I ran my best ET ever with a 12.127 sec (60' 1.735) at 110.55 mph tonite @ Milan Michigan. Also, what was very interesting is my 3.5" MAF sensor & experimental air lid that I built myself. With factory MAF & air lid my best time was 12.277 sec (60' 1.800) at 110.35 mph.

Looking at the 60' times, this can explain the drop from 12.277 sec to 12.127 sec,,, so I have a bit to think about. I do know that the max engine load was 175 for the 3.5" MAF, while the factory MAF & air lid has an engine load of 254.

BTW: In June, I was running 113.5 trap speeds, so I am concerned about the 3 mpg drop,,, I cant explain it right now. The June runs were run with the factory MAF & air lid.

Rest of engine config is in my sig.

 

You may have just been running leaner due to the cooler weather. Computer might have detected a slight knock and pulled a little timing out up at the top end.

 

My scanner should a bit of knock, but no timing was taken out.

Please go over to the DIY Prom board to follow this thread, more tuning stuff over there.

 

I regret selling my superram, excellent all-around intake.

 

Have any pics of the air lid?

 

I have not figutred out how to post pictures on 3rdgen. So, I can send pics by email, let me know.

 

Send pics to mwc_hall@yahoo.com i just modded mine and im interested in what others have done.

 

Congrats on the new best E.T.!

Do you mind me asking what your race weight is on this combo?

Cheers,

-Schultzy

 

car alone is about 3450 lbf and I weight 215 on a good day!

MikeH: I will send photos this weekend.

 

Thanks.

Yeah good job...11s are so close just a little more tuning!

 

MikeH, I sent you a pic.

 

Thanks doc...good job.. just took a look at them!

I got a nice seat of the pants gain with mine as well.

 

Take off your front swaybar if you haven't already. That was worth some 60ft drop along with the lca brackets on mine. I couldn't get better than a 1.72 60ft before those two changes, with the best being 1.65 now and still getting a little spin after the initial hook.

I have found .2 tenths and 2 mph with changing shift points. Try shifting manually and raising your shift points. I always mph higher in the 1/8 and 1/4 when I shift higher than the tranny wants to shift at. I need to change the governer weights to go higher now, but I have a miniram and need to shift at 6500-6600.

I would think that you should still be maxing out the maf using the 3.5 inch sensor. I maxed out the wells maf with my 383 at 4500 rpm, so even with your superram, the cubes of the 396 should max it at the same rpm since you are swallowing more air each stroke.

 

One thing you could try doing with the larger home-made MAF is halving the injector flowrate in the bin. This will double the pulsewidth for a given flowrate. You can then treat the MAF flow tables as being from 0-512 gms/sec instead of 0-256 gms/sec. The resolution of the fueling will totally blow istead of just really sucking, but at least the ECM will be able to see the actual flow, assuming the MAF can. The whole 80's GM MAF setup was already in the gutter to start with, so fudging it to get what you want is OK in my book.

 

Of course I am maxxing out the 255 limit, hence the need to get an editor that can change the scalar values for me.

I an running 17.0#/hr in the Eprom with the 24#/hr injectors running at 52psi (27.53/hr flow, I think) so that the BLMs are close to 128. I believe that I an running out of fuel at 6,000 RPM. I am going to install 30#/hr injectors and install a higher flowing fuel pump.

I have been tuning the govenor (sp), but have not hit on the right sprints & weights, but I am getting close. I need it to shift at about 6,000 to 6200 RPM.

 

Even though your hitting the 255 limit at the MAF, its still probably reporting more then 255 gms/sec as its larger then the original and there isnt a bunch of junk inside of it. FWIW, the actual airflow its reporting is about 60% greater then whats in the tables if its tuned and the injector constant is set to 17 with those injectors. I think it would be worthwhile to get an LS1 MAF and a digital MAF converter and set the injector constant to half the flowrate. This will give you a true high flow system that can see up to 512 gms/sec of airflow, and it would be well worth it. I have the LS1 MAF and a 95 TBI PCM. Im using the PCM because the MAF can plug directly into it and read in the frequency. The MAF really gives a smooth running setup. Youll still have to use the 8 bit A/D to read the signal in with the TPI ECM, but at least you wont have to dink with the injector constant and other things to get the correct fueling. Total cost would probably be something like 300 dollars.