I just noticed Isky also do an adjustable pushrod. Might not be a bad idea.

Should have something by then for you to see.

And Dattoman you are still special

My roller rockers turned up today, [Oooooh, ahhhh, nice] so that was pretty quick. Less than a week. Total cost, delivered, was $777.76 Not cheap, but in 20 years, they will be rare items & sought after in the same way as vintage speed equipment is sought after today.

Feral
Looks like i will be asking you to show me a sample of your pushrods for these rockers when i come to visit. [soon]

The thing that made up my mind was the reduced side loads on the valves.

As I run short guides, the wear rates are quite high. This means the potential for an engine demolition from valve guide failure/breakage are quite high at 10000+ RPM. The nismo rockers are very good and reliable, but still put substantial side loads on the valves at high speeds. I want the extra reliability.

High RPM speedway mini sprinter engines (A12's) use roller rockers fairly commonly.

I will have to look out for a suitable project car for my grand daughter. A flash 1200 coupe maybe Although by then, anything with petrol burning engines will probably have a health warning as a toxic waste producing device like cigarette packets do now. The taxes to run one by the minute will make international mobile phone bills look cheap

OK, we'll split it.

I was actually thinking I should be inline for that kickback first

Small commission would be nice. They probably didn't make any after mine until you guys started jumping at them.

Ah well.......I'm not special anymore

Now if I could convince YT to give me a kickback.............

Quote:Feral
OK, what was it that pushed you over the hump & prompted the call to order them?
It looks like Yella Terra may have had a small surge in orders for these in the last few months, possibly as a result of the discussion on this site recently.

I couldn't think of a better engine than your A13 to use them on. This thing is a true treasure & deserves only the very best,.. & it belongs on the street in something light. [Like a 1000?] Woohoo.

Edit
Congratulations on the new arrival. She looks to be a fine addition to the family. Do you have a Datsun project put aside for when she is old enough to drive?

On another point, i just had another look at your A13 engine on your website, & it came with the Nismo 1.52 to 1 ratio rockers, yet you are removing them in favour of the Yella Terra roller rockers. The rollers offer only the smallest increase in ratio, so i'm interested in the motivation to change these items, keeping in mind the cost, which is not insubstantial.
I made a budget allowance of $1,000 for mine, ready to run.

They're a beautiful piece of functional art.

I just picked up a set from Yella Terra also.
These have been on my shopping list for a while and now was the time. I will fit them to the A13.