Oldies

Body off!

Finally got the rear cage support tubes done and the body could be lifted off. Now the chassis is off to welders and they will probably add rest of the tubes. Floor tubing might change even if the current plan is approved by inspectors of FHRA. SFI 25.4 floor specs are with two main tubes in the center.

Here's a video of the 10.81 run from BRC.

http://www.youtube.com/watch?v=L91wA_lAxIQ&feature=youtu.be

Bug Run Classic 2013

We, Valtteri with his split, Heebah with his trusty old street car and Make the mechanic, head off to Stockholm on wednesday evening and arrived to rainy Tierp late in thursday afternoon. After a while BRC organizer Lena arrived and made a few phone calls and we got in to Arena, so we had plenty of time to put up our tents and set up a depot and enjoy the evening.

On friday I had enough time to strip the interior, heat the oil and do some fine tuning, like add few more degrees of advance, raise the rev limiter a bit higher and such.  Then at the first run the transmission got stuck at the second gear and the time was something 16.xx and I thought that was it. After a few calls to Alho-Matic we figured that there's not much to be done if we can't fix it through the oil filling hole. Thankfully transmission specialist Janne was there to fix that and Jari and Jukka were putting the rest of the car together. Something was bent as there is no reverse gear but that didn't matter at all. I couldn't drive more on friday as there was some oil spills at the track so I had to wait until saturday.

First run on saturday resulted new bp 10.96 @ 196,5 km/h and hitting the rev limiter at the end. For the second run I raised the limiter again and that did it. Time was 10.81 @ 200,7 km/h and I never thought 200 km/h was possible with 875kg all steel street car. I must have gained 20 - 30 hp since the dyno session by changing the velocity stacks, straight exhaust and ignition advance. The engine started to spray oil from the valve covers so I thought I'd better stop while everything was still OK, as Heebah had broken his car on friday and had to be taken back to Helsinki with a trailer. I had to drive my car in to the ferry so I did not want to risk anything. Mission was accomplished.

I do not think there's much more to be done as I do not want to cut the car. High 10 and over 200km/h is definitely not bad for a true street car and cutting just hundredths is not my thing. I will see if the engine gets a new life in the tube chassis or not.

Our "team" at Tierp Arena with amazing sky. Valtteri did great for first time at the track with his split and popped a whiilie right away. Heebah got new bp before breaking hockey stick.

Paper to prove.

Back at the ferry.

  

At last I got the back half tubes done, thanks to Tami Brander Racing. I also got the missing 1" tubes from him and the chassis is ready to be welded once we get the body off. Then I will take the chassic to my own garage and add rest of the tubes.

Nice plywood jig.

Chassis should now be strong enough to be taken off from the table and get welded.

And the current car got new velocity stacks, 80mm longer than the old ones based on the calculator. At least they're golden, if not adding any power... I also made new straight exhaust without muffler, but that's just to scare the norwegian competitor this friday at Tierp.

Dyno time

Once again I went to map the car as it run really rich after changing the old tired Malpassi fuel pressure regulator to Aeromotive. At Street Slide the lambda was 0.71 from 5500 - 8000 so it really needed some tuning. During the day the power went from 260 to 281 so it's still not where it should be. Power is not dropping dramatically after 8000 and that really is a good thing. If I have the energy I'll try different intake and exhaust lengths or then I might just give up and go and charge the engine somehow. Or make the Datsun finally driveable instead.

This is not even whp but calculated power with 6% driveline loss. So with 265hp at the wheels there's no chance of going 10's with such a tank. But it doesn't stop me from trying.

40kg's of steel waiting to be welded. It's probably hard to see but these are parts for the rear hub housings and mounting tabs for the chassis.