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Dave
Dodge Dakota
10/24/2001
13:44:06
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 Subject: Dyno Results-Bernd,Look at this!
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Message:
Guys,
Just got back from the Chassis Dyno and the numbers are very enlightening!
I have a 1997 Dakota CC with the 5.2L and 5 speed.I have added Headers,Hi Flo cat,Cat-back exhaust w/Flowmaster. Kat box,1.7 roller rockers,MSD ignition and wires and blaster coil,Intense Performamce stage III cold air,Holley TB(53mm),IAT adjuster from Speedtweaks.
The ambient air temp was 85 and the humidity was about 73% and the Barometric press. was 29.99.Elevation is about 2 feet ASL all these numbers were corrected for above atmospheric conditions, and all readings are AT THE REAR WHEELS in 4th gear.
Out of 5 pulls,the best was 216 hp and 285.6 ftlbs. torque. A/F ratio at peak power was 13.1.
Incoming air temp, measured at the air hat was approx. 88 degrees at speed, which is pretty darn good considering I was just sitting still.The Intense Performance Stage III is a terrific cold air system! The IAT was set at the 9 o'clock position for the best run.The WORST run was when the IAT was set at the fully cold position or about the 7 o'clock position.The motor did not like this setting AT ALL! I lost about 10 HP and almost 30 ftlbs torque! Putting it back at 9 o'clock brought back all the power.With the IAT at the 12 o'clock position, I was down about 5-7 ftlbs torque and 3-4 HP. over the 9'clock position.
Overall, it would seem that this little $30-$40 mod (the IAT) that takes about 10 minutes to install, is well worth the money!
Considering that you lose about 20% between the flywheel and the back tires, my engine is making about 270 HP and 356 ftlbs torque at the flywheel, and torque is what gets this 4,500 pound beast down the road (or dragstrip)!
One concern the dyno guy had was my exhaust,He seems to think I need a true dual exhaust with crossover pipe,without the single pipe between the cat and the muffler.He promises approx. 15 hp gain! This seems to make sense seeing how I have the big TB and the 1.7 rockers.
I would appreciate any comments or suggestions from anyone that can help.
Dave.
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bernd
*GenIII*
10/24/2001
14:00:09
| RE: Dyno Results-Bernd,Look at this!
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Message:
Those are some pretty good numbers...but you've got the IAT clock positions backwards:
7-O'Clock is 190 degrees
9-O'Clock is about 110-115
The IAT Adjuster works from 7-O'Clock (190F) to 4-O'Clock (16F).
1997 Dodge Dakota SLT - V6
Supercharged @ 10# w/Nitrous
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Dave
Dodge Dakota
10/24/2001
14:08:31
| RE: Dyno Results-Bernd,Look at this!
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Message:
Now I'm confused! I have my box mounted with the on/off switch to the right of the dial, with the hash marks on the dial running clockwise from the 7 o'clock to the 5 o'clock position, approx. 9 o'clock would be 270 degrees on a compass and 7 o'clock would be about 200 degrees +/-. Do I have my control upside down?
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Dave
Dodge Dakota
10/24/2001
14:14:03
| RE: Dyno Results-Bernd,Look at this!
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Message:
I forgot to add a modification I have: I put the Form Motorsports 19# injectors on.This is a very simple job, and at $25 a piece from Summit, a very sensible thing to do. Besides, it's recommended at 50K miles anyway!
Dave
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Dave
Dodge Dakota
10/24/2001
15:30:35
| RE: Dyno Results-Bernd,Look at this!
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Message:
Bernd,
You're right! I had my settings BACKWARDS! (Must be "dain brammage" from all those drugs in high school) Colder IS to the right! DOH! No wonder the engine didn't like it all the way to the left! Boy am I an idiot! When I get the exhaust configured right and I go back to the dyno for some more pulls, I'll make sure I get some "switch on" and "switch off" info.
Dave the Doofus!
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Aaro
Dodge Dakota
10/28/2001
01:50:13
| RE: Dyno Results-Bernd,Look at this!
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Message:
Dave your mods don't list a computer mod do you have one? or is this with stock timing curve?
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Dave
Dodge Dakota
10/28/2001
19:09:57
| RE: Dyno Results-Bernd,Look at this!
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Message:
Aaro,
No,I do not have any computer mods.With the exception of the IAT adjuster,Kat Box,and MSD ignition,everything electronic is stock.I have been thinking about a MoPar performance PCM, but it seems that there has been some debate about how much good they actually do.Any definitive answers or informed opinions would be gratefully welcomed!
I am very seriously considering nitrous to be my next modification (after the true dual exhaust).
Dave
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Wayne
Dodge Dakota
10/28/2001
19:18:17
| RE: Dyno Results-Bernd,Look at this!
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Message:
So Dave, exactly how much temp are you taking away/adding to the AIT reading using the 9 o'clock position? Is your AIT in stock location or moved? What position on the dial would be zero, or no change from stock reading?
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Aaro
Dodge Dakota
10/28/2001
22:23:20
| RE: Dyno Results-Bernd,Look at this!
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Message:
Dave,I have a jet chip that slowed my truck down so I took it out the IAT is my only computer mod.I have simaler mods with a tighter exhaust ,The mopar computer is not offered for my year and trans so I will be getting a custom flash.It is simple the flash will add timing advance and that will make more power,if you make the engine breath better you need more advance at the start of the curve and if you run a 180 stat you can add more at high rpms without detonation.With a custom flash you can add 2-3 degrees of advance on top of what the mopar pcm would.I have alot of experience with recurving distributors and I would guess that 6 degrees of advance should yield a 10% gain in power about 30hp in our case.My stock pcm only runs about 26 degrees full advance and 32-33 would be ideal.
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bernd
*GenIII*
10/28/2001
22:36:49
| RE: Dyno Results-Bernd,Look at this!
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Message:
Aaro: The factory "Full Advance" is 40 degrees. At what RPM and at whan load% are you referring the 26 degrees to?
1997 Dodge Dakota SLT - V6
Supercharged @ 10# w/Nitrous
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Aaro
Dodge Dakota
10/28/2001
22:53:19
| RE: Dyno Results-Bernd,Look at this!
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Message:
no load 4000 rpm with a good timimg light
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bernd
*GenIII*
10/29/2001
08:59:19
| RE: Dyno Results-Bernd,Look at this!
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Message:
That's really odd...i've checked many Dakota's from 1995 - 2000 and they're all right at about 40 degrees total timing at 3000rpm under light load (cruising).
1997 Dodge Dakota SLT - V6
Supercharged @ 10# w/Nitrous
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jjj
Dodge Dakota
10/29/2001
10:32:42
|  RE: Dyno Results-Bernd,Look at this!
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Message:
Bernd,
my 01 5.9 QC only has 35 deg. at 3000 no load. Well had now it is bumped up to 41 deg : )
On the trans box how much can it adjust the speedo readings?
Thanks,
Jeff
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bernd
*GenIII*
10/29/2001
11:52:14
| RE: Dyno Results-Bernd,Look at this!
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Message:
JJJ: How did you "bump" it up?
1997 Dodge Dakota SLT - V6
Supercharged @ 10# w/Nitrous
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Aaro
Dodge Dakota
10/29/2001
17:48:30
| RE: Dyno Results-Bernd,Look at this!
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Message:
When I pulled that 26 degree # it was runing a jet chip and it was hot (95),had the light out for an older truck and put it on just to look.Today its cool (60) put the light on with the IAT off it was about 35 and with the IAT adjuster set at 1:00 timing was at 37 degrees @ 3000 rpm no load.Put the jet chip back on at it went down to 30,I don't know if I should use it for a paper weight or door stop. Bernd does the computer back off the timing when under load?
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bernd
*GenIII*
10/29/2001
19:25:09
| RE: Dyno Results-Bernd,Look at this!
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Message:
Yes, the computer (or any old conventional distributor) will pull out the timing under load. That's how they work. (You don't want full timing in under load unless you're at a much higher rpm.)
1997 Dodge Dakota SLT - V6
Supercharged @ 10# w/Nitrous
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Jim
Dodge Dakota
10/29/2001
23:18:18
|  RE: Dyno Results-Bernd,Look at this!
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Message:
So you should or should not run a jet chip and the IAT together. Please let me know I am running both. Thanks
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jjj
Dodge Dakota
10/29/2001
23:21:17
| RE: Dyno Results-Bernd,Look at this!
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Message:
Bernd,
Are you ready? Crank sensor relocation - cheap and dirty, but adjustable. Just have to have the guts to take a die grinder to the trans case on a new $29,000 truck : 0 Average about 200 miles per half tank now 80%highway 20%city driving and power is up. Had it at 10 deg. but tooo much for 87 or even 89 octane. You don't really notice the extra power after awhile until you put the timing back to stock. Then you think wow did someone throw a little 4.7 in here. Flame on : )
Jeff
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js
Dodge Dakota
10/30/2001
09:29:01
| RE: Dyno Results-Bernd,Look at this!
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Message:
Bernd if you respond can you let me know on the question on IAT and jet chip. Thanks
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bernd
*GenIII*
10/30/2001
13:31:02
| RE: Dyno Results-Bernd,Look at this!
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Message:
jjj: Yup...seen people do that and thought about it myself many moons ago. I'm taking a different route as most people don't know how to check the timing on the computer controlled vehicles. (ASE will be receiving my '97 PCM for timing and fuel recalibration...and no speed limiter.)
js: No, the IAT Adjuster does not work well with the Jet as they (Jet) use their $200+ method to alter the IAT signal.
1997 Dodge Dakota SLT - V6
Supercharged @ 10# w/Nitrous
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alex
Dodge Dakota
10/30/2001
14:34:14
| RE: Dyno Results-Bernd,Look at this!
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Bernd!
What will ASE charge all us normal folks for a flash? Have you got a contact ##? WIll they do 4.7 PCMs?
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JS
Dodge Dakota
10/30/2001
20:53:57
| RE: Dyno Results-Bernd,Look at this!
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Message:
Bernd I read on the instruction that if you turn your IAT on or off while the engine is ruuning it will trip a code. I have done this 3 or 4 times and it has never triped a code is this normal. I also never received my stickers for my IAT. Thanks
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smittyt2
Dodge Dakota
10/30/2001
23:55:07
| RE: Dyno Results-Bernd,Look at this!
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Message:
Hey Bernd;
I have the Jet stage II and the 70mm TB along with the IAT. Other mods include dynomax superturbo single in dual out, 3923's, and po boy intake. All of this is on my Quad cab 4.7. My best 0-60 time with all mods is 7.07 off the g-tech reading. I still have wheel spin on take off as well. Whenever I can learn to control the wheel spin I should be in the high 6's. This is also an automatic with 3.55 gears. I will test later without the Jet chip but for now it seems to be working very well. I am starting to get the rich smell though.(rotten eggs)This is only immediately after WOT. Not bad times for a 4500 pound truck. Whenever I find a stretch without cops here in Dallas I will test the 1/4.
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bernd
*GenIII*
10/31/2001
00:14:08
| RE: Dyno Results-Bernd,Look at this!
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Message:
JS: The reason for the "Do not turn ON/OFF while the engine is running" is that on some trucks, the MIL was tripped. While I haven't seen this on all trucks, the liability factor comes into play. If one or two trucks don't exhibit the problem...while a few other do...we tell you not to flip the switch.
If it works in your case...use it as you like. This doesn't mean that it'll work on others though.
Smitty: That's the reason why it doesn't work properly with the Jet-II. The Jet already modifies the IAT signal to a colder reading...the IAT adjuster will be off (colder) on the dial.
1997 Dodge Dakota SLT - V6
Supercharged @ 10# w/Nitrous
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JS
Dodge Dakota
10/31/2001
09:47:24
| RE: Dyno Results-Bernd,Look at this!
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Message:
Thanks Bernd for your help
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jjj
Dodge Dakota
10/31/2001
15:03:38
| RE: Dyno Results-Bernd,Look at this!
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Message:
bernd,
Yes, the only drawback to moving the sensor is the fuel curve is still the same. But still passed I/M tests with flying colors. When I get a consistent 20 mpg highway with the 5.9 4x4 QC without a power loss - then I'll be happy. Who am I kidding, then I'll want 25 :) Have you ever tried that linkite additive (sp) supposed to guarentee 10% increase if fuel economy?
Jeff
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