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-   -   Best choice rocker arms (https://www.offshoreonly.com/forums/general-q/377527-best-choice-rocker-arms.html)

speicher lane 10-31-2022 08:36 PM


Originally Posted by Peter Oberg84 (Post 4850077)
. I live in Sweden so we don’t measure fuel octane like you and the engines where given 95 octane in the bench and I think that will compare to your 87 or 89? Timings @30 degrees

Eu 95 is the same as 91 Octane in North America... their EU98 is the same as our 93

Peter Oberg84 11-01-2022 01:03 AM


Originally Posted by Unlimited jd (Post 4850127)
if they use an a/f calculation based off actual fuel flow, and an air flow meter it usually comes in almost 1 full number higher than measured with a wide band in the exhaust or at least our super flow dyno is that way.

It was hooked up with wide band.

https://cimg8.ibsrv.net/gimg/www.off...e6be0475b.jpeg
https://cimg9.ibsrv.net/gimg/www.off...13b7f912f.jpeg

articfriends 11-01-2022 06:03 AM


Originally Posted by SB (Post 4850105)
Feel free to let us know why yours ‘are the best’ :thumbs

I followed his link to Chris Almonds website. Chris does spintron analysis, valve train design, has a fancy rocker arm for marine use etc. His website is a little vague, Ive conversed with him on fb post before, I imagine hes not cheap!

Brad Christy 11-01-2022 06:55 AM


Originally Posted by articfriends (Post 4850143)
I followed his link to Chris Almonds website. Chris does spintron analysis, valve train design, has a fancy rocker arm for marine use etc. His website is a little vague, Ive conversed with him on fb post before, I imagine hes not cheap!

Smitty,

Still harboring the dream of building a monster some day. I'm very curious what pricing is, as well.

Thanks. Brad.
(937)545-8991

Wildman_grafix 11-01-2022 08:09 AM


Originally Posted by articfriends (Post 4850143)
I followed his link to Chris Almonds website. Chris does spintron analysis, valve train design, has a fancy rocker arm for marine use etc. His website is a little vague, Ive conversed with him on fb post before, I imagine hes not cheap!

I have talked with Chris a lot, good guy with a lot of valve train engineering background from both the racing world and OEM design. As said pretty sure his stuff is expensive but if it holds up may be worth it.

Brad Christy 11-01-2022 03:28 PM


Originally Posted by articfriends (Post 4850143)
I followed his link to Chris Almonds website. Chris does spintron analysis, valve train design, has a fancy rocker arm for marine use etc. His website is a little vague, Ive conversed with him on fb post before, I imagine hes not cheap!

Smitty, others,

According to the website, titanium is discounted as an option for marine specific rocker arms. I have titanium connecting rods in high output model boat engines on literally every continent except Antarctica. Knowing what I THINK I know about Ti, it should be an excellent alternative to steel. At about 60% the mass of steel, considerably better metal fatigue characteristics and almost double the specific strength, I wouldn't think it would be a problem for anybody with deep enough pockets. Anybody have any direct experience with Ti rocker arms? Genuinely curious and all ears. As I stated, I'm still harboring the fantasy of building a monster some day. Given my line of work, I often think of what I could make myself (mostly just for the pride of doing it), and this very thing crossed my mind. They would be a pretty yawn-worthy part for me. Thoughts?

Thanks. Brad.
(937)545-8991

j272 11-02-2022 04:48 AM

Titanium is so rare in the US its got to be huge money. When they built the A12 and the sr71 they had to get the titanium from Russia through a CIA shell company. LOL

Brad Christy 11-02-2022 06:12 AM


Originally Posted by j272 (Post 4850269)
Titanium is so rare in the US its got to be huge money. When they built the A12 and the sr71 they had to get the titanium from Russia through a CIA shell company. LOL

J272,

I can buy titanium by the truckloads. I could make a set of rockers out of titanium by this time next week. I've probably got a scrap piece of material on my stock rack, as I type, that I could make at least ONE from. Availability is not a problem.

President Titanium I've bought from them on many occasions.

Thanks. Brad.
(937)545-8991

j272 11-02-2022 06:29 AM


Originally Posted by Brad Christy (Post 4850276)
J272,

I can buy titanium by the truckloads. I could make a set of rockers out of titanium by this time next week. I've probably got a scrap piece of material on my stock rack, as I type, that I could make at least ONE from. Availability is not a problem.

President Titanium I've bought from them on many occasions.

Thanks. Brad.
(937)545-8991

Today it is less and attainable. yes you are correct. i didnt realize that.
What is the price of titanium in 2022?
How much is titanium worth per pound?
. 999 pure titanium, 1 pound. New condition.
...
Elemental 1 Pound Titanium Round. 1+ $49.99 $51.99. . It is a relatively expensive metal as a result of its high energy electrolysis refinement process. To boot, that is today’s price which has dropped dramatically since the SR-71 was created.
here is a link to more info on titanium.
https://wisconsinmetaltech.com/titanium-and-the-sr-71/

boostbros 11-02-2022 08:22 AM

Anything is possible this has been done by many teams in the racing world to test most companies build a one cylinder version to see how it performs even Koenigsegg if that works you try real world, any volunteers? also ti is much stronger forged rather than machined anyone up to building a die to forge a few?


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