Subject	In the valvetrain I would say that is due to the JWT springs
Posted by	Ash's Z on December 22, 2011 at 12:13 PM
	This message has been viewed 328 times.
In Reply To	What would you list as the key enabling changes posted by Jim (Selin Design) on December 21, 2011 at 12:46 PM
Message	at 160# vs. 120# for stock. I'm also using stock valves which are a little lighter than oversized valves. In the bottom end I would say the Pauter rods are doing a great job and the crankshaft lightening may or may not have anything to do with it. The counterweight is the most prone part of the crank I would suspect to come apart at higher revs and I did take material off of that part of the crank so I'm sure it helped but not certain if it is required. I haven't taken weight measurements or run any calculations on the valvetrain inertia across the RPM band to justify my suspicion that the JWT HD valvesprings are overkill, but just on the sole fact I was able to rev her that high without putting valves into the pistons is an emipirical test that I would say validates my suspicion. So I would say the key change is in the valvesprings. Enthusiasts soon understand each other. --W. Irving. Are you an enthusiast? If you are out to describe the truth, leave elegance to the tailor. Albert Einstein
Follow Ups	When does it become neccesary to run solid lifters? - Red Hawk (CO) 01:02:02 12/21/11 Re: When does it become neccesary to run solid lifters? - BLACK Z 01:55:20 12/21/11 Another reason is to limit oil consumption in the heads. - Jayru 08:31:11 12/21/11 *hydraulic (n/m) - Jayru 08:35:00 12/21/11 Ok thanks guys, so powerband and oil starvation, but - Red Hawk (CO) 08:58:55 12/21/11 Many factory cars have solid lifters in them. - MixManMash 10:51:49 12/21/11 Sorry I miss-worded that, I meant drivabililty with a cam - Red Hawk (CO) 11:59:58 12/21/11 r5 was designed for solid lifters? - aliaZ 17:35:52 12/21/11 the R5 is the JWT solid cam is it not? (n/m) - Red Hawk (CO) 21:38:03 12/21/11 nope. R5 is hydraulic - aliaZ 00:03:11 12/22/11 the R5 is the JWT solid cam is it not? (n/m) - Red Hawk (CO) 22:56:01 12/21/11 Your lifter wont effect the the low rpm power or torque - twin3037 11:20:54 12/21/11 Agreed on the lash adjustment. - MixManMash 12:24:01 12/21/11 I'm running the 500 series camshafts with hydraulic lifters - Ash's Z 12:27:10 12/21/11 What would you list as the key enabling changes - Jim (Selin Design) 12:46:00 12/21/11 Prob just the cams/headwork and the fact that - The Hawk 19:25:11 12/21/11 In the valvetrain I would say that is due to the JWT springs - Ash's Z 12:13:59 12/22/11 Thanks for the thought out reply... - Jim (Selin Design) 13:06:37 12/22/11 Probably so - I'm not sure how much the counterweights - Ash's Z 22:14:43 12/22/11 500's are designed for solid lifters, but - youngbloodz 14:56:57 12/21/11 Next time you see a 350z, see if you notice any difference.. - Zinn2win 16:11:13 12/21/11 500s are not designed for solid lifters. (n/m) - MixManMash 15:49:20 12/21/11 2nd (n/m) - aliaZ 17:38:11 12/21/11 3rd. Only the JWT solid cams need solid lifters. (n/m) - The Hawk 19:23:48 12/21/11 Here's a question. Do the JWT solid cams still support VTC? (n/m) - MixManMash 06:24:05 12/22/11 yes (n/m) - aliaZ 07:50:49 12/22/11
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