+- Madison Motorsports (https://forum.mmsports.org)
+-- Forum: Technical (https://forum.mmsports.org/forumdisplay.php?fid=4)
+--- Forum: Member's Projects (https://forum.mmsports.org/forumdisplay.php?fid=12)
+--- Thread: Das Race: My '97 M3/4/5 (/showthread.php?tid=10430)
RE: Das Race: My '97 M3/4/5 - JPolen01 - 03-27-2018
Does VIR really not have one snow plow?
RE: Das Race: My '97 M3/4/5 - .RJ - 03-27-2018
Yeah, you floated and bent a valve(s). Got lucky.
Das Race: My '97 M3/4/5 - rherold9 - 03-27-2018
Sorry to hear about the engine. Hopefully it will just need a simple fix and you'll be ready and out there for the April event in no time!
Sent from my Pixel using Tapatalk
RE: Das Race: My '97 M3/4/5 - Deceus - 03-27-2018
I remember doing something similar in the Challenger. Went to grab 4th and ended up pulling it back down into second with the pedal to the floor and fortunately the engine just said nope and basically cut off. Was lucky that I didn't blow that thing up and that it was on an empty highway. I really need to throw in a rev-limiter on the Demon because I've been told many times that small block Mopars will float the valves pretty quick. The bright side is that it always nice getting a good look at the pistons and cylinder walls, so you'll have some decent peace of mind once it's back together.
RE: Das Race: My '97 M3/4/5 - Jake - 03-27-2018
(03-27-2018, 09:51 AM)JPolen01 Wrote: Does VIR really not have one snow plow?
They were working to clear the snow, yes - but it's hard to plow over all the curbing and so on. Having a bunch of people drive around "off line" to help kick the slush off the track sped up the process a bit. And, due to the fog we couldn't run at speed anyway, so no harm in having a few people getting track time in their pickups.
RE: Das Race: My '97 M3/4/5 - Senor_Taylor - 03-27-2018
(03-27-2018, 09:54 AM).RJ Wrote: Yeah, you floated and bent a valve(s). Got lucky.When I hear bent valve, I think valve contacting piston.
In this scenario, is it actually the stem of the valve bending due to it separating from. The lifter/cam Lobe and smacking into it when the spring finally pulls it back up?
Sent from my Pixel using Tapatalk
RE: Das Race: My '97 M3/4/5 - ScottyB - 03-27-2018
(03-27-2018, 01:40 PM)Senor_Taylor Wrote: In this scenario, is it actually the stem of the valve bending due to it separating from. The lifter/cam Lobe and smacking into it when the spring finally pulls it back up?
correct. the piston is moving so fast the valve can't get back out of the way in time because the valve spring is not strong enough to handle the inertia of a valve moving at that speed.
RE: Das Race: My '97 M3/4/5 - D_Eclipse9916 - 03-27-2018
(03-27-2018, 01:40 PM)Senor_Taylor Wrote:(03-27-2018, 09:54 AM).RJ Wrote: Yeah, you floated and bent a valve(s). Got lucky.When I hear bent valve, I think valve contacting piston.
In this scenario, is it actually the stem of the valve bending due to it separating from. The lifter/cam Lobe and smacking into it when the spring finally pulls it back up?
Sent from my Pixel using Tapatalk
It bends the stem because the valve contacts the piston, not because of any spring force pulling it back up.
Das Race: My '97 M3/4/5 - Senor_Taylor - 03-27-2018
That's what I thought. Just seems to me that would mess up the piston as well, which doesn't seem to be a concern?
Sent from my Pixel using Tapatalk
RE: Das Race: My '97 M3/4/5 - D_Eclipse9916 - 03-27-2018
(03-27-2018, 02:44 PM)Senor_Taylor Wrote: That's what I thought. Just seems to me that would mess up the piston as well, which doesn't seem to be a concern?
Sent from my Pixel using Tapatalk
Most of the time a light tap will just be cosmetic on the piston, but sometimes it can destroy the piston if its a hard enough hit.
RE: Das Race: My '97 M3/4/5 - ScottyB - 03-27-2018
(03-27-2018, 02:44 PM)Senor_Taylor Wrote: That's what I thought. Just seems to me that would mess up the piston as well, which doesn't seem to be a concern?
it does usually leave a tiny crescent mark on the piston top, but its usually not enough to actually affect compression or combustion swirl. sometimes you can even sand it out if the contact is light enough
![[Image: 192596d1250292799-piston-valve-contact-m...re-001.jpg]](https://ls1tech.com/forums/attachments/forced-induction/192596d1250292799-piston-valve-contact-my-pistons-trash-now-picture-001.jpg)
RE: Das Race: My '97 M3/4/5 - .RJ - 03-27-2018
what they said. been there done that.
Das Race: My '97 M3/4/5 - Senor_Taylor - 03-27-2018
Neato. Thanks for the information. Always assumed it was more catastrophic than that. I guess catastrophic is dropping a valve and having it jangle around in there.
Sent from my Pixel using Tapatalk
RE: Das Race: My '97 M3/4/5 - D_Eclipse9916 - 03-27-2018
(03-27-2018, 03:11 PM)Senor_Taylor Wrote: Neato. Thanks for the information. Always assumed it was more catastrophic than that. I guess catastrophic is dropping a valve and having it jangle around in there.
Sent from my Pixel using Tapatalk
From Slighty Catastrophic to REAL catastrophic
Hard tap destroying piston when a valve dropped, not even during a shift, random failure:
![[Image: 11412335_10102454050909179_4835860329081...e=5B6F076B]](https://scontent-iad3-1.xx.fbcdn.net/v/t1.0-9/11412335_10102454050909179_4835860329081364206_n.jpg?_nc_cat=0&oh=63fec855ab28d9c824286df72bddfc4d&oe=5B6F076B)
![[Image: 11247902_10102453739238769_7703746299626...e=5B40662C]](https://scontent-iad3-1.xx.fbcdn.net/v/t1.0-0/p206x206/11247902_10102453739238769_7703746299626838416_n.jpg?_nc_cat=0&oh=28def285dc4157df71b77c6eb18d3757&oe=5B40662C)
And then REAL catastrophic damage, rod through the block (LS1/M3 lost a rod bolt at T6 around Summit Point):
![[Image: 10981683_10102301677786139_2805001279339...e=5B434492]](https://scontent-iad3-1.xx.fbcdn.net/v/t1.0-9/10981683_10102301677786139_2805001279339801111_n.jpg?_nc_cat=0&oh=98be8f861d5bb4d343962d326bb74bc2&oe=5B434492)
![[Image: 10420265_10102301677676359_7499512347996...e=5B443678]](https://scontent-iad3-1.xx.fbcdn.net/v/t1.0-9/10420265_10102301677676359_7499512347996220982_n.jpg?_nc_cat=0&oh=96bf4ac2b0efa1a140243991162aa51e&oe=5B443678)
![[Image: 11096533_10102301677751209_2522532776234...e=5B348CB1]](https://scontent-iad3-1.xx.fbcdn.net/v/t1.0-9/11096533_10102301677751209_2522532776234978804_n.jpg?_nc_cat=0&oh=cd7185716c8446cf024abafbe34b2252&oe=5B348CB1)
RE: Das Race: My '97 M3/4/5 - Jake - 04-04-2018
![[Image: yongMzq.png]](https://i.imgur.com/yongMzq.png)
Got this from Deren on Monday evening and he was going to start tearing into the car yesterday. Going to be a spendy shop bill when it's all said and done. Not sure when that'll be but he said "before Summit Point" so that's a good thing. RIP Visa.
Das Race: My '97 M3/4/5 - Senor_Taylor - 04-04-2018
Is this an opportunity to upgrade/repair anything else?
Sent from my Pixel using Tapatalk
RE: Das Race: My '97 M3/4/5 - .RJ - 04-04-2018
(04-04-2018, 11:25 AM)Senor_Taylor Wrote: Is this an opportunity to upgrade/repair anything else?
Sent from my Pixel using Tapatalk
I think while the head is off, its only reasonable to install a supercharger.
RE: Das Race: My '97 M3/4/5 - *insertusernamehere* - 04-04-2018
(04-04-2018, 11:56 AM).RJ Wrote:+1(04-04-2018, 11:25 AM)Senor_Taylor Wrote: Is this an opportunity to upgrade/repair anything else?
Sent from my Pixel using Tapatalk
I think while the head is off, its only reasonable to install a supercharger.
Sent from my FRD-L04 using Tapatalk
RE: Das Race: My '97 M3/4/5 - Jake - 05-07-2018
April 2018 - Spring Rumble at Summit Point
Looks like I forgot to post an update after the April event at Summit Point, so here's a brief recap before we head to Hyperfest.
Deren had worked tirelessly, tearing apart my poor S52 and getting the head over to the machine shop. The machine shop discovered I had bent every exhaust valve in my exuberant sprint up the back straightaway, and between the two shops, the car was back together in the nick of time – literally. Bralley and I loaded the car in the trailer at 11:30 PM on Friday, leaving Mach V with Summit Point Raceway in the truck’s navigation system.
![[Image: HrNZI7g.jpg]](https://i.imgur.com/HrNZI7g.jpg)
The weather was sublime all weekend, with highs in the 60s and clear skies. Every race weekend should have such perfect conditions! My goals for the weekend were to learn the new suspension, and to cut down time as a result. I’ve never been incredibly fast at Summit Point, and the track has bitten me once before, so building more confidence was to be a benefit of the weekend. Thankfully, the weekend delivered in those aspects.
Qualifying on Saturday was solid, with a fourth-place qualifying time of 1:26.431. We had a group of nine racing in GTS2, so I felt confident in my qualifying time. The race saw me drop a few positions, but I held my own and finished sixth.
The new MCS shocks, combined with higher spring rates and a fatter front sway bar, give the car a wild amount of grip compared to my old Ground Control setup. The new setup provides that grip, but it also means that as a driver, I have to brake later and be even more confident to pitch the car through a corner and know it will stick. That confidence is still building, but grew overnight and I qualified with a 1:24.485. Two seconds off my personal best at Summit Point – a huge drop that made me very happy in itself!
![[Image: 0VReHmc.jpg]](https://i.imgur.com/0VReHmc.jpg)
GTS2 as a field seemed to grow in confidence, and that 1:24 was good for a fifth place spot on the grid on Sunday. We took the green flag and unfortunately, only a lap or two in, DJ suffered a severe lack of traction due to leaking fuel, and ended up in the tires at T3. Although he is okay and the car is fixable, nobody likes seeing their friend (or anyone) in a wall. The race was halted and all cars brought onto pit road while the emergency crew cleaned up the carnage. We were down for about 15 minutes, then followed the pace car back out for a single-file restart.
Single-file restarts are interesting, because instead of taking a green flag class by class, you line up nose to tail and take the green flag in whatever order you last exited the track. So, there’s no guarantee that you’ll be with your class, depending on how your race was going prior to the black flag. I ended up behind a few GTS2 cars, but had some Mustangs and Thunder Roadsters behind me.
We all took the green flag and began again. It felt like some drivers left their brains behind on the pit road as we got a few laps in to the race. Traffic was incredibly busy and cars were everywhere. I ended up in the middle of a melee several times, and frankly, was just happy to finish the race with straight body panels. The highlight (lowlight?) was a few laps in, where a Thunder Roadster passed me and two Mustangs in the Carousel. I ended up next to the first, black Mustang. The NASA Club Codes & Regulations (CCR) state that if another driver has the nose of their car at your door, you must give them 3/4 of a car width for racing room. I was dead even with the Mustang, and he turned further in to the right as we went through the turn. A quick, hard stab of the brakes on my part allowed me to avoid a collision, but made me fall back behind him and a red Mercury, giving up the ground I had gained in an attempt to catch someone in my class. Thankfully, you can’t be penalized for obscenities yelled in your own car.
Even with the complete “what just happened?” Sunday race, the weekend was a success overall. Shaving two seconds off of a personal best is nothing to sneeze at, and I absolutely found more confidence in the car’s new setup.
No changes to the car for Hyperfest beyond getting the CoolShirt system all plumbed. Cannot wait to have that functional in the heat!
![[Image: wwNNUFo.jpg]](https://i.imgur.com/wwNNUFo.jpg)
![[Image: T6QX0mV.jpg]](https://i.imgur.com/T6QX0mV.jpg)
![[Image: 0w2QLki.jpg]](https://i.imgur.com/0w2QLki.jpg)
RE: Das Race: My '97 M3/4/5 - Deceus - 05-08-2018
Nice, glad to see that it got up and running in time. How bad did the pistons look? I'm lucky my motor isn't an interference setup otherwise I would have been dealing with the same issue on the runstand when my timing chain was installed wrong.