Topic: APE Ultra Cranks

[754]

Make Crowers came in boxes just like tose Ti rods..
 Wait..they still live in them boxes, I better get my big motor built soon..

[Jerry Rxman Griffin aka MuthaF'er]

Whats the weight of the Ti rods?

[Retro Rocket]

 You won't break one of these!!!!
 

I bet they'd break my wallet though....

[Captain]

Whats the weight of the Ti rods?

Titanium
Reciprocating. 81g
Rotating  200g
Total. 281g

Steel (Carrillo)
Reciprocating. 89g
Rotating  314g
Total 403g

Captain

[Retro Rocket]

Whats the weight of the Ti rods?

Titanium
Reciprocating. 81g
Rotating  200g
Total. 281g

Steel (Carrillo)
Reciprocating. 89g
Rotating  314g
Total 403g

Captain

OK, how much...?   

[Captain]

Whats the weight of the Ti rods?

Titanium
Reciprocating. 81g
Rotating  200g
Total. 281g

Steel (Carrillo)
Reciprocating. 89g
Rotating  314g
Total 403g

Captain

OK, how much...?

 US $2700.00

 Captain

[Captain]

Here is another useless piece of information.
If you add everything up you will find that my entire crank assembly (c/w with rods and pistons)
has a grand total under 10kg. (22lb)!!!!!
This provides a serious and quantifiable improvement to both acceleration and quicker steering (due to the 60% reduction in the gyroscopic effect).
For road racing this is invaluable.

Captain

[Big Jay]

Whats the weight of the Ti rods?

Titanium
Reciprocating. 81g
Rotating  200g
Total. 281g

Steel (Carrillo)
Reciprocating. 89g
Rotating  314g
Total 403g

Captain

I think you are a little off on the Carrillos. The H beam is 315 grams total.  240 / 75

[Big Jay]

Crower will make them. They have the specs for 750 rods. I have always felt a Carrillo "A" beam rod would be a great piece for the CB750. It is lighter than the "H" beam (which is fairly light) and plenty strong enough. I run the A beam in my FJ

I agree. H beams are way overkill for the sohc. I have talked to them several times about doing A beams.

[Captain]

Whats the weight of the Ti rods?

Titanium
Reciprocating. 81g
Rotating  200g
Total. 281g

Steel (Carrillo)
Reciprocating. 89g
Rotating  314g
Total 403g

Captain

I think you are a little off on the Carrillos. The H beam is 315 grams total.  240 / 75

 I am 100% accurate on my Titanium Rods but you have a point Big Jay and I was incorrect with the Carrillo's but as its been a while since I used any and I was going off memory. My apologies to you and everyone else for not getting this correct.
However the correct figures are as follows: 

 Captain

[Retro Rocket]

Whats the weight of the Ti rods?

Titanium
Reciprocating. 81g
Rotating  200g
Total. 281g

Steel (Carrillo)
Reciprocating. 89g
Rotating  314g
Total 403g

Captain

I think you are a little off on the Carrillos. The H beam is 315 grams total.  240 / 75

 I am 100% accurate on my Titanium Rods but you have a point Big Jay and I was incorrect with the Carrillo's but as its been a while since I used any and I was going off memory. My apologies to you and everyone else for not getting this correct.
However the correct figures are as follows: 

 Captain

I suggest that the Boldor rods may be heavier than the SOHC rods due to their longer stroke...? You were referring to Bolodor rods for those weights..? 

[Captain]

 Yes..........But I did state that my stroke was 69mm (Boldor)

 Captain

[MRieck]

Crower will make them. They have the specs for 750 rods. I have always felt a Carrillo "A" beam rod would be a great piece for the CB750. It is lighter than the "H" beam (which is fairly light) and plenty strong enough. I run the A beam in my FJ

I agree. H beams are way overkill for the sohc. I have talked to them several times about doing A beams.

I know I would be in for 2 sets big guy. You got me the A beams in my FJ.  I am sure they would come in around 300 grams or so (for the 750) and you could get 3 sets for the cost of Ti.

[kmb69]

.....you could get 3 sets for the cost of Ti.

True, but the formula for maximum horsepower is: MAXHP = CUBIC DOLLARS!     

[MRieck]

.....you could get 3 sets for the cost of Ti.

True, but the formula for maximum horsepower is: MAXHP = CUBIC DOLLARS!     

What math book did you get that out of professor?

[kmb69]

True, but the formula for maximum horsepower is: MAXHP = CUBIC DOLLARS!     

What math book did you get that out of professor?

It's titled: "Watching My Bank Account Shrink".     

[Bill/BentON Racing]

+1! Lol

[dragracer]

True, but the formula for maximum horsepower is: MAXHP = CUBIC DOLLARS!     

What math book did you get that out of professor?

It's titled: "Watching My Bank Account Shrink".     

As the old saying goes; you pay the cost to be the boss. That's why I bracket race. It keeps all things equal and change in my pockets.

[Captain]

 Here is the next part of the equation.

 Super light "billet" pistons.  These have all the features that current technology allow. 100% 3D machining, thin ring thickness and stack, differential sizing of skirts, horizontal gas ports, hard anodized and more.
 As for the wrist pin weight saving, the trick is to maintain strength............ Shorter pin.

 Captain

 

[Retro Rocket]

Very nice looking pistons....!!

[teebee67]

Wow - I'd love a set of those pistons !!!

[Bill/BentON Racing]

17mm pins I'd guess, what mm? Very very nice looking.

[madmtnmotors]

Here is the next part of the equation.

 Super light "billet" pistons.  These have all the features that current technology allow. 100% 3D machining, thin ring thickness and stack, differential sizing of skirts, horizontal gas ports, hard anodized and more.
 As for the wrist pin weight saving, the trick is to maintain strength............ Shorter pin.

 Captain

You are indeed the "Captain"! You can't post picts like that without more info:

>Are these something you developed on your own, with a local machinist, or are these available from another source?
>Will you be doing a build thread? (I sure hope so!)

[dragracer]

Piston looks very similar to the MTC pro lites we use in our big bore dragbikes.  Not sure what size your pistons are or the price but if they're over 71mm, it does give us more options on a modern design. An F model, high compression chamber configuration would be a plus. Affordability is the key.

[kmb69]

.....
>Are these something you developed on your own, with a local machinist, or are these available from another source?
>Will you be doing a build thread? (I sure hope so!)

Brent and his partner design and make most of their own parts. Their build threads are on Facebook.
Pretty sure they mostly post last season's stuff since they are competing with their latest innovations. 
Notice his pictures do not show the piston crowns as they are secret.   

Piston looks very similar to the MTC pro lites we use in our big bore dragbikes.  Not sure what size your pistons are or the price but if they're over 71mm, it does give us more options on a modern design. An F model, high compression chamber configuration would be a plus. Affordability is the key.

Pretty sure they are 74mm for his DOHC but I also think Brent is working on something a little larger. They are producing 190+ RWHP on their current road race machine and shooting for 200.
They seriously have the ability to make SOHC pistons if they desire since they are billet. "Affordability" on the other hand is a very relative term in "bleeding edge" technology.