The Official "RX8 in DSP" Thread - Page 26 - RX8Club.com



RX-8 Racing Want to discuss autocrossing, road-racing and drag racing the RX-8? Bring it here. This is NOT a kills/street racing forum.

Reply
 
 
 
Thread Tools Search this Thread Rate Thread
Old 09-06-2017, 02:07 PM   #626
Registered
 
Join Date: Mar 2015
Location: CT
Posts: 81
Thanks: 0
Thanked 0 Times in 0 Posts
Thank you so much! I'm elated with 2nd. I held the lead today until JV's last run. He really deserved the win! Mike was crazy close behind me too. Awesome rx8 finish, maybe next year we can move up a spot ;p

I'll share videos later. Thanks for the support!
Tamra is offline   Reply With Quote
Old 09-06-2017, 03:28 PM   #627
Koi no Ousama
Thread Starter
iTrader: (25)
 
TeamRX8's Avatar
 
Join Date: Apr 2005
Posts: 19,503
Thanked 99 Times in 87 Posts
Guess I better have my leg shaver ready next year ... :yikes:
TeamRX8 is offline   Reply With Quote
Old 09-06-2017, 09:57 PM   #628
Registered
iTrader: (2)
 
Kennetht638's Avatar
 
Join Date: Jun 2006
Posts: 181
Thanks: 0
Thanked 0 Times in 0 Posts
Great job Tamra and Mike! Very impressive performances from you both. It's awesome to see RX-8s bringing the fight to DSP.
Kennetht638 is offline   Reply With Quote
Old 09-08-2017, 11:37 AM   #629
Registered
 
Join Date: May 2017
Location: Hayward, Ca
Posts: 14
Thanks: 0
Thanked 0 Times in 0 Posts
Anyone have a second hand master cylinder brace they aren't using?
Teetsdownlow is offline   Reply With Quote
Old 09-08-2017, 12:28 PM   #630
Koi no Ousama
Thread Starter
iTrader: (25)
 
TeamRX8's Avatar
 
Join Date: Apr 2005
Posts: 19,503
Thanked 99 Times in 87 Posts
Might be better to look for a Mazdaspeed strut tower brace that comes with an MC support instead?


TeamRX8 is offline   Reply With Quote
Old 09-08-2017, 01:02 PM   #631
RIDE HARD
iTrader: (9)
 
200.mph's Avatar
 
Join Date: Aug 2008
Location: BALLS DEEP
Posts: 4,425
Thanked 127 Times in 113 Posts
9krpm has a ms brace f/s
200.mph is offline   Reply With Quote
Old 09-08-2017, 04:17 PM   #632
Koi no Ousama
Thread Starter
iTrader: (25)
 
TeamRX8's Avatar
 
Join Date: Apr 2005
Posts: 19,503
Thanked 99 Times in 87 Posts
He sold it several months, Motorsports racer price for a new one is about the same price too I think.
TeamRX8 is offline   Reply With Quote
Old 09-09-2017, 07:00 AM   #633
Registered
 
Join Date: May 2017
Location: Hayward, Ca
Posts: 14
Thanks: 0
Thanked 0 Times in 0 Posts
Yeah I didn't see one from 9k. Team that is my 2nd option but not through maz motorsports. I believe my license is expired. I havent been competitive since 2013 so id have to read the contigencies again.I'd rather not pay for a bar that is not needed but beggers can't be choosers. Thanks

Got out of autocross a few years ago, I think I'm going to give regional hpde a shot out here in the bay area.
Teetsdownlow is offline   Reply With Quote
Old 09-09-2017, 08:17 PM   #634
Registered
 
Join Date: Mar 2015
Location: CT
Posts: 81
Thanks: 0
Thanked 0 Times in 0 Posts
Tamra is offline   Reply With Quote
Old 09-09-2017, 10:18 PM   #635
Registered
 
ajrrx8's Avatar
 
Join Date: Sep 2008
Location: Palm Bay, FL
Posts: 20
Thanks: 0
Thanked 0 Times in 0 Posts
WOW, Awesome driving. Congrats.
ajrrx8 is offline   Reply With Quote
Old 09-10-2017, 09:27 AM   #636
Koi no Ousama
Thread Starter
iTrader: (25)
 
TeamRX8's Avatar
 
Join Date: Apr 2005
Posts: 19,503
Thanked 99 Times in 87 Posts
Looked really fast. I might have to hire you to teach me to drive, lol. What does that shock setup cost?
TeamRX8 is offline   Reply With Quote
Old 09-10-2017, 09:35 AM   #637
Registered
 
Join Date: Mar 2015
Location: CT
Posts: 81
Thanks: 0
Thanked 0 Times in 0 Posts
Thanks guys! The car was fun and easy to drive. We have ideas to make her even better for next year, along with continuing to improve the nuts behind the wheel.

The shocks were the biggest part of the budget. Everyone told me, do it right the first time or you will spend more money in the long run.... so I went with Anze Penske 7300s. They completely transformed the car. The package was a little under $4k including springs but using OEM top hats. We now have spherical top hats front and rear (We DIY made the rears). I'm certain Anze could make some as well and I would highly recommend it to avoid the side loading on the shaft. Another option would be to run inverted but that wasn't in our initial budget.
Tamra is offline   Reply With Quote
Old 09-10-2017, 09:49 AM   #638
Koi no Ousama
Thread Starter
iTrader: (25)
 
TeamRX8's Avatar
 
Join Date: Apr 2005
Posts: 19,503
Thanked 99 Times in 87 Posts
I have spherical tops and bottoms both ends. Does it use the RX8 tall steel or MX5 short aluminum rear shock towers? I just swapped out my modified MX5 aluminum rear shock towers back to the RX8 steel ones. With a high rear spring rate I became concerned about flexure. Was planning on a rear strut bar too for the same reason.

A lot of the aftermarket shocks just use the MX5 rear shock length and short MX5 shock tower, so I wasn't sure.
TeamRX8 is offline   Reply With Quote
Old 09-10-2017, 09:56 AM   #639
Registered
 
Join Date: Mar 2015
Location: CT
Posts: 81
Thanks: 0
Thanked 0 Times in 0 Posts
Like I said, Anze did not provide any top hats since originally we planned to use the OEM top hats (but they do offer them/can make them). About a month ago we DIY made our rears into sphericals using OEM RX8 steel ones. The MX5 ones were 2" shorter than the RX8 ones so we would have lost too much compression travel unless we lengthened them, and we also had concerns about losing the extra attachment points.
Tamra is offline   Reply With Quote
Old 09-10-2017, 12:32 PM   #640
Koi no Ousama
Thread Starter
iTrader: (25)
 
TeamRX8's Avatar
 
Join Date: Apr 2005
Posts: 19,503
Thanked 99 Times in 87 Posts
So I never saw anything in Fastrack regarding the addition of a Sohn adapter, but supposedly someone may have submitted it for review?

Edit: I just went ahead and formally submitted it for clarification.


Quote:
Letter ID Number: #22674

Title: Rotary engine reliability allowance clarification request

Class: DSP

Request: The rotary engine is unique in many ways compared to a reciprocating piston engine. One of the unique features is that it requires the intentional addition of oil into the combustion chamber to lubricate the rotor apex seals, which are the equivalent of piston rings. Mazda accomplishes this on the later 13B/Renesis rotary engines by diverting engine oil to a metering pump that distributes the oil through piping lines to oil injectors tapped into the rotor housings which are the equivalent of an engine block and piston bores. For these later Mazda engines the metering pump mounts externally on the side of the rotary engine with 3 or 4 bolts. A rotating shaft is gear-driven off the internal oil pump system to operate the oil metering pump function with the delivery volume being load-based either mechanically on earlier metering pumps to fully computer-controlled on the Rx-8 Renesis engines.

However, despite Mazda choosing to do it this particular way, enthusiasts recognized that engine oil is not intended to be burned in the combustion process and it also becomes contaminated over time between oil changes through the usual combustion engine operating process. Further, the critical reliability function of a rotary engine longetivity is to keep the rotor seals lubricated and operating properly to maintain good engine compression. So in an effort to improve longetivity and reliability a device was developed, commonly referred to as a "Sohn Adapter", with the intention of blocking the engine oil feed supply and instead supply the Mazda oil metering pump with clean "pre-mix" type oil from an external storage tank. Some enthusiasts have chosen to instead add pre-mix oil into their fuel tanks. While the amount of oil will vary based on fuel consumption load, it lacks the fine control of a true load-based system. The fuel system also wasn't designed with this purpose either.

The Sohn adapter device is just a machined plate with a drive-shaft extension through it that mounts between the Mazda oil metering pump and the external side of the engine with longer bolts. The adapter itself requires no modification other than the longer bolts to accomodate it's approx. 1/2" thickness width. It does however require mounting an alternate oil feed storage tank in the engine bay and plumbing a hose from the oil feed tank to the oil inlet nipple on the adapter. plate. The tank, feed hose, adapter plate, and longer bolts are entirely a 100% weight addition. The only modifications are to locate and drill the oil tank mounting bolt holes on the engine bay/chassis structure, typically an allowed procedure for allowed modifications, and replace the original Mazda oil metering pump mounting bolts with longer fasteners. This is a 100% reliability/longetivity improvement modification. It provides no additional performance to the engine other than keeping it operating at the optimal potential performace level. It is manufactured and sold through Rotary Aviation in the weblink below with pictures and operating explanation:

http://www.rotaryaviation.com/store/..._Adapters.html

It seems to me that with the recent Street Prepared category rule changes regarding reliability allowances that this would be considered an allowable modification. The intention of this request is to ask for a confirmation and clarification that this modification for rotary engines qualifies as being allowed per SCCA Solo Rule 15.10.DD (engine/drivetrain reliability modification allowances) coupled with Rule 15.10.A (engine oil system modification allowances) and further supported by Rule 15.10.CC (alternate oil system supply tank modifications).

Thank you for your effort and consideration of this request.


.

Last edited by TeamRX8; 09-10-2017 at 02:14 PM.
TeamRX8 is offline   Reply With Quote
Old 09-10-2017, 09:48 PM   #641
Registered
iTrader: (1)
 
Join Date: Sep 2011
Posts: 54
Thanks: 0
Thanked 0 Times in 0 Posts
Great Drives Tamra! Thank you for setting up the co-drive with Tim, super helpful and easy co-driver to have. It was invaluable to have someone to help benchmark where car is vs. drivers. I spent so much time thinking about the OPR on Wedensday, i think the piece of mind is worth more than the actual effect of shaving between runs.

It's only a matter of time before that Jacket is yours. I'm hoping this offseason is super productive.
mrazny is offline   Reply With Quote
Old 09-13-2017, 12:24 PM   #642
Registered
iTrader: (1)
 
Join Date: Sep 2011
Posts: 54
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by TeamRX8 View Post
Nice numbers, but I wouldn't get caught up in the dyno comparison malarkey. In fact, it wouldn't surprise me if a Dynojet gave lower numbers, having seen it happen before.

Started my header surgery today ....






The 12 degree collector is so long that there won't be but maybe 6"- 9" of additional tube length to add.




.
Were you still looking at quotes for the Header for more runs of it?
mrazny is offline   Reply With Quote
Old 09-13-2017, 02:38 PM   #643
Koi no Ousama
Thread Starter
iTrader: (25)
 
TeamRX8's Avatar
 
Join Date: Apr 2005
Posts: 19,503
Thanked 99 Times in 87 Posts
Not initially. I want to build a prototype first to keep my build going forward for now and come back to that later when I look at having a lightweight copy made.
TeamRX8 is offline   Reply With Quote
Old 09-21-2017, 10:11 AM   #644
Registered
iTrader: (1)
 
Join Date: Sep 2011
Posts: 54
Thanks: 0
Thanked 0 Times in 0 Posts
https://www.scca.com/downloads/38162...-solo/download

New fasttrack is out. Sohn Adapter is clarified to be legal (but under the new reliability language, not the other angles thought about in here). It does specifically address that no re-purposing of exisiting parts (like the washer bottle), but no issue with new reservoir installation.

So the new containers are not a problem, but removing or utilizing the existing washer bottle is right out.

There is a proposal for a language change for the Radiator allowance, removing the word "core", and instead just considering the overall dimensions (though the language about the liquid capacity of the Core would remain).
mrazny is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
{ FS } 05 Sunlight Silver RX8 GT - 57.5k miles - 6 Speed MT - Clean akagc RX-8's For Sale/Wanted 7 08-11-2015 07:07 PM
Rear Stationary Gear Bolts MolsonB Series I Tech Garage 5 08-08-2015 01:24 AM
Crank trigger connector/crank angle sensor location Pelleilee New Member Forum 5 08-02-2015 02:44 PM
New member, RX8 MGB Hybrid :) shambo New Member Forum 9 07-18-2015 02:07 PM
New Member Introduction dmengel New Member Forum 3 07-18-2015 09:35 AM


Tags
18x10, 18x105, 26535, 2953018, 29530r18, caster, clearance, fender, minimum, roll, rx8, rx8club, speedway, stx, swaybar, wheel

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 11:39 PM.


All content Copyright 2017 by Internet Brands, Inc.