MTBSully

Forgot to ask are you running a speed density setup? If so, what was involved in the conversion?

jayyyw

No, still running the MAF. I would think all you need is a breakout harness for the IAT sensor and then tune accordingly.

Shortpersonbk

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.

schpenxel

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)

MTBSully

Speed density removes the o2 sensors from the equation, no? What are the benefits here?

schpenxel

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

MTBSully

Ya I understand how the open/closed upstream o2 system works. Wasnt too sure on the speed density topics. Thanks!

Unreal

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.

Pb82 Ronin

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.

jayyyw

I "unknowingly" mounted the turbo a little too low and to get just a 90 degree bend towards the intercooler would have had the pipe hanging too low. I could have modified the compressor housing and had a 90 degree elbow welded on it, but I was thinking long term, if I wanted to sell the turbo to upgrade that modification may have made it harder to sell. Doesn't seem to hinder the performance though. For a 96mm turbine and a 1.10a/r on a manual car, seems to be all in pretty quickly.

MTBSully

What are you running for plugs at 18lbs? Need to pick up a set and between tr6 and br7es

Unreal

No way in hell anyone should be running a 6 range plug at that power level.

Pb82 Ronin

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.

jayyyw

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.

jayyyw

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.

jayyyw

Ordered a set of 325/50/15 MT Street Rs. Time to turn it up!

Creamo3

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!!

jayyyw

Will do. I wasn't 100% happy with the Pro's. I felt the still spun much more than they should have. Once I got some heat into them, they hooked.

jayyyw

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

Shortpersonbk

30psi 30psi 30psi