forrestang
Member
Went to P&L on the 14 of July, seldom post here so I thought someone might be interested.
Nice place, good facilities. The guy let me get an hour, so I could get as many runs in as possible. And I could make any adjustments necessary as long as I got it done within that hour. The manager Paul said he'd estimate I'd hit 293whp, based on motor size and psi(really nice guy by the way). He said his dyno reads about 10hp lower than the other local dynos in Illinois...so he'd be surprised if I hit 300.
I told him I just wanted to hit 300whp.
I will posts the graphs up, he should email them to me Monday. I might try and snap pics with my camera to post?
Background:
I went to a different dyno about 2 months ago, but I had to make my runs immediately after sitting in rush hour, and strapped it down. Max, it made 288whp with the street tuned map. With the zeroed out map with none of my changes, the car made 240whp. So that map was worth about 44whp. None of this data is reliable as I dynoed in the absolute worst possible conditions imaginable. Just FYI.
Fast-Foward to 14July07
Anywayz.....First run I made, with the street tune, I made 297whp & 311ft-lbs. My A/F was super bad. The car spat a few times and didn't pull smoothly at all.
I made a few tweaks and added a few points of fuel. Next run was much cleaner, the A/F was MUCH cleaner, and I hit 311whp and 304ft-lbs max
I made a few more tweaks, next run was 313.35whp & 311.56ft-lbs. At this point, there is still something in my A/F that I didn't like. But it's still clean. I'm certain I could have gotten a few more poinies out of it, I jsut didn't have time. I will fix it later.
Good thing, I recorded everything with the standback. So I have tons of data recorded. it just needs to be posted.
I was looking at the dyno, and looking at where the car starts to loose power. You'll notice the first place in loss of power is right around 4800 rpm. On my logs, I am showing that thats where the throttle plate starts closing, a clear distint difference is in tps voltage as it drops below 4.0 volts.
The second place is where the car falls off pretty significant. This is about 5200 rpm. On my logs, the ignition is cut by about 30%. And you can see the power being cut accordingly.
Next, look at the dyno graph at 5700rpm, that when it picks it's power back up. The Ignition is back up slightly at this point. I'm not sure if the car is protecting itself, or if it's just something weird?
And the Boost controller function worked pretty good today, with my PSI set at 19psi, it just about hit it spot on. It should be ramping up faster, I think one size jet smaller than 0.047 will work nicely to remedy this. I have to order one as that was the smallest I had.
Unfortunately, for power production, there is a ceiling, and it seems to be a fueling problem? I don't see anyone hitting too much more whp than I have without some fueling resolution. Another Speed ownder with upgrades similiar to mine ran into this ceiling as well. I sent Jordan my data, and he posted this. The fuel pressure and injecter pulse width. You can see why my car probably started pulling timeing. You can see the two starting to diverge, as my car started to run into a fueling problem. The high pressure pump was probably done at this point?
Nice place, good facilities. The guy let me get an hour, so I could get as many runs in as possible. And I could make any adjustments necessary as long as I got it done within that hour. The manager Paul said he'd estimate I'd hit 293whp, based on motor size and psi(really nice guy by the way). He said his dyno reads about 10hp lower than the other local dynos in Illinois...so he'd be surprised if I hit 300.
I told him I just wanted to hit 300whp.
I will posts the graphs up, he should email them to me Monday. I might try and snap pics with my camera to post?
Background:
I went to a different dyno about 2 months ago, but I had to make my runs immediately after sitting in rush hour, and strapped it down. Max, it made 288whp with the street tuned map. With the zeroed out map with none of my changes, the car made 240whp. So that map was worth about 44whp. None of this data is reliable as I dynoed in the absolute worst possible conditions imaginable. Just FYI.
Fast-Foward to 14July07
Anywayz.....First run I made, with the street tune, I made 297whp & 311ft-lbs. My A/F was super bad. The car spat a few times and didn't pull smoothly at all.
I made a few tweaks and added a few points of fuel. Next run was much cleaner, the A/F was MUCH cleaner, and I hit 311whp and 304ft-lbs max
I made a few more tweaks, next run was 313.35whp & 311.56ft-lbs. At this point, there is still something in my A/F that I didn't like. But it's still clean. I'm certain I could have gotten a few more poinies out of it, I jsut didn't have time. I will fix it later.
Good thing, I recorded everything with the standback. So I have tons of data recorded. it just needs to be posted.
I was looking at the dyno, and looking at where the car starts to loose power. You'll notice the first place in loss of power is right around 4800 rpm. On my logs, I am showing that thats where the throttle plate starts closing, a clear distint difference is in tps voltage as it drops below 4.0 volts.
The second place is where the car falls off pretty significant. This is about 5200 rpm. On my logs, the ignition is cut by about 30%. And you can see the power being cut accordingly.
Next, look at the dyno graph at 5700rpm, that when it picks it's power back up. The Ignition is back up slightly at this point. I'm not sure if the car is protecting itself, or if it's just something weird?
And the Boost controller function worked pretty good today, with my PSI set at 19psi, it just about hit it spot on. It should be ramping up faster, I think one size jet smaller than 0.047 will work nicely to remedy this. I have to order one as that was the smallest I had.
Unfortunately, for power production, there is a ceiling, and it seems to be a fueling problem? I don't see anyone hitting too much more whp than I have without some fueling resolution. Another Speed ownder with upgrades similiar to mine ran into this ceiling as well. I sent Jordan my data, and he posted this. The fuel pressure and injecter pulse width. You can see why my car probably started pulling timeing. You can see the two starting to diverge, as my car started to run into a fueling problem. The high pressure pump was probably done at this point?
Attachments
Last edited:
