Buckeye Sprints, National race at Mid-Ohio this weekend Options

[groot]

I'm headed to M-O this weekend to race. Anybody else going?

I'm trying out a few things and uncovered a problem or two in the process.

For cooling, I'm running 2-3" ducts from the turn signal openings (one on each side)... I know many of you think it's not enough, but I'm willing to try it out before I run a huge duct.

I also replaced by EGT senders with some Westach parts. I was checking to see if they worked and oh, my..... they read a lot higher than my other senders did. I'm guessing the old senders were not the right calibration to work with my Westach gage.

I still have to do the alignment, I'm removing some camber to save weight.... (IMG:http://www.914world.com/bbs2/html/emoticons/idea.gif)

[ChrisFoley]

QUOTE (groot @ Aug 19 2005, 09:15 AM)

I'm headed to M-O this weekend to race. Anybody else going?

I wish I was going! I would have liked to score another 6 points (as if I could do that at the Buckeye Sprints (IMG:http://www.914world.com/bbs2/html/emoticons/rolleyes.gif) ) for a top 3 in my division this season.

QUOTE

I'm removing some camber to save weight....

(IMG:http://www.914world.com/bbs2/html/emoticons/laugh.gif)

I did some testing yesterday. With my horizontal cooling system it seems that cyl 2 runs much hotter than the others. My data suggests it is due to airflow under the car and into the engine compartment which alters the pressure differential through the cooling fins, especially at cyl 2. The differential grows with faster speeds. I have an oil filter and oil lines on the #4 side that interferes with the entering air, so cyl 4 doesn't get the same effect.
I plan to do some differential pressure tests with Magnahelic gauges soon, to verify my hypothesis.

I compared head temps with and without full tin surrounding the engine and the temps were slightly cooler without the tin. It may be that the air entering the engine compartment from under the car contributes somewhat to the available air entering the fan inlet.

BTW, I'm really happy with the power from my new engine with heads by Hoffman and assembly/tuning by Raby. I was about the fastest car on the track at NHIS (except maybe the Turner Motorsports BMW world challenge car). (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/driving.gif)
Max rpm I used was about 7800. Kick ass!!