240Z SBC E36M3. Lookie lookie!

peej410 wrote: It melts the slicks off in second and third from a roll.

My favorite sentence in this thread!

SCCNH is running an autocross event on Friday for ZCON....

Peej, I'm also a member but I haven't attended anything in at least two years. The fall meet is usually pretty fun so I might try to attend. Perhaps I'll see you there. I have a black '82.

Dave, it was far too late for me to head up this year, too big a back log of jobs to finish.

I did spend most of today making some more upgrades. Ill load photos soon.

Tuna, I am glad you approve! I will try to get video as soon as this thing goes straight under power.

Mike, it would be great to meet. I havent been to a car meet since I was in college! (12 years) Maybe its worth trying out again.

So the car was still way sloppy under power.

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Pulled the subframe. Pressed the bushings out.

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Cleaned up the ID

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Made some disks

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Fired up the tig.

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Did some crappy passes at 2am the other night

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Welded some sleeeeeeves in wooo

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Grindy grindy

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Subframe becomes stressed member.

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I really need to prep more before I paint stuff.

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At a cruise after everyone started bailing.

I attended a local autocross here is the on board video http://youtu.be/ivGb83eiFiA

No input on the video?!

http://youtu.be/ivGb83eiFiA

peej410 wrote: No input on the video?! http://youtu.be/ivGb83eiFiA

Looks good, I got dizzy on all those curves however.

peej410 wrote: No input on the video?! http://youtu.be/ivGb83eiFiA

Try sticking the camera to the quarter glass behind the driver's door next time, this way you can see a wider angle ahead of the car and see what the driver's doing like this

Oh and the car sounds really good BTW. On that G scale, is the outer ring 2Gs?

I believe that when the cursor turns yellow, it represents one G. Im heading to the track monday. We will see how she does!

I put a gopro sticky on my quarter window. . . it stayed there for 2 years!! for some reason the curved mount bites hard on the S30 quarter window. so well it is a real chore to get off. believe that when me sheet turns purple

My corner windows are lexan. I can try it but they dont fit all that well.

ahh, that makes more sense now

Update.

The autocross run was a good test bed for the way the car was and showed me that I needed to change a lot to make it easy to drive around LRP Monday. Hopefully the car is less menacing now. It was a handful at the AX. I did a telemetry run under throttle before tearing her back apart. Under acceleration less than ever .5 seconds the car jerked from one side to the other exceeding .7g and averaging .4g. The twitchiness is what i hope to remedy with all this modified geomtetry. Also, ill be installing a 325i rear sway bar for the event to tame the rear some more.

First things first I intentionally took some camber out of the front by shortening the arms. The control arms were too long (early fab error) making 3.5deg of camber the minimum.

There is still quite a bit of bump steer (1/8" over 4" of travel) but it will have to do for now.

I also shortened the rear upper control arm by 12mm this changes the camber gain rate in the rear. It picks up a full degree of camber in bump now (which is only 2") allowing me to run the tire flatter static and more camber than i had max dynamic before. It should allow it to put power down in a straight line and grip better mid corner.

Stay tuned ill have her on the road some time Friday-Sat then heading out for carb tuning on the street

Heading to the track in the morning. Been busy messing around making tons of changes. Hopefully I dont die. Wish me luck! Videos to follow

Good luck!

Holy carp! Can't believe I didn't drop into this thread earlier... Massive mistake on my part...

Beautiful work! Good luck at the track!

As promised,

http://youtu.be/3O55MU76tFQ

First thing in the morning I spaced on the fact that I hadnt set the brake bias yet. Following a fellow instructor a handful of laps in I braked deep into big bend (like i do with my M3) locked the rears briefly then went into a long tank slapper followed by four clockwise 360s. The right front tire hopped up over the inner curbing in front of the T1 work station. Before I even came to a stop I had it in 2nd gear and was back on the throttle. Close call about 8 feet off the wall!

I brought it in after that to take a breath and collect myself. I took it easy the rest of day. I did get to floor it a few times (this video) which was fun!

These are my impressions.

Shorter front struts so I can get to the ride height I designed the suspension for. Only has about 1.5" of bump travel now. This way it can properly load the front tires under braking without lifting the rear to the point that its near full droop. Its only an inch but if you ask the ladies every inch counts.

It needs more roll stiffness in the rear, it feels like the outside tire is folding in underneath you not like its supporting the car.

It needs spherical bearings in the rear. On corner entry and corner exit the rear wheels toe in and toe out however they want to. The powerflex bushings deflect by hand. I bet with an 11inch wide slick and 2700lb of car at 1g is greatly changing the rear toe making it very difficult to exit corners under power.

It needs to be properly tuned. I will get to this over the next few weeks. It bogs at heavy load and 2500rpm.

It needs a steeper ratio diff. Coming into the left hander I am in the bottom of third. Entering big bend im barely at 4500 in 4th. 3rd gear lasts till after Pit in on the main straight (in my M3 i nearly redline in 4th on the front straight)

It needs a larger steering wheel. No power steering and a lot of hot rubber makes it a bear to turn hard below 60. The left hander is exceptionally challenging.

The fuel cell needs to be lowered. Exiting the essess onto no name, you can see the car kick left. Thats the fuel sloshing. (My M3 doesnt do this and I drive it way harder) I may just build a new cell from scratch with baffles and better pickup.

It is definitely still down on power because the AF ratio is still in the 11s down on power from poor combustion means lots of crankcase pressure from unspent mixture passing by the rings.

I have always built cars by a certain philosophy. If the driver is not confident he cannot go fast. When I am done with it, it will be very fast.

Looks good!

hahah looks like a ball

peej410 wrote: Shorter front struts so I can get to the ride height I designed the suspension for. Only has about 1.5" of bump travel now. This way it can properly load the front tires under braking without lifting the rear to the point that its near full droop. Its only an inch but if you ask the ladies every inch counts.

Nice. 8)

Keep us updated!

I fixed the video link. Its much better unstabilised.

Too bad you had to take it easy on the brakes, looks like it's quick on the straights and corners. Much better camera placement in this vid.

This time i attached the camera to the back glass. Since Harrys auto starts when you cross start finish, it works well.

Does anyone know how to export and overlay an entire session with Harrys Laptimer? I searched but none of the explanations involved roller cams or spring rates so I had no idea what they were talking about.

I got an update for you guys. Just a quick video from outside the car on track taking it easy at LRP

http://www.youtube.com/watch?v=jWDNDzsESLI

Happy Holidays!

Awesome car!