Originally Posted by Spookyfish
That car had a 3.6 Torsen, ~235rwhp and about 2200lbs on 225s R888s.
Can we get pictures and full specs of the car? I would really like to see that.
Judging from the video intro, it has a stock front bumper with a bunch of ducts and cooling holes and a simple lip spoiler with splitter. GTC-200 wing, sitting at about 5" pinch weld height on 8" wheels with a stock shaped hard top. Is that how it ran the 8:07?
What was Ton's average speed? That's an important bit of data.
Here's another turbo NA street car on the ring. Almost no aero and no hard top, 8:05 here
I don't understand the time vs distance argument you made. Time is time whether you are going 10mph or 100mph.
Also don't understand the wheelbase argument. You really think that a wheel base must be longer to lower lap times?
It's great for us in the US to see Ton's great lap and learn about the car. One of the things we do here at 949 Racing on a daily basis is assess the value and effectiveness of Miata performance modifications in a racing environment. It's what we do for a living, and all we do. Constant testing on a huge variety of componentry and tuning. Our team alone puts about 200 race
hours a year and another 200 hours of open practice, time attack and testing. We win a lot of races and set lap records at every track we visit. Whatever you are thinking of trying next, we probably already have.
That knowledge base enables us to make some reasonably accurate predictions of mods vs lap times once we have a baseline as we now have with the blue turbo NA and Ton's car. So my rough estimate and prediction is not random number.
Starting with Ton's car:
What do you suppose that's worth? On our highest speed track, that's changes a 235whpMiata with aero from about 1:50 to about 1:43. So ~7s per 2:00 or 28s over 8:00
Add 2"' of wheel width and a Hoosier slick combo that is ~12s faster than an R888 on a 2:00 course. 48s faster over BtG from tire alone.
Delete 100lbs. Typically about 1s on a 2:00 course
Add 300lbs of downforce. About 5s on a 2:00 course, 20s over 8:00
Clearly not every mod is additive. Much like a 4whp intake, 6whp exhaust and 10whp header might be 14whp and not 20whp. So 140s faster is not possible. The reality, I think is far
under 7:00 though and I would stake a large bet on that.
This is not including aero drag reduction, 6 speed over 5 speed, tuned OS Giken diff, optimized weight distribution and polar moment of inertia, etc.
I'm not flatly stating that I or anyone else can absolutely do 6:30. I am pointing to evidence, based on substantial experience, that there are very large gains to be made. Over a minute easy. Ton's car, while well thought out and tuned, is nowhere near
the cutting edge of Miata race development. Ton's car on Buttonwillow 13CW (A standard reference in California) with what looks like maybe 8" wheels on 225 R888's would do about a 1:59. My daily driver with 147whp does 2:02's on street tires. We have cars built and running that will do 1:48 with the right driver and tires.
We get a constant stream of magazines, blogs, TV shows bringing supercars with good drivers to Buttonwillow 13CW. None have ever gone faster than our heavy 230whp time attack car from two years ago.
When it is all said an done, this isn't just smack talk. Excluding the variable of traffic, a lap way below 7:00 is possible, you just don't see it yet.
Maybe I need to be like FM and ask my customers to send me money so I can take the OGK to Nurgburging ring for a sub 7:00 BtG.