701 “wake up” exhaust mod

SexPanther · Jul 30, 2022

Reducer that goes in the breadbox exit on stock exhaust. I have one, haven’t tested it. Any thoughts on what should be expected?

kevbo · Jul 30, 2022

I would expect nothing considering the stock exhaust has no tuning. Ive never tried one, get a before and after rpm or top speed and spread some knowledge.

SexPanther · Jul 30, 2022

Sounds like a plan. I have current top speed readings. Tachometer recommendations? Is my rev limiter governing top speed? If so could zeal be beneficial even in stock trim?

kevbo · Jul 30, 2022

The stock rev limit is 7000 rpm or so. You won't get there without a very low pitched impeller.

fastgtfairlane · Jul 30, 2022

I riding friend put a Riva stinger insert on his superjet and picked up some top end.

SexPanther · Jul 30, 2022

It is outside of the scope of this thread but I am using my stock 62t to power a kawi 140 pump with a hooker 10/16 inside a 550 sx hull. I also have a stubby pump cone currently. The ultimate build goal was bottom end to pull my 200lbs out of the water. I seem to have that. Now I’d like to find more top end to run down the new school 2 strokes in the buoy course.

kevbo · Jul 30, 2022

A 62T cylinder will really come to life with a tuned pipe . Finding one that fits in a 550 hull is difficult since they are narrower than a Superjet. The 550s pump inlet is small for a 140, it can work okay in smooth water.

Jiffyjet · Jul 30, 2022

kevbo said:
A 62T cylinder will really come to life with a tuned pipe . Finding one that fits in a 550 hull is difficult since they are narrower than a Superjet. The 550s pump inlet is small for a 140, it can work okay in smooth water.

I fit a FPP mod pipe in the same setup and it pulls hard … SJ waterbox and out the SX rear exhaust works awesome
Using a 9-17 Skat and 750 pump swap
Plenty for me

SexPanther · Jul 31, 2022

Jiffyjet said:
I fit a FPP mod pipe in the same setup and it pulls hard … SJ waterbox and out the SX rear exhaust works awesome
Using a 9-17 Skat and 750 pump swap
Plenty for me

What does FPP stand for? Pretty close to my setup. I bet that ski rips! Have you ever checked your top speed?

Jiffyjet · Aug 1, 2022

SexPanther said:
What does FPP stand for? Pretty close to my setup. I bet that ski rips! Have you ever checked your top speed?

Factory B pipe mod length fits in nice
Stock SJ motor mounts fixed almost all the vibration I had earlier.
Dead stock Raider motor hits the rev limiter at 48.7 mph with a 9-17
Plenty more potential but I am super happy the way it is