April 25, 2019, 09:40:18 PM

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Topics - Exidous

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So around spring of '17 I was in bad need of new tires. The Sumitomo HTR Z III were 7 years old and while not totally terrible in the dry at this point they were down right scary in the wet.
I had asked around about what size to get and LOF and Blue t2 were quite helpful in getting the sizes sorted.
The car originally had Falken 615's when I bought it and they had gone hard. It's wasn't terrible as I was in Hawaii at the time so I had a little experience with the 200TW tire.
In the spring of '17 I had decided on a set of Yokohama Advan Neova AD08R (name is far too long). 255/35-18 and 295/30-18. The grip was so good that within a month I had split the stock diff shifting from 1st to 2nd. LOVED the tires.
Fast forward through a year in temp controlled storage while I was stationed in Korea and the tires had turned into rocks. Worse than the 7yr old 300TW Sumitomos. In San Antonio on a 90 day I had actually slid through a red light. Fortunately, it had just changed and no one was moving but me.
Prior to the hardening I loved the tire. Great feel and predictable. The back was a little vague but only because my rim wasn't quite wide enough for the 295 tire so it wandered a bit.
The tires now have 8/32" tread left having started at 10/32". After a bit of back and forth, a lot of reluctance on Yoko's part, dodgy excuses and a very helpful Discount Tire employee I'm able to get a pro-rated store credit for the tires. They are being sent back to Yokohama for analysis and if they find a manufacturing defect(hardening I hope) I'll get a full price refund rather than 75%. 75% because min depth is 2/32". So the advertise 10/32" but you only have 8/32" of usable depth. All manufacturers seem to do this. Makes a refund in my case go from 80% to 75%.... :-/
I was pretty skeptical early on about getting anything back. Trying to swallow a $1400 waste of money with 2k miles and no racing or track time was difficult to say the least. Discount Tire honestly was pretty awesome about it. Yokohama, not so much but they may make thing right still. I won't be holding my breath.
Maybe I just got a bad batch and they are better now but I wouldn't buy them again. The manufacturer just tried too hard to get out of honoring their warranty.

Parts for Sale / Feeler/price gauge 1990's Kinesis K58's/Veilside wing
« on: April 24, 2019, 01:11:17 AM »
These are straight out of the 90's before fast and furious was even a thing.

I'm curious what you folks think they might be worth. They'll be all sealed up and lip polished with new stems before sale. I'm just not certain if it will be worth it for me to replace the hardware. ($160) I cleaned the hardware in a vibratory polisher but they will rust I think. The factory anodizing had held up fantastically and is crazy hard.

17x8.5 +44
17x10 +35
Just checked these. Not 100% but really close.

No center caps :-(

They were a perfect fit on the car(FD stock body).

I also have a legit Veilside wing from the same era.

General Tech / Smaller hood gas spring
« on: April 13, 2019, 02:52:03 PM »
So the hood spring kit was awesome but had a couple interference issues. This would actually cause the hood to bulge above the fenders. The spring was too big in diameter and the cnc bracket would hit one of the bolts.

I found a spring solution. Guden makes the GGN47-040-C. Same 40lb pressure. They are well priced too. That being said, now that they are on, I think 30lb would be better.

You'll also need the ball ends. EF090A-02

The area circled in red needs to be shaved down.

General Tech / Branch and Helmholtz resonators
« on: March 29, 2019, 11:36:26 PM »
I had some pretty bad drone around 2100rpm. I've added two 25" side branch resonator to the dual exhaust. When I first drove the car the first thing that ran through my mind was this has to be Voodoo despite the fact that I understand the physics behind it.

The issue is that it has a pretty narrow bandwidth. See the attached. At 145hz there used to be a big peak, now it's a decent valley. I want to broaden the bandwidth.

Queue the Helmholtz resonator. It's not quite as effective at it's fundamental frequency but it has a lot more bandwidth.

I've found the formulas to calculate it however I cannot find a differentiation between an amplifier and attenuator.

With the side branch, 1/4 wave and 3/4 wave are attenuators and 1/2 and full are amplifiers. Easy math. 145hz at 1/4 comes to about 23.3" tube.

Having typed this I think I just realized the answer.

My fundamental frequency is 145hz or 94.2" wavelength. I just need to tune the Helmholtz for 580hz which has a wavelength of 23.3".

Maybe someone else can use this later on. Back to tinkering. Just have to fit a pair of 3-4" canisters in the back of the car somehow.

Side note, I actually made it adjustable with about 2" of play. I think it's actually a tad long. The tone increases noticeably around 2500rpm now that 2000 was brought down so much. Even the idle was tamed a bit. Maybe I'll shorten it an inch to raise the frequency.

Parts for Sale / Swap modified tri-point swaybar
« on: March 15, 2019, 09:53:47 PM »
The arms are notched to clear the rack boots.

I'll clean it up before shipping. :-)


Shipping and PayPal fees not included.


Parts for Sale / Various Mazda steering wheels
« on: March 15, 2019, 09:47:05 PM »
Nardi Flying M w/airbag $150

Nardi MX-5 $125 no airbag

94 FD w/airbag $100

Shipping and PayPal fees not included. All are obo.

Parts for Sale / Holley FPR/Filter combo & Vette FPR/Filter
« on: March 15, 2019, 09:41:48 PM »
I have one of each.

The Holley has about 20 miles on it. It's the -8an o-ring version. Pressure is 4bar. ~59psi $100

The Vette had about 50 miles on it. Includes AN fittings. 58psi $40

Both are plus shipping and obo.

General Tech / Brake and fuel line brackets FD
« on: March 01, 2019, 06:16:14 PM »
Does anyone know if a cheaper solution than these? $75 for 3

I need the two brake lines since I'm running an S2K ABS that is 4 channel.

Drivetrain / Lean a WOT. Didn't used to be like this
« on: February 18, 2019, 11:47:48 PM »
Before I went to Korea for a year the engine was pulling about 108% on the VE at peak torque. Now it needs over 120%. Not realistic for my motor.

Obviously I'd think the fuel pressure was dropping but it's a solid 58psi the whole time. Injectors are spotless. And I just calibrated the o2's. It has the Bosch 4.9 sensors. LC-2 WB's.

I even checked the valve springs.

The issue is only at WOT. Any other time everything is fine. Any ideas?

The Lounge / Looking for a turbine hvlp paint gun
« on: February 08, 2019, 10:15:25 PM »
Ideally I'd like to rent one. $1500 seems to be where all the decent ones are priced.

Anyone have experience with them? Looking to paint the RX and not have it end up like a B is for build hack job.

Build Threads / Does this count as "other swaps"?
« on: February 06, 2019, 12:03:16 AM »
So I had mentioned in another thread that I had quite a few plans for the house I bought less than a month ago. Closed on 11 Jan.

The house is nothing fancy. 1500sq ft in a nice location and no one behind me. San Antonio has notoriously hard water(10-30gpg). The house has a standard 50gal water heater and no softener(or even a loop for one). I didn't want to eat into my garage space so I took out the year old tank and replaced it with an electric tankless unit and softener. The house is all electric so the heater needed 3, yes 3, 40amp double pole breakers running at 240vac for a total of 27kW.

The garage just wasn't going to cut it, so the RX finally was going to get a decent home. I ground and etched the very poor concrete. Filled in the thin crack that ran across the room, filled in all the small holes and put down a new floor epoxy. I was originally going to use black, white and blue chips but decided to swap out the blue for hunter green. (Brownie points since it's the wife's favorite color)

Now I need your help. I need to pick a wall color. It will be semi or full gloss. The whole house is shades of beige. This must change. RX is black and may go to montego soon.

Pics coming shortly.

The Lounge / Garage floor coating
« on: December 17, 2018, 07:09:17 PM »
Looking for any input on garage floor coatings.

The Rust-Oleum epoxy send to have mixed reviews at best with coverage and color issues.

Also looking at polyurea coatings that have a near infinite pot life and extremely durable but easily double the price. ~$850

I'll be doing it myself. It's about 400sq ft and I'll be grinding it with a rent-o-tool.

Electronics / RX7 moved to another country and now runs like poo MS3
« on: January 21, 2018, 11:28:16 PM »
So last fall I moved from the Netherlands to Korea(the southern type) and the FD went to my brother in Delaware. Before the car was shipped it ran really rather well. The only part not really tuned was cold startup(below freezing) and closed loop. All the AFR's were dialed in rather close both on the road and dyno.

Now the car is in Delaware and it's running super rich. It went from 14.6 to 11.2. The kPa on the baro is only 1-2kPa different and the temp was in the mid 40's. I have not recalibrated the O2's but when I pulled fuel it got better falling pretty much inline with what the O2's are saying.

That being said, can any of you think of anything that would cause this? It took the car about 3 months to be delivered. Warm or cold it acts the same. I have to pull roughly 15-20% in the VE table. I could see an AFR point but 3-4?

https://drive.google.com/open?id=1eatXulej0zbJ9rxKienYVcharLv6eUwL My project backup

https://drive.google.com/open?id=1_OaeXkMjCJdR1gx8O1OYjEbZsR7A_cr2 The tune

The Lounge / Daily suggestions
« on: November 03, 2017, 09:25:26 AM »
So I'm in Korea now until Oct 2018 and am thinking about a quick daily. My wife has her Rubicon, I have the RX but I need something a "little" more civil. I'm trying to avoid new cars.

I'm kind of all over the place at the moment.

2014ish M5
Focus RS
CTS-V sedan LSA version with a stick
I LOVE the looks of the alfa GQ but it's still too new
I love the new ZL1 but it's too raw like the RX and probably not a whole lot faster.

No mercs or audi's. Worked on em both, hell no.

Just looking for ideas. Between 20-50kish 4 doors is a big plus.

Parts for Sale / Earlier Samberg radiator incomplete
« on: September 14, 2017, 07:22:16 AM »
So I have a pretty beat up Samberg radiator. What you see in the pics is what you get.

It does have a couple small leaks that need to be fixed. You can run it but you'll have to check the coolant level every couple weeks.

The fan is included.

$200 obo + shipping

Shipping will be with USPS from zip 09752

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