Speed Density & Inspection
Speed Density & Inspection I am thinking about switching to speed density and am wondering if anyone has figured out how to pass inspection with it.
Here in New Jersey they plug into the OBD2 port. basicly if you don't have any codes you pass inspection.
Any input form tuners would be helpful.
Here in New Jersey they plug into the OBD2 port. basicly if you don't have any codes you pass inspection.
Any input form tuners would be helpful.
I'm in NY and we have the same kind of inspection. I have my car tuned via 2 bar SD on my turbo setup and I have a tune that I built specifically to pass inspection. The car has passed 2 years now without any issues. Do you have HPTuners?
I did one for a guy recently where we put in a disconnect on the MAF signal wire - connect it up and drive it easy (out of boost/low boost) for emissions - disconnect it and it is back to the 2 Bar speed density... I used EFILive and the MAF table is tuned for when the MAF is connected.
No I don't have any tuning software. I am kind of afraid to do my own tuning. I have never done it and am afraid I would mess it up. I would hate to hurt my engine. I'm not FI but I know it's still possible to hurt it.
Thanks
Thanks
TECH Fanatic
Joined: Jul 2010
Posts: 1,756
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From: Maryland
I did one for a guy recently where we put in a disconnect on the MAF signal wire - connect it up and drive it easy (out of boost/low boost) for emissions - disconnect it and it is back to the 2 Bar speed density... I used EFILive and the MAF table is tuned for when the MAF is connected.
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One way to do it would be to use a carb hat (like they do for blow-through carb setups) and connect it to a MAF sensor and factory airlid for emissions purposes... then take it off and use an air filter or whatever you planned on the TB... It would require a tune like I described above with both the MAF and speed density built into the tune. Here is the type of carb hat I'm talking about: http://www.ebay.com/itm/like/190728226546?lpid=82
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Like running a Holley Dominator for a carb.
To do that I would have to run an elbow. Running an elbow knocks the hp in the dirt.
TECH Regular
Joined: Jun 2009
Posts: 448
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From: new york
By technicality if inspector looks at it all on the visual it won't pass ! But as far as computer scan goes it will as the nys comp isn't smart enough to fail it yet . As long as no cel. Is on your fine . Unf at the new year cars 03 up won't pass with a tune as the comp is designed to see it on 03 and newer cars . I built ramairtransam car and I'm a nysi I know what it takes to go or no go
Sorry. Should have quoted. Your post wasn't there when I typed that. An elbow in the duct won't "put the power in the dumper". Nobody with several years of dyno testing would say that about a head & cam car.
Again, sorry I didn't click on Quote, to eliminate confusion.
Btw, I did some SD tuning before hpt ever existed. It can be done with MAF codes completely shut off, so the codes don't show up at all. You have to tweak the MAF testing parameters. Takes a hex editor.
Again, sorry I didn't click on Quote, to eliminate confusion.
Btw, I did some SD tuning before hpt ever existed. It can be done with MAF codes completely shut off, so the codes don't show up at all. You have to tweak the MAF testing parameters. Takes a hex editor.
Last edited by Ed Wright; Nov 22, 2013 at 08:08 AM.
Teching In
Joined: Nov 2013
Posts: 6
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There is no black magic to tuning. Just methodical systems working as one. And learning that system takes patience.
You got this!
