anyone put a m97 or mA1 in a 986?

[Topless]

To run effectively in SCCA street prepared I expect it would be both simpler and less $$ to start with a Cay S platform rather than try to swap a mA1 3.4 into an older 986. The DME nightmare is very real.

[autodoctor911]

Originally Posted by Topless

To run effectively in SCCA street prepared I expect it would be both simpler and less $$ to start with a Cay S platform rather than try to swap a mA1 3.4 into an older 986. The DME nightmare is very real.

cheaper??? to buy a 2009 Cayman S???

what about the Siemens dme is a nightmare? is it hard to crackthe software?
hard to find hardware to reflash?

[Topless]

Originally Posted by autodoctor911

cheaper??? to buy a 2009 Cayman S???
2009 Cay S... maybe not. 2006 Cay S... very likely
what about the Siemens dme is a nightmare? is it hard to crackthe software?
hard to find hardware to reflash?

As I understand it the 987.2 DME won't shake hands with a 986 chassis. I know of no one who has resolved this yet. Todd Holyoak has spent more time inside the Porsche DME than anyone I know. Perhaps he will chime in.

I don't see how a 987.2/3.4L motor into a 986 meets the rules of street prepared anyways. Did I miss something?
http://www.moutons.org/sccasolo/Rules/sp.html

[Cloudsurfer]

Originally Posted by Topless

As I understand it the 987.2 DME won't shake hands with a 986 chassis. I know of no one who has resolved this yet. Todd Holyoak has spent more time inside the Porsche DME than anyone I know. Perhaps he will chime in.

I don't see how a 987.2/3.4L motor into a 986 meets the rules of street prepared anyways. Did I miss something?
http://www.moutons.org/sccasolo/Rules/sp.html

Todd and I have talked about this and I think the consensus is that it's just not worth trying.

[autodoctor911]

according to scca street prepared rules engines, and or transaxles may be exchanged between a 2.5 boxster and a cayman S per section 15.1C:


C. Equipment and/or specifi cations may be exchanged between different
years and models of a vehicle if (a) the item is standard on the
year/model from which it was taken, and (b) the years/ models are
listed on the same line of Appendix A (Street Prepared Classes). The
updated/backdated part or the part to which it is to be attached may
not be altered, modifi ed, machined or otherwise changed to facilitate
the updating/backdating allowance. Standard factory installation
methods, locations, and confi gurations are allowed. The updating
and/or backdating of engines, transmissions, transaxles, and/or unibodies
must be done as a unit; component parts of these units may
not be interchanged. Cars not listed in the Street Prepared sections
of Appendix A may not be updated/backdated until approved by the
SEB and published in the offi cial SCCA publication.
D. Alternate computer control modules may be used whenever an
equivalent change to the conventional system is allowed. For example,
alternate computer module control of ignition settings or fuel
injection is allowed.
APPENDIX A - AUTOMOBILE CLASSES
...
STREET PREPARED CLASS B (BSP)
....
Porsche
911 (1965-89) (3.2L max, nonturbo)
928
Boxster & Cayman (all)

I actually think this is an oversight, and the 987-2 cars at least will be reclassified into ASP since in stock class they are in SuperStock, where as the 987s is in
A stock and the987 2.7 and 986 S is in B stock, and the lowly 2.7/2.5 986 is in C stock,

[autodoctor911]

I have a 2.5 99 model, and really want to go beyond what stock class allows(not much in scca). I at least want to put gt3 front arms, sway bars, row m030 rear springs, some soft front lowering springs,and headers. but in stock class, I can't even take the snorkel out! but in street prepared I'm up against a 2011 cayman S or spyder, or a solstice GXP or a c4 corvette, or a Dtamaso Pantera!!!

I would really like to see the 2.5/2.7 boxster dropped to CSP, but I am pretty sure that isn't going to happen. there are also a lot of other slower, non competitive cars in this class. I guess, you just have to get a really expensive car to race anything other than stock classes in scca, since they group so many cars together, or get one of the lucky cars that gets grouped into a lower class like CSP,DSP,FSP. actually, I just checked and the non-turbo solstice/sky are in CSP, as well as most other Cstock cars I race against. I don't see why I shouldn't be able to race in CSP with the same types of cars I race against in stock class. would the allowed modifications in street prepared make my boxster gain more of an advantage over these cars than it already has now?

[autodoctor911]

Is it not possible to get by without the functions that the dme needs to talk to other modules for. all I want my ABS to do is keep the brakes from locking up.
if the lights are on for abs, but it still does that, I don't care. can the siemens dme not be programmed to do the bare minimum to run the engine, and ignore everything else?

I certainly would want to at least eliminate AIR and catalyst monitoring. why not eliminate the functions that relate to the other modules? I am not going to be running a tiptronic or a PDK.

bty what do the pro racers use for a dme in gt3 racing? they have no abs, or any other modules on board, related to a street car.

in fact, isn't there a GT3 production model with no ABS? COUld you not use the stock programming for that dme as a starting point?