Heavy Z Posted June 19, 2002 Share Posted June 19, 2002 You guys have a point about speed being relative - even by the second day with the new diff I feel alot more settled into the car. Maybe some more horses isn't such a bad idea... Grumpy, I know you're the man so let your cam creativity fly and please give me some guidence, this Z has a 327 from a '67 vette, edelbroch heads and intake, 650 double pumper, roller rockers, HD springs & pushrods, and a STOCK CAM. I'm thinking it might have 1.6 rockers because it has no problem in revving between 5000-6000 rpm, but I don't know for sure. It does have the rams horn exhaust manifolds, which I'd like to keep if possible(I'll run a good free-flow system behind them). Any suggestions as to a good cam would be much appreciated. In my L series Z I went hog-wild on the cam, and of course paid a price in streetability. I didn't mind then, but with this engine I'd like an engine that is more versatile, but also cammed to better complement the strengths of the 327 design. Thanks, Heavy Z Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted June 19, 2002 Share Posted June 19, 2002 first those rockers normally are stamped they will be marked 1.6 if they are aftermarket 1.6 ratio rockers if they are not marked at all chances are excellent that they are stock 1.5 ratio arms next whats wrong with the cam you have now? what are you trying to do with the car? whats your hp goals? please give all the info you can so reasonable choices can be made.things like, car weight rear gear ratio etc, this is all the info you gave! now an excellent cam choice can be made but your going to need to live with that choice so if you tell me full race dont expect to take long trips and get great mileage, full race type cams work like crap below 4000rpm, so think about what you really want and try to describe it truthfully and remember a cam thats slightly to mild will work far better than one thats slightly too wild 1971 Datsun 240Z w/327 V8 5 Speed Vehicle Description 1971 Datsun 240Z with: Balanced Chevy 327 with aluminum Elderbrock heads, manifold and heavy duty aluminum water pump. The engine has great quality internal components such as the lifter(rollers), push rods, oil pump. The clutch is a Heavy duty Mc Leod unit. The tranny is a T5 out of a Camaro. 650 Holley double pumper carb with MSD ignition (Box) and 8 mm MSD cables and electric fuel pump. The car has ramshorn iron manifolds because I found the headers anoying but the pipe is 2" with a Magnaflow exaust. I did the convertion per JTR manual. The battery has been relocated to the rear and is a sealed, maintenance free unit. The front brakes have the dual piston calipers and the car has 4 coil over with the shortened housing and the shorter brand new KyB shocks. The shifter is a short trow kind made of billet alluminum, Grant steering wheel and some Autometer gauges. The electric fan is the 2 speds from a Ford tempo. All the bushings were replace by urethane and the rack and pinion is rebuilt. As you can see I was building this car to keep it and to be fast. It is not finish. The car runs and will go anywhere but it needs: -The support for and the Camaro radiator suggested by JTR. Right now it has the 280z radiator and it does the job but I like to play it safe -A nicer paint job -Carpet and re-upholster the seats -R200 Differential. Currently it has the R180. It runs but the engine has far more torque and horses than what the differential can hanndle. Rims are Americar Racing Equipment. The engine has around 4K miles. For more info and pics go to: WWW.Grafted-Rx7.com/datsun.html Quote Link to comment Share on other sites More sharing options...
Heavy Z Posted June 19, 2002 Author Share Posted June 19, 2002 Thanks Grumpyvette. To be more specific, my car weighs roughly 2500 lbs. dry, has a 3.7 R200, and I am interested in a cam that will pull strong to roughly 6000-6500 rpm that doesn't lose all it's low end. I am not into a cam that comes on at 4000, a more useable midrange is preferred. If you can give me a couple of choices - say one of a milder and one of a more aggressive nature with rpm ranges for each, I would really appreciate it. Heavy Z Quote Link to comment Share on other sites More sharing options...
Guest the_dj Posted June 19, 2002 Share Posted June 19, 2002 LOL. That rush certainly does go away too fast, doesn't it. When I first got my V8 Z, I drove it for an evening around town, then pulled it into the garage and said to myself, OMG that car scares the living crap out of me. Took me three full days to decide to pull it out again. Now I want more power. What's with that?? Sam Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted June 19, 2002 Share Posted June 19, 2002 Heavy Z get this http://dab7.cranecams.com/SpecCard/DisplayCatalogCard.asp?PN=113802&B1=Display+Card it should be just about perfect for your needs, you can add 1.6 ratio rockers for a slight mid range boost and this cam should pull much better than stock over the whole rpm range.(btw I called CRANE just to varify my choice and they also agreed!) Quote Link to comment Share on other sites More sharing options...
Kevin Shasteen Posted June 19, 2002 Share Posted June 19, 2002 Originally posted by Heavy Z:.., has a 327 from a '67 vette, edelbroch heads.., Heavy Z Which Edelbroch Heads? Port Cfm? Chamber cc's? Dish or Dome Pistons; what are the cc's of the Dome/Dish of that piston? Kevin, (Yea,Still an Inliner) Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted June 19, 2002 Share Posted June 19, 2002 Hey grumpyvette, I saw you're using the ram's horn manifolds. Somewhere in my stack of mags is a add for a company that makes these in aluminum with a 2 1/2" outlet. If I can find it again, I'll pass it along. They even had polished versions, if memory serves. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted June 19, 2002 Share Posted June 19, 2002 Apologies; wrong forum. Quote Link to comment Share on other sites More sharing options...
Heavy Z Posted June 19, 2002 Author Share Posted June 19, 2002 Thanks Grumpy for the cam info. As for the head specifics, all I can tell you is that it has the Edelbroch performer RPM heads and performer RPM intake manifold. I bought the car with the engine already built, and unfortunately the shop that did the work is no longer in business so it's unknown what the chamber cc's are, and the pistons are supposed to by stock '67 vette 327 pistons. If anyone knows if they are dish or dome pistons, please let me know. Quote Link to comment Share on other sites More sharing options...
Heavy Z Posted June 19, 2002 Author Share Posted June 19, 2002 Well it looks like I've got a winner with that cam, Grumpy! I appreciate the help and the call to Crane to check it out, too. Heavy Z Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted June 19, 2002 Share Posted June 19, 2002 Quantrex I have no IDEA where you thought you saw me working with an engine equiped with rams horn exhaust manifolds but I can assure you your confused as Ive not run rams horn exhausts on any engine in the last few years and not on my personal cars for over 30 years Heavy Z you do realise that a set of good QUALITY headers will boost your power far better than those cast iron exhaust manifolds can don,t you. btw the cam will work either way but QUALITY headers are the better choice! Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted June 22, 2002 Share Posted June 22, 2002 You're right grumpyvette, I meant to type Heavy Z. Not only in the wrong forum, I was talking to the wrong person. Confused? Naw, just plain screwed up. (veg) Quote Link to comment Share on other sites More sharing options...
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