Beech Bend Raceway Park, Tues Nite Drag (9 / 9 / 2008)
 

Trailblazer 28 lb. injectors, Walbro in-tank pump, M&H 7.5 in. slicks, Autolite 104's gapped to .040, 70 deg. F.


1) 13.293 @ 101.89, 1.926 60 ft.
"Semi-street trim" -- conservative tune, air filter, muffler installed.

2) 13.539 @ 100.40, 1.971 60 ft.
removed muffler, filter bypassed, minimal cool-down

3) 13.472 @ 101.50, 2.016 60 ft.
same as 2) , longer cool-down

4) 13.492 @ 101.14, 1.993 60 ft.
good cool-down, forgot to switch trans line pressure

5) 13.365 @ 102.77, 2.031 60 ft.
same as 3) , +3 deg. timing at WOT

As you can see, the first run wound up being the best of the night, with the air filter and muffler installed. The reason for that is the Trailblazer 28lb Injectors reached their limit at that point, but I did not realize it.

So I took a step in the wrong direction as far as tweaking the setup, removing the air filter. This did provide substantially more airflow, of course, and that showed up in the scans, the max MAF reading went from 34 lb/min in the first run to 37 in the later runs. And the Injector Duty Cycle increased from 108%, which in hindsight appears to be their practical useful limit, to 118 %.

The system went slightly lean at the top of each gear, and that was reflected in the o2 readings, but I did not catch it till after the session. There had been little or no KR in runs 3 and 4, so I added 3 degrees of timing at WOT for the last run, which did get a much better MPH, and decent E.T.

What I should have done was keep the street setup, and added the timing on the second run, then possibly could have seen a 13.1. But all in all, it was a fun session..... I'll call it a success after I make it back home :)

absolutely bad ass..

What the hell are you doing in Kentucky when you live in Denver?

Crap, I almost forgot ... Great Job!

I lived here for twenty years....My mom still lives here, she won't move to Denver...:)

under hood shots!

Splains it. How long are you there for? I almost thought about going there this week on vacation and then work got in the way. I love it down there. The track is antiquated but then so am I.

no can do, it's even worse now than when I first started posting, but it hasn't changed much, see the thread: "Current Pictures."

christ all mighty.. that is a big ass supercharger :wtf2:

Just a couple more days....... the track is in an oxygen-rich area :).... got in and raced all for $15.00..

They had oval track racing going on at the same time.

Not really.. Basically the same one a Cobalt would have. It's all the other stuff that makes it look big.

Oxygen rich at our age according to the yungins on here is good for us at our age.:lol: $15, you should be arrested for grand theft.

Good job man.

Updated in the Fastest Alero thread too. ;)

nice job Greg!!!

really nice setup, supercharger all the way:coolio: