Seawulf
07-18-2003, 06:09 PM
That's what she did before it went BOOM. This was at 9psi and a 35 shot of nitrous and 50 shot of gas. It didn't blow on that run, just misfire a bit with what the tuner suspected was a bit too rich and to much timing pulled. It also hit 1500F on the EGTs at 6000rpm so I backed off then. We were also pulling about 4.5 deg of timing off the base 9psi tune to be safe on nitrous. The tuner felt it might be a bit too much timing pull and so I decided to run it on the base program with timing for 9psi to see what would happen...famous last words. Not a second into the nitrous the engine blew. I wish I had recorded it on the video, cause it was spectacular. Smoke pouring out of the engine bay and out the tail pipe, and the engine still idled until I shut it off 10 seconds later.
Before the nitrous run it did about 210whp&215wtq at 9psi after about 47 dyno runs. At 7psi it did just under 200whp and just over 200wtq. I got there at 9:00am and the engine blew around 10pm on the 49th dyno run. Stock block and stock clutch with 52000mi. Biggest worry before it blew was massive blow by out the valve cover vent. At least a 1/3 of a quart total, but the car was a little over full by 15% and on the dip stick it showed barely a 1/4 qt low. All 4th gear pulls to 6500rpm.
All in all it was a ruff tune. The StreetFlight guys said they'd never seen a stock ECU like mine. Then we had to wait an hour or so to get the right base map so they could tune my car, had to wait while Keith sent email feelers out to his tuner network. Then the first dozen runs were done just to get a safe tune to take the car to the redline and then fine tune it after that. Then between each tune they had to take out the chip, reprogram it, then write the program back on the chip, reinstall it in the ecu then run the car. Definetly glad I didn't try to get a chip through the mail.
I'll post the dyno charts later, you'll need the dynojet view to see them, I'll post the link to all that in a few days. All in all the guys at StreetFlight were great and went the extra mile to try and get me going. They'd just never seen a program like mine or done a tune like this, that and fatigue by the 10 o'clock hour lead to laziness on my part to try the nitrous.
I'll probably just try to get a new/used stock block and swap it out and run the base programs they put on the chip. If I get a misfire under nitrous, better that then deto and an engine blow. These runs were also done on 91 oct, Arizona is bone dry in that respect and New Mexico and parts of I10 in Texas, couldn't get 93oct anywhere past 100mi from home.
Laters, untill next time.
Before the nitrous run it did about 210whp&215wtq at 9psi after about 47 dyno runs. At 7psi it did just under 200whp and just over 200wtq. I got there at 9:00am and the engine blew around 10pm on the 49th dyno run. Stock block and stock clutch with 52000mi. Biggest worry before it blew was massive blow by out the valve cover vent. At least a 1/3 of a quart total, but the car was a little over full by 15% and on the dip stick it showed barely a 1/4 qt low. All 4th gear pulls to 6500rpm.
All in all it was a ruff tune. The StreetFlight guys said they'd never seen a stock ECU like mine. Then we had to wait an hour or so to get the right base map so they could tune my car, had to wait while Keith sent email feelers out to his tuner network. Then the first dozen runs were done just to get a safe tune to take the car to the redline and then fine tune it after that. Then between each tune they had to take out the chip, reprogram it, then write the program back on the chip, reinstall it in the ecu then run the car. Definetly glad I didn't try to get a chip through the mail.
I'll post the dyno charts later, you'll need the dynojet view to see them, I'll post the link to all that in a few days. All in all the guys at StreetFlight were great and went the extra mile to try and get me going. They'd just never seen a program like mine or done a tune like this, that and fatigue by the 10 o'clock hour lead to laziness on my part to try the nitrous.
I'll probably just try to get a new/used stock block and swap it out and run the base programs they put on the chip. If I get a misfire under nitrous, better that then deto and an engine blow. These runs were also done on 91 oct, Arizona is bone dry in that respect and New Mexico and parts of I10 in Texas, couldn't get 93oct anywhere past 100mi from home.
Laters, untill next time.