38 HORSEPOWER AND MORE TO COME!!! Dyno sheet attached...
#136
Pole Position
Join Date: May 2001
Location: International
Posts: 316
Likes: 0
Received 0 Likes
on
0 Posts
The aluminium intake and pod was not tested for fuel economy. Tested against stock standard intake on dyno.
BFI gave me the best fuel economy - sucking in hot air was terrible for economy.
When cruising with the BFI the the whole intake is charged, the restriction of the filter and AFM is completley negated - this will only happen with an airtight intake, cool breeze and heat shield types will not seal air intake. If you can see any gaps then it is not a sealed system.
Only a manometer will test if it is sealed and if the car gets enough air under full throttle - anything else is guessing.
You should get 2 inches of water pressure inside intake when rolling at 60 mph. This is the maximum possible.
You want to avoid any vacuum with wide open throttle.
The BFI could not be tested on dyno- the car is not moving - the dyno room fan is not sufficient. We have a guy over here with the new Apexi RevSpeed meter and g sensor - will attempt to measure before and after BFI on road performance.
BFI gave me the best fuel economy - sucking in hot air was terrible for economy.
When cruising with the BFI the the whole intake is charged, the restriction of the filter and AFM is completley negated - this will only happen with an airtight intake, cool breeze and heat shield types will not seal air intake. If you can see any gaps then it is not a sealed system.
Only a manometer will test if it is sealed and if the car gets enough air under full throttle - anything else is guessing.
You should get 2 inches of water pressure inside intake when rolling at 60 mph. This is the maximum possible.
You want to avoid any vacuum with wide open throttle.
The BFI could not be tested on dyno- the car is not moving - the dyno room fan is not sufficient. We have a guy over here with the new Apexi RevSpeed meter and g sensor - will attempt to measure before and after BFI on road performance.
#137
Lexus Champion
Cool.. post results once you get them!
#138
Lexus Test Driver
Thread Starter
Join Date: Jul 2001
Location: California
Posts: 936
Likes: 0
Received 0 Likes
on
0 Posts
weird day at the dyno..
I had my ECU re-tuned completely today. While having a lot of peak power is nice, the low end lacked. Chances are we're going to dyno again in a couple months when we find a way around the MAF issue.
The tuning before was nil till the car hit 5000 RPM. Also, the car was tuned on an older load-dyno, which isn't as precise as the DynoJet used at DSR. The effects were still the same, and the gains were awesome, but I stick to the "why stop there" kind of attitude. Now, the ECU upgrade itself does a 21-22 hp gain which is consistent over almost the whole power band. Some of the peak is lost, but the peak was at such a high RPM (look at the old graph) it more than makes up for it, and it's noticeably better than before on the street. I suppose that if we had close-ratio 6-speeds in our cars the original map would have been better for autocross and stuff like that.
I have to give props to Richard at DSR for explaining dyno technology to me. And props to that idiot in the Boxster S that I outran on the freeway today at 130 MPH, he risked his life to prove that his car was slower than mine
"If it's not done on a dynojet, it's not reliable."
One note- since the car is actually using less fuel (as much as 15%) I'm making almost 30 MPG.
The tuning before was nil till the car hit 5000 RPM. Also, the car was tuned on an older load-dyno, which isn't as precise as the DynoJet used at DSR. The effects were still the same, and the gains were awesome, but I stick to the "why stop there" kind of attitude. Now, the ECU upgrade itself does a 21-22 hp gain which is consistent over almost the whole power band. Some of the peak is lost, but the peak was at such a high RPM (look at the old graph) it more than makes up for it, and it's noticeably better than before on the street. I suppose that if we had close-ratio 6-speeds in our cars the original map would have been better for autocross and stuff like that.
I have to give props to Richard at DSR for explaining dyno technology to me. And props to that idiot in the Boxster S that I outran on the freeway today at 130 MPH, he risked his life to prove that his car was slower than mine
"If it's not done on a dynojet, it's not reliable."
One note- since the car is actually using less fuel (as much as 15%) I'm making almost 30 MPG.
#139
Pole Position
Join Date: May 2001
Location: International
Posts: 316
Likes: 0
Received 0 Likes
on
0 Posts
1993 V8 beat all 1991 V8's at Dyno day stock and modified.
Barry gets 31.5 mpg after BFI'ing his 91 V8.
Aaron gets similar with his new extractors.
I also got improvement after BFI ' ing my car - new fuel pump also made a noticeable difference to top end and fuel economy. Old one run out of puff up top - didn't lean out though - ECU too smart for that.
Barry gets 31.5 mpg after BFI'ing his 91 V8.
Aaron gets similar with his new extractors.
I also got improvement after BFI ' ing my car - new fuel pump also made a noticeable difference to top end and fuel economy. Old one run out of puff up top - didn't lean out though - ECU too smart for that.
#140
Pole Position
Join Date: Dec 2001
Location: Sunny Southern New England
Posts: 373
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by UZZ32
Anyone notice car goes better when cold? Car is very lean when warm low down in rev range, when the ECU thinks car is cold it makes mixtures richer for more punch -
Anyone notice car goes better when cold? Car is very lean when warm low down in rev range, when the ECU thinks car is cold it makes mixtures richer for more punch -
ALso of note, in re-reading the Sportscar International 1993 Supra TT road test, they noted that the Supra had near absymal 1/4 mile times when runs were executed back to back. They said the car needed to cool down at least a half hour or more between runs to cool down the intake sensors.
#141
Lexus Test Driver
Originally posted by UZZ32
1993 V8 beat all 1991 V8's at Dyno day stock and modified.
Barry gets 31.5 mpg after BFI'ing his 91 V8.
Aaron gets similar with his new extractors.
1993 V8 beat all 1991 V8's at Dyno day stock and modified.
Barry gets 31.5 mpg after BFI'ing his 91 V8.
Aaron gets similar with his new extractors.
Methinks it's running *plenty* rich.
SR
#142
Lexus Test Driver
Thread Starter
Join Date: Jul 2001
Location: California
Posts: 936
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by Red93sc400
ALso of note, in re-reading the Sportscar International 1993 Supra TT road test, they noted that the Supra had near absymal 1/4 mile times when runs were executed back to back. They said the car needed to cool down at least a half hour or more between runs to cool down the intake sensors.
ALso of note, in re-reading the Sportscar International 1993 Supra TT road test, they noted that the Supra had near absymal 1/4 mile times when runs were executed back to back. They said the car needed to cool down at least a half hour or more between runs to cool down the intake sensors.
I would get better mileage if I wasn't a leadfoot
#143
Chicago Lexus Club Moderator
Originally posted by CmputerWiz
Wow...31.5mpg! On my little I6 I get about 12mpg. :/
Methinks it's running *plenty* rich.
SR
Wow...31.5mpg! On my little I6 I get about 12mpg. :/
Methinks it's running *plenty* rich.
SR
#144
Lexus Test Driver
Originally posted by DIrEctQL
So what do you guys think of HKS Twinpower? It comes with a harness for N/A Supra. My guess would be it's the same harness that would work on our cars. No?
So what do you guys think of HKS Twinpower? It comes with a harness for N/A Supra. My guess would be it's the same harness that would work on our cars. No?
Yep, it should be the same thing. I think Scott (SC300T) or some turbo guy here is getting ready to try one. I remember reading it somewhere. It may have even been earlier in this thread...lol
SR
#145
Chicago Lexus Club Moderator
Originally posted by CmputerWiz
Yep, it should be the same thing. I think Scott (SC300T) or some turbo guy here is getting ready to try one. I remember reading it somewhere. It may have even been earlier in this thread...lol
SR
Yep, it should be the same thing. I think Scott (SC300T) or some turbo guy here is getting ready to try one. I remember reading it somewhere. It may have even been earlier in this thread...lol
SR
Thread
Thread Starter
Forum
Replies
Last Post