cobb access port question

[dkswim]

repost stupid me. but hay its been relesed for all those naysayers.

 

[MS3077]

haha you posted the same thing twice

 

[Munnugles]

ok trying to figure out something... i was reading through the map notes... but still curious... i have ms cai, hks bov in vta, and ets tmic... would i be able to use any of the maps if i was to get the ap or would i need to get an actual tune... for me its either getting the ap or doing down pipe/race pipe and a front lip... so its one choice or the other

 

[Mspeed3]

tuning ur existing mods will yield some serious power while also making it more reliable

 

[dkswim]

bov would be a problem, cai might be compatable, and ets might not make much of a diffrence to run stage one+. but i dont think it would be all that safe and no one has validated those parts with it. i dont even know what to recomend for you.

 

[Munnugles]

would a tune be able to make things correct even with vta?

 

[dkswim]

i dont think cobb is intending on doing any tunning for vta a custume tune might be able to correct for that and it would deffanently be able to correct everything else.

 

[sleeper3]

ok trying to figure out something... i was reading through the map notes... but still curious... i have ms cai, hks bov in vta, and ets tmic... would i be able to use any of the maps if i was to get the ap or would i need to get an actual tune... for me its either getting the ap or doing down pipe/race pipe and a front lip... so its one choice or the other

stage 1 is 10 hp dude. you'll see more than that with just the midpipe. I'd get the other stuff.

if you're dead set on getting the AP, just make sure you either go to a dyno and chart your a/f ratios or get a wideband 02 sensor.

 

[Conso]

thats y i ordered xede =P

 

[sleeper3]

I'm not sure how I feel about piggyback systems yet. our ECU is so adaptive, seems like eventually it would rewrite the maps to cancel it out... not sure about that or anything, but I want my ECU to see what exactly is going on... not be fooled by a black box. that being said, the xede gets GOBS of power from what I've read.

 

[2.0t03speed]

wow im reading the map notes now for the cobb maps and for the stage 2+sf they are tapering the boost down to 7psi by 6700? wtf is up with that

 

[AutoXRacer]

i dont think cobb is intending on doing any tunning for vta a custume tune might be able to correct for that and it would deffanently be able to correct everything else.

That would be pretty cool though...man, if I could run my HKS VTA that would be sweeeet!!!!!

I little ricey (ricer), but still sweet... I wonder how much louder it would be... (huh)

I think they would/should tune for that... I think there would be quite a few interested...

wow im reading the map notes now for the cobb maps and for the stage 2+sf they are tapering the boost down to 7psi by 6700? wtf is up with that

Our stock turbos can't handle high RPMs... I'm pretty sure they did it to save our turbos and engines.

 

[sleeper3]

wow im reading the map notes now for the cobb maps and for the stage 2+sf they are tapering the boost down to 7psi by 6700? wtf is up with that

are they doing that on purpose or is it because of the throttle plate closing?

 

[dkswim]

we have a small snail. and the turbo is running out of steam. and boost is a measure of restriction. thats why the boost tapers off so quick.

 

[aaronc7]

Here's how I see it. Leaving the throttle open 100% till redline will probably make SLIGHTLY more power...but either way power sucks beyond 6000-6500ish and you're going to be shifting around 6k anyways. Gobs of power just is not possible up there with our turbo and cam setup. They do start closing the throttle at those rpms, but its to save some wear and tear on parts. If it had produced any real power they would have left it open. (proved by Christian in a couple posts in other forums). They can do whatever they want with the throttle..it's cobb's b****.

If you go new turbo...maybe even exhaust manifold or other mods they haven't tested yet, all bets are off and opening it up may help more significantly.

I was hoping for more power in the upper RPM range too, but if its still just fattening our current one over the entire rev range thats still good to me.

 

[sleeper3]

also, if my motor sees 6700 rpm, it's only by accident.

 

[sleeper3]

Here's how I see it. Leaving the throttle open 100% till redline will probably make SLIGHTLY more power...but either way power sucks beyond 6000-6500ish and you're going to be shifting around 6k anyways. Gobs of power just is not possible up there with our turbo and cam setup. They do start closing the throttle at those rpms, but its to save some wear and tear on parts. If it had produced any real power they would have left it open. (proved by Christian in a couple posts in other forums).

If you go new turbo...maybe even exhaust manifold or other mods they haven't tested yet, all bets are off and opening it up may help more significantly.

fyi, the throttle is never open 100%. I think the most it is ever open is 95ish %

 

[sleeper3]

here is a log I did this morning
I'll post the graph when I get home but in the mean time, I thought I'd share what I pulled off the DH screen
It's interesting to say the least

3rd gear pull @ 18PSI
37% @ 2977RPM
51
67
69
71
73
75
77
78
79
82% @ 3958RPM
77
74
69
67
65
63
66
67
70
72
73
72
65% @5764RPM
11%(let off throttle)

we are now assuming that these measurements are in degrees rather than percent, thus 82/90=91%throttle at 3958rpm. this is with the gas pedal on the floor.

 

[AutoXRacer]

I read the difference between 100% opened throttle plate and 50% was only 3-4HP at those high RPMs...

 

[2.0t03speed]

ok just for a little comparison. the gt25r would hold boost all the way to red line and its just as small as the k04 if not smaller. so saying the turbo is running out of steam and has to taper down to 7 psi by redline is just stupid in my eyes. i would agree with them tapering the boost down to save the motor but as far as the turbo not being able to hold boost is just rediculous