'Rand' the jake of comupter audio!

hyjacker!

Excellant news for the T4 people!!

I never could figure out why someone didnt go down this path 20 years ago for the T4 (maybe they did and I missed it) The VW drag guy's have been using them for years and years.

Ford 5.0 iron block engines for Mustang GT's had roller lifters in 1984.

9k RPM will be easy to achieve and maintain with this setup. Combine the light lifters and the ramp design of the cams and we wont need valve stem busting 300lb seat pressures on the face of the valves!!





I have one more T4 engine for myself coming up soon


B

Why not arrange with Jake to process the audio file for him before he hosts it on his website. I'm sure a lot of us would like the benefits of listening to a more balanced version. Is there a way to trim the files to an 80 minute limit so that they can be burned to an audio CD? I like to listen to them in my car, and it does not handle MP3 files. If you can permit some of us to get these revised versions, that would be great.

Mmmmm, roller valvetrain, I've been waiting for this since you first threw some teaser picks out over a year ago. Awesome stuff, can't wait to see the test numbers.

GREAT news Jake BUT now I suppose I need to wait 2 years for the ultimate T4
'ENGINE BY JAKE".Just when I think I have the wife talked into a replacement for the 2056 I dropped a valve in. That is unless you are looking for a test mule?

heres one of the articles on this beehives

What is the purpose of the copper plating on the cam blank? Isn't it all removed when the cam profile is ground?

Thanks,
Pete Klager
'75 914 1.8L

Honda uses this technique on some of their production camshafts. They gut the lobes and then put them on a five spline shaft. In the case of Jake it would be cheaper to do single blanks from a solid peice.



Beehive springs have a different natural frequency than standard springs, plus the top of the spring is lighter for less valvetrain weight. The only people that are "lofting the valves/lifters are the Prostock boys and NASCAR. It is very hard on valvetrain.

Where can I get one of those clean-up audio versions? I will listen to it...

-Britain

is there any fix or solution for lifter bores that don't measure correctly, oversized after trueing, to accept the lifters?

k

Here's mine

I didn't spend any time cleaning it up, just pushed a couple buttons to flatten out the audio levels so I could listen to it. Could be made way better.

Sorry guys.. My dad is in ICU after some severe blood loss during surgery yesterday. I have limited access to the hospital network

The radio show quality is constantly being worked on- know that.. with the show gaining populairty it deserves to be the best and thats what we'll shoot for.

On the subject of the rollers:
To my knowledge and several of my european friends these have never been available for a Type 4 engine before now. The reason for this is all the work involved and the extreme cost involved, especially before CNC capabilities were readily available... for the first time in a long time I feel like a true development has been made in my shop and for the first time ever, making these part of all my engines takes things to a totally different level, a level that no one else can parallel without some very serious effort.

These are all prototype parts at this point. I have decided to invest in a CNC lathe and a cam grinder to allow us to do these processes 100% in house- I can't aqfford anyone else to work with these components- the risks of them falling into evil hands is just too much.

I'll be back with some results from a 2056 and 2270 test engine in six weeks, both engines are being ran with flat tappets, conventionally and then swapped to rollers and retested directly for comparisons...

I am taking this very, very seriously!

BTW- regarding case work:
I have invested in the necessary tooling to not only check cases for truness, but also to correct case wear and have 3 different OD bushings to retrofit cases for proper sizing. I have about 60 cases that are perfect except for worn lifter bores, this will bring them back to life with a few hours of machine work and the truing plates. These tools are very sexy and VERY expensive and have taken myself, a bitchin machinist and about 200 hours of effort so far to design..

You got that right!!!

Why can't these roller lifters be used with FI?

They could be used with FI.... I have two specific FI cams being ground this week.. One is for plenum based FI, the other for individual runners..

The difference is STOCK FI!! Using these profiles with stock FI would be a total waste of time and money and more than likely with the compromises that would have to be made profile wise the engine would not make any more power than with flat tappets currently. Sticking with stock FI automatically limits what can be done.

There is a huge difference between "FI" and "Stock FI"- I gave up on stock FI damn near 8 years ago..

sorry. last last minute change option. mallory, 6A, baster coil. the SDS LRS-2E? stock plenum. still time to get the cam change to match the lifters, if ness. please lmk.

k