1979 SA RX-7 LS Turbo Build (8.93 @ 153)

[forcefed86]

Threw my specs into a static/dynamic/compression calculator. Not 100% sure on the CC dish on the pistons. I seem to get different answers. One source said he actually filled the dish up with a syringe. Thats where I got the 9cc from.

So with the thicker ls9 head gasket, dished pistons, 317 heads, and ZR1 cam I'm looking at a whopping 7:1 dynamic compression ratio. It's gonna be a turd out of boost, but should be very boost friendly! Maybe even pump gas friendly...

[forcefed86]

Fuel cell is mounted. Safety vent installed with -8 return. Fuel pump mounted, lines ran. 1/2" SS hard lines along the length of the body. -8 braided for the rest. Regulator mounted.











Finishing up wiring...













WG dump tube finished.





Turbo drain done. 3/4" ID silicone tubing.









Mechanical guage for coolant temp ghetto rig....

[cyipher]

[/quote]

try again on the regulator mounting position, no track is gonna let that fly needs to be at a mininum 6" forward of the bellhousing... if you plan on taking this to a track ofcourse.

[forcefed86]

try again on the regulator mounting position, no track is gonna let that fly needs to be at a mininum 6" forward of the bellhousing... if you plan on taking this to a track ofcourse.

Thanks I was not aware... I'll move it. 

[forcefed86]

Decided to go with the 925 Odyssey battery. (22lbs) Didn't have alot of room left under the hood and I wanted the battery up front so I didn't have to deal with the battery boxes shutoff switches and 12ft of battery cable. Removed the charging lugs on the rear bumper and all the old wiring etc for the rear mounted battery.

Welded up a little angle iron battery mount and test fit the hood. Plenty of clearance. also wired up the alternator charge cable (2g) and ground wire. Got the upper and lower radiator hoses, steam vent, throttle cable, and IAT sensor done. Went with the cheapo "golden rod" filter again.  Installed and finished up the fuel return. Fuel plumbing is done. Also put longer lines on the FPR and plan to move it to the shock tower.

[digitalsolo]

Looks like she's coming right along.

[forcefed86]

Super expensive engine pre-luber. Set the shop air to 40psi and slowly opened the ball valve. We've got oil pressure! I used this same rig at 50 psi to clean injectors and check spray patterns. 

Hope to start it this weekend. Had a pinhole in one of theraidator inlets I welded on so it set me back a few days.

[zbrown]

Lolz looks like an IV

You know regarding the battery, i thought you needed a rear cutoff regardless of battery mounting for an 8.50 cert?

[forcefed86]

Lolz looks like an IV

You know regarding the battery, i thought you needed a rear cutoff regardless of battery mounting for an 8.50 cert?

I believe your right. I do still have the cut-off switch out back and I plan to run the fuel pump wire to it. I’m not running a check valve in my fuel system and when you shut the pump off the engine shuts down almost immediately.

 Not that it’s something to be proud of. but our local track tech isn’t very strict. I won’t be getting an 8.50 cert anytime soon. Still only have a roll bar.  I’ll keep the boost down and be happy with 10’s for now. I want to sort out the launch manily. With the ladder bar setup I think it’s going to be tough to keep the nose down. Once I’m confident it will go straight and not do moon wheelies I’ll finish out the cage and crank the boost up.       

 

[zbrown]

Moon wheelies, lol

I guess i was confused because i thought this car had a cert when you picked it up

[forcefed86]

I wish, just an 8pt. It ran mid 10's with an old wheezy NA SBC/th350 combo. Had to run wheelie bars to keep it down with that combo.

[forcefed86]

Still don't have a shop heater and fighting snow and cold weather in KS... but It lives! Horrible video I know. I'll get something better up soon.

It's kinda nutty but this video was taken with the fuel pump completely off. There is no check valve in the system. The large amount of vacuum and the huge injectors are pulling fuel from the tank all by themselves. Makes me think I have leaky injectors or something. I did pressure test all the injectors with fuel injector cleaner before installing with the same ghetto coke bottle rig U used as a pre-oiler. You can see how crappy the spray pattern was when I started. By the end they all looked nice and held closed at 40psi.



[URL=http://i17.photobucket.com/albums/b100/Hybridgnx/79%20RX-7/MVI_4985.mp4]

[forcefed86]

Rear main seal and the trans were leaking. Trans is back out.  I guess it was put together incorrectly, so I'm glad it leaked! Should have it back by friday.

Rear main seal replaced, and test ran the engine, no leaks there.


Third member is out. Confirmed it has the beefy 35 spline axles in it. Also bought some 3.10 "Ex nascar"  gears. They have been lightened and polished. Hope I'm light enough they don't break!








Ordered up some cheapo rubber isolators for the fuel pump mount. Made a HUGE difference. Pumps still too loud for a daily driver but I'd say it cut the noise in half.  These are pretty soft rubber though, I'm a little nervous they may not last long back there. You can see in the video the fuel pump moves quite a bit.

[forcefed86]

Trans and driveshaft are back in with no leaks.

Got the 3.10 "nascar" gears installed. ($130)

They are polished and lightened. 





Ended up with this Derale dual core trans cooler. 10x14.5. ($72 shipped) Tack welded an old grand national intercooler fan I had to it and mounted it in the back.





Went to town on some wiring... The pic is at a bad angle, its actually pretty neatly done. Center console has hinges on the bottom and swings out for access. WB02, trans temp, trans brake, fuel pump,  Rad and trans fan, and rear brake lights and turn signals all done. The "focus" lettering on the dash is  from teh old owner and will be removed along with all the other sticker BS on the car.






Used a cheap harbor freight aluminum air tool splitter for a vacuum block.



Very boring video of a turn signal.  Used a $20 golf cart universal signal kit. Had a built in brake light provision as well!
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Turbo blanket and oil line shielding

[WannaBeFast]

Lots of work man - good job, and keep on keeping on.