new and improved because your car ACTUALLY runs, so it's a compliment.
he was very entertaining when he wasn't drunk posting |
I've seen his posts. Looks like a fun guy. Does he still have his Miata? Just gave up on it?
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Originally Posted by Corky Bell
(Post 1249671)
A 6278 & a 6758. 45 in 5th is about 2200? And offers 2 psi. The 2860 matches that pretty easy, and the 2560 typically hits 4 at 2000 revs.
A VATN Aerocharger could be adjusted to make 10 psi at 1000, but it was undriveable. Best setting seemed like about 4 to 5 psi at 2k was good, but it was reluctant to make 200 rwhp. Perhaps a 2860 and a VATN.............. I think I'll pass. corky |
Twinscroll worth it?
Is there a Miata transmission solution for 450hp at a reasonable price? Until such time, why would above 350hp matter?
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because then we can say we drive 450hp cars even though they've never been past 250 :giggle:
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Rx7 trans is pretty reasonable. Ratios just aren't good for road racing so it gets no attention here.
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Twinscroll worth it?
How about just build a fast spooling 300rwhp 2560 setup? Compromises.
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Originally Posted by aidandj
(Post 1250113)
Rx7 trans is pretty reasonable. Ratios just aren't good for road racing so it gets no attention here.
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The RX-7 Turbo transmission actually has decent ratios for road racing shifting @7,000 rpm gets you about 4,500 in 3rd (from 2nd) and around 5,000 anything above that except from 1st to 2nd which is low 4,000. Most turbo cars are making almost max boost in those ranges.
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Somewhere in the transmissions options thread the rx7 box is dismissed. Not sure why.
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Well depending on the amount of power you make (well torque), they can have issues with 3rd gear on track (north of ~300-350 ft.lbs.)
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What are you running for a trans?
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I currently have a RX-7 Turbo but most likely will switch is out for a dog-gear of some sort in the very near future as I know the turbo transmission will be on borrowed time pretty much right away!
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Originally Posted by bcrx7
(Post 1250170)
The RX-7 Turbo transmission actually has decent ratios for road racing shifting @7,000 rpm gets you about 4,500 in 3rd (from 2nd) and around 5,000 anything above that except from 1st to 2nd which is low 4,000. Most turbo cars are making almost max boost in those ranges.
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Originally Posted by aidandj
(Post 1250172)
Somewhere in the transmissions options thread the rx7 box is dismissed. Not sure why.
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Gearbox options and experiences
<br />https://www.google.com/url?sa=t&sour...La1wvNJtMSqHZA |
Originally Posted by Leafy
(Post 1250430)
Drop on shifts only really matters for drag racing. The issue when using it for road racing is that you're either too low in a gear or too high in a gear while in a corner.
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Originally Posted by aidandj
(Post 1250471)
Gearbox options and experiences
<br />https://www.google.com/url?sa=t&sour...La1wvNJtMSqHZA |
Originally Posted by bcrx7
(Post 1250472)
Carry enough speed in the corner, then you won't be too low in a gear.
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Originally Posted by aidandj
(Post 1250471)
Gearbox options and experiences
<br />https://www.google.com/url?sa=t&sour...La1wvNJtMSqHZA
Originally Posted by bcrx7
(Post 1250179)
Well depending on the amount of power you make (well torque), they can have issues with 3rd gear on track (north of ~300-350 ft.lbs.)
Originally Posted by Savington
(Post 1250484)
Wildly oversimplified. Carry too much speed and you can't use the low gear, which forces you into the next higher gear. On a box like the Rx7 TII box, that means you're way, way down in the RPM range.
But I do have a question for anybody who has an opinion/experience: Is the RX7 TII transmision stronger than the Miata 6 speed? All other things aside, is it at least a stronger box? It seems that it is from my reading online. |
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