New FP miata
#61
My only point here is that generalizations don't necessarily apply. There are still good EV6 injectors just like there are still good SD IV injectors. Heck, there are some new SD V injectors out (80lb/hr shorties) that are great even though the newest series for port injection is SD VII.
#62
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Will be testing this new wheel and tire package next week. Plan is to test this vs my 15" setup. I have a second diff built with proper gearing for 13's. I plan to run the 15" setup then swap diffs and wheels and run again. I know the 15's will take more abuse, but Im thinking that the lower center of gravity may improve handling and be a little easier on the tires.
#65
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Yes, I will be testing both setups the same day. Hoping to do the test with about 1.5 hours between runs. Planning on 10 lap runs. I have full race length data from last season on the 15's. If the 13's prove faster in the short test then I will use them on my first race weekend. The only way to know if they will last and not fall off is to run them in a national length race, they should be good as there are several guys running 13's on their miatas now.
My 15" setup is Enkei RPF1 and Hoosier 215/580R15 in the 80 compound they are a radial slick. The 13" setup is Jongblode 330's and Hoosier 215/530R15 in the 80 compound, also radial slicks. The 13's are 20.8" diameter while the 15"s are 22.9
The car is 2 7/8" at the front pinch weld on the 13" wheels, it will be essential to keep of course excursions to a minimum.
My 15" setup is Enkei RPF1 and Hoosier 215/580R15 in the 80 compound they are a radial slick. The 13" setup is Jongblode 330's and Hoosier 215/530R15 in the 80 compound, also radial slicks. The 13's are 20.8" diameter while the 15"s are 22.9
The car is 2 7/8" at the front pinch weld on the 13" wheels, it will be essential to keep of course excursions to a minimum.
#66
Nice. After moving to 20" diameter slicks for the XP car, I find it very hard to want to move to a something bigger.
How is the rear pinch seam height? I'm at 3 1/8" all around and am dragging the FM frame rails all over the place. Part of the reason I left them on the car. They make nice skid plates.
How is the rear pinch seam height? I'm at 3 1/8" all around and am dragging the FM frame rails all over the place. Part of the reason I left them on the car. They make nice skid plates.
#68
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Update: Weather and work have been against me, and I only have Tuesday and Wednesday this next week, and the forecast is rain and snow....colorado in the spring time. Its looking like I will get to test the week of the 22nd. Will provide updates as they become available. I do have a few shots of the new engine though.
#73
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Shift point is 7800-8k with an 8400 rev limit just in case.
#74
Interesting you mention polishing your stock rods. In my build thread, I have a pic of the polished stock rods in my previous motor.
I think polishing both the crank and rods makes some power too. I have been thinking of polishing the crank on the next motor, but damn that is a lot of work.
I think polishing both the crank and rods makes some power too. I have been thinking of polishing the crank on the next motor, but damn that is a lot of work.
#75
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Some more ****...pics for those inclined to look. Weather is still beating me up out here, looks like next Tuesday and Wednesday are out too for
testing
Harmonic balencer, crank fire trigger wheel and pickup
7.5# steel flywheel and 5.5" clutch, nice upgrade from my flexplate and 4.5" setup
New stepped header
Nice looking collector
how it looks under the car, need to move the trannsmission tunnel a little bit
new tailpipe, this will dump next to the differential.
testing
Harmonic balencer, crank fire trigger wheel and pickup
7.5# steel flywheel and 5.5" clutch, nice upgrade from my flexplate and 4.5" setup
New stepped header
Nice looking collector
how it looks under the car, need to move the trannsmission tunnel a little bit
new tailpipe, this will dump next to the differential.
Last edited by hingstonwm; 04-20-2013 at 06:57 AM.
#78
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Been a while since I posted, finally have some information on th13-15 comparison The short and sweet answer when going from 15's to 13's is you ruin the handling. Even though the control arms don't change angle, roll center is changed due to the entire suspension being moved closer to the ground. The result is a big push and slower lap times. You can tune around the push some by dialing in a bunch of compression in the front shocks and stiffening the rear bar but it is still noticeable.
I have not given up on the 13's yet and plan on making a spring rate change to see if I can help the car. Have also been prepping for the Runoffs, this will be the last year at Road America, it is the 50th anniversary and there are just short of 700 entries, it should be a great event. Next year the Runoffs are at Laguna and the year after that at Daytona.
I have not given up on the 13's yet and plan on making a spring rate change to see if I can help the car. Have also been prepping for the Runoffs, this will be the last year at Road America, it is the 50th anniversary and there are just short of 700 entries, it should be a great event. Next year the Runoffs are at Laguna and the year after that at Daytona.