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Afraid I am about to get roasted, this site is brutal but I love it!
Here is where my miata is at today, it's been a long journey over the last 16 months and I wish I would have done a build thread to chronicle it all, just for my own reference as much as anything else. I bought the car nearly stock in February of 2023, it only had ultra cheap coilovers and the rollbar. I ruined the original motor due to oil starvation. (Lost almost 2 quarts in about 250 miles somehow, I didn't check the oil often enough I guess). Swapped in a motor from ebay and have put about 3k miles on the setup since and it feels great. I check the oil weekly now! I've done all the work on the car, to include the tune.
No reason to roast you on that thing. It looks really sharp and has some solid performance. You have a good bit left on the table too, 115mph trap in 1/4 would likely be very low 12,s with a set of drag radials. I see you had a dragy flashing too! Those gadgets are really cool, I use mine a lot for testing.
Damn that's a solid ET and trap speed! And sick car! I'm a sucker for purple haha.
Do you have the thing dyno'd? 16psi on e85 is probably quite a bit of power for that stock bottom end.
Car has not been on a dyno. I run 13psi at 4k ramping up to 16psi at 6k, I run a fair bit of timing, around 23* at 7k. Injectors hit 100% duty cycle around 6800 rpm, I need to go larger soon. According to FIC's injector horsepower calculator, 100% duty with e85 on 640's is about 265whp.
That's a lot of power, but hey if the car stays together and doesn't blow up, it stays together and doesn't blow up lol. You should do a virtual dyno pull to see an estimate of what the hp/tq curves look like. Just remember the more accurate the data you put in is (including the slope of the road), the more accurate virtual dyno will be.
On another note, I'm jealous. I'm at 26psi but without ethanol (96 octane last time I raced, but 100 octane now) and you're trapping similar times and speed as I am. I'm going to pull the excuse that Bristol Motor Speedway is slightly uphill, while the track you're at looks to be slightly downhill. Simultaneously, you're almost definitely shifting faster than I was and your 60' time is slightly better on average. Very cool stuff
That's a lot of power, but hey if the car stays together and doesn't blow up, it stays together and doesn't blow up lol. You should do a virtual dyno pull to see an estimate of what the hp/tq curves look like. Just remember the more accurate the data you put in is (including the slope of the road), the more accurate virtual dyno will be.
On another note, I'm jealous. I'm at 26psi but without ethanol (96 octane last time I raced, but 100 octane now) and you're trapping similar times and speed as I am. I'm going to pull the excuse that Bristol Motor Speedway is slightly uphill, while the track you're at looks to be slightly downhill. Simultaneously, you're almost definitely shifting faster than I was and your 60' time is slightly better on average. Very cool stuff
Appreciate the kind words. I'm very happy with how the car is running right now and don't plan on too many power mods for a while now.
As to my racetrack, it's las vegas motor speedway, so it's hot... real hot, and very uphill. I attached a dragy result to show the slope and 5500ft da.
less than 1% grade is not bad and likely didnt cost you much in the way of time. Now that d/a is another story, I'm sure that cost you a bit. However that 60' time is the low hanging fruit you want to work on. That is where you can get some gains for sure.
Appreciate the kind words. I'm very happy with how the car is running right now and don't plan on too many power mods for a while now.
As to my racetrack, it's las vegas motor speedway, so it's hot... real hot, and very uphill. I attached a dragy result to show the slope and 5500ft da.
I stand corrected, very impressive. I wish I could find that kind of data for Bristol. I could find density altitude though, its showing a forecast of up to 4600ft today, which is a lot higher than I expected.
06-28-2024, 11:00 AM
12.7 @ 115.6mph - Stock VVT Motor / 2560r
4
