442whp SR20vet vs 3.0 +dyno sheets

[Ondonti]

http://videos.streetfire.net/video/SR20vet-Sentra-vs-6g72_197806.htm

I messed up the shift on the first run. The last two runs I brake boosted and the last one I was running 10 psi on the hit (boiled the brakes too).
I dont think there is any way he could keep up when I have 10psi on the hit

he kept increasing his boost but it didn't help cause I kept driving better.

We were tuned for 17psi boost on 12.1:1 fuel ratio but the fuel pump wiring seems to have crapped out on the way to the race and we had to turn the boost down. It was still lean!!! 14+ air fuel ratios!

He was so emasculated that he called his buddy to open the dyno shop cause he thought i was cheating and running more boost.

Remember these are with lack of fuel and cam gears advanced 4 degrees because I thought that would help my powerband until I can rev past 6200.

The dyno proved I was out of fuel!!!!!!
13psi pull
Look how power hurts when it leans out. I dont think the HP peak is real, but its because there is just no more fuel!
http://img504.imageshack.us/img504/7620/correctedqq8.jpg
15psi OH DANG! Lost power!
http://img133.imageshack.us/img133/5517/correctedhighboostkl7.jpg

These are corrected numbers so I dont take them seriously. I think I can do 384 real HP easy if I fix the fuel, take the cams back to stock, and rev over 7. All on super low boost.
The real number is only 332hp and 325hp. Stupid altitude.

I would like to build nicer tubular manifolds and fix the top runner size on my intake manifold but these numbers make me care a lot less about that at low boost.
2 valve heads for teh loss!

[trev0006]

Did you ever fix this problem, also what octane fuel where you using.





http://videos.streetfire.net/video/SR20vet-Sentra-vs-6g72_197806.htmtires (http://www.discountpartcenter.com/)cars (http://www.dpccars.com/)

I messed up the shift on the first run. The last two runs I brake boosted and the last one I was running 10 psi on the hit (boiled the brakes too).
I dont think there is any way he could keep up when I have 10psi on the hit

he kept increasing his boost but it didn't help cause I kept driving better.

We were tuned for 17psi boost on 12.1:1 fuel ratio but the fuel pump wiring seems to have crapped out on the way to the race and we had to turn the boost down. It was still lean!!! 14+ air fuel ratios!

He was so emasculated that he called his buddy to open the dyno shop cause he thought i was cheating and running more boost.

Remember these are with lack of fuel and cam gears advanced 4 degrees because I thought that would help my powerband until I can rev past 6200.

The dyno proved I was out of fuel!!!!!!
13psi pull
Look how power hurts when it leans out. I dont think the HP peak is real, but its because there is just no more fuel!
http://img504.imageshack.us/img504/7620/correctedqq8.jpg
15psi OH DANG! Lost power!
http://img133.imageshack.us/img133/5517/correctedhighboostkl7.jpg

These are corrected numbers so I dont take them seriously. I think I can do 384 real HP easy if I fix the fuel, take the cams back to stock, and rev over 7. All on super low boost.
The real number is only 332hp and 325hp. Stupid altitude.

I would like to build nicer tubular manifolds and fix the top runner size on my intake manifold but these numbers make me care a lot less about that at low boost.
2 valve heads for teh loss!

[Ondonti]

The fuel filter was 16+ years old and completely collapsed. Replaced the filter and went back to the same dyno and 20psi. Felt pretty smart on that one. :p Its possible that the clogged filter did not decide to collapse until the day that we were messing around and dynoing because the fuel was good the night before.
The tank had been cleaned out 2 years before so there was not a lot of stuff to all of a sudden clog things up. My guess is that the fuel pump pressure relief was opening up because the pressure before the filter was well over 120psi. http://i546.photobucket.com/albums/hh426/ondonti/No%20racing%20tonight/IMG_4336.jpg
http://i546.photobucket.com/albums/hh426/ondonti/No%20racing%20tonight/run5c.jpg

It also appears that the tactic of running lean then hitting the alky at around 7 pounds of boost actually slowed down the spool of the turbo a LOT.
Look at the old dyno, 265whp @ 3500 rpms vs maybe 175whp @ 3500 rpms..
And the old dyno spooled 500 rpms sooner.
I never really compared much before because the power was so different. Thinking that peak torque would be a lot more with a proper tune.

Thats probably another reason why the car feels faster on Megasquirt, no ghetto tuning.

EDIT, I am remembering that some of the sloppy power and slow spool are because I was rolling into the throttle insteas of going WOT.

[Ondonti]

These next 2 are my first 2 pulls and I get spark blowout so I regapped the plugs to .25 (from .30-32 or whatever)
http://i546.photobucket.com/albums/hh426/ondonti/No%20racing%20tonight/run1c.jpg
added timing, me stupid. Not a real power gain, it gets super choppy because increase timing increases cylinder pressure, making it harder for the plugs to fire. I should have removed the timing. It probably also pushed a little coolant on this pull.
http://i546.photobucket.com/albums/hh426/ondonti/No%20racing%20tonight/run2c.jpg
Then a clean pull with the boost backed off a tiny bit. Ran good, no coolant push.
http://i546.photobucket.com/albums/hh426/ondonti/No%20racing%20tonight/run3c.jpg
Half a pound more boost, from 19.75 to 20.25 or something like that.
http://i546.photobucket.com/albums/hh426/ondonti/No%20racing%20tonight/run4c.jpg
http://i546.photobucket.com/albums/hh426/ondonti/No%20racing%20tonight/run5c.jpg

[rx2mazda]

Nice numbers and plenty of power under the curve(or plateau). Is this with the MS?

[Ondonti]

Thats a bone stock 1 bar MAP ecu. No timing control, no fuel control, just RRR and tons of meth (for fuel, not octane, I tried E85 but gasoline kills meth pumps) and 91 octane. 48 degrees of timing, but it really needed more like 40 degrees :P
7.0:1 motor didn't need one bit of octane even with the oil it was burning.

The big leanout is at about 7 pounds of boost, which was where I set the 2500cc's of 100% meth to start turning on. I had hoped for quicker spool but that didn't help. I think the 2nd bump means the meth went full on.
Without methanol, the car leans out bad up top because the OEM VE curve drops off above 5000 rpms.

The huge amount of methanol actually helped keep the AFR happy as RPM's went up. When I ran 5-10 pounds of boost, and had no methanol spraying, it would lean out bad so I had to run it rich down low so it wouldn't blow up top. It would jump a full point or more of AFR from 4000 to 6000. Nothing you can do about it with stock ECU.

That is also with Cam Gears advanced 4 degrees to kill top end VE, to prevent it from leaning out more then it already wanted to.
Thats why the car felt so fun when I did my first MS installation and set the cam gears to zero, and why the stock heads right now with my old regrinds from recently repaired ported heads, rip to 7000 rpms even at 140mph in 4th as the valves just begin to float. .
Maybe I will get a megasquirt dyno this year If I get any projects done. No interest in dynoing with the stock heads and floating valves.
Planning on reving to 8000 or 8500 if I get my valvespring setup done. Already the first person running the solid rockers. Depends where it stops making power, and if a bigger cam helps, etc.
I figure I can get 4000 rpms of big power. The turbo is a lot more responsive on Megasquirt because I can optimize things.

Ghetto fuel sucks. So many headaches. Now I just datalog and change data points. My only real worry is always making sure the Meth system is working. I really need a pressure gauge and warning light for it.