Tweety's ea81 build

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Bantum
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Stand up ...

Post by Bantum » Sat Jan 31, 2015 11:14 am

+1 for a job well done ... !

Does Tweety have a alarm system ?

If so, you could add a few motion detectors & couple them with a VFL siren ( piezo siren ) + pre recorded message like "Stand Back MF" in best James Cagney voice ... ;)

Cheers, Bantum ...

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Tweety
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Post by Tweety » Sun Feb 01, 2015 7:40 pm

Good idea bantum.

So economy is steady between 10.1 and 10.9 l/100 kms . Achieving 28mpg towing is amazing.. means nearly 500 kms range, 50 ltr tank. Never got near that with the Vw 1916cc engine not towing. What is good is up steep hills down to 80kph can kickdown or back off throttle and engine just maintains speed much more often than it used to moSt impressed
[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 Feb 04, 2015 8:32 pm

That's an awesome fuel economy statistic - hopefully it keeps up for you in the long term after the engine is fully worn in!

Are the four (or five including Sylvester!) of you home yet or have you just kept going with these cheap fuel prices?

I'm happy to house sit (as you've got a decent shed :p)!

Happy times mate!

Cheers

Bennie
"The lounge room is not a workshop..."
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Tweety
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Post by Tweety » Wed Feb 04, 2015 8:36 pm

We arrived home this afternoon. Longest leg, Orbost to Strathbogie via Omeo.

Also the worst economy at 11.1 L/100kms and no wonder, from Bruthen to Omeo were long uphill slopes. The VW auto doesnt cope with these well although much better than pre reconditioned engine. eg. Now the trike will slow to say 70kph and often hold it there, previously kickdown necessary. Also 98RON gives more power and economy. So fuel consumption ranged from 10.3 to 11.1 L/100 kms. 25-28mpg. All up weight was around 1000kgms not far off the Brumby unladened and with one extra wheel as I towed the camper. Wind resistance on Tweety would be greater than most cars I believe.

Must now do the tappets all were set at 16 thou for run in. Will set to stock 10/14. in/exh. will have to wait for the dyno tune. Weber performance who sold me the 38/38 carbie are keen to do that. So rejetting could bring some nice surprises in output. Stay tuned.

I'm very happy with the economy. Most pleased with the easy cold idle, never stalls, zero oil consumption/leaks...that new motor feel.
[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 Feb 04, 2015 8:49 pm

Well that answers that!

Still good economy through those hills for an auto! Got an oil cooler on that sucker? Might be worth the effort!

Cheers

Bennie
"The lounge room is not a workshop..."
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Tweety
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Post by Tweety » Wed Feb 04, 2015 9:29 pm

Oil cooler for the tyranny? No, not worth the effort.

The tranny came in the Type 3 VW fasty, square back and sedan (notchback) and in my case with slightly lower final drive the same tranny came in the kombi. (final drive is 3.9 instead of 3.67:1

So, it pushed kombi weighing ? 2000 kgms plus load ? say 1000kgms = 3 tons. 3 times Tweety plus camper.

Some pics coming here soon.
[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 » Wed Feb 04, 2015 9:34 pm

Tony has shed. :cool:

Image

Image

Image

Image
[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 » Fri Feb 06, 2015 11:36 pm

I love the pic of the front wheel looking out over Mt Buffalo way ;)

Cheers

Bennie
"The lounge room is not a workshop..."
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Tweety
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Post by Tweety » Tue Feb 24, 2015 4:42 pm

Thanks Bennie. Yeh, nice lookout at Daniels lookout (think its called that)

Interesting today. Did the tappets. All werent much off stock gaps 10 and 14 thou. My Platinum plugs (new when engine was new) were set at 32 thou. Adjusted them to 38 thou. Went for a run...mmm lots more pick up and revved out quicker and smoother to 4500 rpm.

Then checked the timing and was 6 deg BTDC. Suppose to be 8 ,10 or even 12. Wondered why. Seems that the angle I put the light on the pulley didnt show the true mark well. painted the mark white and rest of pulley black so its clear. Gave it 11-12 degrees. Readjusted mixtures screws. Test run. now seriously, it shouldn't be a guide to power output but sometimes it happens without knowing it will happen. From rest full throttle and front wheel lifts off ground about 6 inches.
Hasnt done that since supercharged engine. Totally under control and a thrill. An ea81 on song pushing only 650 kgms can be fun. Any higher though and upon ground contact can damage the steering neck.

Still waiting for funds to get that dyno. (psst, wife wants a swimming pool. Thats not where the cost is...its the fencing/permits etc.:evil: etc etc)
[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 Feb 24, 2015 9:12 pm

hmmm....might have to try advance my timing a bit more - like my EA82 running 22 BTDC @800rpm....see if I can lift front wheels off the ground :evil:

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Tweety
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Post by Tweety » Tue Feb 24, 2015 10:06 pm

What...22 degrees. Crikey. Piston burning stuff. LOL
[SIGPIC][/SIGPIC]Tweety trike- EA81 (full reco 2014) 32/36 weber, SPFI manifold, 9.5:1 CR, VW auto.

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Subydoug
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Post by Subydoug » Tue Feb 24, 2015 11:31 pm

that sounds awesome tweety, good way to save wheel bearings ay ;).

Jonno, this one's for you,

attachment.php?attachmentid=4548&stc=1&d=1424784448

Regards

Doug
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steptoe
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Post by steptoe » Wed Feb 25, 2015 7:17 am

besides tiny, what is it Dougy ? I see rpm scale and 25 igoing up in fives up the side and what look like comp ratios or advance degrees in the chart ...
I think Willy said something not for this family forum when I said i ran 22 :p

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Tweety
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Post by Tweety » Wed Feb 25, 2015 10:36 am

Spark advance chart Jonno. Gee...dont you see that?

So what's it for Doug?
[SIGPIC][/SIGPIC]Tweety trike- EA81 (full reco 2014) 32/36 weber, SPFI manifold, 9.5:1 CR, VW auto.

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Subydoug
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Post by Subydoug » Wed Feb 25, 2015 2:56 pm

Jonno said he was running 22deg static ( I assume lpg). I thought he would get a laugh from my whimpy ignition timing. WOT only a couple degrees over jonno's idle! And it pings at 2k!

Doug

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steptoe
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Post by steptoe » Wed Feb 25, 2015 9:37 pm

aha, baby screen did not help me on that one. yep, lpg and 22 degrees and not heard a ping. This is the twin port too so she breathes a bit better :p

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El_Freddo
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Post by El_Freddo » Wed Mar 04, 2015 10:14 pm

Tweety wrote:Interesting today. Did the tappets. All werent much off stock gaps 10 and 14 thou. My Platinum plugs (new when engine was new) were set at 32 thou. Adjusted them to 38 thou. Went for a run...mmm lots more pick up and revved out quicker and smoother to 4500 rpm.

Then checked the timing and was 6 deg BTDC. Suppose to be 8 ,10 or even 12. Wondered why. Seems that the angle I put the light on the pulley didnt show the true mark well. painted the mark white and rest of pulley black so its clear. Gave it 11-12 degrees. Readjusted mixtures screws. Test run. now seriously, it shouldn't be a guide to power output but sometimes it happens without knowing it will happen. From rest full throttle and front wheel lifts off ground about 6 inches.
Hasnt done that since supercharged engine. Totally under control and a thrill. An ea81 on song pushing only 650 kgms can be fun. Any higher though and upon ground contact can damage the steering neck.
That's awesome mate! Can't wait to see the results after the dyno tune!

I seriously hope this is the setup you'll run hassle free for many moons to come! Stoked for you so far!

Cheers mate

Bennie
"The lounge room is not a workshop..."
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Tweety
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Post by Tweety » Sat Mar 21, 2015 8:38 pm

Today I did an economy test. First chance riding the trike without towing the camper. Melbourne and return. Total 446 kms fuel = 42.6 litres. = 9.55 L/100 kms or 30 mpg

I'm stoked about this. Speed was 105-110 kph constant to Berwick other side of Melbourne. Used 95 RON. Have been using 98 but 95 runs a little smoother and 98 showed no improvement over 95 in any way.

Spark plug gap had been raised from 32 thou to 38 thou with a little improvement in acceleration and response. Dont know if I should make it larger say 43 thou as recommended in some threads on USMB. Timing has gradually been raised from 8 degrees BTC to now 12 degrees and think it is right on now. maybe even a little too far might back it off to 10. As you guys know it runs rich. With these adjustments the symptoms of richness has deminished a little.

Can honestly say that the smoothness of this motor now is amazing. Balancing must be worth the cost. Certainly the larger manifold and larger carb 38/38 experiment has been successful and that makes me pleased.
[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 Mar 21, 2015 9:57 pm

Nice mate... Now I want to drop a pot load of money into Redback :p

Stoked you're getting those fuel economy returns. Much difference to towing? And have you got a dyno day booked in yet?

Cheers

Bennie
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steptoe
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Post by steptoe » Sun Mar 22, 2015 7:46 am

compared to the supercharged version running...what was it ? broken rings, crap compression etc - how do you rate your rebuild for power delivery and drive a bility ?The fuel consumption may improve when you get the rich bit sorted. I hope you have relayed the joy back to the engine builder ....

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