I've opened this thread to see what everybody likes Rubber-wise. (well that came out wrong)

Anyway for AUTO-X iv been using:

Falken Azensis 615 205/50R15 in C stock on stock Fuchs(sp)

But I'm looking to see what others have been succesfull with in:

CS
STS2 (up to 225mm but are the 215s working for anybody?)
SP
MOD

I'm also wondering if you use tire size to "regear" your 914.

Kuhmo V710 205 50 15 in DSP / SM2 on Minilite rims

I like the Kumho V710s and for my street tires I like the Toyo RA1s. I also use those when it rains at the AX and they are amazing.

I don't mean to harp on this but what size?

I'm thinking of going to STS2 until I get some money for the "STICKY STUFF"

As it stands now, I think my 205/50s have lowered my top speed so I'm running out of 2nd gear too early at auto-X.

9" GoodYear R250 on 15x7 Cookie Cutters
Andy


Click to view attachment

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Andy I like the way you keep the rims close to your heart.


I just tryed the RT 615 Flakins and for the price very good rubber. with a four banger I thinks its just enought grip to not bind up the car in tight corners But lets its resr come around nicely. I ran them all day last week at the Streets of Willow and thay never let me down. Only downside is thay are alittle heavy.

did you notice the shotgun shell in the center?
Andy

Oh, sorry, I run 225/ 50 R15s on 15x8 Fuchs.

1st I think the 914 will do very well STS2
Which means you can go to a 7.5 inch rim and 225mm rubber either 15 or 16" dia.
the Hottest tire on the course for street tire class is the Bridgestone RE-01R Followed by the Yokohama Advan Neova Budget tires in that class is the Azenis and then Hankook RS-2 and Kumho MX However most of these tires larger than 205mmsection width will not fit under stock fenders.

I have run lots of tires from Hoosier R3S04 (225/45-15 to RS-2 (225/50-15) all the way up to slicks 22.5 x9.5 x 15 from a formula atlantic car.
Now running some tires from AVON 240/600 R15
The more stick you have the more spring you will need or you will "bind" as you say.

If I were to get mega serious about this I would run 275/35-15 Hoosier A6 and never put more then 30 competition runs on the set before religating them to practice.

Top speed is not what wins autoxes. If you go up in gearing, your 2nd will top out at a higher speed, but your acceleration out of the corners will suffer. And seeing as most autoxes don't give you a lot of long straights, and do give you a whole heck of a lot of turns, I'd go for the shorter tire package. Now... If you want more stick, and not loose gearing, the Hoosier 225/45-15 or the 275/35-15 both have the same effective diameter as the 205/50-15.

If you're going for taller tires in autox, then you really need the torque to back it up...

-Josh2

My experiences mirror Josh's perfectly.have courses that get you

If you have courses that get you topping out 2nd try short shifting to 3rd earlier. Thetorque of a 2.0L will make you faster.

If you really want to up the ante and class rules allow re-gear 3rd to a flipped ZD.

Ran a used set of A6s last season, this year I've got a few autoxs on a fresh set of Avon Tech RAs that I picked up on clearance from Tirerack. Also have a fresh set of V710s as well. All 205/50/15.

I agree with Joe on STS tire RE-01R is top street tire. Hoosier is top DOT R.

I use Goodyear R250 canti slicks on 9.8 lb Jongbloed 15x8 wheels. I can buy used qualifying tires with a couple laps on them for $80 a piece and they last half a season of AX and track events!

I ran Kumho v710's 205/50/15 and 205/50/15's on 15x7 and 8's fuchs last weekend, they stuck very well and I've heard that they will last for awhile.

BTW... What class are the sixes in ('75 2.7 CIS)? I thought that I was in ASP, but someone else told me SM2...

I don't run SCCA but other groups also use their classing, my -6 has always been ASP. It doesn't have many mods, though.

ASP if it's the STOCK 2.0L six. SM2 if it's got any other Porsche made power plant (including any other six, air or water cooled).

-Josh2

Last weekend there was a viper in ASP, kind of hard competition for a 2.0 six. Especially considering that the 2.0 4cyl is only like 10hp less and is in DSP.

I know this sounds like a pointless exercise, but... write a letter.

No, really. It's terribly obvious that the six shouldn't be in ASP, but until the SCCA gets letters from people asking for reclassification, it'll remain in ASP because they've got a cr*p load of other cars to worry about that have far more people driving them.

There are very few actual 914-6's out there (compared to BMW M3s, Vettes, Civics, Miatas etc.), and even fewer that still have an original unmolested 2.0L motor in them. So it's no so much that they have deliberately classed the six against the latest and greatest ubercars, it's just that it's soooo not on their radar, that they've left in in the same class it was originally placed in back in the 80's...

Really, write a letter. Pick a few cars today that you can compare the car to. Use things like weight, power, torque as basics for comparison. I would tend to say that the 2.0L six might be able to better find a home in CSP, against the miatas of today (no small task, let me tell you). At least then, it's in a class with similar cars...

Just saying that the six has only 10 hp more than four won't work though. That's in stock form, and SP gives a lot more capabilities to some cars under the allowances. If a 2.0L six was given unlimited intake and exhaust modifications (as is allowed in SP), I think the gap between the 2.0L four and the 2.0L six would be a bit wider...

Just my $0.12 (inflation ya know...)

-Josh2

You now see the reason Betty and I don't run SCCA AX any more. 914s were successful in SCCA autocross for years, then they got legislated out of competitiveness.

Candy ass.

Running without the day before's practice, Brit finished 14 OA at our last SCCA AX.
Bout 120 cars ran.

Results:

-----------------------------------------------------------------------------
1m AM 17 Ryan Otis 08 LRC 58.303
2m PCSP 190 Ron Bauer 07 Mazda MX5 60.046
3m PSM2 160 LJ Moffet 01 Corvette Z06 60.232
4m PFM 83 Sheldon Lemoine 90 KBS MKV 60.911
5m PCSP 90 Jim Daniels 07 Mazda MX5 61.269
6m AM 7 Neal Stanley 06 LRC 61.388
7m PSM2 60 Scotty B White 01 Corvette Z06 61.406
8m PFM 183 Ernest Fanthorpe 90 KBS MKV 61.463
9m RASP 59 Mark Snell 06 Lotus Exige 61.621
10m PBSP 97 Doug Skinner 73 Porsche 911 61.777
11m PSS 11 Kevin Dietz 04 Corvette Z06 62.081
12m FRUN 90 Tami Daniels 07 Mazda MX-5 62.120
13m PCSP 83 Jack Yeung 07 Mazda MX5 62.289
14m EM 41 Britain Smith 74 Porsche 914 62.419
15m WCSP 90 Tami Daniels 07 Mazda MX5 62.904
16m RSS 111 Ming Yip 06 Lotus Elise 62.932
17m PES 95 Jerry Jenkins 94 Mazda Miata 62.968
18m WSM2 60 Angela Moffet 01 Corvette Z06 62.972
19m FRUN 998 Geoff Clark 03 Mitsu Evo 63.028
20m SS 8 Denis Cornforth 08 Corvette Z06 63.063
21m PSM2 124 Enrique Garcia 99 Mazda Miata 63.112
22m SS 181 Jerry Lee 04 Corvette Z06 63.150
23m RSM 75 Don Nimi 91 Nissan 240SX 63.385
24m SM2 9 Bob Bundy 90 Mazda Miata 63.496
25m STU 21 Geoff Clark 03 Mitsu Evo 63.642

Most all these cars practiced on the day before on the same course run backwards.

Do you guys think that its fair that all other 914-6's run in SM2?

Last weekend most SM2 cars were about 4-5 second faster than I was, but they are alot more seasoned than me...I think with carbs I would have been alot more competitive.

Not to be blunt, but... RTR.

The way the rules are written is that if you have a motor in the car that the car was not originally offered with. You automatically move to front of the class. Doesn't matter that you did a mild engine swap, an engine swap is an engine swap. Any 914-6 that isn't running the stock 2.0L six motor will find itself in with the trailer-riding-fire-breathing-monsters. Because if you made the investment to swap an entire engine, you obviously could have also made the investment elsewhere too. SM2, FP, XP, DM, EM are all places a 914 can play right now with a non-factory engine. Greg Fordhal's amazing 914-6 is a work of art (and a small fortune at that), and is still competitive to this day!

It's the slippery slope issue. If you allow one seemingly mild mod on one car, that same allowance could open the door for significant advantages on other cars. Unlike PCA classing, that only has to deal with one make of car, SCCA has to incorporate ALL of them. Some cars will be better classed than others, some will better be able to exploit the rules in a given class. That's actually something I really like about the SCCA, not only are you competing against all makes and models, but you really need to think about what you can do within the rules to improve your car. The SCCA rules are FAAAR from ideal, but I think given that they have so many makes and models to have to deal with, and so many places for pretty much any car under the sun to compete in, they do a pretty good job overall. Don't get me started on specifics though...

-Josh2

Factory 4-bolt fuchs with 205-50-15 RA1s. Its more fun to beat the "hoosier" crowd on these

14" Fuchs with Yokohama AVS ES100's 205/60HR14. I am always the slowest. Terrible driver on crappy tires. Sometimes my shadow beats me to the timer.

V710s 205/50R15s on 7x15 cookies Front 225/50R15s on 7x15 rears. Fronts fit perfectly under sock fenders. Rears are under puled flares and spacers to keep them from rubbing on the inner fender. I run no spacers up front, and 1" per side out back.

I used to run 205/50s R15s on 6.5" Minilites, required a 1/4 spacer out back.

Those AVS's I use as street tires, yes they do suck, looking at replacing them with Nittos so I can run to the events and if it rains I have something that moves water.

Why not run 225's in the front? I normally get understeer as it is.

Do the cookie cutters require that you run a spacer in the rear? I have 15x8 fuchs in the rear now and they fit w/o any spacers...I guess the two rims have different back spacing.

205s are what I had evil bay deal, to cheap to pass up. Buy one get 3 free deal. No understeer for me. I can induce oversteer at will, pretty much, on these courses. They are high speed so you can use your momentum in the tight stuff to kick the rear out. Go in hard, turn, lift, smash the throttle. This technique can also produce nice spins, with cones flying every wear if you get it wrong.

I have found each 914 slightly different, mine had the chassis stiffing kit welded in back in the early 80s. So take 14 gauges of space plus weld beads out and there you have the issue. I get inner sidewall rub out back on long wide sweepers. And the local clubs loves them so I go better safe than sorry. So the fenders got pulled, and now I run with minimum 1" per side. Cheap insurance against a black flag for smoking. Unless I run PCA, I am usually the only air-cooled Porsche in the field. So them water pumper guys A - think we all leak oil, and B. that smoke out of the back end of my car is oil smoke. Wave the flag Kills to many good runs!!!

Once these 710s wear out, I might go to slicks still have my eyes on the Hanooks. But in reality it is what ever I get a deal on that day, I am paying the $$$ out.