Can you see whats wrong here?

[tlwjkw]

If you can see it do you think tha motor will run?

[tlwjkw]

Something else I've never seen before......

[wideglide55]

Just looks like a little carbon buildup,just run some Quickleen through it and it will be fine.

[sschefer]

Something else I've never seen before......

Did that ring catch the exhaust port? Did something go through that wasn't supposed to? Was it a air pocket in the casting that finally let loose when she leaned out.

Inquiring minds want to know:cheers:

[wrechin2]

Had a omc x-flow do that. Melted only one side and melted a hole all the way through it.

[tlwjkw]

Keep clickin' on tha pictures and they will get bigger. On tha piston it looks like tha hole was there first :confused: Just never saw a nice little round hole like that.

What about tha first ones? Can ya see it?.......

[wrechin2]

Just seen what you were looking at!!!!!! But that would have actually caused it to go rich 2 ways..

1) The fuel not having anywhere to go would have stayed pooled behind the reed. This would normally cause a stumble as the excess fuel would be pulled in behind the reed.

2) The old trick some people done, was to remove the hose. They way the reglator works is when vaccume is applied it will lower fuel pressure by a few psi. When the throttle plate open and the vaccume drops, this will cause the fuel pressure to increase. By removing the hose would cause the fuel pressure to stay at max psi all the time. With the injector pulse width being the same and more pressure available, it would have injected more fuel due to more psi which would be rich. It does not have a feedback system like a car with a adaptive numerator so it can not adjust the mixture. It is what it is. Hope this helps....

[TEXAS20225]

Was this a new rebuild job ?Or lets say a rebuild that lasted no time And they Used Seeeeeze_cos:D

[TEXAS20225]

how did the regulator work and what happened to the fuel that was supposed to be returned to the vapor canister:confused:

[tlwjkw]

I understand all that but it has a vacume port connected to vst overflow. So my way of thinkin' ya got fuel goin' somewhere it ain't supposed ta be goin'. Since I don't know tha route of tha vacume in tha plenum I'm wonderin' where tha fuel goes cause being a vacume I would think it could pull fuel outta tha vst :confused: But what tha he.. I'm a carb dinosaur anyway. Enlighten me............

Typin' at tha same time Bobby,
Yes and guess it just stayed in front of tha reed :confused:

[wrechin2]

Regulator was not working and fuel stayed at max

Fuel was dormant... Went no where.

[wrechin2]

I understand all that but it has a vacume port connected to vst overflow. So my way of thinkin' ya got fuel goin' somewhere it ain't supposed ta be goin'. Since I don't know tha route of tha vacume in tha plenum I'm wonderin' where tha fuel goes cause being a vacume I would think it could pull fuel outta tha vst :confused: But what tha he.. I'm a carb dinosaur anyway. Enlighten me............

the way the vst drain is set up, it can not pull fuel out, only vapors. It trickles in the top of the tank and just flows down. it has a large shield in it also. Hope this helps

[tlwjkw]

So your sayin' tha vst overflow is for VAPOR only and fuel cannot get out that way?

[sschefer]

I have no clue about the FI but I will sometime down the road if I get my wish.

As for the piston. My guess is that it got hot, swoll up, caught a ring, busted that chunk off and exposed the hole. Probably an air pocket from pour casting.

Just a guess.

Steve

[wrechin2]

When the bleeders push fuel into the VST tank it has just a nipple thad drips in into the tank that is shieled by a metal plate (see the red line). If vaccume is applied to it, it will only suck vapors, not liquid fuel. There is not a tube going into fuel, so it will only pull vapors out. There is one that is suppose to be hooked up that way to pull vapors out of the tank, you simply have 2 doing it. If you look at what is labeled "P" you will see it. The diagram shows it low for clarity, but is just the lower one on the 2 fittings. Hope this helps

The way it is set up, it will run. It would have 36 psi of fuel pressure all the time, fuel pooling up behind the reeds, causing a stumble(more than likely due this is common with stopped up valve which is the same as flow being blocked) just off idle due to the addtional fuel being present and not able to remove it, and when running normal down the water it would running a little rich due to high fuel pressure (and pulsewidth being the same) and possible the addition of what little fuel that the 2nd tube removing vapors would add. All of these would cause rich conditions. The piston shows lean (stopped up injector) or detonation (switch box,timing incorrect, poor fuel, incorrect octane, ect) to melt the hole in it. If was just damaged, it may be lack of oil or clearance issue. For the piston to physically melt, that takes heat. Which it shows multiple places where the aluminium is distorted. But that is JMO......

[tlwjkw]

Is all that just "theroy" or have you actually ran a motor this way?
Yeah, tha thing had a lot of problems ta be just rebuilt. Just never seen such a neat little hole in tha SIDE like that. Guess he turned it off right before it came apart (piston).

[T-REX]

Damm Tommy, I have 2fo pissons wit 3 big holes, an they run purdy good!!!:D:D

I kan see tha hole, which I never seen one zakkly like dat, but tha other pics are too dark fer me ta actually see what iz what...

Tha only reel problem I see iz tha carbs ain't jett'd rite!!!:eek::D

[tlwjkw]

Tha only reel problem I see iz tha carbs ain't jett'd rite!!!:eek::D

Ain't dat da truth..................:iagree: but I can fix that problem :thumbsup:

Other pics just some screwed up plumbing ta tha vst n reg...........

[tlwjkw]

Damm Tommy, I have 2fo pissons wit 3 big holes, an they run purdy good!!!:D:D

Ya got six extras? Being tha old lazy ass I am I might be able ta find a spot for 'em............

[wrechin2]

That is not theory, that is fact.... They way that is hooked up it will run fat. BTW, I would never run a engine that way, I know better.......

If you put .096's on a stock engine what will the add fuel do? Run rich. Think about how the bleeder system work and why it is there. To remove excess fuel. If it in not being removed it goes in the engine and basicly floods the engine. They are the 1st thing you should check if you have a stumble just off idle. The injectors are going to pulse the same no matter what, with more pressure, it allows more fuel to pass. That is what the regulator does, acts similare to a accelerator pump by boosting pressure when vaccume drops. Sorry, it tried to help........

[tlwjkw]

No need ta get all bunched up. I didn't hear or see this thing run. So I haven't a clue as ta what it was doin' or how it acted. I just as a ? I don't need a lecture on lean and fat or what these things are supposed ta do. What i don't know is tha inner workings of tha vst. Anyway, if ya got both feet on tha floor tha tha bleed and pressure (long as its good) don't make any difference......

[T-REX]

Tommy, I gotz qite a few 2fo pissonz...whatta ya need...???

[tlwjkw]

Thanks Rex, but I think we got enough stuff rounded up for now (givin' Vertex a shot). Ain't 'fraid of used stuff most a tha time on tha 2 fo. Puttin' together a 'ole ragity BP with a suspect hole just cause I wanna use a cherry XR4 clam shell. If it stays ta gether might need some better stuff. Mostly pistons that already been rubbed on. To lazy (eyes ain't what they used ta be mostly) ta D port an drill tha boost so if ya got 3 each we might can do some tradin' or sumtin'. Gonna use a 2 liter Formula 7 petal carb (thank ya very much 6, and yeah, I figured out tha bleed lines) front and reed plate wit tha 20's. No hurry I THINK I have 'nough time left :D...............

Oh yeah... I like tha "short" boats too. Even if they do act stupid sumtimes. Lets us know our tickers are still workin'. :cheers:

Later..............t

[T-REX]

I juss mite have a set ov pissonz already "D" ported and 1/2" FP holes....They ain't top pinn'd, but are cut for BP and even got tha lil cool'in holes in them ta cool tha bridge...I do have a set ov top pinn'd pissons I got From Mendo, but I'z kinna a selfish ole basserd, an gunna keep them ta build tha BP I have:D

Ya need all std???...Port and Stb???......I thank they iz ART pissonz, but wouldn't put my life on it!!:rolleyes:

[tlwjkw]

Gonna try tha vertex till we get a little time on it in tha next couple a weeks. If it don't come unravalled and tha suspect hole stands up ta 8 ta 9 grand spurts I might wanna put some D ports and more compression on it. Got a few uppitty cookie cutter BIG motored bass boats round here. But yeah they will be standard and all six. Guess I been lucky with tha 2 fo n 2.0 with tha side pin. Ain't never shook one of 'em out yet so that don't bother me. I'll let ya know how it plays out and I appreciate tha offer. Hell all this stuff might be on Ebay after I step on it tha first time :confused:

If ya got 'em lemme know tha $ n I'll see if I can shake tha dust n moths outta my billfold :o...............t