. But it is when we plan to tow a lot.

The trike came with smaller tyres- 295/50/R15. 5% less circumference than what is on there now.. I need new tyres soon. Cant go lower because in 295 width sizes arent common and ground clearance becomes an issue. so thats the way I'll go back to the 295 tyres a common size for V8 70's cars like the Ford GT. It'll raise the revs about 200 at cruising speed

Economy- non towing 22mpg VW, 29mpg Ea81

Towing- 19mpg VW 14 l/100kms, 23 mpg (12 L/100kms)

Apart from that there is another issue- cooling. The twin thermatic fans worked better than one only BUT air flow is not sufficient to sustain low enough temps. On steep hills it the temp will climb up and up to 100C where I stop and idle till it goes down to say 87 then take off again. I have a remedy. I've ordered a Kawasaki radiator 500mm wide and 135 high (RHS of two units). This will be mounted at the front lower fairing area and connected to the heater hoses, new ones Andy sent me a while ago and current blocked off. I'll have a leg warmer heater during the winter and make upa diverter for hot air in summer. that should keep it cool and keep us warmer.
[SIGPIC][/SIGPIC]Tweety trike- EA81 (full reco 2014) 32/36 weber, SPFI manifold, 9.5:1 CR, VW auto.

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steptoe
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Post by steptoe » Tue Nov 15, 2011 6:51 pm

Compromise ? And stop ya tinkering?

A nice little turbo would fix your woes :evil:

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Tweety
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Post by Tweety » Tue Nov 15, 2011 7:40 pm

quote "tinkering"

yeh steptoe...but its my hobby man!
[SIGPIC][/SIGPIC]Tweety trike- EA81 (full reco 2014) 32/36 weber, SPFI manifold, 9.5:1 CR, VW auto.

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El_Freddo
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Post by El_Freddo » Wed Nov 16, 2011 8:54 pm

Tweety wrote:I need new tyres soon. Cant go lower because in 295 width sizes arent common and ground clearance becomes an issue. so thats the way I'll go back to the 295 tyres a common size for V8 70's cars like the Ford GT. It'll raise the revs about 200 at cruising speed
Yeah I was going to say ditch those rims and get something that suits the drive train for your purpose - it's worked for me :twisted:

And maybe a little hair dryer hanging off the side of the EA81 might do the trick as Steptoe has suggested ;)

Cheers

Bennie
"The lounge room is not a workshop..."
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Tweety
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Post by Tweety » Sat Nov 19, 2011 8:37 pm

I fitted a small radiator to the front of the trike tonight. ran the 15mm hoses to the heater in/out points. No leaks. test ride tomorrow if not raining and get some pics.

I'd like two miniature thermo fans. the radiator height is 135mm so have to be pretty small say 120mm. off a motorcross bike I believe? should result in a nice little heater.
[SIGPIC][/SIGPIC]Tweety trike- EA81 (full reco 2014) 32/36 weber, SPFI manifold, 9.5:1 CR, VW auto.

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El_Freddo
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Post by El_Freddo » Sat Nov 19, 2011 9:18 pm

Tweety wrote:test ride tomorrow if not raining and get some pics.
It's Victoria! I've course it will rain when you don't want it to!! And it won't rain when you do want it to...

I hope it doesn't rain ;)

Cheers

Bennie
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Tweety
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Post by Tweety » Sun Nov 20, 2011 7:46 am

Image

Image

Image

isnt finished, a not quite horizontal, perspex trim to be put on and black engine paint. Also a alloy scoop prior to the radiator. Off to Yackandandah today then few days off. Testing and completing. Bot those heater hoses het hot! hot water straight off the head.
[SIGPIC][/SIGPIC]Tweety trike- EA81 (full reco 2014) 32/36 weber, SPFI manifold, 9.5:1 CR, VW auto.

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Tweety
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Post by Tweety » Sun Nov 20, 2011 5:46 pm

test run- great! temp hold at 79-80 degrees when moving, idle and the thermo fans take a little while longer to come on.
[SIGPIC][/SIGPIC]Tweety trike- EA81 (full reco 2014) 32/36 weber, SPFI manifold, 9.5:1 CR, VW auto.

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steptoe
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Post by steptoe » Mon Nov 21, 2011 7:34 am

how hot was the day ? that often matters

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Tweety
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Post by Tweety » Mon Nov 21, 2011 8:46 am

25 degrees steptoe. the airflow content just isnt there. thought of more scoops under the trike etc. could go to a whole lot of trouble whereas the front radiator did the trick and so easy to install....2 hours work. It gets real cold up here in the mountains in winter and we like to ride the trike even in those months. Any warm air from the front will be welcomed in the winter and an adjustable vane at the back of the radiator to direct the hot air would be an easy solution for the summer.
[SIGPIC][/SIGPIC]Tweety trike- EA81 (full reco 2014) 32/36 weber, SPFI manifold, 9.5:1 CR, VW auto.

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Tweety
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Post by Tweety » Mon Nov 21, 2011 6:01 pm

Towed the van today. Temp would not budge over 82 unless I slowed and stopped at an intersection. Then it sat on 84. Then in no time after I rode off down to 81 again. I'm happy now. 10 kms and the fans didnt come on at all. Weather was sunny and 28 degrees. Summer will be a test in traffic. if a problem then a 4" thermo fan might be needed. Cross that bridge when I come to it.

It nice to bend my knees and warm my legs. wind chill can be a pain in colder times.
[SIGPIC][/SIGPIC]Tweety trike- EA81 (full reco 2014) 32/36 weber, SPFI manifold, 9.5:1 CR, VW auto.

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Post by FROG » Mon Nov 21, 2011 6:20 pm

sounds much more promising Tony :D

and sorry I missed your call last week
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Post by El_Freddo » Mon Nov 21, 2011 7:57 pm

Tweety wrote:25 degrees steptoe. the airflow content just isnt there. thought of more scoops under the trike etc. could go to a whole lot of trouble whereas the front radiator did the trick and so easy to install....2 hours work. It gets real cold up here in the mountains in winter and we like to ride the trike even in those months. Any warm air from the front will be welcomed in the winter and an adjustable vane at the back of the radiator to direct the hot air would be an easy solution for the summer.
Tony, I reckon by simply adding more coolant volume to the system may have elevated the problem if it's not solved it, more coolant speed in the radiator as it moves through the cooling channels reduces the amount of time it's got to dissipate the heat.

By adding more coolant with this little radiator you've added to the overall volume of the system and you've also added more cooling area, not only through the small front radiator, but also via the heater hoses - while not as effective as a radiator they do get rid of some heat...

Cheers

Bennie
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Tweety
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Post by Tweety » Mon Nov 21, 2011 9:20 pm

I recall once I owned a Datsun 260C coupe similar size to a Toyota crown. 2.6 litre 6 cylinder auto. I towed a 20 foot twin axle Franklin heavy as hell van to Sydney and back to Melbourne. Overloaded it ran hot as hell. I put the heater on demister with fan and it sat on mid way. problem solved for the trip at least.

I think there is also a problem with my MR2 radiator in that it has the outlet pipe (to water pump) way up high, like the inlet pipe. This is because the MR2 I think has it mounted flat. I dont know if I took it off and got a radiator mob to relocate it low whether it would improve the cooling.

I personally feel the issue is with lack of air flow. That small radiator gets so much air forced through it, it is most effective.

Your ride is booked when you drop in Bennie.
[SIGPIC][/SIGPIC]Tweety trike- EA81 (full reco 2014) 32/36 weber, SPFI manifold, 9.5:1 CR, VW auto.

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steptoe
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Post by steptoe » Mon Nov 21, 2011 9:32 pm

MR2 as in the later version had the radiator angled slightly up front, about 20 degrees from memory

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