Re: Compression check results.
 

It's designed to pump at cranking otherwise the Detroit diesel
2-cycle engines would never start.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

DougW wrote:
>
> It wouldn't. The blower only comes on if there is demand, otherwise it
> bypasses internally. That and at cranking speed there isn't enough rpm
> anyway.

Re: Compression check results.
 

You got a blower on there?

Ok, I have no idea what that could do to the compression on cranking.
What does it rely on for 'demand'? It could be seeing high vacuum with
the throttle plate closed and be spinning up.

Meanwhile if you have no ping issues, then you have no issues.

Mike

DougW wrote:
>
> Mike Romain did pass the time by typing:
> > You 'can' have that much carbon in it.....
> >
> > You are the guy with the shitty wires and a miss?
>
> Just one shitty wire and that was on #6. Installed a new
> set of wires (thank you lifetime warantee) and it runs like
> a top. (slightly wobly, and ticks a bit, but like a top)
>
> > I have opened up more than a few and there can be a lot in there. I did
> > the head gasket on mine a while back and decarboned it before hand.
> > There were still a couple loose chunks of carbon in it because I didn't
> > road run it after the clean and these chunks were close to 1/8" thick,
> > more than 1/16" for sure. This engine only had 40K on it.
>
> Wow, that is a lot of carbon buildup! Don't think it's that bad or
> with my extra boost I'd be getting a lot of detonation. The plugs
> only had a very thin flaky layer of carbon on them. Still too much though.
>
> Probably O2 sensor again. Had this problem before with the sensor
> reading just a smidge off but still in spec. Wish there was an easy
> way to test those sensors apart from having a scope.
>
> --
> DougW

Re: Compression check results.
 

You got a blower on there?

Ok, I have no idea what that could do to the compression on cranking.
What does it rely on for 'demand'? It could be seeing high vacuum with
the throttle plate closed and be spinning up.

Meanwhile if you have no ping issues, then you have no issues.

Mike

DougW wrote:
>
> Mike Romain did pass the time by typing:
> > You 'can' have that much carbon in it.....
> >
> > You are the guy with the shitty wires and a miss?
>
> Just one shitty wire and that was on #6. Installed a new
> set of wires (thank you lifetime warantee) and it runs like
> a top. (slightly wobly, and ticks a bit, but like a top)
>
> > I have opened up more than a few and there can be a lot in there. I did
> > the head gasket on mine a while back and decarboned it before hand.
> > There were still a couple loose chunks of carbon in it because I didn't
> > road run it after the clean and these chunks were close to 1/8" thick,
> > more than 1/16" for sure. This engine only had 40K on it.
>
> Wow, that is a lot of carbon buildup! Don't think it's that bad or
> with my extra boost I'd be getting a lot of detonation. The plugs
> only had a very thin flaky layer of carbon on them. Still too much though.
>
> Probably O2 sensor again. Had this problem before with the sensor
> reading just a smidge off but still in spec. Wish there was an easy
> way to test those sensors apart from having a scope.
>
> --
> DougW

Re: Compression check results.
 

You got a blower on there?

Ok, I have no idea what that could do to the compression on cranking.
What does it rely on for 'demand'? It could be seeing high vacuum with
the throttle plate closed and be spinning up.

Meanwhile if you have no ping issues, then you have no issues.

Mike

DougW wrote:
>
> Mike Romain did pass the time by typing:
> > You 'can' have that much carbon in it.....
> >
> > You are the guy with the shitty wires and a miss?
>
> Just one shitty wire and that was on #6. Installed a new
> set of wires (thank you lifetime warantee) and it runs like
> a top. (slightly wobly, and ticks a bit, but like a top)
>
> > I have opened up more than a few and there can be a lot in there. I did
> > the head gasket on mine a while back and decarboned it before hand.
> > There were still a couple loose chunks of carbon in it because I didn't
> > road run it after the clean and these chunks were close to 1/8" thick,
> > more than 1/16" for sure. This engine only had 40K on it.
>
> Wow, that is a lot of carbon buildup! Don't think it's that bad or
> with my extra boost I'd be getting a lot of detonation. The plugs
> only had a very thin flaky layer of carbon on them. Still too much though.
>
> Probably O2 sensor again. Had this problem before with the sensor
> reading just a smidge off but still in spec. Wish there was an easy
> way to test those sensors apart from having a scope.
>
> --
> DougW

Re: Compression check results.
 

You got a blower on there?

Ok, I have no idea what that could do to the compression on cranking.
What does it rely on for 'demand'? It could be seeing high vacuum with
the throttle plate closed and be spinning up.

Meanwhile if you have no ping issues, then you have no issues.

Mike

DougW wrote:
>
> Mike Romain did pass the time by typing:
> > You 'can' have that much carbon in it.....
> >
> > You are the guy with the shitty wires and a miss?
>
> Just one shitty wire and that was on #6. Installed a new
> set of wires (thank you lifetime warantee) and it runs like
> a top. (slightly wobly, and ticks a bit, but like a top)
>
> > I have opened up more than a few and there can be a lot in there. I did
> > the head gasket on mine a while back and decarboned it before hand.
> > There were still a couple loose chunks of carbon in it because I didn't
> > road run it after the clean and these chunks were close to 1/8" thick,
> > more than 1/16" for sure. This engine only had 40K on it.
>
> Wow, that is a lot of carbon buildup! Don't think it's that bad or
> with my extra boost I'd be getting a lot of detonation. The plugs
> only had a very thin flaky layer of carbon on them. Still too much though.
>
> Probably O2 sensor again. Had this problem before with the sensor
> reading just a smidge off but still in spec. Wish there was an easy
> way to test those sensors apart from having a scope.
>
> --
> DougW

Re: Compression check results.
 

Mike Romain did pass the time by typing:
> You got a blower on there?

Yep. :)

> Ok, I have no idea what that could do to the compression on cranking.
> What does it rely on for 'demand'? It could be seeing high vacuum with
> the throttle plate closed and be spinning up.

Compression at idle/crank should be identical to a normally aspirated
engine. (hard to type whle slightly buzzed) :D

I foobared and didn't block the throttle open. Next time.

> Meanwhile if you have no ping issues, then you have no issues.

That's what I thought. Just wanted to get a basline and find out
for sure if there wasn't a big ass leak causing the rough idle.

--
DougW

Re: Compression check results.
 

Mike Romain did pass the time by typing:
> You got a blower on there?

Yep. :)

> Ok, I have no idea what that could do to the compression on cranking.
> What does it rely on for 'demand'? It could be seeing high vacuum with
> the throttle plate closed and be spinning up.

Compression at idle/crank should be identical to a normally aspirated
engine. (hard to type whle slightly buzzed) :D

I foobared and didn't block the throttle open. Next time.

> Meanwhile if you have no ping issues, then you have no issues.

That's what I thought. Just wanted to get a basline and find out
for sure if there wasn't a big ass leak causing the rough idle.

--
DougW

Re: Compression check results.
 

Mike Romain did pass the time by typing:
> You got a blower on there?

Yep. :)

> Ok, I have no idea what that could do to the compression on cranking.
> What does it rely on for 'demand'? It could be seeing high vacuum with
> the throttle plate closed and be spinning up.

Compression at idle/crank should be identical to a normally aspirated
engine. (hard to type whle slightly buzzed) :D

I foobared and didn't block the throttle open. Next time.

> Meanwhile if you have no ping issues, then you have no issues.

That's what I thought. Just wanted to get a basline and find out
for sure if there wasn't a big ass leak causing the rough idle.

--
DougW

Re: Compression check results.
 

Mike Romain did pass the time by typing:
> You got a blower on there?

Yep. :)

> Ok, I have no idea what that could do to the compression on cranking.
> What does it rely on for 'demand'? It could be seeing high vacuum with
> the throttle plate closed and be spinning up.

Compression at idle/crank should be identical to a normally aspirated
engine. (hard to type whle slightly buzzed) :D

I foobared and didn't block the throttle open. Next time.

> Meanwhile if you have no ping issues, then you have no issues.

That's what I thought. Just wanted to get a basline and find out
for sure if there wasn't a big ass leak causing the rough idle.

--
DougW

Re: Compression check results.
 

L.W. (ßill) ------ III did pass the time by typing:
> It's designed to pump at cranking otherwise the Detroit diesel
> 2-cycle engines would never start.

It does turn, but compression at cranking is +0psi. http://www.kennebell.net
when I put demand on the charger it closes off the bypass and start compressing
air, till then it's more of a slight restriction than anything else.

I can watch the boost/vac gauge and see perfectly normal numbers till the engine
starts seeing load. Idle is about 12 in vac in drive while stopped or 18in while
decelerating by letting off the skinny pedal.

> DougW wrote:
>>
>> It wouldn't. The blower only comes on if there is demand, otherwise it
>> bypasses internally. That and at cranking speed there isn't enough rpm
>> anyway.