DCX... Loss of power

Rozwell1 · Post by **Rozwell1** » Mon Nov 15, 2010 9:22 am

Well lost over 30 hp after following the updats from r14 to 9r27 only thing that has changer was a DCX update for 9r12.. this is where i lost power .. just did a dyno run showing 30 hp lower then another car same make and model motor....

I have no answer for this, i would hope you would help me here ..
Thanks for your time

Stricnine · Post by **Stricnine** » Mon Nov 15, 2010 11:05 am

Perhaps we should have reloaded the stock tune and see if it made any more power.

I believe you dyno'd 322 hp / 340 torq stock right? Did you get a dyno with the r14 tune loaded?

At what point were you forced to do a DCX file update via the predator?
Did that take place at some point between r14 and r27? Did you go straight from r14 to r27, or were there other tunes loaded between?

Post by **mikel** » Mon Nov 15, 2010 11:15 am

Yeah, cant compare what your car made to what another car made, at all.

Is this a stock 5.7?

Mike_Levy · Post by **Mike_Levy** » Mon Nov 15, 2010 11:17 am

You can't base your power off another vehicle. Each one is slightly different, and the power difference could be huge. My CSRT8 made 390rwhp with just an intake and tune, while my GCSRT8 makes 392whp with heads, cam, intake mani, TB, headers, injectors, etc, etc, etc. Same 6.1L motor, way different results.

Something is wrong with that chart too. The horsepower and torque curves must cross at 5250rpms. Yours don't. Based on that alone, I'd say thats a dyno fuck up.

Post by **mikel** » Mon Nov 15, 2010 11:18 am

looks like they cross at 5250 to me?

Mike_Levy · Post by **Mike_Levy** » Mon Nov 15, 2010 11:22 am

Is that a cross, or just a big smudge?

Rozwell1 · Post by **Rozwell1** » Mon Nov 15, 2010 11:44 am

Stricnine wrote:Perhaps we should have reloaded the stock tune and see if it made any more power.

I believe you dyno'd 322 hp / 340 torq stock right? Did you get a dyno with the r14 tune loaded?

At what point were you forced to do a DCX file update via the predator?
Did that take place at some point between r14 and r27? Did you go straight from r14 to r27, or were there other tunes loaded between?

Great questions let me see ..
1 yes stock was done @ 324 @ 340
2 no dyno done till yesterday with Tuner
3 DCX was @ 9r15 or 17 ?
4 no I have been updating as new Fuel and Air fixes were done ..
i have replaced my tuner back in July this was going on then ...
new tuner in Sept. same problems..

track data .. running r14 1/8 mile 8.05 @ 86mph..feb..air temp 45 no mods stock air box ..
last week with air temp @ 45 8.33 @ 84mph ..mods CAI..
and new plugs

Rozwell1 · Post by **Rozwell1** » Mon Nov 15, 2010 11:45 am

mikel wrote:Yeah, cant compare what your car made to what another car made, at all.

Is this a stock 5.7?

Yes stock 5.7

Rozwell1 · Post by **Rozwell1** » Mon Nov 15, 2010 11:55 am

Thanks for looking at this ....Note 91 tune only @ Dyno....... the lines at end where shut down as Tech powered me down I ran 4 times you see 2 runs here but all the same ... updated Dyno mode and tire size on last 2 runs ..
I norm. run car @ the track never had a problem till after that DCX update ... what is a DCX update and how could this change this ... I will be pulling data today would you like to see this report ...
I have down loaded 9r27 again and loaded it back on car 93 with CAI ...
Again Thanks for all the help !!!!

Post by **mikel** » Mon Nov 15, 2010 12:07 pm

power looks normal for a stock 5.7 to me, check for KR

Rozwell1 · Post by **Rozwell1** » Mon Nov 15, 2010 12:18 pm

mikel wrote:power looks normal for a stock 5.7 to me, check for KR

Ok , will do ..Mike what is a DCX update ?

Rozwell1 · Post by **Rozwell1** » Mon Nov 15, 2010 1:08 pm

here is my first pull Stock i know this is not the same dyno....

I would think car should pull close to stock numbers with this dyno ... using the tuner

Post by **mikel** » Mon Nov 15, 2010 1:33 pm

can not compare 2 different dynos, ever.

Rozwell1 · Post by **Rozwell1** » Mon Nov 15, 2010 2:49 pm

ok data pull..
let me know what you think

Post by **mikel** » Mon Nov 15, 2010 3:39 pm

can you resize these huge graphs so the page is not so screwy?