Pat's Ebay Turbo Compound Boost Build
#621
+1 for slicks...a manual transmission in your situation at the track NEEDS slicks ..if it was an auto youd have alot better of a chance of getting radial to do work.
#623
Two middle tires are tight against the front and rear lips of the trunk opening, there isn't much pressure on the trunk lid itself. Outside tires are mostly snug against inside tires.
Two tow straps.
#1 is hooked to trunk arm, then routed through wheel spoke, then center wheel hole, then center wheel hole then wheel spoke then attached to other trunk lid arm.
#2 is just through spokes of outer tires and then attached to itself and ratcheted tight. This puts their force on the inside wheels.
I did this probably a few dozen times an hour and fifteen minutes each way to autocrosses. Trunk still closes perfectly. Wheels never moved at speed.
Two tow straps.
#1 is hooked to trunk arm, then routed through wheel spoke, then center wheel hole, then center wheel hole then wheel spoke then attached to other trunk lid arm.
#2 is just through spokes of outer tires and then attached to itself and ratcheted tight. This puts their force on the inside wheels.
I did this probably a few dozen times an hour and fifteen minutes each way to autocrosses. Trunk still closes perfectly. Wheels never moved at speed.
#625
Retired Mech Design Engr
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you have theory and you refuse to accept that it may be wrong
I'm looking at my logs and vss is way smoother from shift to shift
I'm looking at yours and there's a dip then a huge spike
to me that indicates massive shock/stress, more so than what my car is doing
Now, yours is way faster/more powerful, so it's not exactly apples vs apples, but I still think dropping/spiking is just as, if not more harmful as loading up into the next gear.
but we shall see which way works I suppose
I'm looking at my logs and vss is way smoother from shift to shift
I'm looking at yours and there's a dip then a huge spike
to me that indicates massive shock/stress, more so than what my car is doing
Now, yours is way faster/more powerful, so it's not exactly apples vs apples, but I still think dropping/spiking is just as, if not more harmful as loading up into the next gear.
but we shall see which way works I suppose
Regarding keeping power, or not keeping power, in ANY case of flat shifting, one is dumping power by the rev limiter. If the engine is holding 5500RPM under no load, then it is making NO appreciable power. Keeping the turbo spooled, and the MAP up allows the power to come back quickly when spark and fuel are turned back on, but they are not making power while the engine is decelerating.
#626
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Here's a vid from friday night from a gentleman with a go-pro who asked to film my car. This was the first pass with this setup, and only 12 PSI boost as my rear wastegate was broke. So this is what my car does on 12 PSI with an EBAY gt28 only.
Hopefully he's there this friday.
Hopefully he's there this friday.
#630
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It's 59 miles away, with Houston traffic on a Friday that's a long drive there, and an expensive tow truck back if I break it. And they are slammed compared to 1/8th mile, you get 3-4 passes there if you are there the entire time, vs 15-20 passes at the 1/8th mile track.
So I go to the 1/8th mile. And not running 1/4 until it's reliable in the 1/8th anyway.
So I go to the 1/8th mile. And not running 1/4 until it's reliable in the 1/8th anyway.
#636
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#639
I stick with Plus because that's enough to get the Miata home from pretty much anywhere I drive it. If it goes further than that, it goes there on the trailer.
--Ian