More boost, Less timing OR Less Boost, More Timing
On The Tree
Joined: Mar 2006
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If the power is equal I would go the less boost more timing route.
1 Less stress on the turbo system.
2 It will reach max boost/power sooner.
3 On hot muggy days with less boost = cooler IAT’s = poetical for more power
for the conditions.
4 Better back pressure to boost ratio.
5 If your are running a speed density tune and you where having to decide
between 14 psi or 17 psi with 14 psi you can run a 2 bar map.
The resolution is much better on a 2 bar map allowing for a much cleaner
tune up and better drivability.
Just my 2 cents
1 Less stress on the turbo system.
2 It will reach max boost/power sooner.
3 On hot muggy days with less boost = cooler IAT’s = poetical for more power
for the conditions.
4 Better back pressure to boost ratio.
5 If your are running a speed density tune and you where having to decide
between 14 psi or 17 psi with 14 psi you can run a 2 bar map.
The resolution is much better on a 2 bar map allowing for a much cleaner
tune up and better drivability.
Just my 2 cents
agreed but i was just referencing the original question.
Trust...no idea....VP says I would be fine on 110 octane but I am overly safe and run c16 or Sunoco Maximal. Somebody like KP prolly knows the hp/boost/timing /limits vs octane on his d1 combos
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Thread Starter
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From: Alliance Nebraska
well i just got back from playing with the timming and here are the results via "HPtuners VCM Scanner" timer....
runs are from 45-140mph
14psi 18* timing- 16.484
14psi 20* timing- 14.703
14psi 22* timing- 14.907
I didn't get any KR but i think ill drop it back to 20* and leave it there... thing is its still slow!
I am blowing through the converter and i think the trans is slipping...
I mean 14.7 seconds to get from 45-140mph! Man im getting dissapointed... but my car is Full weight + system + oil, antifreeze, and tools, spare tire, jack, and alot other stuff crap that doesn't need to be in the car.... so i bet it is about 3900lbs lol...
runs are from 45-140mph
14psi 18* timing- 16.484
14psi 20* timing- 14.703
14psi 22* timing- 14.907
I didn't get any KR but i think ill drop it back to 20* and leave it there... thing is its still slow!
I am blowing through the converter and i think the trans is slipping...
I mean 14.7 seconds to get from 45-140mph! Man im getting dissapointed... but my car is Full weight + system + oil, antifreeze, and tools, spare tire, jack, and alot other stuff crap that doesn't need to be in the car.... so i bet it is about 3900lbs lol...
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From: Alliance Nebraska
just saw in your profile that your car is auto
What gears do you have cause 45mph is a huge deadspot for autos with 2.73's.
Do you have a converter?
If so what kind is it and what is the stall?
These are some key things that can explain why you think your car feels slow
What gears do you have cause 45mph is a huge deadspot for autos with 2.73's.
Do you have a converter?
If so what kind is it and what is the stall?
These are some key things that can explain why you think your car feels slow
Thread Starter
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From: Alliance Nebraska
9" with 3.70 gears, 28" MT tires Your car seems to be running just fine....you were at a dead spot for a second with no boost and low rpm. Also im sure your tranny is hurting a bit. Need some better clutches and a better band to be able to hold the power
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From: Alliance Nebraska
So it doesn't seem slow?
I was turning up my boost the other day meaning to put it to 14psi but accidentally hit 17psi!
Well after that my temp guage started acting up, keeps losing signal! I checked the wires and they seem ok. The guage in the car works fine but on HPtuners it keeps losing signal and the car acts like it has a bad miss and shows some KR! only does it from light throttle, WOT it doesn't happen...
it also throws my afr all crazy when it does it!
Im not sure what happened! I will attach a log to show what its doing...
your converter needs to be changed. you have to get it built for a turbo car. also you need to get taller gears if you are still running the 3.70's you should look into 3.42-2.73 range this may help with the dead spot.
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From: Alliance Nebraska
It should... the converter is a 3600 but its flashing to 5300 lol!
Ok i looked at your log you attached. There is a few things that need to be addressed so let me make a list.
1- Your Coolant temp sensor on the side of the head is giving false readings. Either the wires melted or your sensor is faulty. When you started your pull the temp jumped to -38 which is what it defaults to when there is no signal. Fix that ASAP. This will also cause you to run extremely rich and can explain why your car feels so sluggish when you started the pull.
2. You need to log some more pids. Maf/stft/ltft/o2b1s1/02b2s1 this will help telling what is goin on when you do the pull
3. where is your iat sensor located. your iats were at 130 by the end of the pull...seems like your car would LOVE some meth injection
4. Log some of your tranny pids as it will help to show if your getting alot of converter/tranny slippage. TCC slip %/ Trans imput shaft rpm/output shaft rpm.
Post back another log with these changes
1- Your Coolant temp sensor on the side of the head is giving false readings. Either the wires melted or your sensor is faulty. When you started your pull the temp jumped to -38 which is what it defaults to when there is no signal. Fix that ASAP. This will also cause you to run extremely rich and can explain why your car feels so sluggish when you started the pull.
2. You need to log some more pids. Maf/stft/ltft/o2b1s1/02b2s1 this will help telling what is goin on when you do the pull
3. where is your iat sensor located. your iats were at 130 by the end of the pull...seems like your car would LOVE some meth injection
4. Log some of your tranny pids as it will help to show if your getting alot of converter/tranny slippage. TCC slip %/ Trans imput shaft rpm/output shaft rpm.
Post back another log with these changes
ya the tranny is next on the list... cant decide on th400 or 4l80E
So it doesn't seem slow?
I was turning up my boost the other day meaning to put it to 14psi but accidentally hit 17psi!
Well after that my temp guage started acting up, keeps losing signal! I checked the wires and they seem ok. The guage in the car works fine but on HPtuners it keeps losing signal and the car acts like it has a bad miss and shows some KR! only does it from light throttle, WOT it doesn't happen...
it also throws my afr all crazy when it does it!
Im not sure what happened! I will attach a log to show what its doing...
So it doesn't seem slow?
I was turning up my boost the other day meaning to put it to 14psi but accidentally hit 17psi!
Well after that my temp guage started acting up, keeps losing signal! I checked the wires and they seem ok. The guage in the car works fine but on HPtuners it keeps losing signal and the car acts like it has a bad miss and shows some KR! only does it from light throttle, WOT it doesn't happen...
it also throws my afr all crazy when it does it!
Im not sure what happened! I will attach a log to show what its doing...