JET-A-VATOR Experiment

vamram · Posted: Thu Apr 16, 2015 10:16 am Post subject:

Frank, damn, that's amazing mileage in that Miami traffic. Last time I checked compression was about a year ago and came in at 120-125 all around. And I don't burn oil - QS Defy 5w/30 - at least not enough to affect the level. I haven't had to add oil in at least a month and I check it at least 1x/week. What do you gap your plugs to and what type of plugs do you use?

Thanks for the carb adjust link. I think that's pretty close to how i've done it, more along your instructions than the ones Marv posted. Plus what Doug suggested a few posts back.

Doug - I haven't had a noticeable drop in performance, no dogging, no bogging. But I think you're right that the extra fuel is running out of the tailpipe.

I didn't check the plugs as part of yesterday's update, I'll pull one tonight.
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'74 Super 9/16 - present, in refurb process.
'73 Super - 6/18 - Present - Daily Driver!
'75 Super Le Grande...waiting it's turn in line behind '74.
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vamram · Posted: Thu Apr 16, 2015 12:37 pm Post subject:

Hey Doug - what size is that pilot jet that just arrived? No stamp on it. I'm guessing bigger then 55.
Thanks!

Victor
_________________
Eventually, "we are what we pretend to be.’”
Give peace a chance - Stop Russian-Soviet Aggression!!

'74 Super 9/16 - present, in refurb process.
'73 Super - 6/18 - Present - Daily Driver!
'75 Super Le Grande...waiting it's turn in line behind '74.
Click to view image
Save the Supers!!

Doug Berg · Posted: Thu Apr 16, 2015 1:32 pm Post subject:

Supposed to be a 60,,, I have a crazy idea!!! Let's see if your willing to,,,"take a walk on the wild side"!!! Maybe go in the opposite direction here,,, (do it the other way around) Richen up the engine while the throttle plate is closed & lean it out @ cruise!!! By unhooking the retard hose @ the distributor & plugging it w/ a golf tee,,, small screw,,,??? An 009 is 10 btdc @ idle & 32 total advance,,, see if yours will do this w/ retard disconnected!!! If the idle timing is higher you'll have to adj... "bypass" to desired idle speed!!! See if you can set total advance to 34 degree's and still be BTDC @ idle (no more than 15@ idle) Hopefully start the cylinder from a richer mix & end in a leaner mix!!! which it just showed it favor's!!! Doug...

Marv [UK] · Posted: Thu Apr 16, 2015 1:53 pm Post subject:

vamram · Posted: Thu Apr 16, 2015 5:24 pm Post subject:

Frank Bassman · Posted: Thu Apr 16, 2015 5:41 pm Post subject:

Hopefully that gives some good results.

Vam, I use NGK BR6HS. They have a "protruded" tip. I really like them a lot. They're also very cheap. Normally the BP5HS ones would be the way to go, or BP6HS works too. The BR6HS are resistor plugs and I really didn't want the resistor plugs, but they were all Autozone could get for me. They work great nonetheless.

Try them, you can't go wrong with em.

By the way, what plugs are those you're using?

vamram · Posted: Thu Apr 16, 2015 5:55 pm Post subject:

I'm currently using Champion L87Y, they have the protruded tip as well.
_________________
Eventually, "we are what we pretend to be.’”
Give peace a chance - Stop Russian-Soviet Aggression!!

'74 Super 9/16 - present, in refurb process.
'73 Super - 6/18 - Present - Daily Driver!
'75 Super Le Grande...waiting it's turn in line behind '74.
Click to view image
Save the Supers!!

Doug Berg · Posted: Thu Apr 16, 2015 7:29 pm Post subject:

I would actually leave the retard hose disconnected (& plugged) for the entire test,,, If it's @ 8 btdc @ idle without the retard hose that's perfect!!! that's what will make the cylinder richer @ the start (on take off) Maybe closer to 34 total timing!!! (might make it closer to 5 degree's @ idle) With the 60 idle I'd set the volume screw @ the RPM drop (tight to the lean side) Doug...

vamram · Posted: Thu Apr 16, 2015 7:41 pm Post subject:

Doug Berg · Posted: Thu Apr 16, 2015 7:45 pm Post subject:

When I say 34 - 35 total timing,,, I'm meaning w/ the advance hose connected & retard hose disconnected,,, Then hopefully it'll be near 8 btdc @ idle!!! I set the timing #'s as the engine see's it during operation!!! (could be closer to 10 -15 btdc @ idle w/ advance hose connected & retard hose disconnected) Doug...

Doug Berg · Posted: Thu Apr 16, 2015 7:47 pm Post subject:

If your using the 60 idle I'd set it like you did before I had you open it that 1/2 turn.... Doug...

vamram · Posted: Thu Apr 16, 2015 7:58 pm Post subject:

Ok, i'll pull over on my way to work once the Buggy's warmed up and adjust it.

Victor
_________________
Eventually, "we are what we pretend to be.’”
Give peace a chance - Stop Russian-Soviet Aggression!!

'74 Super 9/16 - present, in refurb process.
'73 Super - 6/18 - Present - Daily Driver!
'75 Super Le Grande...waiting it's turn in line behind '74.
Click to view image
Save the Supers!!

Porsche60 · Posted: Thu Apr 16, 2015 9:30 pm Post subject:

fastfil · Posted: Fri Apr 17, 2015 2:16 am Post subject:

Kawasaki have been following this thread....

Image may have been reduced in size. Click image to view fullscreen.

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"...swingaxle...transaxle...same diff."

vamram · Posted: Fri Apr 17, 2015 6:29 am Post subject:

vamram · Posted: Sun Apr 19, 2015 2:13 pm Post subject: MPF UPDATE

24.97 MPG.

I just advanced the timing 2* at idle and adjusted the carb.
_________________
Eventually, "we are what we pretend to be.’”
Give peace a chance - Stop Russian-Soviet Aggression!!

'74 Super 9/16 - present, in refurb process.
'73 Super - 6/18 - Present - Daily Driver!
'75 Super Le Grande...waiting it's turn in line behind '74.
Click to view image
Save the Supers!!

Doug Berg · Posted: Sun Apr 19, 2015 6:53 pm Post subject:

I think that's gonna increase the total + 2 also,,, I was hoping I could get you to set the timing w/ the retard hose disconnected (and plugged) & the advance hose connected,,, to 34 degree's total timing,,, and check the timing @ idle to make sure it's not high 10 -12 would be perfect!!! up to 14 is ok just don't wanna be way past 15 degree's @ idle... Trying to get the engine to work w/ the zoom tube The advance being higher @ idle should make the engine "think" the exhaust is smaller on take off,,, w/ less total timing it will "think" it's larger (in comparison to where the total timing was before) "Thinking" it's a progressively growing exhaust!!! Just need to see if the engine agree's !!! Doug... (and to leave the retard hose disconnected & plugged for 1 mileage test!!!)

vamram · Posted: Sun Apr 19, 2015 7:55 pm Post subject:

Doug Berg · Posted: Sun Apr 19, 2015 8:36 pm Post subject:

Awesome!!! I don't know if one of your other carb's has one of those cool rubber cap's (to remove the retard hose) If not,,, you need to fasten the hose down to keep it out of the fan or fan belt!!! If the hose is long enough,,, you can unfasten one of the air cleaner clips,,, slide the hose behind the clip & refasten it on the air cleaner!!! to keep the hose locked down & out of the way,,, Doug...

Doug Berg · Posted: Mon Apr 20, 2015 10:53 am Post subject:

After looking back @ your timing #'s w/ both hoses disconnected,,, (8 @ idle & 32 total) with + 2 degree's it would be 10 idle 34 total which is perfect,,, This is what I'm aiming for!!! (It could be that it needs both hoses disconnected) to achieve the desired #'s @ idle & total!!! Trying to have the engine see the distributor as if it were an 009 !!! Many ways to skin a cat,,, just gotta see which way will give the desired #'s!!! I think after you drive it this way,,, you'll will notice a difference in performance.... just not positive on where the mileage will go!!! (It might go down,,, cause it will be more of a "little hotrod") (a lot stronger down low) "more zippy" Doug...


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