Super Jet 701 62t boring question

piratelife

piratelife

Frandsen works
Location
In the hood wood
cennijimenez said:
Ya I got an 02' 701 motor bone stock. In that case should I be doing something else?
Click to expand...

You wont be able to bore cylinder to 84mm. The sleeves on the 61x cylinder are thinnner. I would check into one of the jetmaniac setups. They do a 717 kit that has great reviews and its affordable. He is on this site pm him for more info, im sure u wont be disappointed
 
Freakrider

Freakrider

X247
Location
Tampa Bay area
take a look at this: http://www.groupk.com/restof800sj.htm

Group K "Most full-out racing SuperJet cylinders are fitted with larger cylinder sleeves that can accommodate 85.5mm pistons (781cc). The 781 setups works great, but they required engine complete teardown to bore the top-case, as well as the extra cost of sleeving. For our F800, we opted to bore the stock sleeves as far as was safe, thus avoiding the costs of sleeving and case boring. The maximum diameter limit of the stock sleeve is 84.5mm. Given this, we opted to bore to 84.0mm to allow us room for later over-boring (84.25 & 84.50). While the base sleeve (that sticks out of the bottom of the cylinder casting) gets very thin, it is still stable enough to endure the operation of a 7200-7300 rpm engine. One nice side effect of boring the stock sleeves to 84mm is improved cooling (a result of the shorter “steel” heat path from the piston to the aluminum casting)."
 
piratelife

piratelife

Frandsen works
Location
In the hood wood
Jump On It said:
take a look at this: http://www.groupk.com/restof800sj.htm

Group K "Most full-out racing SuperJet cylinders are fitted with larger cylinder sleeves that can accommodate 85.5mm pistons (781cc). The 781 setups works great, but they required engine complete teardown to bore the top-case, as well as the extra cost of sleeving. For our F800, we opted to bore the stock sleeves as far as was safe, thus avoiding the costs of sleeving and case boring. The maximum diameter limit of the stock sleeve is 84.5mm. Given this, we opted to bore to 84.0mm to allow us room for later over-boring (84.25 & 84.50). While the base sleeve (that sticks out of the bottom of the cylinder casting) gets very thin, it is still stable enough to endure the operation of a 7200-7300 rpm engine. One nice side effect of boring the stock sleeves to 84mm is improved cooling (a result of the shorter “steel” heat path from the piston to the aluminum casting)."
Click to expand...

This would also be a good affordable option with the power your looking for. You could also send your carbs well your at it!!!!!
 
WaveDemon

WaveDemon

Not Dead - Notable Member
Location
Hell, Florida
piratelife said:
wrong a 62t cylinder can be safely bored to 84mm with 2 bores left............The 61x is 83mm max....
Click to expand...
wrong, I ran at 86mm for 2 years until I lost a crank smart guy.

plus, the further you bore the cylinder the more you lower the port timing for better low end.
 
Last edited:
piratelife

piratelife

Frandsen works
Location
In the hood wood
WaveDemon said:
wrong, I ran at 86mm for 2 years until I lost a crank smart guy.

plus, the further you bore the cylinder the more you lower the port timing for better low end.
Click to expand...

WOW LOL okay smart guy!!!! I know that u can go past 85 mm on a 62t and also u can go past 83mm on 61x. Im just saying that i would not want to take a stock cylinder out to its last bore!!!!!! That would be a real brand new guy thing to do!
 
WaveDemon

WaveDemon

Not Dead - Notable Member
Location
Hell, Florida
piratelife said:
85 mm is the most u can go on a 62t cylinder......The crank dose not matter...........What are u trying to accomplish?
Click to expand...

snowxr said:
It depends on your cylinder. A 61x and 62t 701 cylinders can go out to 83mm max, but add big bore sleeves, and you can build a 771 or bigger motor. A 62t 760 cylinder can be bored to 86mm, due to it's larger sleeves.
Click to expand...

piratelife said:
wrong a 62t cylinder can be safely bored to 84mm with 2 bores left............The 61x is 83mm max....
Click to expand...

piratelife said:
WOW LOL okay smart guy!!!! I know that u can go past 85 mm on a 62t and also u can go past 83mm on 61x. Im just saying that i would not want to take a stock cylinder out to its last bore!!!!!! That would be a real brand new guy thing to do!
Click to expand...


you know we can read right? first you were wrong now you're lying about it. why don't you spread some misinformation in another thread for a little while. I think you've done enough here.
 
Last edited:
N

NVGuy

Location
United States
Dont worry about the miss information, I am going to end up shipping the motor to Jetmaniac. talked to him and just by talking to him he made my decision on what company i am going to choose. I talked to Group k, because that was my first choice but hands down Chris at Jetmaniac has way better customer service and helpful with all my questions, and also was recommending different aftermarket parts, as where Group k wasnt friendly and wasnt very useful to me.
 
piratelife

piratelife

Frandsen works
Location
In the hood wood
WaveDemon said:
you know we can read right? first you were wrong now you're lying about it. why don't you spread some misinformation in another thread for a little while. I think you've done enough here.
Click to expand...

I dont no who u think you are buddy!!!!!!!!!! All i was trying to do is help this guy out..And it looks to me like he went with one of the companys i suggested....I know the sleeves are big enough to go past what i said but i personally thinks its not a smart or a safe thing to do!!!!! So go harass someone else "smart guy" lol...
 
piratelife

piratelife

Frandsen works
Location
In the hood wood
WaveDemon said:
you know we can read right? first you were wrong now you're lying about it. why don't you spread some misinformation in another thread for a little while. I think you've done enough here.
Click to expand...
<br><br>I dont no who u think you are buddy!!!!!!!!!! All i was trying to do is help this guy out..And it looks to me like he went with one of the companys i suggested....I know the sleeves are big enough to go past what i said but&nbsp; i personally thinks its not a smart or a safe thing to do!!!!! So go harass someone else "smart guy" lol...
 
piratelife

piratelife

Frandsen works
Location
In the hood wood
snowxr said:
that's right. I think Ronnie should have the camera ready for that one. And the caption will read " The legend makes time for the little people"
Click to expand...

oh okay this is making since to me now!!!!! you guys must be "Good Friends". what a joke!.............The haters come n flocks i guess......This will be my last post on here for you keyboard warriors lol
 
You must log in or register to reply here.
Top Bottom