HEMIDON got DYNO'd

[HEMIDON]

First I want to Thank James and Dave at ProMotion for all the time we spent trying to find the right jetting for my Nitrous.

The air was ok.. 87* 29.85 BARO, 32% HUMIDITY

First we did 2 pulls just motor... We got 326 HP / 365 TQ A/F @13.40

Then we tried the spray.
First pull.. 405.06 HP / 491.44TQ.. A/F 11.62 RATHER FAT...
Best Torque.. 400.76 HP / 520.16TQ.. A/F 12.28 Still kinda fat

We then tried changing jets, watching the A/F and timing. Without the spray we were running 34* max timing with a IAT at around 45C. With jets 30/52 combination the timing maxed at 32 but the IAT went to 9C. So we figured go leaner on the fuel. So we went to a 26/52 combination. Everything stayed about the same with the A/F and timing but we lost like 10HP. So we went back to the 30 fuel and stepped up the nitrous to 56 to see if we could get leaner on the A/F. With the nitrous stepped up the IAT went to -3C and the timing maxed at 29*. We actualy lost 5HP but pulled 520TQ. We played with different jets combinations but never got over the 405 mark.

We were afraid to pull the IAT for fear of breaking it and not having a replacement. We may have seen different results if the IAT was up stream of the spray.

A few of conclusions... HAL will pull timing when the IAT is cold. The colder the IAT sensor gets the more HAL will fatten up the fuel and pull timing. With the spray down stream of the IAT the more nitrous we sprayed HAL would compensate and fatten up the fuel. More nitrous produces more torque with a loss of HP. On just motor the max numbers TQ at 4400, HP max at 5200. On nitrous the max TQ numbers were at about 3800 and falling off pretty quick after 4500 when HAL stopped advancing the timing. Peak HP numbers stayed pretty flat from 4500 to 5500. Even at 6000 it was still pulling 375HP.

My next mod is to change the location of the IAT to just after the air cleaner box down, stream of the nitrous. Once I move the IAT we need to get this thing back on the DYNO to see how HAL acts

[Cam]

Where are you spraying at???. BTW, damn those are some great numbers.

[bklynmag]

Nice numbers Don!

[HEMIDON]

Nice numbers Don!

Thanks,

I was real suprised and very happy to see 400+HP. Based on my 1/4 mile runs I figured I was in the 360-370 range. I'm going to move my IAT to just after the air box and see what my 1/4 mile times do. Something that realy suprised me, when we jetted it up to a 150 shot it made the same HP/TQ because HAL pulled timing and added fuel

Juan, We know our cars run just about a dead heat. Have you had your Mag Dyno'd ? .

[HEMIDON]

Where are you spraying at???.

My IAT is in the stock location. I'm spraying just after the flex jount in the intake hose. I think I'm moving the sensor to the flat spot just before the flex

[ProMotionTuning]

Don... Great numbers and it was an awesome car... Please move the IAT soon! hehe

James

[Carfinish]

WOW...awesome numbers Don

[mhigham]

You could try just removing the IAT and placing it in open air just to test the theory (remember to plug the hole, or at least tape over it if short term).

I am also spraying in about the same spot as you with stock IAT. Looking for IAT extension harness.

Mike

[bklynmag]

Thanks,

I was real suprised and very happy to see 400+HP. Based on my 1/4 mile runs I figured I was in the 360-370 range. I'm going to move my IAT to just after the air box and see what my 1/4 mile times do. Something that realy suprised me, when we jetted it up to a 150 shot it made the same HP/TQ because HAL pulled timing and added fuel

Juan, We know our cars run just about a dead heat. Have you had your Mag Dyno'd ? .

The car has never been on a dyno. I just dropped in the 75HP fuel/nitrous jet combo and have never tried using the higher HP combos. I periodically pull plugs to check she is not running lean but no tinkering beyond that.
It takes some serious cojones to drop the 150 shot on the 5.7. I would love to see that run down the 1/4!

[Jweezy]

HEMIDON, are those your corrected numbers?

-Justin

[Hemi_charger]

My IAT is in the stock location. I'm spraying just after the flex jount in the intake hose. I think I'm moving the sensor to the flat spot just before the flex

Bro have you thought about moving that fogger? your spraying right into the 90 elbow. I bet you gettign some bad puddling. might want to move it to spray straight into the throttle body. Im talking from experiance I did this on my camaro when I pulled the boot after a pass the was fuel just sitting there your gonna want to check

[Hemi31]

Thanks,

I was real suprised and very happy to see 400+HP.

I am more surprised at the 326/365 motor only pull.Thats as much as some cammed cars.

Don,didn't you dyno at Englishtown?I don't remember.