Twin Turbo LSX Datsun 280Z
12-05-2015, 08:50 AM
#1221
Any turbo e85 combo in have been around is .8-.9 bsfc
When run from 11.0-11.5
It's kind of irrelevant anyway. You would need to get a trap to even get an idea what it is truly making for power
The holley fuel consumption numbers are perty much bogus anyway. They assume a perfect 1:1 rise in fuel pressure that is held perfectly. It isn't calculating that off of the actual fuel pressure.
It is also assuming the injector flow is perfectly linear from 0% to 100%
It gives you a good idea if everything is right but if you aren't holding fuel pressure it will be inflated big time
When run from 11.0-11.5
It's kind of irrelevant anyway. You would need to get a trap to even get an idea what it is truly making for power
The holley fuel consumption numbers are perty much bogus anyway. They assume a perfect 1:1 rise in fuel pressure that is held perfectly. It isn't calculating that off of the actual fuel pressure.
It is also assuming the injector flow is perfectly linear from 0% to 100%
It gives you a good idea if everything is right but if you aren't holding fuel pressure it will be inflated big time
12-05-2015, 09:20 AM
#1222
I see you start at "0" have you considered or tried to start at spring pressure? Your track ramp rate looks like my street rate 
Except you actually get traction. I need to make some big time adjustments to my street tune. Problem is that some of the guys i run with are 1200whp 996 cars.. They have all the weight in the rear and it makes it very hard to keep up unless i can bring the boost in early and try to use what they don't have (torque)
Except you actually get traction. I need to make some big time adjustments to my street tune. Problem is that some of the guys i run with are 1200whp 996 cars.. They have all the weight in the rear and it makes it very hard to keep up unless i can bring the boost in early and try to use what they don't have (torque)How fast of ro are you starting from?
From 30mph you will always be at a disadvantage with the awd tip cars. The faster the roll obviosuly the better. 60-80 much better but still disadvantage
I start at zero and arm the system manually from very slow roll so that I have a consistent leave for vbox testing
I have another configuration I use too where it starts at higher "launch" boost
I have the footbrake and trans brake tied I to the AMS.... I can change the input with a flip of a switch
So I can brake boost rolling....and it will have however much dome pressure I want on the gate when the brake is depressed say 8 psi. When I release the footbrake the AMS brings the boost in. Not from zero but from wherever I pick
In this way is what I would use for actually racing. The car leaves right now.
It just isn't as consistent as like I do in the videos. The way in the videos it is like bracket racing. My incrementals are stupid consistent
12-05-2015, 04:15 PM
#1223
What kind are we actually talking about? Awd? Tip or manual?
How fast of ro are you starting from?
From 30mph you will always be at a disadvantage with the awd tip cars. The faster the roll obviosuly the better. 60-80 much better but still disadvantage
I start at zero and arm the system manually from very slow roll so that I have a consistent leave for vbox testing
I have another configuration I use too where it starts at higher "launch" boost
I have the footbrake and trans brake tied I to the AMS.... I can change the input with a flip of a switch
So I can brake boost rolling....and it will have however much dome pressure I want on the gate when the brake is depressed say 8 psi. When I release the footbrake the AMS brings the boost in. Not from zero but from wherever I pick
In this way is what I would use for actually racing. The car leaves right now.
It just isn't as consistent as like I do in the videos. The way in the videos it is like bracket racing. My incrementals are stupid consistent
How fast of ro are you starting from?
From 30mph you will always be at a disadvantage with the awd tip cars. The faster the roll obviosuly the better. 60-80 much better but still disadvantage
I start at zero and arm the system manually from very slow roll so that I have a consistent leave for vbox testing
I have another configuration I use too where it starts at higher "launch" boost
I have the footbrake and trans brake tied I to the AMS.... I can change the input with a flip of a switch
So I can brake boost rolling....and it will have however much dome pressure I want on the gate when the brake is depressed say 8 psi. When I release the footbrake the AMS brings the boost in. Not from zero but from wherever I pick
In this way is what I would use for actually racing. The car leaves right now.
It just isn't as consistent as like I do in the videos. The way in the videos it is like bracket racing. My incrementals are stupid consistent
12-06-2015, 09:09 AM
#1224
I start from 8lbs and work my up from there. My ramp rate needs to be faster. The 2.50 is to slow on the track with these 275/50/15. Most of the cars are RWD 6spd. They like the high MPH runs though. They won't run me any slower than 55. A little more seat time and I'll have them beat.
Took the car to the track Saturday morning. For some reason the car wasn't making any more than 15lbs regardless what I threw at the dome.. I can't feel any Hotside leaks and I doubt a cold side would maintain a 15psi level. I figure it would just blow off. Regardless though I had fun.
Leaving off the T brake (3500 rpm and about 4-5lbs) I was able to squeeze out a 1.5 60' and 9.8 @ 143mph. I didn't get to make many passes after that so I couldn't dial it in. I've been battling FPR issues since I got these pumps.. I finally ordered a good regulator and I'm pretty confident that will clear up a lot of these crazy issues. I'm going back to the track next Friday and hoping to shave A LOT of that pass.
Took the car to the track Saturday morning. For some reason the car wasn't making any more than 15lbs regardless what I threw at the dome.. I can't feel any Hotside leaks and I doubt a cold side would maintain a 15psi level. I figure it would just blow off. Regardless though I had fun.
Leaving off the T brake (3500 rpm and about 4-5lbs) I was able to squeeze out a 1.5 60' and 9.8 @ 143mph. I didn't get to make many passes after that so I couldn't dial it in. I've been battling FPR issues since I got these pumps.. I finally ordered a good regulator and I'm pretty confident that will clear up a lot of these crazy issues. I'm going back to the track next Friday and hoping to shave A LOT of that pass.
12-06-2015, 10:57 AM
#1225
Car looks great!
What do you weigh again? What do you use for coils/plug gap?
That seems a little lazy for 15lbs on a twin setup, no?? Are you running meth/water inj? Reason I ask is I was trapping 150 @ 15lbs creeping to 16 at the very end. Turned off my 14gph of 50/50 water meth and picked up almost 3 mph at the same boost level. Since replaced square truck coils with the D585 stuff and dropped the meth inj to 7gph. Picked up quite a bit. 17-18lbs it went 159 at 3100lbs last outing.
What do you weigh again? What do you use for coils/plug gap?
That seems a little lazy for 15lbs on a twin setup, no?? Are you running meth/water inj? Reason I ask is I was trapping 150 @ 15lbs creeping to 16 at the very end. Turned off my 14gph of 50/50 water meth and picked up almost 3 mph at the same boost level. Since replaced square truck coils with the D585 stuff and dropped the meth inj to 7gph. Picked up quite a bit. 17-18lbs it went 159 at 3100lbs last outing.
12-06-2015, 11:47 AM
#1228
Originally Posted by Forcefed86
Car looks great!
What do you weigh again? What do you use for coils/plug gap?
That seems a little lazy for 15lbs on a twin setup, no?? Are you running meth/water inj? Reason I ask is I was trapping 150 @ 15lbs creeping to 16 at the very end. Turned off my 14gph of 50/50 water meth and picked up almost 3 mph at the same boost level. Since replaced square truck coils with the D585 stuff and dropped the meth inj to 7gph. Picked up quite a bit. 17-18lbs it went 159 at 3100lbs last outing.
What do you weigh again? What do you use for coils/plug gap?
That seems a little lazy for 15lbs on a twin setup, no?? Are you running meth/water inj? Reason I ask is I was trapping 150 @ 15lbs creeping to 16 at the very end. Turned off my 14gph of 50/50 water meth and picked up almost 3 mph at the same boost level. Since replaced square truck coils with the D585 stuff and dropped the meth inj to 7gph. Picked up quite a bit. 17-18lbs it went 159 at 3100lbs last outing.
Car sounded a little funky on the rev almost like a slight miss. It wasn't crisp. I have a lot of looking around to do this week and will replace all plugs. I haven't thought about the coils being an issue.
12-07-2015, 01:02 AM
#1236
Any turbo e85 combo in have been around is .8-.9 bsfc
When run from 11.0-11.5
It's kind of irrelevant anyway. You would need to get a trap to even get an idea what it is truly making for power
The holley fuel consumption numbers are perty much bogus anyway. They assume a perfect 1:1 rise in fuel pressure that is held perfectly. It isn't calculating that off of the actual fuel pressure.
It is also assuming the injector flow is perfectly linear from 0% to 100%
It gives you a good idea if everything is right but if you aren't holding fuel pressure it will be inflated big time
When run from 11.0-11.5
It's kind of irrelevant anyway. You would need to get a trap to even get an idea what it is truly making for power
The holley fuel consumption numbers are perty much bogus anyway. They assume a perfect 1:1 rise in fuel pressure that is held perfectly. It isn't calculating that off of the actual fuel pressure.
It is also assuming the injector flow is perfectly linear from 0% to 100%
It gives you a good idea if everything is right but if you aren't holding fuel pressure it will be inflated big time
The only thing I could do to fix the issue was the switch to the donkey dick regulator from aeromotive. Once that was done I was getting an almost perfect 1:1 with boost. Fuel flow numbers at the same power dropped to around 900 lb/hr if I remember right.
12-07-2015, 01:03 AM
#1237
Thanks! Yeah it's lazy for sure. It should be 150. The car weights 3150 with me in it. No meth and truck coils. I am still having FP issues and even on this pass it wouldn't make more than 501psi. I went ahead and ordered a new regulator.
Car sounded a little funky on the rev almost like a slight miss. It wasn't crisp. I have a lot of looking around to do this week and will replace all plugs. I haven't thought about the coils being an issue.
Car sounded a little funky on the rev almost like a slight miss. It wasn't crisp. I have a lot of looking around to do this week and will replace all plugs. I haven't thought about the coils being an issue.
12-07-2015, 06:09 AM
#1238
Originally Posted by Blown06
Man that sux your still having issues. I thought for sure staging the pumps would fix the issue. I guess not. I assume your going to the big aeromotive?
12-07-2015, 08:45 AM
#1240
Originally Posted by ablakez28
Good job on 9s! How did you like the glide? Get that boost issue sorted and you will cruise into the 8s.
Think you have much more left in the 60?
Think you have much more left in the 60?