Jump to content
HybridZ

San Antonio 3.1L Z


Recommended Posts

Ok,

 

Bought this 74 Z from the original owner in 1999. Strictly a weekend car. Always wanted a Z in HS but never happened. So, at 32 years old I decided to buy one. Original owner was a couple in Austin who both taught at UT. They tended to drive "his" car to work and the Z was not driven too much. I turned it over to 100K on my test drive. So, an original owner car with an average of 4K a year. No mods what so ever, except for floor carpet as floor mats. No sunroof, no stereo no anything added or changed. Well, actually 3 separate re-sprays of original color paint on the exterior and round top carbs.

 

After 8 years I got the upgrade bug and proceeded to read a ton and start buying parts. Here's the ongoing story. As I write this I've removed the old block and getting close to installing the new stroker. I give huge thanks to everyone on Hybrid Z for answering my questions and posting information that eventually helps me or someone else.

Steve

 

Here is the original window sticker to the car..

Window Sticker.pdf

Edited by steve260z
Link to comment
Share on other sites

  • Replies 76
  • Created
  • Last Reply

Top Posters In This Topic

The F54 Block which I purchased for $250.00 which included delivery to my door. High price but very easy.

Also the V07 Crank (And the car it came out of). After searching the local junk yards and finding no Diesel Maximas, I bit the bullet and paid around $500 for the crank. Ouch....Turned out to be in very good condition. Machine shop did very little to it.

My buddy had a gas Maxima in HS. Great car by the way. Can't say I ever knew anyone who had a diesel. Actually, can't even remember the car being produced for that matter..

post-8997-093892600 1322172929_thumb.jpg

post-8997-032007900 1322172944_thumb.jpg

post-8997-044538600 1322172975_thumb.jpg

post-8997-065415600 1322175720_thumb.jpg

Edited by steve260z
Link to comment
Share on other sites

I used the "240sx" Pistons and 9mm 240z Rods. Basically the same project detailed in this well known page: http://www.geocities.com/inlinestroker/index.htm Except for the fact I used a P90, shaved the pistons and used a thinner head gasket.

Once the pistons are installed they rise above the deck by .6mm. The machine shop shaved the "ring" or "dish" off in a lathe. End result was .6mm below the deck. Wow.. perfect.. At least according to the above page.

1st pic has the pistons installed before shaving and 2nd is after shaving. Block paint is a Ford Blue. Close enough for me. I've also attached an Excel which lists the piston weights.


Piston Weights Grams
4/15/2011

Piston #
1 466
2 466
3 467
4 465
5 467
6 466

2 not used: 465
468

post-8997-075118900 1322173793_thumb.jpg

post-8997-019220100 1322173813_thumb.jpg

post-8997-017686100 1322173838_thumb.jpg

post-8997-045279600 1322173850_thumb.jpg

Edited by steve260z
Link to comment
Share on other sites

After mulling over what head to use, I decided on the P90. Supposedly the best flowing or close to it, square exhust ports which will fit my headers from my E88 head and a non-open chamber design. Picked one up here on Hybrid. $100 bucks if I recall correctly. I'm using my Schneider Stage 2 cam from my 2.6L with springs, retainers and lash pads. Love how interchangeable all these Z parts are. The P90 arrived in great shape. No stripped threads and had not been shaved. Cleaned up great. Machine shop did a valve job, replaced a few valves, tested the springs all for about $100 bucks. 

The 1st pic is my E88 when I had it reconditioned a few years back. Note the open chamber verse the P90.

post-8997-071593700 1322174387_thumb.jpg

post-8997-002498900 1322176063_thumb.jpg

post-8997-091597100 1322176186_thumb.jpg

post-8997-015891100 1322182446_thumb.jpg

Edited by steve260z
Link to comment
Share on other sites

After doing all this I finally got around to taking the old engine out. Exactly, 1 year ago tomorrow I went to Habor Freight (F...ing junk) to buy the engine lift on Black Friday. $100 bucks. Within 11 months the jack was leaking, which had not been used and went back last month to buy the replacement jack. Another 50 bucks...

But, I've never removed, overhauled or rebuit an engine in my life, so I was fairly proud of myself in removing the old engine completely Solo! (With help from Tony D and others on lift points)

post-8997-059062700 1322175942_thumb.jpg

post-8997-003154500 1322176591_thumb.jpg

post-8997-007839300 1322181893_thumb.jpg

Edited by steve260z
Link to comment
Share on other sites

After getting the head back I checked the wipe pattern on all lash pads. All are centered. Not all are 100% the same but 9 are nearly identical and 3 vary slightly...Not much. Instead of perfectly centered they are about 55/45.

post-8997-001265900 1322183132_thumb.jpg

post-8997-074796900 1322183259_thumb.jpg

post-8997-091582500 1322183599_thumb.jpg

Edited by steve260z
Link to comment
Share on other sites

Nelsonian,

 

It will be to mine as well. I'm planning on it since I've never heard one before. I like the SU Carbs. Alot of talk about the sound of Webers...Its so humid and hot in SA that I'm thinking they just won't run well for 2 years until I get the tweaking dialed in with the weather.

Link to comment
Share on other sites

I'm considering buying a 3.0 stroker + SU's setup from a guy down here in Va. Up til recently I've never heard a stroker before but compared to stock L28's that I've heard, this car sounds scary mean! It pulls hard from 1st to 4th and is a blast to drive. I think you'll love your little setup here. Take videos when it's done!

Edited by forchunet
Link to comment
Share on other sites

  • 1 month later...

Well the Holiday's offered up additional time to work on the project.

 

I confirmed TDC with a dial indicator since I was installing a new Damper. Like some people have experienced, the damper is a bit tight. .001" of clearance. Jeez...I spent plenty of time sanding the damper bore down. Not to mention the timing marks are set on the opposite side. I believe the L4 engines have timing on that side but you would think MSA would have both styles.

post-8997-021400200 1325551405_thumb.jpg

post-8997-036458700 1325551439_thumb.jpg

Link to comment
Share on other sites

I'm installing a new timing gear set even though my old one still looked good. The "How to Rebuild.." book mentions a gasket for the chain tensioning housing which was not in my gasket set so I made one from cork. No big deal.

 

Next up is the front cover and Damper.

post-8997-036084700 1325551807_thumb.jpg

Link to comment
Share on other sites

  • 2 weeks later...

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


×
×
  • Create New...