Re: Lencos in SS
 

Clutch assisted 4 speed. Video is crap but I was running a slower car with mufflers so all you hear is me...

http://user.streetfire.net/video/Spe...ico_171985.htm

Lenco VS Jerico...

http://user.streetfire.net/video/In-...age_210812.htm

Pair of Jerico's

http://user.streetfire.net/video/Fin...-60_166558.htm

Re: Lencos in SS
 

mike i'm with you those little inchers take longer to wind down than they took to wind up,it's a sweet sound.and as you can hear in dinsdale's video's on a clutchless shift you onlt hear a pitch change versus a clutch shift you can hear the clutch engage and pull the motor down.

Re: Lencos in SS
 

Randy,
A clutch that is properly tuned (with slippage) will not pull the motor down as hard on launch. You can see and hear a car with too much clutch on launch. Big wheelies and slamming down are one clue, a discernible "uugh" at the top of the wheelie is another. Looking at 330' times are more important than 60' times as a heavy flywheel can look awesome on a 60' time (especially little engines) but will not carry that great 0-60' to the 60' to 330'.
The clutch that is tuned properly will separate on the gear changes at a more favorable rate for optimum ET. And the science is not just about adjustments. Weight, levers and materials come into play.
A great launch with a properly dialed in clutch may not wheelie as high, but that same car will carry it a lot further. The most awesome runs I ever had in D/S was a couple of passes which carried the front tires all the way through 3rd gear change and the car floated down very softly about a third of the way through 3rd.
The "locked up and tight" is possible with no wheel spin on launch or gear changes and no broken parts. I've been there. I've also seen tremendous drops in ET by loosening it up.
The formula I stand by as accurate is 1320/MPH = optimum ET. If you can't meat or beat that, there are issues. and it's most likely in the clutch.

Re: Lencos in SS
 

thanks jeff, that is what we are looking for. for example in ss/cs we have ran 142.78 mph and a 9.76 et. in the 1/4. in 1/8 mile we have ran 6.09 114.97. in g/sm trim we have ran 5.86 119.90. have not tried the 1/4 yet. is there more there? we plan on picking the g super motor up 50 hp this winter.

Re: Lencos in SS
 

"Let me restate my question, if a motor pulls good from 8200 to 9900, and you lock it down hard in all 5 gears, and you see it never dropped below 8400, and did not blow the tires off, what benefit is slipping the clutch?"


Check out Brett McFarlands red Camaro, about a third of the way through this video. This is a good, clean run, going 10.08 @ 131.06 w/ a 60' time or .01 or less off the formula. This formula is accurate.
So if you can accept this (try it on the NHRA web site for S/SS and Comp records), I would ask you if it's financially prudent to build another 50 HP or get a better clutch program (worth around .50 ET drop in this case)? PM me and we can discuss this further.
Jeff

http://www.youtube.com/watch?v=mQSo17aXsYg

Re: Lencos in SS
 

Thanx to all that have posted links and info. Jeff describes our experience with light flywheel. How much friction area do you think we should run ?