Thoughts on new Solo 2 Street Prepared and Prepared rules affecting RX-7s
10-29-05, 11:31 AM
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Thoughts on new Solo 2 Street Prepared and Prepared rules affecting RX-7s
I have been milling over the rules in last Fastrack for next year. The 2 that affect the RX-7s most are:
Street Prepared
"f) Boost regulation systems, either electronic or mechanical, and electronic fuel cuts refrencing boost pressure may be altered or modified except as prohibited herein. Boost pressure changes resulting from authorized changes are permitted"
Great except for
"b) No changes are allowed to wastegate(s) size, number, or location. No changes are allowed to variable-geometry-turbine (VGT) hardware."
F Prepared
RX-7 (79-85)
RX-7 (86-91)
Alternate engine: Renesis
These new rules affect me because I have an FD that I have been running in SM2 simply because I have a PFS Purple EMS. I will be going back to ASP for next year for sure (especially after finishing 26th out of 27 at Nationals). How much boost can we safely extract out of the 13bt and 13brew under this new ruleset?
Also, I have an FC I have been slowly prepping for FP someday. By the time I finish that the Renesis' will be cheap enough to buy one. Will they ever be as versatile as the 13b in AX performance? I know porting is still a little sketchy as seen on RX-8 forum.
Just wanted to get everyone's thoughts on the new rules. We have all winter to get ready for next season. Let's brainstorm to improve the breed.
Jeff
Street Prepared
"f) Boost regulation systems, either electronic or mechanical, and electronic fuel cuts refrencing boost pressure may be altered or modified except as prohibited herein. Boost pressure changes resulting from authorized changes are permitted"
Great except for
"b) No changes are allowed to wastegate(s) size, number, or location. No changes are allowed to variable-geometry-turbine (VGT) hardware."
F Prepared
RX-7 (79-85)
RX-7 (86-91)
Alternate engine: Renesis
These new rules affect me because I have an FD that I have been running in SM2 simply because I have a PFS Purple EMS. I will be going back to ASP for next year for sure (especially after finishing 26th out of 27 at Nationals). How much boost can we safely extract out of the 13bt and 13brew under this new ruleset?
Also, I have an FC I have been slowly prepping for FP someday. By the time I finish that the Renesis' will be cheap enough to buy one. Will they ever be as versatile as the 13b in AX performance? I know porting is still a little sketchy as seen on RX-8 forum.
Just wanted to get everyone's thoughts on the new rules. We have all winter to get ready for next season. Let's brainstorm to improve the breed.
Jeff
Last edited by finky; 10-29-05 at 11:42 AM.
10-30-05, 01:01 AM
#2
Lives on the Forum
Do you mean to say that the FC will be in FSP now, instead of being in CSP? Cool. I get killed in CSP by race prepped Miatas. Maybe I can win now! Muahahahaha! Although the competition will be scarse, not the most fun way to win, but hell, I'll take it!
10-30-05, 10:33 PM
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For the FD ASP is the place to be. Boost is unlimited, you can run an alternate computer like a PFC, Wolf, PF, Etc. The turbo must be stock.
Why do you care if we cannot change or modifiy the wastegate? I still run the stock wastegate at big boost.
I will be running in ASP next year after making some changes to my car over the winter. I ran stock sequential for 3 years with peak boost over 20 lbs. Finally puked the turbos and the exhaust wheel shot out my exhaust pipe in Vegas.
Why do you care if we cannot change or modifiy the wastegate? I still run the stock wastegate at big boost.
I will be running in ASP next year after making some changes to my car over the winter. I ran stock sequential for 3 years with peak boost over 20 lbs. Finally puked the turbos and the exhaust wheel shot out my exhaust pipe in Vegas.
10-31-05, 09:46 AM
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I would like to port the wastegate purely for safety more than performance. 20 lbs hmmm. how were your transitions at that amount. My spikes to 17 are not smooth at all.
10-31-05, 09:48 PM
#6
Originally Posted by Spank
For the FD ASP is the place to be. Boost is unlimited, you can run an alternate computer like a PFC, Wolf, PF, Etc. The turbo must be stock.
Why do you care if we cannot change or modifiy the wastegate? I still run the stock wastegate at big boost.
I will be running in ASP next year after making some changes to my car over the winter. I ran stock sequential for 3 years with peak boost over 20 lbs. Finally puked the turbos and the exhaust wheel shot out my exhaust pipe in Vegas.
Why do you care if we cannot change or modifiy the wastegate? I still run the stock wastegate at big boost.
I will be running in ASP next year after making some changes to my car over the winter. I ran stock sequential for 3 years with peak boost over 20 lbs. Finally puked the turbos and the exhaust wheel shot out my exhaust pipe in Vegas.
I'm currently running generally 2 seconds behind the leader of ASP in my region and that's with 8psi of boost (a boost problem I will fix this winter).
10-31-05, 09:50 PM
#7
Originally Posted by finky
I have been milling over the rules in last Fastrack for next year. The 2 that affect the RX-7s most are:
Street Prepared
"f) Boost regulation systems, either electronic or mechanical, and electronic fuel cuts refrencing boost pressure may be altered or modified except as prohibited herein. Boost pressure changes resulting from authorized changes are permitted"
Great except for
"b) No changes are allowed to wastegate(s) size, number, or location. No changes are allowed to variable-geometry-turbine (VGT) hardware."
F Prepared
RX-7 (79-85)
RX-7 (86-91)
Alternate engine: Renesis
These new rules affect me because I have an FD that I have been running in SM2 simply because I have a PFS Purple EMS. I will be going back to ASP for next year for sure (especially after finishing 26th out of 27 at Nationals). How much boost can we safely extract out of the 13bt and 13brew under this new ruleset?
Also, I have an FC I have been slowly prepping for FP someday. By the time I finish that the Renesis' will be cheap enough to buy one. Will they ever be as versatile as the 13b in AX performance? I know porting is still a little sketchy as seen on RX-8 forum.
Just wanted to get everyone's thoughts on the new rules. We have all winter to get ready for next season. Let's brainstorm to improve the breed.
Jeff
Street Prepared
"f) Boost regulation systems, either electronic or mechanical, and electronic fuel cuts refrencing boost pressure may be altered or modified except as prohibited herein. Boost pressure changes resulting from authorized changes are permitted"
Great except for
"b) No changes are allowed to wastegate(s) size, number, or location. No changes are allowed to variable-geometry-turbine (VGT) hardware."
F Prepared
RX-7 (79-85)
RX-7 (86-91)
Alternate engine: Renesis
These new rules affect me because I have an FD that I have been running in SM2 simply because I have a PFS Purple EMS. I will be going back to ASP for next year for sure (especially after finishing 26th out of 27 at Nationals). How much boost can we safely extract out of the 13bt and 13brew under this new ruleset?
Also, I have an FC I have been slowly prepping for FP someday. By the time I finish that the Renesis' will be cheap enough to buy one. Will they ever be as versatile as the 13b in AX performance? I know porting is still a little sketchy as seen on RX-8 forum.
Just wanted to get everyone's thoughts on the new rules. We have all winter to get ready for next season. Let's brainstorm to improve the breed.
Jeff
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11-01-05, 07:50 AM
#8
trying to build a racecar
The other thing that is allowed in FP is running renesis rotors in a different 13B (4 port, 6 port, etc.).
You can thank (or lambast) me for that one. I wrote a letter asking for clarification on changing compression ratio and that was the result.
You can thank (or lambast) me for that one. I wrote a letter asking for clarification on changing compression ratio and that was the result.
11-01-05, 02:47 PM
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Originally Posted by NeoTuri
I often read that 15-16psi is the max efficiency of the stock turbos.
Oh yeah, thanks Travis.
11-01-05, 06:54 PM
#14
Originally Posted by DELTA_Rotary
What about using update/backdate rules for the 99spec turbos in ASP now?
Originally Posted by Solo II 2005 Rulebook
15.1.C
Equipment and/or specifications 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, modified, machined or otherwise
changed to facilitate the updating/backdating allowance. Standard
factory installation methods, locations, and configurations are
alllowed. The updating and/or backdating of engines, transmissions
or transaxles 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 SportsCar magazine
or SCCA website.
Equipment and/or specifications 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, modified, machined or otherwise
changed to facilitate the updating/backdating allowance. Standard
factory installation methods, locations, and configurations are
alllowed. The updating and/or backdating of engines, transmissions
or transaxles 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 SportsCar magazine
or SCCA website.
11-01-05, 07:00 PM
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99specs were nevere available in the US, so can't be used. I think the new rules will allow an FD to be legally competitive in ASP, though it will very very hard to beat a top level driver in a Z06. If you could change the rear end to something shorter than the 4.1, that would help alot. Unfortunately, that's only possible in SM2.
I agree with Finky on the boost levels. Even when I ran 15psi on stock turbos, I would see a ~80ft-lb jump when transitioning. I would expect to only be worse with higher boost levels, unless you are doing something else that may not be legal.;-)
-Andy
I agree with Finky on the boost levels. Even when I ran 15psi on stock turbos, I would see a ~80ft-lb jump when transitioning. I would expect to only be worse with higher boost levels, unless you are doing something else that may not be legal.;-)
-Andy