What motor to run.

What motor to run

  • LPW ported 701

    Votes: 5 27.8%

  • LPW 61x Big bore

    Votes: 13 72.2%
  • Total voters
    18
  • Poll closed .
D Slicker

D Slicker

Durham, dont forget it
Location
Pottstown, PA
I have a problem, what motor to put in my conversion.


Option A. is an LPW ported 701 which has great power though out the entire power band and if very controllable. 1/2 season


Option B. is a LPW 61x Big bore which hits really hard but can be a little violent. 4 tanks of gas


I will be putting my full spec intake on which ever one I use. Both motors run great. i am leaning more towards the 701. What would you do. I already own these and I don't feel like buying another motor so i'm using what i have.
 

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SuperJETT

SuperJETT

So long and thanks for all the fish
Location
none
Big bore and richen up a bit so it's not as violent. Mine is super smooth throughout the powerband but it took some tuning to get it that way.
 
D Slicker

D Slicker

Durham, dont forget it
Location
Pottstown, PA
The mid is ridicules but i think my 701 hits better real low. I have to admit I only rode the BB in my boat 4 tank fulls.
 
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N

njfl

X-H2
Does the big bore hit like a brick and then run out of breath quickly before you even get into the midrange power band (where you really need your power) or is it just too much power across the entire range for you?

Bigger is almost always better, but you have to manage the way the power is delivered. If it is as I described above, you might be able to play with water injection and get a little more out of it, but in all likeliness, it would probably require reporting to smooth out the power band.

I've rarely heard of anyone wanting anything less than violent, right? That's what we're all spending money on with these builds.
 
R

restosud

keep the big bore.there's no such thing as too much power.
just adapt your style to the powerband,unless it a closed course motor!
 
N

njfl

X-H2
crammit442 said:
Ride some full on motors and realize yours isn't actually very violent.:burnout:
Click to expand...

Harsh..., But you know what, it's often true. You think you have the most powerful motor in the world and then you ride someone else's that just takes it to another level.

If you think you can get more money for the big bore, you might just want to sell that one, and run your 701 (which it sounds like has a decent linear power band) then ride some of the various motors out at one of the rides and get a top-end rework and/or stoker by whoever's builder makes you happiest.
 
D Slicker

D Slicker

Durham, dont forget it
Location
Pottstown, PA
njfl said:
Harsh..., But you know what, it's often true. You think you have the most powerful motor in the world and then you ride someone else's that just takes it to another level.

If you think you can get more money for the big bore, you might just want to sell that one, and run your 701 (which it sounds like has a decent linear power band) then ride some of the various motors out at one of the rides and get a top-end rework and/or stoker by whoever's builder makes you happiest.
Click to expand...

I just bought the BB and the way cheap asses are on here I wont get close to what i paid. You are right about the 701 being more linear than the BB. If you could get the BB to act more like the 701 in that sense it would rock.
 
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crammit442

crammit442

makin' legs
Location
here
njfl said:
Harsh..., But you know what, it's often true. You think you have the most powerful motor in the world and then you ride someone else's that just takes it to another level.

If you think you can get more money for the big bore, you might just want to sell that one, and run your 701 (which it sounds like has a decent linear power band) then ride some of the various motors out at one of the rides and get a top-end rework and/or stoker by whoever's builder makes you happiest.
Click to expand...


NOT harsh. Just the way it is. Neither motor has TL/added stroke/race gas, etc. That's when things get violent.
 
N

njfl

X-H2
That's a tough call then. Honestly, if you're not planning to spend any more money on whichever one you choose, ask yourself which makes you happier.

Often, when someone rides a motor for a while they get bored with it and crave more power. You apparently attempted to get more power by going with the big bore, but it sounds like it didn't knock your socks off.

Which one are you leaning toward? My guess is the 701. If so, I'd stay with that one.
 
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D Slicker

D Slicker

Durham, dont forget it
Location
Pottstown, PA
njfl said:
That's a tough call then. Honestly, if your not planning to spend any more money on whichever one you choose, ask yourself which makes you happier.

Often, when someone rides a motor for a while they get bored with it and crave more power. You apparently attempted to get more power by going with the big bore, but it sounds like it didn't knock your socks off.

Which one are you leaning toward? My guess is the 701. If so, I'd stay with that one.
Click to expand...

I'm not sure yet. I am leaning on putting the bb in and retuning it. The BB did kick my ass I just wasn't expecting it to act the way it did.
 
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N

njfl

X-H2
crammit442 said:
Neither motor has TL/added stroke/race gas, etc. That's when things get violent.
Click to expand...

You know, that's a good point. It sounds like you just did a motor swap, so it's not like you were running water injection on one and not the other. I sense that the 701 has good port timing and the big bore may have less than optimal port timing. Based on what Charles mentioned, I would keep the 701 with its linearity and up the compression, get at least an Advent, and maybe later put a 4mm stroker crank in it. The same cylinder will likely be able to be mildly massaged to work with a 4mm stroke. The added stroke will net you more cc's and in an ideal way, adding more torque.
 
D Slicker

D Slicker

Durham, dont forget it
Location
Pottstown, PA
That is true. I took my 701 that I had ported last year and had him do a 61x BB that i put together later in the season and swapped them out. Same electronics but different carb and intake setup. I'm not sure how different Paul ports his BB vs 701. They are both 61x cyl.
 
SuperJETT

SuperJETT

So long and thanks for all the fish
Location
none
D Slicker said:
Same electronics but different carb and intake setup.
Click to expand...

Get it tuned, 'light switch' motors are normally because of carb tuning, being very rich down low and lean up top, in the mid range it gets close to perfect so it hits hard then runs out from being lean.

Or even the other way around too, lean down low, hits perfect tuning in the transition, but richens up.

Want to borrow my intake setup for a weekend?
 
D Slicker

D Slicker

Durham, dont forget it
Location
Pottstown, PA
Jett, I have a full spec on it now. I am leaning toward the BB I just need some time to tune.
 
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