Freestyle New ADR tuneable LW crank.

Nuklear6

Nuklear6

I Dream 10' Surf!
Location
Bordentown, NJ by week / Brigantine, NJ by weekend
Saw this and think it's a great idea but I have many questions.

1. how does lightest configuration compare to stock crank Web weights?

2. when changing the Web weights by 2 lbs does the crankshaft maintain a reasonable balance percentage ?

3. how will longevity be with what looks like aluminum insert nuts in plastics Web weights with stainless bolts holding them through a streel crank.

Just hope there gonna really put these through the pages of r&d before settling them. it's Def 2 stroke porn!

Chuck Palmucci
CPT Enterprise LLC
609 510 3062
 
McDog

McDog

Other Administrator
Staff member
Location
South Florida
I do know that it isnt about the weight according to what ADR has posted on facebook so far. They say the purpose is about adjusting case volume, which it still seems to me that purpose building cases would be easier and more dependable....but I have very little true knowledge so I will shut up now.
 
Ducky

Ducky

Back in the game!
Location
Charlotte, NC
McDog said:
I do know that it isnt about the weight. The purpose is about adjusting case volume according to ADR, which it still seems to me that purpose building cases would be easier and more dependable....but I have very little true knowledge so I will shut up now.
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It IS about the weight, as far as I know. Pretty sure they wanted a Lightweight, Full Circle Crank. Holeshot was pretty involced in that crank design I believe.

Edit: I might put one of these in my 819...we shall see.
 
Roseand

Roseand

The Weaponizer
Site Supporter
Location
Wisconsin
The Duckster said:
It IS about the weight, as far as I know. Pretty sure they wanted a Lightweight, Full Circle Crank. Holeshot was pretty involced in that crank design I believe.
Click to expand...
Ducky is right, ADR teamed up with holeshot to come up with this crank. He will have some test results to share relatively soon.

Sent from my SM-G920V using Tapatalk
 
Nuklear6

Nuklear6

I Dream 10' Surf!
Location
Bordentown, NJ by week / Brigantine, NJ by weekend
Christian_83 said:
You got some good points and aspects Chuck @Nuklear6 - how are you recovering by the way?
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@Christian_83 im getting better every day physically, dealing with some other minor issues that have kept me from working yet. But very hopeful ill be back soon. Thank you very much for asking it honestly means alot.

These cranks are definitely about changing weight with out affecting crank case volume and primary compression. They mention being able to change crank weight by about 2 lbs but no comparison to stock weight. Other light weight cranks on the market are almost 2 lbs lighter then stock weight and are built with material placement to keep proper balance percentage. Even though i dont build crankshafts ive worked extensively on high reving singles and adjusting balance percentages. Remember the top of the connecting rod, top bearing, wrist pin, piston, rings and clip weight are reciprocating mass not rotating mass. There for there effect/weight on the crankshaft changes at different degrees of the crankshaft rotation.

I still stand by this being a great idea and am not bashing. I just hope ADR was able to address changing web weight and only slightly effecting the balance rate.

I have capability to dynamic spin balance small cranks like this for r&d if anyone ever needed. It would cost some but not a lot. Only down fall is crank has to be pressed together and trued with no connecting rods on it. Then weights clamped the to rod pins. This is why it is more for r&d and crank design then worth doing to every crank assembly.

Sorry that got long

Chuck Palmucci
CPT Enterprise LLC
609 510 3062
 
holeshot

holeshot

HPE products
Location
ca
Just chiming in. ADR and i go way back. He called one day and asked if i had any input on a new crank design. i recommended full circle and explained why with examples of their use. Aaren spent countless hours on the design and manufacturing process i did not help in any way and cannot take credit for that.
This design has multiple purposes. it can be used as a full circle low weight with the delrin inserts to eliminate wasted space in the cases. this design tells the incoming charge where to be and where not to be. But be advised over stuffing cases is not the road to hp. you cannot displace the charge if it cannot be placed.
Running the crank as full circle with aluminum inserts is intended to smooth the lightswitch hit some riders with big builds complain about. they want big power but want it to come on a bit more smooth.
Running the crank with no inserts is the lightest configuration but does allow wasted space in the cases. this may or may not be a bad thing. lucky for us crankcase volume does effect performance but its not hyper sensative like port timing or chamber volume.
On my long rod builds the case volume is increased due to the long rod and stroker baseplate, and further increased by case porting because of the material removed. This should be a good candidate for a full circle crank. if it were a short rod build where cases were machined to lower the cylinder the case volume would be quite a bit less. this may not be an ideal situation at first. but it would allow the builder to add volume with case porting or with larger transfer tunnels. this puts rhe charge where its more easily scavenged rather than having it hiding in wasted space down in the cases.
All modern highly developed two strokes use full circle cranks. but simply bolting one in does not gaurantee magic hp gains. builders will learn how to use these cranks to their advantage, and this crank definately will have advantages.
As far as balancing i know that was a critical concern. Aaren and talked about harmonics and their effect on crankshaft life. i know he did his homework and im confident he is not handing us a buzz bomb.
Time will tell. i should have a few of these in my hands in a few days.
-holeshot
 
holeshot

holeshot

HPE products
Location
ca
This is an important correction to my previous post. the stuffers are NOT delrin. they are a high grade high temp chemical resistant 6-6 nylon the same matrial used by oems on mx cranks. they shoehorn in and alot of research went into the design.
 
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holeshot

holeshot

HPE products
Location
ca
As far as weight, the crankshaft is 1 oz lighter than oem with aluminum stuffers installed and 2 lbs lighter than oem without stuffers. the non full circle adr stroker cranks are the same weight as oem.
 
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holeshot

holeshot

HPE products
Location
ca
I will have one 5 and one 10 mil full circle available on monday at an introductory price. the full circle crank includes both aluminum and nylon inserts. pm if interested.
 
long beach local

long beach local

long beach local
Location
Az
Im having HPE build me a 5mil with the nylon inserts 85mm pistons ,I love trying new stuff out. Matt is going to make it a pump gas motor for my proforce should run good hope the allen screws stay put.
 
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