61x case porting - Help Wanted

[WaveDemon]

so then?

why would i want a 760 cylinder?

would that extra 20ccs of displacement be worth it given the higher EXH port?

you're right, that is why they are junk and should be sent to me to be used as boat anchors.

 

[Mouthfulloflake]

no way.

if I had a 760 cylinder Id use it!

I mean, Id use it to plant some tomatos in, since all 62t cylinders are really pretty much junk.

:biggthumpup:

 

[Matt_E]

yes, the port timing is higher.

And you're sure about that?

You are 100% positive port timing on a 701 62T is different from a 760 62T?

 

[WaveDemon]

And you're sure about that?

You are 100% positive port timing on a 701 62T is different from a 760 62T?

No, is that what he asked?

 

[Mouthfulloflake]

And you're sure about that?

You are 100% positive port timing on a 701 62T is different from a 760 62T?

maybe there are different 62t 701 cylinders?

werent the early raider ones the ones that used 61x sleeves? and the later used the 62t ( higher port sleeves)
?

if a 760 has this port timing, then weve been fed alot of BS all these years about the timing being wrong...

:dunno:

 

[Matt_E]

do the 62t 760s have teh higher port timing than the 62t 701s?

Yup.

 

[Mouthfulloflake]

No, is that what he asked?

thats what I was asking Oh Dark one.

the cylinders I have, I beleive were NOT resleeved.

Ive looked at 3 62t 701 cylinders, all had 61x exh port timing.

Ive never compared with a 760 cylinder.

 

[Matt_E]

maybe there are different 62t 701 cylinders?

werent the early raider ones the ones that used 61x sleeves? and the later used the 62t ( higher port sleeves)
?

if a 760 has this port timing, then weve been fed alot of BS all these years about the timing being wrong...

:dunno:

Not necessarily. I suspect different port timing has somethign to do not only with application (sitdown vs standup) but also displacement.
A larger displacement cylinder will have more power throughout. Sooo...I speculate that a higher port timing for more topend is an acceptable compromise in most applications, because the bottom end is taken care of by displacement.

The 6M6 650 has low port timing. The 61x is higher.
The 62T is higher yet.


Of course, I am likely full of ********.

 

[Matt_E]

thats what I was asking Oh Dark one.

the cylinders I have, I beleive were NOT resleeved.

Ive looked at 3 62t 701 cylinders, all had 61x exh port timing.

Ive never compared with a 760 cylinder.

You know, I wouldn't call that a 62T cyl then. Because effectively, it's a 61x. :haha:

 

[WaveDemon]

thats what I was asking Oh Dark one.

the cylinders I have, I beleive were NOT resleeved.

Ive looked at 3 62t 701 cylinders, all had 61x exh port timing.

Ive never compared with a 760 cylinder.

What about the intake port timing?

 

[Matt_E]

What are you talking about, intake port timing??? You mean transfer ports? The only things that are "timed" are ports that the piston is going by.

 

[WaveDemon]

What are you talking about, intake port timing??? You mean transfer ports? The only things that are "timed" are ports that the piston is going by.

Right, transfer. are those not ever raised ?

 

[Mouthfulloflake]

You know, I wouldn't call that a 62T cyl then. Because effectively, it's a 61x. :haha:

the castings are 62t, they are differetn than 6m6 or 61x.

I call it a lucky find! ( they were cheap...)

:biggthumpup:

 

[Matt_E]

Right, transfer. are those not ever raised ?

Good man, I do not know.

 

[QJS]

This is a pic of the cases I did for our FX1 project ski.
Chris.

 

[Octane]

And boy does it kick ass.. So much so that the engine now lives in a round nose, Cos i could`nt handle it all in the FX-1 hull.

 

[waxhead]

I am pretty sure the 62t and 64x have the same port timing

its only the 61x with the lower port timing

 

[unclehulka13]

This is a pic of the cases I did for our FX1 project ski.
Chris.

thats pretty much what i did to my cousins 650 cases. They rule now. There is ALWAYS material to remove.

 

[TheSimpleManLance]

This is a pic of the cases I did for our FX1 project ski.
Chris.

do you have a picture that shows more detail of it? something closer?

just curious as to what exactly was removed.

 

[Mouthfulloflake]

so?

all of these threads about how to improve on these cases, all of the ideas and discussion, and you couldnt or wouldnt share that before?

:bs2:

thats pretty much what i did to my cousins 650 cases. They rule now. There is ALWAYS material to remove.