700 Dragon Cylinders on 600ves bottom end?

[RandLracing]

I was doing some thinking and came up with an idea. The 700 dragon motor is based on the small block bottom end but, it has a 68mm stroke vs 64mm on the small block 600's. What I am wondering is if the 700 cylinders would fit the 600 small block bottom ends with the 64mm crank, making a 660? If they would bolt up would you need to deck the cylinders since they would be on a shorter stroke bottom end? How would the stock porting work? I'm guessing the 600 heads could be re-cut to work? Thanks Guys.

 

[purepolaris600]

hay i have a 06 600 ves and i was thinking the same as u are u look on slp or carls and there 660 big bore kit is 700 jugs but i am pretty shur they needed to be ported

 

[RandLracing]

Well, I know SLP, Carls, Bikeman and every other shop just takes your 600 cores and sends you 600 cylinders that have been bored, ported and re nik'd for the 700 pistons. I'm thinking if you could get the dragon 700 cylinders used and bolt them up you could save some money and have a pretty decent set up. I have herd from a couple people now that they will bolt up, then you shave 2mm off the bottom off the jugs for the shorter stroke... Now I am wondering how the stock 700 porting would be. Also, The stock 700 heads should work decent as the squish band would already be cut to the 700 pistons... any input would be great. Thanks again guys.

 

[RandLracing]

Anyone have any more info? Thanks.

 

[meathooker]

my buddy had this done on 600HO cases; not sure if it will work on ves cases. iirc carl's did the work; i'd check with them first.

 

[IQRIDR]

I believe that the pistons Carls is using are 02-05 700 VES pistons, not 700CFI pistons. When I ran a 660 for 2 years that what I used. If that is the case not sure if they are the same bore or if the head would need to be cut differently.

 

[xcdhracer15]

any other info on this?

 

[RandLracing]

The Dragon 700's use 81mm pistons just the same as the older 700's. Here is the info I have gathered so far...

- 700 cylinders will bolt up to the 600 carb cases.
- Take 1 mm off the bottom of the Cylinders where they drop below the mating surfaces to keep from Hitting the case.
- Deck the bottom of Cylinder 2mm
- Use 600 head to keep plumbing close to stock/ 600 heads flow coolent better.
- Keep squish same as 600.
- Radius Dome/Squish Band intersection.
- Cut Squish band just over 81mm diameter.
- Block off CFI port.

Basically I just need to figure out porting... I would think after decking the cylinders 2mm on the bottom it would bring the port timing back down to where it would need to be. Any help with porting?

I think this would be a fairly economical way to build the 660 if you could get away with the porting. You could see your cylinders pick up the 700 cylinders for nearly the same price. You would save the cost of boring and re-plating which would be in the $400-450 range and if you could save the cost of porting you would really be getting somewhere.

 

[rab]

I think the crank case will have to be bored to accept the larger cylinders

you will also have to check wrist pin diameter

 

[440dart]

so older 700ves pistons are the same as 700cfi pistions?????

 

[RandLracing]

They are the same bore, 81mm. That is all I am sure of.

One other thing, It is possible with a few mods to drop the dragon 700 crank in the 600 cases also... that is a another whole deal there tho.

 

[Bishopvillian12]

Does anyone know what became of this

 

[slash]

try Tatersporting in Hazelton he did my 660 it's a 600-cyl board and ported uses a 700 piston and a head that drops into the cyl .
mine makes around 150 hp.
Mines a 09 cfi2 motor.

 

[Bishopvillian12]

You got yours bored randlracing was talking about using 700 cfi cylinders to start with. I wanted to see how far he got with going that route. I have the parts to go the 700 cylinder route just curious about the port timing. I really do t want to start to disassemble my sled yet as we could get more snow stil