More horses! - Page 2

fast fred · 17 July 2007, 15:42

same Moda

cuzz it's best to be Ready at All times

for Any thing that mite come around the ben

Nos4r2 · 18 July 2007, 00:49

Fred that motor is gorgeous! What was it originally? Looks like a modded Stinger from the pics?

Have you done any work with pressure waves and expansion chambers on dry exhausts? I wondered about trying it on one of my old mercs but decided it wasn't really worth the hassle to mod a 50 Blueband. Too much work to play with a blind bore.

fast fred · 18 July 2007, 01:56

70hp cases are easier to come by, but for the most part STINGER.
the reflection wave is vary important, the in line triple works the wave the best,
cuzz when one cyl is closein one is exhaustin witch forces fresh fuel and air mix that has passed out of the cyl that is closein back in. with the right length tuna
you can get maximum affect. if you separated them with 3 expandos it would lose hp.

them blind bores, they do go, but they run out of port timin early and fall off fast on the power curve at the top.
this Moda peaks at 6700rpms, at 8000rpms she has lost 1 3/4 hp from peak.

fast fred · 18 July 2007, 01:58

Quote:

Fred that motor is gorgeous!

thanks

Nos4r2 · 18 July 2007, 11:13

Quote:

Originally Posted by fast fred

cuzz when one cyl is closein one is exhaustin witch forces fresh fuel and air mix that has passed out of the cyl that is closein back in. with the right length tuna
you can get maximum affect. if you separated them with 3 expandos it would lose hp.

Can you not get the same effect using a 3:1 spanny or would you get a drop-off of torque at low RPM and get a 'powerband' effect like a 2 stroke bike engine?

I guess a 3:1 spanny wouldn't be the easiest thing to make properly though-even the Japs couldn't do it very well on the production bikes that used them. They always went better with 3 spannys.

fast fred · 21 July 2007, 10:54

it gets the same effect as a 3 in to one. the demand on the water are vary dif ' than on land, as small as my hull is, it will never see the rpm range my triple street bikes did. on land the wave don't start workin till like 8000, at 8 on the water she is startin to over wind, hp is startin to fall off.

fast fred · 21 July 2007, 11:01

the one on the right i built for a friends drag boat, mine's the dusty one on the left.

book ends

pathalla · 22 July 2007, 11:50

Quote:

Originally Posted by fast fred

same Moda

cuzz it's best to be Ready at All times

for Any thing that mite come around the ben

you might need to explain to some folks out there what your little purple connector does.....

fast fred · 23 July 2007, 13:18

well them thare is Nitrous Oxide injectors, only one in the shot, but with 3, located after the reed blocks to eliminate any chance of the reeds freezin, they WILL Double the HP output when ya hit the switch. by injectin NOS and Alcohol
into the race gas Moda.

Nos4r2 · 23 July 2007, 16:34

HEy Fred, how many horses do you think it's possible to get out of an 85 Yam and still keep it reliable?

fast fred · 28 July 2007, 16:36

about 35-38hp a hole.

prairie tuber · 28 July 2007, 22:55

Quote:

Originally Posted by fast fred

about 35-38hp a hole.

Am I understanding this right - that my 40 hp 3 cyl yammie could be modified to put out 105 hp and still be reliable???

fast fred · 31 July 2007, 11:11

bore size is a lot smaller on the 40-50hp, not that you couldn't get them kinda hp out of it, it would not last and it would be a hand full to drive. far easyer at 52cubes in Yamaha for the hp numbers, like this one hear

fast fred · 31 July 2007, 12:01

ya would need some of this stuff ,

cuzz i dont care what gas cost for my boat,

prairie tuber · 01 August 2007, 06:06

Wow! That motor er, 'moda' is a piece of artwork. How fast have you gotten your SLT to with a beast like that pushing it along?

fast fred · 01 August 2007, 12:54

she'll hit 70 or so dependin on who's in the boat, hears a couple more of them
Yamahas with 90 carbs, the first one hear broke my leg for me,

this one, she's lookin to put a hurt on some one

Nos4r2 · 01 August 2007, 18:39

Thats a LOT of hp

What's feasable using 95 octane pump gas?

fast fred · 03 August 2007, 11:24

some thin about 20hp just moda, 30+hp with Nos

chris tcat · 08 August 2007, 22:12

Quote:

Originally Posted by fast fred

i'd need to see the specs that thay gave you. Tack the crank, snip the revlimiter, she wakes up. can do for yas, thare is more you can do, that powerhead shot is for my SLT ( Super Light Tunnel) same as yours, yamaha 50hp wakes up too.
this is a Hot-Sue crank, make yours look the same, Mains and throughs

Hi there, can i ask what you mean by TACKING the crank !!! thanks Chris.

fast fred · 15 August 2007, 12:16

them Hot-su's need the crank welded or they lose thare press or timeing above the rev limiter.