Stock blaster rpm/ top speed

EB18

EB18

Location
Ontario, Canada
Hey folks,

My season is almost shot and I want to get a baseline before I give this thing a tip to tip overhaul over the off season. I just want to make sure my stock as a rock 61x #'s are where they should be.

I gps'd 42mph @ 6350-6400rpm full beans for like 30 seconds. I weigh probably 150-155lbs with my gear on. The blaster is also missing the intake grate which I'll be replacing.

Wanted to post this thread to get others stock #'s (not your super modded ski's #'s as those are irrelevant) and also post back when I get it on the water to see what kind of gains one could expect from some simple bolt ons.

On order is the High Speed Industries wake up kit, R&D intake grate. I also plan on D cutting my ride plate to get the nose up a bit since i'm a lighter rider. Paint, turf. Mostly I'm just trying to hide from my wife and kids in the garage all winter...

Cheers
 
Quinc

Quinc

Buy a Superjet
Location
California
With some minor carb adjustments you could probably squeeze another 2-3mph our of her. If your pump/impeller has eaten a lot of rocks and debris it will also hurt your top speed.

from wikipedia
"The claimed top speed was 44-45 mph. With its powerful engine, semi flat-bottomed hull, and chrome-alloy piston rings, "
 
EB18

EB18

Location
Ontario, Canada
Impeller is mint. I believe Yamaha advertised 44mph back in '93. It runs good. No flat spots in rpm range, pulls decently good but I only have my 2010 sj as comparison, which is obviously quite a bit quicker out of the hole. 6400rpm seems a bit low but maybe not for a stock machine?

All that said it didn't run when I bought it earlier this summer, and has been sitting for god knows how long. Runs great but maybe i'll get my 2mph back after a carb rebuild.
 
Last edited:
kevbo

kevbo

Location
dfw
Find a pipe and port the cylinder or install a 62t. Bend the impeller to reach to 6900rpm. It will pull much better and get into the upper 40s. They get more critical on tuning and not so pump gas tolerant if you push it more than that.
 
EB18

EB18

Location
Ontario, Canada
Great input! Thanks. Also @Quinc I read through your "maxing out my blaster" thread. Very cool read. I cant believe you got 57+mph out of that thing. Must have felt like a bullet.

Very curious to see what kind of minimal gains can be had from a few bolt ons. B-pipe is out of the question for now. Trying to get out some number that are better than "it makes a small difference" which is subjective to each individual butt dyno. I'll report back when it's all together.
 
Quinc

Quinc

Buy a Superjet
Location
California
If you want to go cheap:
-46mm mikuni carb (buy new off ebay for 210$)
-match intake manifold to new carb
-Carbon tech reeds
-Buy some porting templates from @yamanube and port your own cylinder
-Bore cylinder to 83mm
-Shave stock head 175-180psi or pick up an old pro-tech or R&D head.
-If you cant find an a/m exhaust run an oem 760 exhaust. Should be able to find one for 100$ or less.
-Solas concord or skat swirl impeller

-And replace your stock waterbox with a tdr or jetmanic or any aluminum box. Just a matter of time until your stock one blows up.
 
Last edited:
J

jrddillon

Location
dillon co
Quinc said:
If you want to go cheap:
-46mm mikuni carb (buy new off ebay for 210$)
-match intake manifold to new carb
-Carbon tech reeds
-Buy some porting templates from @yamanube and port your own cylinder
-Bore cylinder to 83mm
-Shave stock head 175-180psi or pick up an old pro-tech or R&D head.
-If you cant find an a/m exhaust run an oem 760 exhaust. Should be able to find one for 100$ or less.
-Solas concord or skat swirl impeller

-And replace your stock waterbox with a tdr or jetmanic or any aluminum box. Just a matter of time until your stock one blows up.
Click to expand...
can you give a little more info on using the 760 exhaust I asked about this on pwctoday and got no answers
 
C

Chandleracman

Location
Mesa , Arizona
I am in the middle of taking a stock 96 blaster and modding it. Started with factory b pipe , Ada head 37mm domes, jet maniac water box , jetted my stock carbs but thinking about upgrading it, msd ignition, duel cooling . Jet dynamic ride plate, and a worx201 . Still tuning it but , season almost over but what do you think would be my best bang for my buck upgrade next , doing more race set up then surf . Only flat water in az , miss the days out east at the (monster hole ) Sebastian inlet
 
C

Chandleracman

Location
Mesa , Arizona
Hadn't heard of zeeltronic before , but from what I see i like . Be able to adjust curve not just enhance . I have a programmer for my 96 xp that I think it is kind of same thing . Thanks for the heads Quinc, up much appreciated.
 
kevbo

kevbo

Location
dfw
Chandleracman said:
I am in the middle of taking a stock 96 blaster and modding it. Started with factory b pipe , Ada head 37mm domes, jet maniac water box , jetted my stock carbs but thinking about upgrading it, msd ignition, duel cooling . Jet dynamic ride plate, and a worx201 . Still tuning it but , season almost over but what do you think would be my best bang for my buck upgrade next , doing more race set up then surf . Only flat water in az , miss the days out east at the (monster hole ) Sebastian inlet
Click to expand...
You will have to get your cylinder ported for 7000+ rpm then adjust the pump load accordingly. The crank should be carefully inspected and seals replaced before pumping up any old ski. Find a 62T cyl, they require less work for going fast. A programmable ignition will get you better response on pump gas. Dont be surprised when you stick a piston as your fuel tank gets low.
 
M

mmancini

Location
Acworth, GA
Quinc said:
If you want to go cheap:
-46mm mikuni carb (buy new off ebay for 210$)
-match intake manifold to new carb
-Carbon tech reeds
-Buy some porting templates from @yamanube and port your own cylinder
-Bore cylinder to 83mm
-Shave stock head 175-180psi or pick up an old pro-tech or R&D head.
-If you cant find an a/m exhaust run an oem 760 exhaust. Should be able to find one for 100$ or less.
-Solas concord or skat swirl impeller

-And replace your stock waterbox with a tdr or jetmanic or any aluminum box. Just a matter of time until your stock one blows up.
Click to expand...
how do you fit a 760 exhaust in a blaster?
 
EB18

EB18

Location
Ontario, Canada
Quinc said:
If you want to go cheap:
-46mm mikuni carb (buy new off ebay for 210$)
-match intake manifold to new carb
-Carbon tech reeds
-Buy some porting templates from @yamanube and port your own cylinder
-Bore cylinder to 83mm
-Shave stock head 175-180psi or pick up an old pro-tech or R&D head.
-If you cant find an a/m exhaust run an oem 760 exhaust. Should be able to find one for 100$ or less.
-Solas concord or skat swirl impeller

-And replace your stock waterbox with a tdr or jetmanic or any aluminum box. Just a matter of time until your stock one blows up.
Click to expand...
I found a mint cheap 760 pipe off a WaveRaider. Will that fit a blaster hull/ my stock engine? Worth it now or only after boring cyl to 83mm? I did some searching around but haven’t found anything other than you mentioning it here. Thanks!
 
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