RX-8 to DSP???
09-07-2012, 04:25 PM
#127
Stuff that might help the RX-8 in SP:
Series 2 diff via UD/BD.
Fender cutting/flaring to fit much wider wheels/tires (obviously a tradeoff with width).
I imagine the cat elimination might open up more engine tuning flexibility b/c EGT will be less of a concern...??
Flywheel/clutch can be lighter/smaller.
Seats don't need to hit a minimum weight.
You could also UD/BD the smaller brakes from the auto model, but I don't know if they're lighter than the other stuff that you can use in STX.
09-07-2012, 04:36 PM
#128
I don't think so. Marc (Zelse)'s car is very quick. Maybe next year he will spend less time at hard-parking photo shoots and more time at national-caliber autocross events 
At the end of the day, top drivers will do well no matter what car you put them in. I think a fully-developed RX-8 will be close enough that it will come down to who is behind the wheel.
At the end of the day, top drivers will do well no matter what car you put them in. I think a fully-developed RX-8 will be close enough that it will come down to who is behind the wheel.
09-09-2012, 06:09 AM
#129
more to it than most people realize
Street Prepared allowances above Street Touring:
Remove A/C components (interior & exterior but heater system must not be modified)
Cut or flair fenders (for 295+ tires)
Any high-back seat (no minimum weight limit)
Any steering wheel (no air bag requirement)
front splitter & rear spoiler aero is allowed, but no aftermarket rear wings (there is an SP aero proposal out in the latest FastTrack to delete or modify the rule)
Stereo/speakers/amps can be removed (wiring must remain, any resulting holes must be covered)
Any single brake master cylinder or brake booster.
A single bolt-on master cylinder brace is allowed.
A brake proportioning valve is allowed.
No limit on rotor cross-drilling surface area
Brake backing plates can be modified or removed. Brake air ducts are allowed as long as the body/structure is not modified
Steering rack bushings can be changed as long as the metal content is equal or less than OEM
Any ignition system or component is allowed
Any oil pan, oil pump, or oil pump pickup is allowed, including an Accu-sump
Fuel injection and intake manifold are unrestricted, including injectors, rails, throttle body, linkage, pressure regulator, etc.
All emission control devices may be modified or removed
Intake water injection is allowed
Any fuel pump(s) is(are) allowed, any fuel line is permitted up to 1/2" ID with one supply line, one return line, and an added fitting is allowed at the top of the fuel tank (allows converting the RX8 non-return system to an external return system with a second pump in the RH saddle to eliminate the siphon pickup configuration)
Any gasoline fuel is permitted (E85 is already allowed)
Any radiator is allowed as long as it uses the OE mounts and is equal or larger in size, fluid capacity, and dry weight than OE (may serve no other purpose such as allow a cold air intake passage, etc.)
Any radiator fan & shroud is permitted (except flex-fans, not applicable)
Any clutch & flywheel is permitted, an alternate slave cylinder/device is permitted (allows conversion from slave/mechanical actuator to full hydraulic direct actuator)
Engine & drivetrain components may be balanced
Intake and exhaust port matching is permitted within 1" of the interface joint
Any aftermarket engine computer is allowed (MoTeC, etc.)
Update/backdate between 2004-2008 and 2009-2011 vehicle components assuming they are listed on the same classing line
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Last edited by TeamRX8; 11-17-2012 at 09:09 AM.
09-13-2012, 09:02 PM
#132
but with the right tuning this would probably suffice to start:
https://www.rx8club.com/rx-8-parts-s...bo-kit-236923/
then upgrade the turbo as you progress
https://www.rx8club.com/rx-8-parts-s...bo-kit-236923/
then upgrade the turbo as you progress
09-19-2012, 10:02 AM
#136
recent BSP results. Unfortunately there was only one car that was registered under DSP this past weekend which was a MS3 (hopefully more DSP show up next year). My local competition isn't that bad aside from the fact that I suck and my numbers are terrible compared to my STX and B Stock bretheren
09-20-2012, 12:18 PM
#138
Sounds like fun... I'm still trying to sell my car, but so far there's been very little (zero) interest. I'm half tempted to move to DSP just to give Zelse some local competition. It's a big financial jump, though. Of course, so are the other options I'm considering for next year.
Decisions, decisions...
Decisions, decisions...
09-20-2012, 09:58 PM
#139
Row faster, I hear banjos
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Looks like not much has changed since I was last on here about 9 months ago.
Still on a sabbatical from autocrossing. Crushing it on the tennis courts. Just one level below a semi-pro now...
09-21-2012, 12:42 AM
#142
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An NA 3 rotor would put you at a 2732 weight limit vs a 2701 weight limit for a turbo 13b. Should be able to get similar power levels and you wouldn't have to deal with boost.
09-21-2012, 10:49 AM
#144
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I thought about going FI on my r3 and then I realized that for the same cost I could just pick up a c6 z06 and up with a faster car that got better mileage, didn't rust, and had more trunk space.
09-21-2012, 04:07 PM
#145
I'd be even more clumsy with a tennis racket than a steering wheel and some pedals ...
an R3 (or any S2) would be a terrible place to start to begin with. An FI 2-rotor engine will cost less and provide great low end power with more than adequate high end power. The only pro for a 3-rotor NA engine is durability. Making sound without killing power is going to be a real struggle too.
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an R3 (or any S2) would be a terrible place to start to begin with. An FI 2-rotor engine will cost less and provide great low end power with more than adequate high end power. The only pro for a 3-rotor NA engine is durability. Making sound without killing power is going to be a real struggle too.
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Last edited by TeamRX8; 09-21-2012 at 04:14 PM.
09-21-2012, 09:45 PM
#146
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It'd be a bad place to start if the end goal is to dominate ssm. It'd be a great place to start if the end goal was to make a quick car a bit quicker. I feel like that goes for any rx8 though.
As far as the NA 3 rotor goes - I think you could have it built and installed for 10k in parts. I don't know that a properly set up rew is going to be any cheaper initially. Peak power wouldn't be as high, but I think that not having to deal with boost lag would make up for it.
Don't know who I'm trying to convince here. It's just something that seems pretty rad to me and I'd love to see it done.
As far as the NA 3 rotor goes - I think you could have it built and installed for 10k in parts. I don't know that a properly set up rew is going to be any cheaper initially. Peak power wouldn't be as high, but I think that not having to deal with boost lag would make up for it.
Don't know who I'm trying to convince here. It's just something that seems pretty rad to me and I'd love to see it done.
Last edited by Litreocola; 09-21-2012 at 10:15 PM.
09-22-2012, 12:27 AM
#147
So here's my list
Lightweight Flywheel
17x10 wheels with some 275/35/17's
Replace the cat with another resonator
Aftermarket steering wheel?
Some new pullies.
That's about what i'm looking at doing IF I decide to do a DSP build..
As far as an OS giken goes...I have not looked into it yet.
Lightweight Flywheel
17x10 wheels with some 275/35/17's
Replace the cat with another resonator
Aftermarket steering wheel?
Some new pullies.
That's about what i'm looking at doing IF I decide to do a DSP build..
As far as an OS giken goes...I have not looked into it yet.
09-22-2012, 07:05 AM
#148
It'd be a bad place to start if the end goal is to dominate ssm. It'd be a great place to start if the end goal was to make a quick car a bit quicker. I feel like that goes for any rx8 though.
As far as the NA 3 rotor goes - I think you could have it built and installed for 10k in parts. I don't know that a properly set up rew is going to be any cheaper initially. Peak power wouldn't be as high, but I think that not having to deal with boost lag would make up for it.
Don't know who I'm trying to convince here. It's just something that seems pretty rad to me and I'd love to see it done.
As far as the NA 3 rotor goes - I think you could have it built and installed for 10k in parts. I don't know that a properly set up rew is going to be any cheaper initially. Peak power wouldn't be as high, but I think that not having to deal with boost lag would make up for it.
Don't know who I'm trying to convince here. It's just something that seems pretty rad to me and I'd love to see it done.
You really have no idea what you're talking about. A 20B Na engine is great at the track because you can always keep it wound up and in the narrow powerband. In an autox scenario you will either chug out of a corner and then be hitting your brakes just when the power is finally starting to climb or to avoid it you'll need a sequential trans and a really short rear gear which by itself will cost more than $10k and row gears like crazy.
Does this look like boost lag to you? Autox FD Dyno - RX7Club.com
Stop being silly. If you want to pursue an SM thread then go start one and demonstrate your expertise there. This is a DSP thread.
09-30-2012, 02:01 AM
#150
well sorry for having been so blunt about it, but you aren't even in the ball park. It is a custom job beyond the engine itself. You will need an aftermarket racing ECU and everything that goes with it including grafting it with the rest of the chassis electronics. You will need to mate it to the drivetrain/PPF, custom header/exhaust, etc., etc.. The list just goes on and on. $10k is a pipe dream and then you will be lucky to get anywhere close to the power goal you stated for that price even if you do everything yourself, not to mention it will be a ton of work requiring a lot of fabrication equipment
20b Engine Build and Conversion Pricing from Vendors - RX7Club.com
20B NA update - dyno results (LONG) - RX7Club.com
I had this idea several years ago and after researching it out the it was quickly scrapped. No way will it compare in price, effort, and end result over a proper 13B single turbo setup.
20b Engine Build and Conversion Pricing from Vendors - RX7Club.com
20B NA update - dyno results (LONG) - RX7Club.com
I had this idea several years ago and after researching it out the it was quickly scrapped. No way will it compare in price, effort, and end result over a proper 13B single turbo setup.
Last edited by TeamRX8; 09-30-2012 at 02:05 AM.
