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May 30, 2008 | 02:02 PM

#766

mazzuri

Driver

Joined: Oct 2006

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From: CA

I think this thread will be refrenced by all manufactures that will want to make anything exhaust related with the ISX50. A lot of info in here.

May 31, 2008 | 06:03 AM

#767

Gernby

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From: CA

Quote:

Originally Posted by Giggity

Yeah, but it has been my experience that most obdII computers "learn" and no matter what bolt ons you add to increase flow both in and out of the engine to lean out the air/fuel mix, the computer will adjust to keep with the parameters of the rich setting determined by the manufacturer.
I didn't say the headers won't work, dyno sheets have already shown some o.k. gains, I just don't think it's cost effective to throw bolt ons at a motor that as of yet cannot be tuned to optimize performance.

What good does it do to optimize flow out of the engine, if you can't optimize flow and fuel mix going in, this has just been my experience with 2 liters or less of displacement, so I may be a bit off base with with an engine of larger capacity.

OBDII ECU's don't learn at all RPMs or throttle positions. That's why piggy-backs are only used to tune fuel ratios in the upper RPMs with at least ~80% throttle (give or take). FWIW, standard piggy-backs can be used on the ISX50 for AFR tuning via MAF voltage adjustment.

Jun 2, 2008 | 06:11 PM

#768

08mica

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From: Ohio

Can someone post a wiring diagram for the sim card?

Getting headers installed tomorrow and can't find it.

thanks

Jun 3, 2008 | 09:52 AM

#769

mazzuri

Driver

Joined: Oct 2006

Posts: 159

Likes: 0

From: CA

Quote:

Originally Posted by 08mica

Can someone post a wiring diagram for the sim card?

Getting headers installed tomorrow and can't find it.

thanks

Jun 3, 2008 | 03:01 PM

#770

iSuxeL

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From: FL

Man this is such a big warranty void! If the HP/tq gains are significant then I'll buy them.

Jun 3, 2008 | 03:30 PM

#771

08mica

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From: Ohio

Daniel you got PM. Please respond.

Jun 3, 2008 | 03:39 PM

#772

Gernby

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From: CA

Quote:

Originally Posted by iSuxeL

Man this is such a big warranty void! If the HP/tq gains are significant then I'll buy them.

Define "big". The sim would void the warranty on the ECU, and possibly the whole electrical system (stretch). The headers would void the warranty on the exhaust, and possibly the starter (or other components located nearby).

Jun 3, 2008 | 03:54 PM

#773

carlos

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From: Miami, FL

Quote:

Originally Posted by Gernby

and possibly the transmission and rear-edn from the extra power

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Jun 3, 2008 | 05:47 PM

#774

08mica

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From: Ohio

Question: When the Sim is wired into the car, do you splice the sim into the line with the other lines and leave those connected? Or do you cut the line and just run it into the computer, meaning the wires from the sin go into the ecu, and the ones that were there before are just pulled?

Jun 3, 2008 | 05:59 PM

#775

iSuxeL

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From: FL

You splice the wires and connect the sim to the wires, correct me if Im wrong guys.

Jun 3, 2008 | 06:23 PM

#776

erikbaker

Rookie

Joined: Apr 2008

Posts: 78

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From: Florida

Splice the yellow wire into the brown wire. Splice the white wire into the white and black wire. Cut the black and red wires, tape them off. Connect the red to red and black to black.

Jun 3, 2008 | 06:28 PM

#777

08mica

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From: Ohio

do I keep the original wires connected and add the sim to the line? Or do I cut those wires and freplace the lines out of the ecu with the sim wires.

Sorry I'm a noob at this, that's why had a shop do it. Problem is, that after 5 miles I'm in limp mode

Jun 3, 2008 | 08:39 PM

#778

iSuxeL

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From: FL

Theres the pic from page 51 if you looked.

Jun 4, 2008 | 03:51 AM

#779

08mica

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From: Ohio

^^^^^^^^Thanks, this is turning into a book.

Jun 4, 2008 | 10:25 AM

#780

iSuxeL

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From: FL

Well thats what this forum is supposed to be for. For people to help each other out and stop ish talking!