Guest JAMIE T Posted June 5, 2003 Share Posted June 5, 2003 I did a search but didn't come up with much. What cams are you guys running? Any dyno, or track ET comparisons? I bought a set of performance valve springs off ebay. They are Schneider supposedly bought new from MSA. I found the thread about an Isky cam, but it ran off topic and the bottom line info was never revealed. So, list your cam and part number if you know it, so I can shop around. Quote Link to comment Share on other sites More sharing options...
240Z Turbo Posted June 5, 2003 Share Posted June 5, 2003 I run a web cam grind 155. I had them push the lobe centers to 110.5deg. I will probably upgrade to grind 87 in the next 6 months. http://www.webcamshafts.com/datsun-auto.html#1 Quote Link to comment Share on other sites More sharing options...
Lockjaw Posted June 5, 2003 Share Posted June 5, 2003 I got a little crower I got off their garage sale deal for 60 bucks. It is .428 lift and .218 duration at 050 with a 110 degree lobe centerline. Advertised duration is 288 degree's. It pulls to 7k ( me rev limiter stops the fun), and idles fairly smooth, there is just enough there to let someone who knows whats up there is an non stock cam there, but most others won't notice. I got a friend who hasn't noticed yet. I would have to hunt for the part number, but it feels good. I just run it with stock springs, and am pretty sure it would work without having to get different lash pads. I used 150's but I put resurfaced delta cams rockers in there, and they are thinner then stock one's. i could have used my stock lash pads. I think they would get 180 to do you a billet copy, and this is really the same cam comp cams said they would grind me, although they were going to open up the lobe centers to 112 degree's. The stock cam is cut on 109 degree centers, so I don't know if that makes much difference until you get a lot of duration. The idea is not to have over lap. Quote Link to comment Share on other sites More sharing options...
jgkurz Posted June 6, 2003 Share Posted June 6, 2003 Here's a post of mine after I installed my ISKY cam...... This email is a little premature as I've not been on the dyno yet, but I wanted to pass on my initial impressions. I went from a stock 82 turbo cam to an Isky L490/L480. First thing I noticed was the idle was a little rougher. This was expected. I actually like the sound of a cam with lope as long as the idle is stable. I set my idle to 750 rpm without much problem. A/F at idle is 14.7, but I had to retard my initial timing from the stock 20 degrees btdc to 10 before I could get it that lean. The timing change was not due to the cam change, but only to prove that the idle could be set to stoich with the new cam. My idle vacuum went from 19.5 "hg to 14.5 "hg. The car is easy to drive in normal stop and go city traffic. There is no noticable difference between the old cam and the new cam in this area. When I mildly accelerate it feels like a bit of low to midrange power is down. When put the hammer down it pulls smoothly and flat to 7000 RPMs. The power is definately improved above 4000 rpms. I'm sure it would go higher than 7K, but I'll wait for the dyno to tell me where my peak power is before I rev any higher. The old cam pulled to 5000-5500 then fell off a cliff. The new cam seems to have a very flat torque curve. Peak power well above the old cam. Quote Link to comment Share on other sites More sharing options...
Lockjaw Posted June 6, 2003 Share Posted June 6, 2003 You dyno that pig yet? Quote Link to comment Share on other sites More sharing options...
jgkurz Posted June 6, 2003 Share Posted June 6, 2003 Not yet....the pig is still a pig. I recently got a promotion at work and decided to do some major upgrades. The car is on jackstands now, but should be complete in late July. Darn 12 hour work days!!! Here's a list of major mods I will have completed before hitting the dyno this summer. I also have a new fuel rail in the works, but until this is done I will only be running 36psi fuel pressure. Hopefully it will be complete this fall some time. Until then I'll probably only put down around 300 RWHP New Isky cam Large NPR IC with 2.5 inlet pipes and 3" outlet Dual electric fans Susp Techniques Sway bars Tokico Illuminas Tension rod kit Bump steer spacers Quick ratio steering arms 3.7 LSD T-5 Trans with B&M shifter Spec 6-puck sprung clutch Aluminum flywheel Dual port wastegate actuator 450cc injectors Walbro 255lph pump Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted June 6, 2003 Share Posted June 6, 2003 I have a Schneider 280-70F - it came from MSA. The lobe separation is 114, the duration is 280 intake, 270 exhaust (240/230 at 0.050" lift at the cam). It has a steep ramp on opening, so there is virtually no overlap (7* at 0.50" camlift). I had it installed 2 years ago, with stiffer valvesprings and new rockers, cost a pile of $$. At that time I was not running an intercooler, and wasn't boosted very high. It idled somewhat rough, but ran really nice up top - I kept hitting the fuel cut on the Z31 ECU at 6400 rpm. I still have the head, and I will probably re-install it later this summer after I get a baseline dyno'd with a stock head and the intercooler -- 15 psi boost. Be a good time to install ARP head studs and a Nissan gasket too.. Quote Link to comment Share on other sites More sharing options...
Lockjaw Posted June 6, 2003 Share Posted June 6, 2003 Mine has negative overlap. Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted June 6, 2003 Share Posted June 6, 2003 Mine has negative overlap. Yes, I think mine is probably over the top. This bad boy has 0.460 lift at the valves, and my exhaust valves were unshrouded a bit. Otherwise my ports are untouched. I'm anxious to re-dyno with the cam change ( and nothing else, except dialing in the same boost pressure) and see what it looks like. Quote Link to comment Share on other sites More sharing options...
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