Super Jet WHy is my bottom end so bad????????

[mademan9]

So i have 2 sn superjets, they are almost both a like. But one hits a lot harder on the bottom end. I cant seem to figure out why please help with any info.
Here are my 2 skis and mods

1. This one has great bottom end
Stock 701 61x with lightened flywheel
compresion is 165 in both cylinders
extended rideplate and scoop grate
stock pump with a solas impros cut back 9/17
New 44 black jack with blowsion flame arrestor
carbon tech reeds
blowsion girdled head with 37 cc domes
lightweight couplers
Protec pipe
x metal waterbox
jss coils with msd plug wires
flow control valve

2. This one not as good bottom end
Stock 701 62t with lightendflywheel
extended rideplate and scope grate
stock pump with 9/15 hooker
44 mikuni carb with blowsion flame arrestor
carbon tech reeds
ada head with 35 domes
stock waterbox
factory b pipe
msd enhancer
:scratchchin::dunno:
I sure thought with the b pipe and ada head it would hit as hard or harder then the protec with blowsion head. What could be my problem?
The throttle response seems to be there. For some reason it doesnt seem to get out the water that well.

 

[tor*p*do]

must be the x metal water box!

 

[mademan9]

LOL. Im thinking flow control valve and blackjack carb

 

[ATS_Aaron]

Porting. One is a X and one, predictably the one with less bottom end is a T.

 

[XJCrawler]

do you have a single 44 on the 62t? Is it an oem carb?

 

[Gainera2582]

Switch to dual carbs on the 62t(even just 38s will work). I find they have better power all over than a single on that style motor.

 

[mademan9]

It is a single 44. I didnt know that the 62t have worse bottom end the the 61x. What if I got my stock carb black jacked??

 

[ATS_Aaron]

Lets back up. When you say 62T, are you referring to the cases or the cylinders? Because the Superjet was sold as a 62T twin carb, but continued to use 61X cylinders. So if your 62T is out of a couch then it's probably a 62T cylinder and has the higher port timing for better top end.

If it's 62T cases then why only one carb?

 

[mademan9]

its out of a waveraider. 62 top and bottom

 

[XJCrawler]

its out of a waveraider. 62 top and bottom

There's your answer, the port timing is higher in the 62t cylinders (better for top end)

 

[mademan9]

So whats my options for making great bottom end??

 

[FlightRisk]

just grab a set of 61x cyls and pistons. Porting is the key to making bottom end power out of these cyls. Find a set already ported or send them to someone and get them done.

 

[SUPERTUNE]

Check your PM box.

 

[sjetrider]

Check your PM box.

Geeezz why the secret LOL fill us all in on those brilliant thoughts bro.

 

[SUPERTUNE]

If I did... the class CLOWN would show up!

 

[sjetrider]

LOL I heard that. I look for threads you post on for insight so I hate you feel like that. But I dont blame ya.

 

[mademan9]

Thanks for the help guys. Now I have a new starting point.

 

[SXIPro]

Check your foam. Maybe one ski is super waterlogged???

 

[mademan9]

thats funny you said that. I will be refoaming this winter. I do feel like it is a bit heavier.

 

[rollin5150]

You may be able to get more bottom end with that cylinder by playing with the water injection screws on the B-Pipe