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View Full Version : FFR PDG GTM Racing at Button Willow 10/8/2022



crash
10-04-2022, 02:50 PM
We are racing a 4.5 hour endurance race this weekend.

It has been a tough season for us. Let me recap and maybe answer some people's questions as to why we have not raced more this year.

Here is a recap of the season so far...

Feb 12th Willow Springs 2.5 hour. Had a brake issue mid way through the race. Got that fixed but finished almost last because of time lost in the paddock.

March 26th Auto Club Speedway (Fontana) 3 hour. Dry sump pump failed at hour 2. Finished almost last.

June 11th Auto Club Speedway 4 hour. I did not want to risk the engine that lost the dry sump pump so I put in a new crate engine. Was dynoing that engine on a chassis dyno the day before the race and the #7 and #8 pistons decided they did not want to play nice. Blew engine on dyno. Later found out that GM has had a lot of issues with crate engines lately. This had the number plate indicating it was one in the bad batch.

July 29th Utah 6 hour. I tried to get another crate engine that was not part of the bad batch, but after getting mixed feedback about what would be a "good" engine and what would not be (I still don't know for sure) I decided to just bite the bullet and ordered a Katech long block. Could not make this race.

September 19th Laguna Seca 6.5 hour. I ALMOST got everything done for this race. That was the plan as there were actually three races that weekend. A USTCC event combined with Indy Car, the NASA National Championships, and then the 6.5 hour race the day after the Championships. We wanted to run in ALL of those. The car was ready but I could not get the required chassis dyno time to verify everything was working properly. As this new engine is not a crate engine and the costs involved are significant, I opted to wait, miss that weekend, and get a dyno session in before running it on track. This was really a downer for me and the team as this was likely a once in a lifetime triple race weekend. Very tough decision.

That brings us to this weekend. I did get the dyno session in and it was a good thing I waited as there was significant tuning to be done.
The new engine was not just a new engine but pretty much everything from the firewall back that relates to the engine has been replaced. Cooling system, oiling system, wiring, and fuel system. We are talking serious performance upgrades here.

This weekend will be the big test to see if there is even a chance that we run the 25 hour race this year.

If anyone is interested in joining us at Button Willow the first warm up session on saturday is 8AM. Race starts at 4:30PM and will end at 9PM

Of course, I will post results early next week.

Ajzride
10-04-2022, 04:46 PM
Did you mean 10/8/2022?

beeman
10-04-2022, 05:25 PM
Sorry about the luck this year. How do the Katech specs compare to your previous engine... Displacement, HP, Tq?

Shoeless
10-04-2022, 06:34 PM
Dang, I hate to hear all the struggles, let’s hope this new engine combination is just the ticket you guys need.

Would also like to hear some specs on the setup?

crash
10-05-2022, 11:07 AM
Did you mean 10/8/2022?

Thanks. Updated.

crash
10-05-2022, 11:16 AM
Sorry about the luck this year. How do the Katech specs compare to your previous engine... Displacement, HP, Tq?

After a long talk with numerous people about performance specs, lead times, and expense I decided that the LS3 based Katech would be a better option than an LS7. Essentially we got a bullet proof bottom end, equal to or maybe even a little better performance(especially in fuel mileage) to the LS7, and at a reduced cost over the LS7. Katech engines are not cheap, but when you consider these factors, along with the issue of delivery times, it really was a question that answered itself. In other words, we really had no alternative choice once the important questions were asked. And the numbers did not disappoint. I had asked for area under the curve for torque and we have plenty of that. HP is not that high as the party is over at a relatively low 6000 rpm. We asked for big torque and Katech delivered. Dyno sessions prove this, but now we need to get some track time and see how this translates...or doesn't...to lap times. I'll report back next week. Hopefully our tire bill increases!

crash
10-10-2022, 11:15 AM
The Good...

Engine ran great. All the changes seemed to work as intended. Lots of power and translated into good lap times. Qualified 4th behind two carbon tub prototype cars and a GT4 Porsche. There was a 370Z that was leading the race for some time and I have to wonder how it was as fast as it was.

The Bad...

Had a bolt come out on the shift linkage after 1 hour of the race. We were leading our class and third overall. Once the car came in and I saw what it was it would be an easy fix.

The Ugly...

The gear box was stuck in 4th gear but with our track position I wanted to have the car make a couple of laps while I gathered the required hardware. Upon trying to leave the pits in fourth gear I instructed the driver to slip the clutch to get going as we pushed it as fast as we could. He ended up dumping the clutch and it torqued the serpentine belt tensioner, which then broke off the water pump and cracked the pump housing and the water came out of the cooling system. No way to fix this but to pull the engine and replace the water pump so we were finished at that point. Small bolt problem became a big problem.

The Really Ugly...

Just after we pitted the super fast 370Z race leader pitted and during fueling caught on fire. It was a really bad fire. I don't think anyone was hurt, but the car was burned from the windshield back and completely gutted. That was a beautifully built car. A real shame.

beeman
10-10-2022, 12:03 PM
Sorry to hear that, dang bolt! I believe you are running a rod shifter?
I agree with the ??? 370z leading prototypes ??? I had a 350z back in the day, it was just OK...heavy and so-so power...
Good to hear the Katech held up but no surprises there...

crash
10-10-2022, 12:49 PM
Sorry to hear that, dang bolt! I believe you are running a rod shifter?
I agree with the ??? 370z leading prototypes ??? I had a 350z back in the day, it was just OK...heavy and so-so power...
Good to hear the Katech held up but no surprises there...

This is a critical bolt and the only NAS bolt on the car. I use plenty of AN bolts, but this bolt was in single shear and it is, obviously, a single bolt that holds the shift linkage to the shift mechanism on the transaxle. I am not 100% sure what happened, but the bolt has clearance issues on the rear to the housing of the transaxle and so must be the right sized bolt. Not long, but not short with a relatively tight length tolerance. Because of the new 4 stage dry sump pump I had to move the shift linkage approximately 1.5 inches out from the side of the engine/gearbox. In doing this the angle for the final link that uses the NAS bolt increased. It increased to the point that it caused the last rod end to bind on the shift mechanism on the transaxle. To deal with this, at least temporarily for this race, I shimmed out the rod end so that it cleared the mechanism. I had a choice to make to either put a longer bolt in that was not NAS or use the NAS with a couple less threads engaged. I chose the later. It also used an all metal lock nut but it is possible that the extra washer caused not all of the lock nut to be engaged. Anyway, that is the long answer and the detailed potential reason for the issue. I don't think it sheared that bolt. Bottom line is that it is a relatively easy fix that was already on the list before this race. I just have to mail order the NAS hardware and there was no time before this event. Given the literally hundreds of changes, this is a pretty minor, or should have been a pretty minor, issue. Things are so tight on this car it is almost unbelievable.

Shoeless
10-12-2022, 11:01 AM
I can imagine with all the large changes there would be little things that crop up in the mix.

Thanks for posting the updates, and sad to hear about the 370z.

crash
10-17-2022, 02:13 PM
Here's a link to the in car video of the fire...

https://fb.watch/g9dYNAj-uM/