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Space Docker
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 Post subject: Re: oldfart55's '08
PostPosted: Tue Mar 07, 2017 7:57 am 
Love it!

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Shot Caller
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 Post subject: Re: oldfart55's '08
PostPosted: Wed Mar 08, 2017 12:43 pm 
JRolla wrote:
I saw this in Alaska last week :mrgreen:

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:banger: infamous all over the globe :banger:

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Space Docker
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 Post subject: Re: oldfart55's '08
PostPosted: Wed Mar 08, 2017 4:50 pm 
Finally got a chance to do some meaningful testing with the pz20. 68 degrees and 20mph wind. Still too windy to do one-to-one comparisons with my old numbers, but after all these years, I think I can make a fairly good seat-of-the-pants judgement.

When I pulled out of the garage, I fully expected to ride a block or two, then come back and make some adjustments. Apparently I was pretty lucky with my initial setup. Other than a quick stop to adjust the a/f screw, it ran great, so I just kept going.

Started out with 38/82, needle on 2nd-richest clip, a/f 2 turns out, and my short little v-stack intake. No bogging, no hesitation, no sputtering or backfire, it just GOES! Think I may need to go up a size on the main, it felt like it wanted a little more, but definitely no lean bog.

Like I said, I don't have exact numbers, but the butt-dyno reports a power increase. Noticed myself at one time doing 43 against the wind up a slight incline, and hit 47 several times with the wind. I was out right after the moms picked the kids up at school, so I had to abort almost every high-speed run. I did see 51 at one time.

Still need to do some tuning, but under the circumstances I was pretty pleased. Seems to be potential to out-perform the stock carb. Of course I still don't know how finicky it will be to temp. changes and such, but for now at least, I'm leaving it on there.

I had noticed that the idle speed screw didn't fit very tight, and sure enough it kept vibrating out of place. I got to the bottom of a big hill and it died. Reached down to adjust the knob, and it was gone! Puttered up and down that hill 5 or 6 times hoping to find it, when it finally occurred to me, Hey, maybe it's on top of the motor! Sho nuff, the knob and spring were laying right there! Gotta put some gooey on that.

Anyhow, that's my first real experience with the pz20, and I gotta say, I was pleasantly surprised. I was EXPECTING a bog at takeoff, and it just didn't happen. :meh: :banger:

PS: BIG thanks to the TRBRO who sent me this stuff to play with. Like most philanthropists, I believe he prefers to remain anonymous. If not, I'll give you a big public THANKS! :highfive:

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Donkey Puncher
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 Post subject: Re: oldfart55's '08
PostPosted: Wed Mar 08, 2017 5:15 pm 
Awesome review! :banger:

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Space Docker
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 Post subject: Re: oldfart55's '08
PostPosted: Wed Mar 08, 2017 8:09 pm 
Version2.0 wrote:
Awesome review! :banger:

Thanks V2! I had rigged up a temporary throttle cable adaptor, because I'm lazy and didn't want to route a new cable until I was sure I was keeping the carb. I was checking it out after my ride to see if it had slipped any, and realized I wasn't even quite hitting full throttle! That will be fixed tomorrow. Temps in the 70s, but so is the chance of rain. If I don't get to ride, I'll at least get my cable finalized.

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Sith Slayer
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 Post subject: Re: oldfart55's '08
PostPosted: Thu Mar 09, 2017 4:53 am 
OF
if you snap the throttle you have zero bog?

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Space Docker
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 Post subject: Re: oldfart55's '08
PostPosted: Thu Mar 09, 2017 10:35 am 
Jedi wrote:
OF
if you snap the throttle you have zero bog?

Yep, strange but true. After all I'd read, I was expecting a lean bog at takeoff, but it didn't happen. From an idle, I can just take off like normal and there's no hesitation. And if I drop down to like half-throttle and then back to WOT, it doesn't stumble at all. :meh:

The carb came with two manifolds, don't know the brands. The one I used is longer and the ID matches the carb and head much better than the shorter one. Just took a slight bit of dremel to match them right up. It has two grooves cut in the OD, which makes it look like it's 3-piece, but it's actually solid. If that tells you anything. I think my superfantabulous, unique, custom, hand-built, all-original, one-of-a-kind, prototype intake may have something to do with it, but I don't want to brag. :mrgreen:

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Needs Training Wheels
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 Post subject: Re: oldfart55's '08
PostPosted: Thu Mar 09, 2017 11:28 pm 
I get zero bog with my set up as well. Before up jetting your main, try upjetting your SJ first to a 40. I'm currently running SJ 40 / MJ 82 and I'm hitting 58 mph with that set up. I had a slight lean bog at first but a slight adjustment on the AF screw and upjetting my SJ helped clear that up.


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Space Docker
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 Post subject: Re: oldfart55's '08
PostPosted: Fri Mar 10, 2017 10:32 am 
1JZSupra wrote:
I get zero bog with my set up as well. Before up jetting your main, try upjetting your SJ first to a 40. I'm currently running SJ 40 / MJ 82 and I'm hitting 58 mph with that set up. I had a slight lean bog at first but a slight adjustment on the AF screw and upjetting my SJ helped clear that up.

OK, Thanks!

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Shot Caller
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 Post subject: Re: oldfart55's '08
PostPosted: Fri Mar 10, 2017 10:53 am 
that is a hell of a carb!

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Space Docker
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 Post subject: Re: oldfart55's '08
PostPosted: Fri Mar 10, 2017 2:43 pm 
Got the cable all adjusted and put some gooey on the idle speed knob so hopefully it will stay in place. Went for a short ride, so far so good.

Today is 20 degrees cooler, but went out for a while anyway to see if the temp. seemed to make a difference (nope).

I know Jedi is all :dubious: and :ucrazy: about no bog on takeoff :mrgreen: . I found out that if I REALLY try, I can make it bog, but I have to snap it like I'm trying to win a World's Fastest Wrist Contest* or something, like my goal is to break the cable. I don't normally take off like that anyway, just a smooth twist, (estimated .5 seconds from idle to WOT, +/- .05 :lol: ).

My idle speed fluctuates less than it did with the stock carb. :meh:







I actually did place 7th in a similar contest years ago, but that's a whole 'nuther story.

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One of Us
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 Post subject: Re: oldfart55's '08
PostPosted: Fri Mar 10, 2017 2:46 pm 
Good stuff. Sounds like this thing has some potential.

I couldn't be more curious about how this works out for you. I've thought that the 20mm carb would make more power. Everything I've read/heard seems to say they don't work so good or are super finicky.

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Needs Training Wheels
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 Post subject: Re: oldfart55's '08
PostPosted: Fri Mar 10, 2017 3:18 pm 
Did you trying upping the SJ yet?


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Dirty Sanchez
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 Post subject: Re: oldfart55's '08
PostPosted: Fri Mar 10, 2017 6:27 pm 
dpmpt1 wrote:
Guess who just got quoted in my signature......... :highfive:

I just now saw this!!
Woo! Thanks!

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Space Docker
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 Post subject: Re: oldfart55's '08
PostPosted: Sat Mar 11, 2017 8:01 am 
1JZSupra wrote:
Did you trying upping the SJ yet?

Haven't done anything else, it turned cold and rainy again. :headbashing:

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