Dinan Stage 3 Software & High Flow Throttle Body

[RSicks]

I'm glad you like it, but quick question...

Where did you get these HP numbers at? Dinan shows only 8hp increase with Stage 1, stage 3 is so that the tune can correctly use the amount of air, and 8hp more for the throttle body (all from their website). 28hp for the throttle body and tune is really over exaggerated. Maybe in a Honda where their "from factory" parts are not performance based whatsoever.

I'll let someone chime in with real numbers, but I am thinking closer to 10-15hp real world. But the weight loss from both the resonator removal and exhaust and the corrected power curve may be the bigger factor.

Again, I am glad you like the finished product!

[BMW-x5-48is]

Originally Posted by RSicks

I'm glad you like it, but quick question...

Where did you get these HP numbers at? Dinan shows only 8hp increase with Stage 1, stage 3 is so that the tune can correctly use the amount of air, and 8hp more for the throttle body (all from their website). 28hp for the throttle body and tune is really over exaggerated. Maybe in a Honda where their "from factory" parts are not performance based whatsoever.

I'll let someone chime in with real numbers, but I am thinking closer to 10-15hp real world. But the weight loss from both the resonator removal and exhaust and the corrected power curve may be the bigger factor.

Again, I am glad you like the finished product!

Well there's more then just the dinan stuff.. I also have the AFE cold air intake (stage 2) where it claims additional 10-HP. {This Stage 2 cold air intake system produces 10 max horsepower, 20lbs. x ft. torque and out-flowed the factory intake by 87%}

so you have the AFE cold air intake - lets just say 8HP instead of 10HP, then you got the resinator removed and SUPERSPRINT freeflow exhaust added with additional claims of 10-15 HP. So the AFE intake and the exahust alone should add 15 HP by itself. Then I have the DINAN High flow throttle body added with claims of 8-10 HP more, lets stay at 8HP, so the HIGH FLOW body adds another 8HP to the 15 HP - so were at what 20HP - with the DINAN stage 3 software which takes advantage of the air flow and all - even if it adds an extra 15 HP - all together were 35HP+ - add that to 355 stock - were close to 400 HP mark..

Once i do the 4WD DYNO we will know for suree :-)

[JCL]

I don't think you can consider all those claimed increases to be cumulative. You would need each of them to get the benefit from the others. A dyno would show it for sure. Also, the hp increases you are noting are at the hp peak, up near redline. Is that the engine speed you are using for taking off from a standing stop?

Interesting observation on the increased engine braking. Engine braking is a function of restriction in the induction system. Did you change the transmission software so that it shifts differently? If not, then your observation of increased power due to reduced intake restriction is at odds with what you are noting on perceived engine braking.

[DSSA]

Unfortunately, I think you'll be in for some disappointment when you strap it down unless BMW has really bad mapping on those cars from the factory.

You cannot simply "add" up manufacturer's claims to come up with a peak power increase.

On top of manufacturers using numbers that are always enthusiastically high, gains from one modification to the other are rarely at the same point under the curve. One may gain the most increase at 3200 rpm, while another may add a small amount at 5800.

The end point is that you are happy with the changes and the way that the car drives, regardless of real number imrovements or perceptive differences. Dyno numbers at this point won't give you any real data to gauge gains.

[Joshdub]

You can't compare the BMW released figures to any dyno results you get. You really need to dyno it stock and then modified on the same dyno to make any claims.