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Rodan
Rodan UberDork
12/25/24 8:04 a.m.

In reply to adam525i :

The M54B30 was my first thought, actually.  S52 power levels, aluminum block, cheaper...  but requires all the extra work that an S54 would.

After doing the research and thinking about it quite a bit, the S52 is just a lot less work.  I don't really want another long, involved swap project right now.  And the S52 has that 'X' factor of the factory E36 M Touring that could have been, but never was...

We'll see... it's all just BSing until I actually buy an engine. wink

Too many posts without pics, so here's a random Touring pic...

 

Merry Christmas everyone!

 

docwyte
docwyte UltimaDork
12/25/24 10:09 a.m.

In reply to adam525i :

I made 240 hp to the wheels on my last S52 with just simple bolt ons.   Intake, tune, euro headers, cats and an exhaust.

Rodan
Rodan UberDork
12/25/24 10:57 a.m.
docwyte said:

I made 240 hp to the wheels on my last S52 with just simple bolt ons.   Intake, tune, euro headers, cats and an exhaust.

And I'm not really looking for more than that... 

Rodan
Rodan UberDork
1/5/25 5:15 p.m.

Nice day yesterday at Podium Club in Casa Grande with PCA AZ.  First time running the track CW, and my wife's first time there. 

More later, but here's the fast lap of the day....

 

Rodan
Rodan UberDork
1/6/25 8:48 a.m.

We couldn't have asked for better weather, and although in the high 30's when we rolled into the pits before dawn, it warmed up quick and the high for the day was ~70*F.



We've always enjoyed running with the Porsche Club, and although they can be a little anal about some stuff, they run a good event.  My wife runs in the DE2 group and I run in DE3 or 4 depending on the schedule so we can avoid back to back sessions.  This time I was in DE3, and it was a big group, but it only turned out to be a problem in one session.  I had been to Podium Club in November running CCW, but this was my first time running CW.  IMHO the track flows better CW, and isn't quite as hard on the brakes as you come onto the straights from a slower turn and end them with faster turns.  I also really like tracks where straights lead into fast, technical turns.



First things first:  I swapped my brake pads back to R10/R8 and I'm happy with my brakes again.  The R12/R10 combo just had zero feel and no bite.  Maybe I just wasn't getting enough heat in them...??  Anyway, the R10/8 combo has great bite, great feel, easy modulation and no fade.  Running this track CW is not as punishing on the brakes as CCW, but I had no issues so I'm sticking with R10/8 for now.  One of these days I'll give G-Loc a call and see what they have to say about these two pad combos...

I started the day on Kumho V730s.  The first session was pretty slidey with temps starting out in the low 50s.  Best lap was a 1:47.5, which I considered a good start, with my goal being mid - 45s.  Traffic wasn't bad, but there were several spins, and a bunch of dirt got strewn on the track in the esses.  It became apparent pretty quickly that there were 3-4 of us that had considerably more pace than the rest of the group... me and 3 Caymans, 2 of them GT4s.  The P cars had more on the straights, but I had the advantage in the corners.   I also found out my Sim practice had my gearing expectations way off...  I was going through most corners a gear higher than I had on the Sim.  Sim practice is a good thing, but it's not always perfect.

Second session, the track was warming up, and once traffic sorted itself out I started working on making time.  Everything was coming together and I came off with a best lap at 1:46.02... at least I thought I did.  I was checking 'best lap' on my dash, and not downloading data between sessions.  Apparently I didn't look after my last 'hot' lap, because I discovered I had run a 1:45.61 after I downloaded data at home.  Still, I was happy with the :46 at the time, and the car was running great.

I swapped to Toyo RRs for the third session.  I figured they should be good for a bit more than the V730s.  Unfortunately, everything went to hell in the third session... traffic. 



I noted above that PCA can be a bit anal... one of those things is point-bys are required to pass in every group.  It's not a problem, 'till you get 'that guy'.  I got stuck behind a GT4 coming out of the grid, and he was 3-4 seconds slower, but of course faster on the straight.   He would pull on the straight, and then I'd be on his bumper for the next corner....  shiny happy person would not point me by... 

End of the back straight...


Top of the Esses...


I kept thinking of this... 


After a few laps, we had a gap behind us, so I gave him almost the full length of the straight to try to get a lap without catching him.  But we caught slow traffic, and it was a conga line from there so I pulled off.  Best for the session was a 1:48.  Normally I would pull through the hot pit in this situation, but they way they were set up, you had to come off track, go all they way back into grid, and then back out... no straight through hot pit, so I'd lose at least 2-3 minutes of the session.  Fortunately, D-bag put his car on the trailer after that session...

I managed to grid up to be first out for the final session...  and never saw anyone in my mirrors.  Only had to pass one car, the NB in the video above, and he was courteous.  The RRs definitely felt better, and inspired more confidence in several places on track.  Came in with a best of 1:45.1... should have been ~ 44.8, but I screwed up the end of the esses.  I pushed my braking point a little too far at the end of the straight on the next lap and ended up running off to avoid a spin and decided that was enough for the day.  

All in all, a very good day.  I'm happy with the results, and got some good data to compare the V730 and RRs.  I really think I could have hit .44s if I'd had some clear laps in the 3rd session and that's a bit irritating, but what can you do?

Data download coming...

Rodan
Rodan UberDork
1/9/25 4:58 p.m.

Spent a few days digging through the data, and I'm not seeing much in the way of surprises.  Temps and pressures are good all 'round.  IATs are consistently right at ambient.

I did note about a 3 mph drop in terminal speeds on the front straight as the temps rose throughout the day, with max speeds dropping from 122 to 119 over a 15*F rise in temps.  

I was able to get a good look at comparing Kumho V730 to Toyo RR...  The Toyos felt like they had a lot more grip, and inspired more confidence all they way through the corner.  The objective difference in grip was actually pretty small, but noticeable on the data trace.  The result was more speed in the corners, and a better lap time.  This screen shot shows T3 with the red trace being Toyos (1:45.1) and the blue trace Kumhos (1:45.6).  I actually screwed up the esses pretty significantly on the Toyo lap, which would likely have been ~1:44.6 if I'd got it right.



I'm just starting to get a handle on using data, and being able to correlate what I'm seeing with what I was doing and feeling on track.  The next step is to start pulling data between sessions, and try to apply what I'm seeing to the next session.

Rodan
Rodan UberDork
1/10/25 4:22 p.m.

Credit to Clay Lyons @shopclassagency... didn't even know he was taking pics in the paddock until later.

Here's some old fart looking at his dash while the car warms up in the pre-dawn, 35*F paddock...

On grid

Rodan
Rodan UberDork
1/11/25 9:44 a.m.

Moar pics...

Rodan
Rodan UberDork
1/15/25 11:55 a.m.

The new Hotness has arrived...  Nankang CR-S V2




Rodan
Rodan UberDork
1/15/25 3:59 p.m.

Going from 225s on 9s (Toyo RR on 6UL) to 245s on 9.5s (CR-S on 6UL) will add almost 4lbs per corner, and some drag/rolling resistance. Hopefully the grip will overcome, but that's why I held off on 245s prior to the K swap.

225 on 9


245 on 9.5


Some pics on the car... 245s are wide! Car is probably sitting a bit high... just jacked it up and bolted on the wheels... didn't drive it. Flat fender roll, no pull.




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