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-   -   my 20B porsche project (https://www.rx7club.com/20b-forum-95/my-20b-porsche-project-815969/)

chohakai 08-03-11 11:05 PM

Thanks for the update, Logan. Looks great!! It looks like your work will put mine and other backyard mechanics' into shame... This will be done right once and for all...

GtoRx7. 08-05-11 08:43 PM

I would say you did a great job for a garage build! We will just go through and streamline it for ya :)

GtoRx7. 09-13-11 11:56 PM

Finally getting a chance to post some progress pics. Here is the drysump plate fabricated, and installed on current engine setup to set new height. We were able to drop the engine down a good amount, almost 3 inches.


http://i254.photobucket.com/albums/h...a/DSC02015.jpg


http://i254.photobucket.com/albums/h...a/DSC02016.jpg

http://i254.photobucket.com/albums/h...a/DSC02017.jpg

Then made the new engine mount system. Went off the drysump front cover and lower pan plate. Made for a much lighter assembly, and easier for the times things need to be worked on. Not entirely finished, a few more reinforcements will be added to it. But that is enough to pull the engine out and tear down for inspection :)

http://i254.photobucket.com/albums/h...a/DSC02032.jpg

http://i254.photobucket.com/albums/h...a/DSC02034.jpg

http://i254.photobucket.com/albums/h...a/DSC02036.jpg

http://i254.photobucket.com/albums/h...a/DSC02035.jpg

chohakai 09-14-11 03:28 PM

Looking good, thanks Logan. Email or call me after you have the engine opened up...

GtoRx7. 09-22-11 09:44 PM

Engine removed and out of the car. Awaiting tear down for inspection and minor revisions


http://i254.photobucket.com/albums/h...a/DSC02037.jpg

http://i254.photobucket.com/albums/h...a/DSC02038.jpg

Everything looks normal and in pretty good shape. We will be going through the ports, smoothing some and adjusting port timing a little.

http://i254.photobucket.com/albums/h...a/DSC02039.jpg

http://i254.photobucket.com/albums/h...a/DSC02040.jpg

Normal side plate wear, we will be lapping all the irons to make it nice and perfect again.

http://i254.photobucket.com/albums/h...a/DSC02041.jpg

Typical wear marks all around the rotor housings from aviation seals. These will be getting the Goopy treatment and goopy apex seals to avoid further wear and tear.


http://i254.photobucket.com/albums/h...a/DSC02042.jpg

Looks like the front E-shaft had a bearing pinch at one time. Easy enough to smooth out, but scarred the front bearing on removal.



http://i254.photobucket.com/albums/h...a/DSC02043.jpg


Last rotor and housing dis-assembly.

http://i254.photobucket.com/albums/h...a/DSC02044.jpg

Fred, will be emailing you. Been so busy figured I would post it all first :)

RX-Heven 09-26-11 12:08 PM

The bearing pinch wasn't from the most recent build was it?

chohakai 09-26-11 03:02 PM

It was most likely our doing, we'd have seen that before the assembly. Obviously the needle bearing wasn't pinched when the motor opened up. I think it must've happened temporarily, when we were setting up to check the rear end-play or something.



Originally Posted by RX-Heven (Post 10801170)
The bearing pinch wasn't from the most recent build was it?


GtoRx7. 12-15-11 01:56 AM

I havent been accused of being santa claus, but this update might be a little like christmas :)

Making some paper templates for the frontal duct work.

http://i254.photobucket.com/albums/h...a/DSC02190.jpg

http://i254.photobucket.com/albums/h...a/DSC02188.jpg

http://i254.photobucket.com/albums/h...a/DSC02192.jpg

Transfered to steel, and slip rolled to get a nice curve

http://i254.photobucket.com/albums/h...a/DSC02201.jpg

All the parts TIG welded with only tacks for now

http://i254.photobucket.com/albums/h...a/DSC02202.jpg

http://i254.photobucket.com/albums/h...a/DSC02203.jpg

http://i254.photobucket.com/albums/h...a/DSC02204.jpg

Started to remove and sort through all the wiring. This is definitely working us. LOTS of organizing and soldering ahead!

http://i254.photobucket.com/albums/h...a/DSC02145.jpg

http://i254.photobucket.com/albums/h...a/DSC02148.jpg



So we finally got the irons back from lapping and the rotor housings were resurfaced by goopy (they were finished ultra fast as always).

http://i254.photobucket.com/albums/h...a/DSC02118.jpg

GtoRx7. 12-15-11 02:00 AM

First step was to perform the drysump modifications. Removing the legs internally to fit in the drysump suction tubes.

http://i254.photobucket.com/albums/h...a/DSC02112.jpg
http://i254.photobucket.com/albums/h...a/DSC02113.jpg

Then smooth them out to remove any burs

http://i254.photobucket.com/albums/h...a/DSC02116.jpg

Whenever lapping is done on irons, there is a small amount of debris from the grinding stones embedded into the surface. We take a few hours and use polishing compound on each iron. Rubing them together work out the leftovers.
Small detail, but important.

http://i254.photobucket.com/albums/h...a/DSC02130.jpg

http://i254.photobucket.com/albums/h...a/DSC02131.jpg

Next step was to mark and retemplate all the ports. Just to ensure port timing, and put a generous bevel on all the edges.

http://i254.photobucket.com/albums/h...a/DSC02137.jpg

As noted earlier in the thread, the bearings got a bit damaged. So we pressed in new ones that were the proper clearance for the rpm/power this engine will produce.

http://i254.photobucket.com/albums/h...a/DSC02138.jpg

http://i254.photobucket.com/albums/h...a/DSC02140.jpg

http://i254.photobucket.com/albums/h...a/DSC02141.jpg

GtoRx7. 12-15-11 02:03 AM

Will post the rest tomorrow. Sooooo many photos, and its really late!

rotaryB-2000 12-15-11 06:23 AM

very nice work

JWteknix 12-15-11 06:36 AM

sick

gracer7-rx7 12-15-11 12:49 PM


Originally Posted by GtoRx7. (Post 10900817)
I havent been accused of being santa claus, but this update might be a little like christmas :)


If you were really Santa, this motor would find its way under my tree :nod:

Nice work as usual!

chohakai 12-15-11 01:36 PM

Wow, it looks like Christmas is early this year!

Looks great, Logan. I knew you were the right man for the job all along.

The intake ports are pretty big, I did them as wide as possibly can, so be sure that they are not too wide (so that the side seals would fall into the port) and retain the bevel. Thanks!

GtoRx7. 12-15-11 08:25 PM

http://i254.photobucket.com/albums/h...a/IMG_3456.jpg
http://i254.photobucket.com/albums/h...a/IMG_3453.jpg
http://i254.photobucket.com/albums/h...a/IMG_3455.jpg
http://i254.photobucket.com/albums/h...a/IMG_3446.jpg


We also put the e-shaft on our crank polisher.

http://i254.photobucket.com/albums/h...a/DSC02152.jpg
http://i254.photobucket.com/albums/h...a/DSC02153.jpg

With the irons cleaned and painted, the rotor housings clean and coolant mods
performed, we set it all up for assembly.

http://i254.photobucket.com/albums/h...a/DSC02157.jpg
http://i254.photobucket.com/albums/h...a/DSC02159.jpg

Begining of assembly

http://i254.photobucket.com/albums/h...a/DSC02167.jpg
http://i254.photobucket.com/albums/h...a/DSC02171.jpg

GtoRx7. 12-15-11 08:27 PM

Assembled stack
http://i254.photobucket.com/albums/h...a/DSC02172.jpg
http://i254.photobucket.com/albums/h...a/DSC02173.jpg
Block off plates put on to keep her safe
http://i254.photobucket.com/albums/h...a/DSC02176.jpg
Front componets installed, note the drysump drive gear
http://i254.photobucket.com/albums/h...a/DSC02177.jpg
http://i254.photobucket.com/albums/h...a/DSC02189.jpg
The drysump needed some machine work. We removed material on the front to clear the belt path. Then I made the two notches to fit with the 20b front bolts
http://i254.photobucket.com/albums/h...a/DSC02180.jpg
http://i254.photobucket.com/albums/h...a/DSC02183.jpg
http://i254.photobucket.com/albums/h...a/DSC02182.jpg
Cover installed, and drysump suction tubes put in.
http://i254.photobucket.com/albums/h...a/DSC02194.jpg
Drysump plate installed
http://i254.photobucket.com/albums/h...a/DSC02197.jpg
New series 4 waterpump put on. Its a great looking engine :)
http://i254.photobucket.com/albums/h...a/DSC02200.jpg

GtoRx7. 12-15-11 08:28 PM

Putting in the engine to its final resting spot. Man Porsche really should have used mazda engines. So much better than a big wide flat 6.
http://i254.photobucket.com/albums/h...a/DSC02205.jpg
http://i254.photobucket.com/albums/h...a/DSC02207.jpg
Perfect fit, and much lower now with a drysump.
http://i254.photobucket.com/albums/h...a/DSC02210.jpg

GtoRx7. 12-15-11 08:39 PM

Dont worry Fred the port shape wasnt changed, we just blended and smoothed the bowls. The exhaust ports were all port matched to each other though :)

stokrx 12-15-11 09:27 PM

Awesome car. Awesome pics!

Thanks for sharing:nod:

13BT_RX3 12-17-11 09:24 AM

Car is looking good. It is funny how much room there is on the passengers side of your motor. What are you gonna use for your dry sump oil tank? I have a stock 911 tank if you need it. http://i123.photobucket.com/albums/o...1/P7160540.jpg

RX7(613) 12-17-11 01:10 PM

This build is looking great. Cant wait to see the finished work, and videos of it running at the track.

chohakai 12-17-11 01:46 PM


Originally Posted by 13BT_RX3 (Post 10903190)
Car is looking good. It is funny how much room there is on the passengers side of your motor. What are you gonna use for your dry sump oil tank? I have a stock 911 tank if you need it.

Thanks, homie! I have a modified stock one that I sent to Logan with the car, but he's looked at it and went: "p****, nahhhhhhh...". :D So we're going with a racing aluminum one, probably on the passenger side of the motor.

just startn 12-17-11 03:18 PM

Nice work logan.

Katizzo 01-09-12 10:38 AM

Subscribed!!! Great build and I'm a Porsche guy (just sold a 700hp 996TT) so this is making me want to do something similar!!! Loving my FD (13B) and had some wicked thoughts as well but you clearly beat us all to the punch with this monster idea!!!

Mr.Steve-O 01-24-12 06:30 PM

This has to be one of the sickest Builds that I ever seen..I cant wait till its done and see some footage!


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