Diseazd

Don't run it another second......pull the front cover and reinstall the tensioner plunger. You should be able to retreive the plunger with a magnet extender.

Thanks for the pics......didn't even know they existed.

Just curious.....would you post a picture of your"clean" exhaust manifold.

:laugh::laugh::laugh::laugh::laugh::laugh::laugh::laugh::laugh: Welcome foreign members......glad you love the Z!

I'm with Mark and Leon........go with option 1.

A is 4 cylinder, B is 6 cylinder......they grind solid and hollow cams the same. I've never seen an N47 cam on a spray bar head. Does it have holes drilled in the lobes for internal oiling? It strange to me that they would have a spray bar and internally oiled cam, but have never worked on the early N47 head. Not sure who to recommend, but if you've never done one before, it might pay to ship it off. Z Doctor builds all of my heads, but he has slowed his ops to a minimum. I'm sure Dave Rebello will build you a nice head. My guess with cam, springs valves etc., you're looking at $2,000.00, but only a guess.

Ditto that......

Yes they do have a spray bar.......In fact, you can send the cam from the E31 to be ground if you've got it. Just remember, it must be used with a spray bar.

Cliff.....Just a clarification. You didn't mean you were going to install the cam towers from the N47 onto the E31 did you? It sounded like that what you said in the first post. You definitely would want to use the cam towers from the E31 on the E31, not from the N47. Just checking. Guy

Interesting.....Is the 1 the front and the 2 the rear?

Send your rockers to Delta Cams to be reconditioned like new......$4.00 each. Not sure where to buy lash pads, but you'll need to geometry the cam (center the wipe patterns). Isky sells .175 lash pads which should get you centered, but I find they can vary between .160 and .180's depending on the the head shop getting valve stem height even. Remember.....if you're using the E31 head with the Stage III Isky cam, you'll need the short valve seals mentioned earlier. Isky will take about 2 weeks to get the cam back to you. Finally, you will need to get a set of Isky valve springs to handle the .490 lift cam.

I sense a new fire.............careful Steve... h.p. is more addictive than ohms and volts.

.......and while you're at it, how about an E31 or early E88. Use your existing head for a boat anchor in Lake Lanier! LOLLOLLOL

Great to see you doing something that ain't measured in volts Steve. When you go back together, install a set of Ztherapy round tops and it'll put a big smile on your face! :ogre:

Good point Steve......Felpro makes a short valve seal that I use on my E31 head with the .490 lift Isky Stage III cam. It is supposed to handle up to .500 inch lift. Improved L6 Valve Stem Seals - L-Series - HybridZ You can use the stock valve seals on an .080 inch shaved P79 or P90 head because the valve springs are shimmed up .080 inches with the longer early L28 valves when you use the Isky Stage III (.490 lift) cam though.

I have the Isky Stage III in all of my Z's. It's a really nice regrind......good duration....no ping, but I run the P79 heads. When you install a regrind, install new rockers (IMO) and you'll have to geometry the cam ( wipe patterns centered with the correct lash pads). If you run flat top L28 pistons (P79), your compression ratio may be high enough to ping with the early E31.......not sure about that, but if you over bore, it'll be even more of a potential problem. The Isky Stage III makes nice power for me......I love it and Isky is great to work with. Sounds really nice at idle too.....that's important.

........I always use distilled water with anti freeze......no minerals and metals to feed electrolysis.

Use the early E88 head, install L28 valves and seats, then bore it out .040 inches, use an Isky Stage III cam and you should pick up 15 h.p. or even more.

Nice transition Zedy! Love to see things done right. The Datsuns sure look awesome side by side.

http://www.classiczcars.com/forums/engine-drivetrain-s30/34448-new-l-28-my-72-a.html Can't get any more specific than this.....plan on spending $4,500.00..

I agree with Jeff.....Many have ping problems with the N42/N47....."0" problems with the modern chambered P79/P90 head.....even when running as high as 10:1 CR......but, it does cost more to mod up the P79/P90.

Wow.....Looks like you sourced a really nice series I. Glad you're back Hardway!

Ditto that Steve! Are you sure you heard Dave right? Just by the fact that the head is shaved, assures you that you've got head gasket clearance at the least. My guess is he'd rather not go to the trouble to measure, shave .080 inches, then shim the springs and towers if he could avoid it by using the N42 head. Many, many people are using the stock and shaved P90 and P79 heads. I'm running four right now......absolutely love the combo.....no ping at any RPM either.

No Blue.....I've owned this car for 20 years. A low mileage 1990 300ZX in silver. A really nice car. Just toying with the idea of adding a little zip.....and I know nothing about working on fuel injection cars.

Thanks Jim for the lead.......