SOB Racing 87 with a 4G63

[SOB Racing]

The whole rear is urethane bushing except the rubber in the pinion mount.   Although do you mean in put urethane in the link bar?    I guess I could turn some on the lathe or just go with a solid link.   

 I thought about just making a solid mount but I'd have to beef up the mounting tab on the subframe as well.   The rear whine is already pretty loud too, especially after I added the pinion mount.

I'd post the clutch deal as I build it.

Engine management is an Swede Density code ECU code. tuned in Tunerpro hooked to an Ostrich connected to stock ECU. 

[forcefed86]

Yup I meant in the link.

I was using Jackal and then the upgraded "Werewolf" which was basically the same... ostrich and all. The Werewolf designer setup the VSS as a trigger for a 2-step rev limit using the VSS signal. (retarded my timing as well) So it's possible with the factory code/ecu. 

[SOB Racing]

I forgot you were from the DSM world...    I used Jackal too for a while.   Hated the fact that you can't copy and paste tables.   Worked well for what it is.

2 step is controled by VSS in Swede too.   I can talk to the Swede Code guy and see if he can write something.

[DarkMx-6]

Pretty cool build, I don't have nearly the fabrication skills you do but we ran into many of the same problems and same solutions. People don't realize how easy it is to bolt up a 4g63 or almost any mazda engine to a RX7 transmission.

I'm putting in an F2T engine from and mx6. Planning on more or less 400hp

My build is currently in the works but is getting pretty close. I'm installing my custom exhaust manifold and soon my custom intake manifold will be done and ready to install.

got any videos?

[SOB Racing]

I don't know how "easy it was" but it definitely fit in there nice!   

[DarkMx-6]

I only said that the easy part was bolting it to the transmission the rest is, eh...well you know. LOL

[uummm]

Bolting a 4g motor to the mazda trans is easy if you have a wideblock and can find the right bellhousing.  Glad to see how well yours is doing, it is getting me excited to finish mine.  I have a few more parts to collect before assembly, hopefully I can have it running by spring.

[SOB Racing]

Yeah...I was never able to find a wideblock.  Been looking for a normal 6 bolt narrow block on and off for a while and can't find one of those. 

 

[SOB Racing]

Been work on my son's 944 project and finally getting around to my junk.

Made up a order for my clutch slipper controller,  just need to call Summit.

Picked up a craiglist motor that I kind of got fuc'd on.
Motor had Kelford cams, upgraded springs and EVO 8/9 pistons
Except the head had garbage in it and wiped out the cam and head.    Luckily I pulled the motor apart to check it before swapping it in.


So to salvage what I could, Block was just honed, pistons and rods checked at machine shop.    The 6 bolt rod have ARP bolts.   Crank seems fine, on spec

Prepping the block for paint.


My favorite color


So the original plan of bigger cams is still out there and eventually a Holset turbo.   The EVO pistons I'm still digging around to see if there a "upgrade".   Seems like no one has done them recently.   Any DSM guys on here are welcome to chime in on them.



This past weekend project. Convert Awd thermostat housing to fit RWD configuration in Rx7. Had a unused port split a plug and dump water on the starting line last year...not again. Turned Al slugs to fill all unused ports. Water neck is cut and reangled to a more horizontal and 90 degree to block to miss firewall.   Still need to check for leaks, fought porosity issues with these 25 year old dirty cast parts







Turned slugs to seal holes

[SOB Racing]

Parts came in for my clutch slipper build.    Fragola...Pandora for men!

[SOB Racing]

Black Betty had a heart attack apparently on her last drive. Post mortum shows 130-135-128 and 80 psi compression on #4. adding oil to #4 makes no difference so cracked ring?

[SOB Racing]

Cracked both ring land on #4 piston.   8(

[forcefed86]

Doh! That's a stinker... Too much timing? Seems odd it would break there at your power levels. 

How did the slipper clutch setup turn out?

[SOB Racing]

I need to look at the tune and see where the timing's at, I might of raised it up last year (on race gas) and never changed it.

Slipper clutch was mocked up and sitting on the bench ready to go in when I broke the motor.   I'm going to finish installing it while motor parts are at the shop.

[SOB Racing]

Racing Gods hate me.   Went to put my shortblock together and found a nick in the bore not sure if the shop did it and I didn't notice or I dropped something in there.   Either way it's too deep to hone out so I'd have to bore it.

So now I have to find a new set of pistons.