The Great 61X/62T Debate, Philosiphized....

[Idok]

never rode your boat with that combo.....but up here we are finally starting to see the 61x light....

how can you beat it?


61x
bpipe
mild bump in compression (i dont even feel the need for 180...Im good at about 165)
slight static timing advance
single 44
oh, and a concord.......,


yes for flatwater this setup might be a little weak........I hate to tune, and I like simplicity....give me a single 44 any day of the week.......


best part abiout these motors......when they blow, who cares!!!!!

they are cheap as anything to rebuild.....and like saki said, they are PLENTIFUL...


as of right now I think I have 3 sets of T cases.........Ill probably end up keeping maybe ONE, and getting rid of the rest to build surf X motors.........

Ill keep one T motor, and maybe even go dueling carbs :bigeyes: for a "flatwater" setup.....

 

[Matt_E]

Yeah, tuning duals sucks compared to a single, no argument there. But once it's done, it's done.

I was debating going to a single a couple weeks ago and decided to leave well enough alone. I don't really have a need to retune my carbs unless I change my setup.

 

[Idok]

yep. i had 200psi, 3mm advance static, and a 48 carb.

ive heard wavedemon loves his frankenstein too.

couple of weeks ago I was trying to tune:

62T/61x
LPW ported 701
Bpipe with a single 48....

I could NOT for the life of me get it to run right.........got upset with it on friday, tore it out of the boat to drop in another motor for the weekend and found a blown out rear seal

will be trying the 48 on my X cased LPW motor THIS weekend! :Banane01:

 

[Mouthfulloflake]

thanks for the reassuring info and post guys.

ive nabbed up a couple of cheap 62t cylinders.

Im sure now they wont be found CHEAP anymore.

shut the hell up!

:biggrin:

 

[sjetrider]

oh, and a concord.......,

IDOK, I thought you were an "I" prop advicate? What changed you to a concord?

 

[eschberg]

Pardon my newbism here... What about a 62T with a single carb conversion vs 61X case, are they the same just about?

 

[Idok]

oh, and a concord.......,

IDOK, I thought you were an "I" prop advicate? What changed you to a concord?

well, running a 14.5/18.5 right now...here are a couple of comparisons.....

loved this prop in the surf with a stock cyl no porting...has great upper-low end and fantastic midrange...perfect for the surf...

the I dropped my LPW motor in there......still great midrange, no cavitation off the bottom but didnt really "like" the low end response...again, no prop slip..just didnt like it as much as with a stock X cyl....


I FOUND a minty concord 13/17 in my old square...I had thought it was just another chopper prop in there, but was happy as hell to find a concord....



will be dropping the concord on my LPW motor hopefully this weekend....but will tell you that it RIPPED as well on a stock cyl's boat....


pauls motor that IM running now is my FIRST ported motor.....before that all have been stockers..

 

[keefer]

:hail: Hail yeah, I built up a 62t cyl on 61x cases with single 46 on a B1 I recently sold. That thing would rip for a non ported 170psi single carb. I can only imagine what it would do with 200psi and a good pipe. :Banane01:

 

[sjetrider]

secret is out. I think wax is somewhat aware of this value as well I sold him a 62T cylender last month, but I think he has bigger plans than bolting it to a 61x case ( BB/FT probably). YAMASAKI hit it on the head if your looking for reliable, decent BRAP. I myself am caught up in the arm yanking contest over here.

 

[Matt_E]

Pardon my newbism here... What about a 62T with a single carb conversion vs 61X case, are they the same just about?

It'll cost you. There's no real performance gain going to single on a 62T case.
For some reason, there's a concern with fuel delivery at WOT with that combo, at least with the Kawi 650 manifold.
The ATP manifold (UK) seems to be the ticket, but it's spendy.

Moneywise, there's no real difference between dual 44's or a single carb - since you have to get a manifold for it.

I will say that a 61x bottom end with single 44 carb, 61x topend at 754cc, stock electrics, porting, B-Pipe, pulls very comparable to a 62T bottom w/dual 44's, 720 61X topend, identical porting, B-Pipe.
Granted, the T case motor has some extra goodies (TL, etc), but if I was to build another motor, it would be on X-Cases.

 

[Idok]

It'll cost you. There's no real performance gain going to single on a 62T case.
For some reason, there's a concern with fuel delivery at WOT with that combo, at least with the Kawi 650 manifold.
The ATP manifold (UK) seems to be the ticket, but it's spendy.

Moneywise, there's no real difference between dual 44's or a single carb - since you have to get a manifold for it.

I will say that a 61x bottom end with single 44 carb, 61x topend at 754cc, stock electrics, porting, B-Pipe, pulls very comparable to a 62T bottom w/dual 44's, 720 61X topend, identical porting, B-Pipe.
Granted, the T case motor has some extra goodies (TL, etc), but if I was to build another motor, it would be on X-Cases.

interesting.......

 

[Mouthfulloflake]

but if I was to build another motor, it would be on X-Cases.

more interesting to me.

here we go again, setting the market prices, watch no, 62t case prices fall, and 61x cases climb back up.

jeeze.

we should keep all of this discussion QUIET.

:sneaky:

 

[Matt_E]

It's all planned. See, this way I can buy cheap 62T cases and X cyls.



Suckers.





To explain my statement: Yeah, the T cases are better. However, the performance of the X cases really impressed me. To add to that, you can get X cases for less than half of T cases.
You only need ONE carb, and no special intake.

What's not to like?

 

[Mouthfulloflake]

you brapstard!

Ive bought a few sets of 61x cases for under $50.
that 1/4 the cost of 62t cases usually.

save $40 on the carb rebuild kit too.

My search for cheap 62t cases, officially ended almost a year ago.

It's all planned. See, this way I can buy cheap 62T cases and X cyls.
Suckers.

To explain my statement: Yeah, the T cases are better. However, the performance of the X cases really impressed me. To add to that, you can get X cases for less than half of T cases.
You only need ONE carb, and no special intake.

What's not to like?

 

[Matt_E]

I sold T cases for 100 bucks to Troy.

 

[Mouthfulloflake]

thats not the NORMAL going rate though.

I bought a running superjet for $280 too.

that not how value determination works though.

 

[Mouthfulloflake]

ITs already started!

http://www.x-h2o.com/threads/p=99737&posted=1#post99737

 

[sjetrider]

I am currently building a case ported 61x w/ ported 61x 82mm cylender and single 48mm intake mnfld.. I lack only a carb and a few gaskets (should I have after market reeds?) . When it is built, I will pull the 62T case w/ 61X ported cyl and duel 44mm carbs out and put this in and see what we got. Will let ya know in a couple weeks (assuming I find a carb).

 

[sjetrider]

prop

well, running a 14.5/18.5 right now...here are a couple of comparisons.....

loved this prop in the surf with a stock cyl no porting...has great upper-low end and fantastic midrange...perfect for the surf...

the I dropped my LPW motor in there......still great midrange, no cavitation off the bottom but didnt really "like" the low end response...again, no prop slip..just didnt like it as much as with a stock X cyl....


I FOUND a minty concord 13/17 in my old square...I had thought it was just another chopper prop in there, but was happy as hell to find a concord....



will be dropping the concord on my LPW motor hopefully this weekend....but will tell you that it RIPPED as well on a stock cyl's boat....


pauls motor that IM running now is my FIRST ported motor.....before that all have been stockers..

Good to know, I have a concord 13/16 cut back and have tried the "J" and was going to try an "I" on my duel 44 ported set up. Sounds like no need to go there especially since I do not yet have an "I".

 

[yamahammer]

X case can certainly rip- my latest frankenstein engine Xcase/64T cylinder, homemade porting (we tried to make it look like mattE's pics in porting thread from memory, but when we got done and compared to his pics all ports were way bigger- kind of worried at first) old RIVA dual 44 manifold with ebay dual 44s, carbon-tecs, b1 mod pipe, and no rev limiter is a hammer and will pop my b1 out of flat water if throttle is nailed at idle- is motor in my avatar