Falshed old GIAC ko8 friday and drove around and let it settle over the weekend. and.... - Page 2

siffer · 10-30-2005, 06:29 PM

siffer · 10-30-2005, 06:32 PM

siffer · 10-30-2005, 06:35 PM

PSmalls::DoggieStyle · 10-30-2005, 06:36 PM

With a MBC *only* set over 1 bar, you may experience TC in the upper RPMs without a TCD. Here are some graphs to show what I mean....

Notice how actual and requested boost diverge at ~5,500 RPM.

As you can see above, the biggest boost deviation occurs at ~6,000 to redline. At that point, throttle would cut on my car. Notice how MAF drops (due to throttle plate closing as a result of the boost deviation) at that point in the RPMs....

Again, you only have to worry about this problem if you go with a MBC *only* setup. With that said, I recommend MBC in parallel with the N75 on K03s. With this setup, the MBC only clips the boost spike. When boost is below the MBC's setting, the N75 controls the boost...allowing the boost to taper as the ECU requests and thus not inducing throttle cut.

rktskicar · 10-30-2005, 06:39 PM

L308x feels smmother, because it does not have the torgue peaks and valley's caused by overboost TC. Take a look at these graphs in the links. In my testing, K08x is "slightly" faster than L308x, but not appreciably so (~3.5 HP) overaged over 4200-6500 RPM range...

Bruce

HP comparision for K08x and L308x

ExpStang · 10-30-2005, 06:50 PM

siffer · 10-30-2005, 06:54 PM

EE:OutofBounds · 10-30-2005, 07:58 PM

rktskicar · 10-30-2005, 08:05 PM

This is GIAC 3- config with no MBC. Will report back. Install set for next weekend.....

Bruce

rktskicar · 10-30-2005, 08:08 PM

with L308x. Partial throttle response very good.

Bruce

10-30-2005, 06:29 PM	#11
siffer Junior Member Garage is empty, add now Join Date: Apr 2005 Posts: 605	I do like my Ko3's for now, I luv the jolt too. If I go MBC at 18 will I not be ok?

10-30-2005, 06:32 PM	#12
siffer Junior Member Garage is empty, add now Join Date: Apr 2005 Posts: 605	The latest x is smooth and powerful thru the whole range but no slap in the face for me.

10-30-2005, 06:35 PM	#13
siffer Junior Member Garage is empty, add now Join Date: Apr 2005 Posts: 605	Steve, You ve been driving old for a while right? What would you choose? Old,New?

10-30-2005, 06:36 PM	#14
PSmalls::DoggieStyle Elder Member Garage is empty, add now Join Date: Jan 2004 Posts: 30,257	You'll probably be fine. Also, just some clarification for people here.... With a MBC only set over 1 bar, you may experience TC in the upper RPMs without a TCD. Here are some graphs to show what I mean.... Notice how actual and requested boost diverge at ~5,500 RPM. As you can see above, the biggest boost deviation occurs at ~6,000 to redline. At that point, throttle would cut on my car. Notice how MAF drops (due to throttle plate closing as a result of the boost deviation) at that point in the RPMs.... Again, you only have to worry about this problem if you go with a MBC only setup. With that said, I recommend MBC in parallel with the N75 on K03s. With this setup, the MBC only clips the boost spike. When boost is below the MBC's setting, the N75 controls the boost...allowing the boost to taper as the ECU requests and thus not inducing throttle cut.

10-30-2005, 06:39 PM	#15
rktskicar AudiWorld Super User Garage is empty, add now Join Date: Oct 2002 Location: Seattle area Posts: 10,750	Yes, but have you checked any FATS or whatever to see if K08 is actually any faster? L308x feels smmother, because it does not have the torgue peaks and valley's caused by overboost TC. Take a look at these graphs in the links. In my testing, K08x is "slightly" faster than L308x, but not appreciably so (~3.5 HP) overaged over 4200-6500 RPM range... Bruce HP comparision for K08x and L308x __________________ "once a B5 S4 owner, always a B5 S4 fan" Stock ECU, 010 6MT Sprint Blue B8 S4. Premium +, Sport diff, B&O BBS CH, 255/40/18 Bridgestone RE960 AS, Milltek resonated cat-back + DPs Past: 01.5 6MT ASP Stage 3 S4 (4/01 to 9/09)

10-30-2005, 06:50 PM	#16
ExpStang AudiWorld Senior Member Garage is empty, add now Join Date: Aug 2003 Posts: 840	I only get TC in 6th gear if i got full throttle and dont down shift __________________

10-30-2005, 06:54 PM	#17
siffer Junior Member Garage is empty, add now Join Date: Apr 2005 Posts: 605	Thanks guys, FWIW Im sticking with the old.

10-30-2005, 07:58 PM	#18
EE:OutofBounds Elder Member Garage is empty, add now Join Date: Aug 2001 Posts: 14,297	TC??....time for the Madman 3/4 throttle mod =) __________________ Out of Bounds Rideshop (908) 232-4500 (Nike SB, Supra, Diamond, Krew, Burton, Rome, Grenade, etc) Out of Bounds MySpace

10-30-2005, 08:05 PM	#19
rktskicar AudiWorld Super User Garage is empty, add now Join Date: Oct 2002 Location: Seattle area Posts: 10,750	They are both good in their own ways. I think that I will try the next version (K0411x).. This is GIAC 3- config with no MBC. Will report back. Install set for next weekend..... Bruce __________________ "once a B5 S4 owner, always a B5 S4 fan" Stock ECU, 010 6MT Sprint Blue B8 S4. Premium +, Sport diff, B&O BBS CH, 255/40/18 Bridgestone RE960 AS, Milltek resonated cat-back + DPs Past: 01.5 6MT ASP Stage 3 S4 (4/01 to 9/09)

10-30-2005, 08:08 PM	#20
rktskicar AudiWorld Super User Garage is empty, add now Join Date: Oct 2002 Location: Seattle area Posts: 10,750	Have a 3/4 mod in my center console. Works pretty good with K08x and APRv5. However, don't need it with L308x. Partial throttle response very good. Bruce __________________ "once a B5 S4 owner, always a B5 S4 fan" Stock ECU, 010 6MT Sprint Blue B8 S4. Premium +, Sport diff, B&O BBS CH, 255/40/18 Bridgestone RE960 AS, Milltek resonated cat-back + DPs Past: 01.5 6MT ASP Stage 3 S4 (4/01 to 9/09)

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