Single turbo build
#163
I am speed density can confirm all you need to do is find the 2 iat wires from the maf and send it to a iat sensor and tune for it.
I even ended up hacking off my maf harness yesterday was ugly just laying around.
#164
Race Director
Member Since: May 2004
Location: Raleigh, NC
Posts: 16,664
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St. Jude Donor '15
You can keep the MAF and run speed density just fine assuming the location is getting a realistic temperature reading
(obviously it looks better with the MAF removed, just saying that isn’t necessarily a requirement to run SD)
(obviously it looks better with the MAF removed, just saying that isn’t necessarily a requirement to run SD)
Last edited by schpenxel; 06-11-2019 at 03:11 PM.
#166
Race Director
Member Since: May 2004
Location: Raleigh, NC
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St. Jude Donor '15
Its just a different way for it to calculate how much air is going into the engine
Open loop doesn’t use the o2 sensors, but that is completely separate topic and you can set whatever combo of maf/sd/blended and open/closed loop that is desired
Last edited by schpenxel; 06-11-2019 at 03:35 PM.
#167
Melting Slicks
No. Speed density has nothing to do with the o2 sensors
Its just a different way for it to calculate how much air is going into the engine
Open loop doesn’t use the o2 sensors, but that is completely separate topic and you can set whatever combo of maf/sd/blended and open/closed loop that is desired
Its just a different way for it to calculate how much air is going into the engine
Open loop doesn’t use the o2 sensors, but that is completely separate topic and you can set whatever combo of maf/sd/blended and open/closed loop that is desired
#168
Team Owner
SD uses MAP sensor and IAT sensor to determine a value, then looks it up on the VE table to know how much air is in the motor, then calculate fuel need. So it is a lookup based system, where MAF is directly measuring the airflow with a sensor.
#169
Le Mans Master
Nice man. Good numbers. Question though...is there a reason why the turbo is clocked so the compressor side discharge isn't facing the intercooler? Looks like the pipe has to bend 180 degrees before it enters the IC. Seems like it would've been a much shorter pipe taking up less real estate. Just curious really.
#170
Le Mans Master
Thread Starter
Nice man. Good numbers. Question though...is there a reason why the turbo is clocked so the compressor side discharge isn't facing the intercooler? Looks like the pipe has to bend 180 degrees before it enters the IC. Seems like it would've been a much shorter pipe taking up less real estate. Just curious really.
#172
Team Owner
No way in hell anyone should be running a 6 range plug at that power level.
#173
Le Mans Master
AR-103's from Autolite. I've run them at 26 psi (twin turbos) with a 275 shot on top all on pump gas...they'll do it all day long.
#174
Le Mans Master
Thread Starter
I'm running B9EFS because I anticipate making right around 1200whp. There is some interference with the radio you can hear from the speakers and my remote clicker for the gate will not work if the car is on, lol.
#175
Le Mans Master
Thread Starter
Been driving the car and having tons of fun with it. Coolant temps still higher than I would like but they plateau around 217 degrees. Need to modify the crash beam and then re-evaluate.
Time to order new tires. Currently running 275/60/15 Street Radial Pro. Looking at the 325/50/15 Street R. The 325 is .2" shorter but 1lb heavier. It should accelerate a little faster. Kind of torn.
Time to order new tires. Currently running 275/60/15 Street Radial Pro. Looking at the 325/50/15 Street R. The 325 is .2" shorter but 1lb heavier. It should accelerate a little faster. Kind of torn.
#177
Racer
Reply back once you've had a chance to try them out. I have a set of 275/60/15 Radial Pro's that I'm going to be testing on the street once my build is done. I've heard the Street R's hook better on the street and the Pro's do better at the track for whatever that's worth, even though they're the same compound. The 325/50's will definitely fill out the wheel well!!
#178
Le Mans Master
Thread Starter
Reply back once you've had a chance to try them out. I have a set of 275/60/15 Radial Pro's that I'm going to be testing on the street once my build is done. I've heard the Street R's hook better on the street and the Pro's do better at the track for whatever that's worth, even though they're the same compound. The 325/50's will definitely fill out the wheel well!!
#179
Le Mans Master
Thread Starter
Very happy with the 325/50s right now. They fill the wheel wells much better and offer superior grip from a roll. I have no rubbing issues with these tires. Very happy with the purchase.
I've been playing around with calculators, bench racing while I'm bored at work.
8000rpm rev limit MPH
1st Gear
2.66 - 72.73 MPH
2nd Gear
1.78 - 108.69 MPH
3rd Gear
1.30 - 148.82 MPH
4th Gear
1.00 - 193.46 MPH
Trap speed at current HP/weight
Your Horsepower computed from your vehicle weight of 3100 pounds and MPH of 155 is 889.51
Trap speed with old nitrous setup was pretty spot on HP/weight wise
Vehicle weight
3100
Dyno horsepower
830
¼-mile ET
9.03 seconds
¼-mile ET
150.88 MPH
Potential trap speed, turned up all the way
Vehicle weight
3100
Dyno horsepower
1200
¼-mile ET
7.99 seconds
¼-mile ET
170.59 MPH
I've been playing around with calculators, bench racing while I'm bored at work.
8000rpm rev limit MPH
1st Gear
2.66 - 72.73 MPH
2nd Gear
1.78 - 108.69 MPH
3rd Gear
1.30 - 148.82 MPH
4th Gear
1.00 - 193.46 MPH
Trap speed at current HP/weight
Your Horsepower computed from your vehicle weight of 3100 pounds and MPH of 155 is 889.51
Trap speed with old nitrous setup was pretty spot on HP/weight wise
Vehicle weight
3100
Dyno horsepower
830
¼-mile ET
9.03 seconds
¼-mile ET
150.88 MPH
Potential trap speed, turned up all the way
Vehicle weight
3100
Dyno horsepower
1200
¼-mile ET
7.99 seconds
¼-mile ET
170.59 MPH
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