Koni Yellows in H Stock--anybody doing this? - Mazda3 Forums : The #1 Mazda 3 Forum
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post #1 of 29 (permalink) Old 12-06-2011, 09:35 PM Thread Starter
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Koni Yellows in H Stock--anybody doing this?

I ask because in my SCCA region, I have to deal with the ex-Jack Burns 2007 national championship car (Koni FSD/H & R front sway/Hoosier A6) and another one set up nearly identically except slightly smaller front sway. Both of these guys are really good drivers who can afford the tire bill for much more seat time than I get, so I am looking for some other way to gain an advantage. I will be replacing my original struts/shocks with something before the new season opens next spring, and if the Yellows can give me an edge over FSDs without thoroughly destroying the ride on the street, I might go that way. Driving impressions from anybody who is using Yellows with stock springs will be much apppreciated. Thanks.
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post #2 of 29 (permalink) Old 12-06-2011, 11:04 PM
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Re: Koni Yellows in H Stock--anybody doing this?

Do you have a reason for thinking the Yellows will have an edge over FSDs? I've been an H-Stock prepped car with FSDs and it was phenominal. The extra compliance of the FSD's really gave a ton of extra grip on the patchy sections of the course where a stiffer damper would have clattered over it. After racing my 3 on Tein Basics, I fully appreciate the aptitude of a "softer" damper.


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post #3 of 29 (permalink) Old 12-07-2011, 05:10 PM
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Re: Koni Yellows in H Stock--anybody doing this?

Be aware that the Koni Sport "yellows" are only externally adjustable on the front for the MZ3; they must be removed from the rear to adjust.

So, I too am looking at which shocks to get, and am leaning in the direction of the Konis Yellows........but am really pondering that rear adjustment issue.

Adam..... darn you!

The Bilsteins are even MORE money than either Koni......or do you have a good source? :shock:


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post #4 of 29 (permalink) Old 12-07-2011, 07:07 PM
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Re: Koni Yellows in H Stock--anybody doing this?

[quote author=solomaniac link=topic=201481.msg4157552#msg4157552 date=1323225332]
I ask because in my SCCA region, I have to deal with the ex-Jack Burns 2007 national championship car (Koni FSD/H & R front sway/Hoosier A6) and another one set up nearly identically except slightly smaller front sway. Both of these guys are really good drivers who can afford the tire bill for much more seat time than I get, so I am looking for some other way to gain an advantage.
[/quote]

Okay, a couple of questions to the OP...

1. What are you running for tires, because if you're not on R-comps, it won't matter what shock you put in.

2. How far behind the leaders are you, specifically, how many seconds and how long is the course?

3. How many events per year do you attend? Seat time is king and if you are only attending a few per year, you could have F1 spec shocks and it won't help.




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post #5 of 29 (permalink) Old 12-07-2011, 07:09 PM
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Re: Koni Yellows in H Stock--anybody doing this?

Things are gonna change next year for HS. Whoever is driving Jack Burn's Mazda3 will probably dump the H&R front sway and put a stiffer RSB on it. As far as the shocks for HS, you can't really go wrong with Koni Yellow, FSD, or Bilstein Sport shocks. After doing some research I went with the Bilstein Sport shocks. I didn't like the fact that you can't adjust the rear Koni's on the fly, the adjustment isn't linear, and yellows have shown to be inconsistent from shock to shock. The FSD's aren't bad, but I wanted something that would give the car a firmer/sportier ride all the time. The Bilstein's fit the bill nicely and I have been very happy with them. The ride is noticeably firmer than stock, but coupled with stock springs the ride is not out of line at all for daily driving especially if you enjoy a performance oriented ride. Also the Bilsteins are to put it plainly "overbuilt." Front struts are a load bearing part and Bilstein made them very beefy designed to keep flex at bay. The shaft on these things is over double the diameter of the stock struts and about double that of the Koni as well.

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post #6 of 29 (permalink) Old 12-07-2011, 07:13 PM
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Re: Koni Yellows in H Stock--anybody doing this?

[quote author=mazda3az link=topic=201481.msg4157954#msg4157954 date=1323295846]

Related question; I have a 40,000 mile '08 Hatchback S (2.3) with original shocks. In first gear I have obnoxious wheel hop ...SLAP/SLAP/SLAP!.

It's only first gear, turning, with heavy throttle.

I'm hoping the new shocks will cure this.
[/quote]

Shocks might help this, but it is a FWD car, you can't do a lot of turning in first gear with a heavy throttle. Better off short shifting.

2008 New England Region SCCA HS Class Champion
2008 New England Region Stirling Moss Championship co-winner.
92HS - 2007 Mazda 3s Sport Sedan -2006 Miata Wheel, 16x6.5, 15lb w/ Hoosier A6 245/45R16 (f) and 225/50R16 (r) MS Accessory Sport Shocks
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post #7 of 29 (permalink) Old 12-07-2011, 07:16 PM
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Re: Koni Yellows in H Stock--anybody doing this?

Yep, I did a search, check with Adam, and found that this was a common issue.

Memories fade with time, but don't seem to recall this much hop with my Neon ACR's........... :shock:

Will better shocks at least help?

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post #8 of 29 (permalink) Old 12-07-2011, 07:23 PM
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Re: Koni Yellows in H Stock--anybody doing this?

[quote author=mazda3az link=topic=201481.msg4158026#msg4158026 date=1323303362]
Yep, I did a search, check with Adam, and found that this was a common issue.

Memories fade with time, but don't seem to recall this much hop with my Neon ACR's........... :shock:

Will better shocks at least help?
[/quote]

Yeah, well, I remember ACR's being sprung a bit stiffer than our cars, not to mention having a lot less wheel and tire weight. Then again, at 40,000 you don't have to worry about puking a head gasket on our cars.

Shocks would help a little.

2008 New England Region SCCA HS Class Champion
2008 New England Region Stirling Moss Championship co-winner.
92HS - 2007 Mazda 3s Sport Sedan -2006 Miata Wheel, 16x6.5, 15lb w/ Hoosier A6 245/45R16 (f) and 225/50R16 (r) MS Accessory Sport Shocks
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post #9 of 29 (permalink) Old 12-07-2011, 07:32 PM
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Re: Koni Yellows in H Stock--anybody doing this?

Scott, Paul is right. Putting performance shocks on certainly isn't going to hurt in the wheel hop dept. I'd go ahead and do the shocks if you were planning to upgrade anyway. Neither is replacing your passenger side engine mount if it is shot. My engine mount failed while autocrossing on street tires so just because you are not on r-comps doesn't mean it hasn't failed. Check it! That said, if you turn the wheel and mash the gas in 1st gear, you'll still probably get some hop, just not as much.

This engine mount looked perfectly fine from the topside.

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post #10 of 29 (permalink) Old 12-07-2011, 07:48 PM Thread Starter
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Re: Koni Yellows in H Stock--anybody doing this?

[quote author=PZ link=topic=201481.ms4158021#msg4158021 date=1323302878]
[quote author=solomaniac link=topic=201481.msg4157552#msg4157552 date=1323225332]
I ask because in my SCCA region, I have to deal with the ex-Jack Burns 2007 national championship car (Koni FSD/H & R front sway/Hoosier A6) and another one set up nearly identically except slightly smaller front sway. Both of these guys are really good drivers who can afford the tire bill for much more seat time than I get, so I am looking for some other way to gain an advantage.
[/quote]

Okay, a couple of questions to the OP...

1. What are you running for tires, because if you're not on R-comps, it won't matter what shock you put in.

2. How far behind the leaders are you, specifically, how many seconds and how long is the course?

3. How many events per year do you attend? Seat time is king and if you are only attending a few per year, you could have F1 spec shocks and it won't help.
[/quote]

Tires: Hoosier A6, same as the other guys. Mine are nearly used up and will get replaced sometime in the coming season.

Time: At the last event of the season, I was just over 2 sec. behind the leaders, on a 47.3 sec (for me) course. This is a locale where we run the same course every time, so year-over-year course records are kept. A couple of years ago, Jack Burns set the H/S course record in a Mini at 44.5.

Events: I try to run every local event that I can. This usually totals 7-9 events/year. My competitors usually run at least that many more, out-of-region. A couple of years ago, they both went to the nationals and finished just out of the trophies.

I, too, prefer a more compliant set-up, but I am thinking of a bit of wisdom that I heard some time back from, of all people, Darrell Waltrip: "If you aren't the fastest guy out there and you follow the leader, you will follow the leader." My inclination is toward FSDs, but if someone has experience that indicates an advantage from Yellows, I might go that way.
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