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Messages - tall69

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16
Non-FE Discussion Forum / Re: Drag Racing Clutch and Trans setups on the street
« on: October 23, 2016, 09:18:51 AM »
Thanks Joel.  I hadn't read it explained that clearly.  As I'm not wanting to be messing with it all the time, I'm thinking these are not good choices for me.  Not to mention the significant cost of switching to this setup.

Thinking about a couple other options.  Do you have any experience with mechanical dampeners that slow the release of a traditional clutch to introduce some slippage?  There's a member on the UMTR forum that sells, what basically amounts to a screen door pneumatic dampener.  I would think it would create a bunch of heat and prolonged use would damage the flywheel or pressure plate.  Maybe with more experience I could manually slip the clutch on launch, but I doubt that it would result in consistent 60 foots.

The other option is to introduce more controlled tire spin.  I had attempted to do that by increasing my tire pressure to 21-22 psi.  I run 27x10.5 hoosier QTPs.  It would still dead hook, although I didn't attempt to launch it at 5k+ RPM.  On my fastest run, I launched at 4700, which seemed to create some tire scrub.  Maybe I need a narrower tire with less contact patch or just hit it at 5500 RPM.  That sounds like a recipe for broken parts.

17
Non-FE Discussion Forum / Re: Drag Racing Clutch and Trans setups on the street
« on: October 21, 2016, 01:39:39 PM »
I should have separated the two topics, as I think running a slipper clutch and pro shifted transmission on the street pose significantly different challenges.  I'd see the slipper clutch as potentially more difficult on the street, but more effective on the strip when you compare the two.  True?

I haven't read were others have dealt with that sort of noise and grinding running a soft loc on the street.  Are there different friction materials used that would make that more pronounced?  Such as sintered iron vs kevlar?  You say 1100 pounds, what's a typical street clutch setup?  2200-2500?  Maybe more?

When I rebuilt my toploader last year, I had Tim Hyatt rework my Mcleod pressure plate and flywheel.  I had warped the pressure plate and broken some disc springs.  He recommended I move away from a dual friction setup and provided an organic disc that he thought would be less prone to slippage when hot.  It definitely seems more grippy than my old setup.  It has worked well on the street, maybe too well on the strip.  He steered me away from a centrifugal setup at the time due to my heavy amount of street use.

18
Non-FE Discussion Forum / Drag Racing Clutch and Trans setups on the street
« on: October 21, 2016, 10:36:31 AM »
For you guys who run slipper clutches (e.g. soft-lok) and face plated\pro shifted transmissions, how usable are they on the street?  My Torino is 90% street, but I like to hit the track on occasion.  As setup now, my Mcleod street\strip clutch creates a dead hook situation and will slip badly on occasion.  My car has turned a best time of 11.905@116MPH with a 1.71 60'.  My car is not consistent, and my 60' is primarily the reason.  Most of my time slips have 1.90 and 2.0 60's and ETs in the 12s.  In addition, with 550lb-ft of torque and 2-tons of vehicle, I'm at the edge of what my clutch and driveline can tolerate without failing.

I'm just thinking out loud what the pros and cons would be of having a slipper clutch and\or a pro shifted toploader.  I've read a fair bit about it, and most people do okay on the street, but you have to not be an idiot (with the clutch).

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