Here's two of our latest Titanium rods from Cunningham. They feature forced wristpin oiling with 360 degree annular grooved bushing. These rods are for two completely different applications and as you can see there is quite a disparity between center-center lengths. However, because they are made from Titanium, we won't see the usual weight penalty from running the longer rod. Here are the weights for both:

5.500" - 374g total & 274g rotational

6.235" - 386g total & 278g rotational

Both have Cunningham's rolled (not cut) 296,000psi 3/8" rod bolts. To get an idea how much weight we're saving, take a look at a couple of our Cunningham 2pc forged 4130 "regulars" in a 6.250" & stock K20A2 (5.473") c-c length with 3/8" rod bolts.

5.473" - 512g total & 362g rotational

6.250" - 574g total & 398g rotational

To put this in perspective, the stock K20A2 rod weighs ~600g.

-Ron

 

Those are simply bad ***!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TrackSpeedRacing &raquo;</TD></TR><TR><TD CLASS="quote">Those are simply bad ***! </TD></TR></TABLE>

Agreed.

Pricing estimates?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by veggiemaster &raquo;</TD></TR><TR><TD CLASS="quote">Pricing estimates?</TD></TR></TABLE>

bend over and open wide.

not that you won't get your money's worth, but Cunningham needn't overcharge to hurt your wallet. ~$400- each?

 

$470-$480 each 16 week turn around time.

8 week turn around time = x 1.5

4 week = bling and hard for them to do

 

Add $50.00/rod for rifle drilled, forced wristpin oiling and 360 degree annular grooved bushing.

-Ron

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Aquafina &raquo;</TD></TR><TR><TD CLASS="quote">4 week = bling and hard for them to do</TD></TR></TABLE>

The 5.500's were rush expedited double cost per customer's special request and were done in just under 4 weeks.

-Ron

 

$$$$$ but that they look sweeeeet

 

I want some!!

 

Very nice!!!

What are they coated with?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by edo &raquo;</TD></TR><TR><TD CLASS="quote">rifle drilled, forced wristpin oiling and 360 degree annular grooved bushing</TD></TR></TABLE>

Do you think these features do much? Are they mainly beneficial for really high RPM operation? I know a lot of stock honda engines have used pressed pins in the past, so it seems like if the pin seized in the rod, you would have the same bearing/friction situation as a pressed pin. Increased cooling of the rod end and pin would be a benefit I guess. Anyway, thanks for posting all these cool pics! Any updates on your other various engine builds?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by edo &raquo;</TD></TR><TR><TD CLASS="quote">

The 5.500's were rush expedited double cost per customer's special request and were done in just under 4 weeks.

-Ron</TD></TR></TABLE>

Jesus, he has some bills.

 

I'm a firm advocate of forced wristpin oiling. In addition to the rod's pin oiling, our pistons feature double pin oilers as well to ensure the pinboss is well lubricated at all times. I have good success with this setup and prefer to speak from experience as much as possible.

-Ron

 

do you like to run tighter clearances on the large end of the rods to keep up oil pressure when using the rifle-drilled rods?

 

We use 0.0007" pin fit for both rod (PE) and piston (Pinbore).

On the big end, we run anywhere from .0015 to .0035 depending on the application.

-Ron

 

Hmm.

You don't run 0.0004 like most manufacturers? You must know something

 

Nice..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PyroProblem &raquo;</TD></TR><TR><TD CLASS="quote">Very nice!!!

What are they coated with?</TD></TR></TABLE>
.
TiN Titanium Nitride it appears.

 

It's almost a shame to put something so pretty all inside a block where you can't see it!

I've never heard why they wouldn't be, but would Ti rods as light as these be suitable for a high horsepower (say, 700+ WHP) forced induction application, turning around 10K RPM's with a stock K20 stroke?

 

I'll have some made for that application next just to see how it works! It won't be anytime soon though, so don't hold your breath.

-Ron

 

 

how much life do they have ? or are ok like normal aftermarket rods ?

 

Our 2240cc dev motor has Ti rods as well. Their first tour of duty consisted of 500+ full dyno pulls and 2 arduous race weekends. We'll be having Cunningham give them a once over and see how they held up. From the visual, the bearings, journals and PE bushings are immaculate.

-Ron

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tbone &raquo;</TD></TR><TR><TD CLASS="quote">
.
TiN Titanium Nitride it appears.</TD></TR></TABLE>

how do u know ....are u somekind of aerospace engineer ?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SUPERNATURAL &raquo;</TD></TR><TR><TD CLASS="quote">

how do u know ....are u somekind of aerospace engineer ? </TD></TR></TABLE>

Well a wannabe.. Never got the degree.
I'm might be back west in 2 weeks btw see you then