Originally Posted by Michael_D (Post 1582785366)

Wow, I could come up with a couple dozen different scenarios..... What spin rig will you be using?

I would LOVE to see some testing with different rocker options, including rail set ups. The rail systems would obviously require a different modified head, but that data would be quite informative and possibly an option for Katech to sell as a head "upgrade" option. Crower, Jesel, T/D, Comp. The YT bolt on roller tip rockers are also getting a lot of free advertisement on this sight, so I suspect many CF members will be moving to them.

Are the PSI springs beehive? Which series?

Another test that would be interesting is a test with some double taper 1/2" and 5/8" push rods verse stock.

A test with different push rod pre-loads would be cool. One with .100" and one at .050".

A test with OE lifters, one with caddy lifters and one with some light weight / short travel morels.....

Originally Posted by hapnermw (Post 1582785673)

I would second the request to add in a test of Lunati/Morel High RPM Lifters

Originally Posted by RFE-57 (Post 1582785404)

Hi Jason,
Sounds like a great opportunity.....

What is your overall goal for this project?

That may help me/us frame our comments and requests..

Any direct data like this is much appreciated.
B

Originally Posted by 240sx2jz (Post 1582785535)

WWWOOOO!!! excellent, this is going to help a lot of people sleep at night jason. Thanks for doing this, i'm sure the "verified" springs you guys test will sell like hotcakes.

I know valvetrain dynamics are a funny thing, but do you think this testing will show the predicted limits of redline/spring pressures for aggressive cam profiles as well?? If not, could we toss one of the more radical comp grinds in there for another data point??

Really looking forward to the findings, and some high speed footage of what is going on in there with the heavier valves.

Originally Posted by Halltech (Post 1582785889)

The lifters used by Katech are likely superior to the Lunatis. I found something out this week I did not know about them. I'm not sure if this information is for general consumption, but I was very surprised.:eek:

Jason can address this tidbit.

Originally Posted by SmokinZ (Post 1582785342)

Hi Jason, It would be great to also see one other spring that has a heavier seat pressure such as the Manley 221435-16 SBC LS Series. I would be willing to put some dollars towards obtaining a set.

Originally Posted by Katech_Jason (Post 1582785923)

The goal is to answer these questions:
Is it safe to run solid exhaust valves with the stock camshaft?
Is it safe to run solid exhaust valves with your typical aftermarket camshaft?
Does switching to a heavier spring with solid exhaust valves have any negative effects?
What is the limiting speed with heavier valves?

Originally Posted by Katech_Jason (Post 1582784966)

Good news. I have received budget approval to run a valvetrain dynamics test for development purposes to prove out a few of the questions posed here on the forum. Before I write the test plan, I'm interested in hearing input from you guys to see if there are additional combinations that need testing. I'm not saying that every combination posted here will get tested, or any additional at all, but your suggestions will be considered.

We would like to run this test as soon as possible. The valvetrain test cell is currently down due to computer problems, but repairs are in progress that should get it back up and running within days. Because it was down there is a bit of a backup of programs that are waiting for testing so we will have to wait in line, but once it gets fixed that should go through smoothly. In other words, I can't guarantee exactly when, but it will get done soon.

Here is how I see the test plan:
1. Stock cam/springs, stock valves
2. Stock cam/springs, solid stainless exhaust valve
3. Stock cam/dual springs, solid stainless exhaust valve
4. Torquer cam/PSI springs, stock valves (already tested long ago, but we will baseline again)
5. Torquer cam/PSI springs, solid stainless exhaust valves
6. Torquer cam/dual springs, solid stainless exhaust valves
7. Torquer cam/PSI springs, Ti exhaust valve

The Torquer cam will be an example of your typical aftermarket cam lobe profile.

If there is any vendor out there who wishes to have their combination tested we would be happy to include it in the mix for just the cost of running the additional combinations.


Input is encouraged.

Originally Posted by Random84 (Post 1582786050)

:iagree:

Running a heavier spring (specifically with the heavier solid stem valves) is one of the BIG focal points here on the forum.

I also would be willing to chip in a few bucks if necessary. As far as the specific springs, I'll defer to others but I would suggest the current WCCH offering given their popularity here on the forum.

and THANK YOU KATECH for continuing to go above and beyond while contributing to our community (in spite of some of the out-of-line commentary that inevitably occurs in internent forums).

:cheers:

Originally Posted by mistermog (Post 1582786290)

Jason, I have to say... thank you. :) Couldnt have been better timed!

I don't know how long this plan has been in the works but great, im actually excited here, its like christmas again.

I see you testing your Ti valves with the torquer, any value added to testing them on the stock cam, or would it be too much like the stock valves to be worth the effort?

Originally Posted by mistermog (Post 1582786617)

By the way Jason, are the PSI springs you will be using the ones you sell for the Torquer cam, beehives?

Originally Posted by Katech_Jason (Post 1582784966)

The goal is to answer these questions:
Is it safe to run solid exhaust valves with the stock camshaft?
Is it safe to run solid exhaust valves with your typical aftermarket camshaft?
Does switching to a heavier spring with solid exhaust valves have any negative effects?
What is the limiting speed with heavier valves?

Originally Posted by Rock36 (Post 1582786720)

I hope some other vendors actually step and ask for their combos to be tested.

As far as the duals valvesprings go, and aside from what I mentioned earlier, I would nominate either: 1) Manley NextTek 22143 springs 2) Brian Tooley Racing Platinum Duals 3) The Lingenfelter LSX dual valve springs for the test.

I'd also be interested in the install heights for any of the aftermarket duals selected for the test.

Finally, in regard to the portion in bold, I would like to know where Katech would recommend placing red lines based on results. For example, if a valve loses control at 7200 rpm, perhaps you would suggest a safety of 500 rpm and a new redline of 6700 rpm. Just an example of course. That way folks who still want to use SS valves can go in and limit redline and fuel cutoff via tunes if they so chose.