Standalone or not to standalone
#46
02-10-2011, 10:22 AM
Not true. At least at WOT on all of the LS1 cars I've seen and helped tune over the years if you put a O2 on a sniffer with a car that has cats, and then put an O2 after the Merge collector (pre-cats) the a/fs have been close to a point different.
#47
02-10-2011, 10:24 AM
Our emissions are pretty brutal here in Texas as well. I miss 10 years ago almost when I had my supercharged 98 Cobra and my emissions testing was going to Jiffy Lube and taking my buddy for a spin in the car and getting my sticker for $15 LOL!
#48
02-10-2011, 10:28 AM
#49
02-10-2011, 10:31 AM
Join Date: Jul 2010
Location: Long island NY
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I still don't see the advantage of a using standalone over Bosch 7.8DME, except if you want to tune it yourself. Correct me if I'm wrong but my understanding is that most people, including race teams, can't crack the 7.8 DME code so they use something they can tune like a Motec. Proto and others have built high HP cars on E85 where much greater fuel delivery is needed using 160 lb injectors, extra pump, etc.. The 7.8 DME does an excellent job on big HP cars and you don't have to worry about smog. Heck you can pass emissions with a catless system, if you have the right tune.
#50
02-10-2011, 10:35 AM
How is that? A 160 lb injector is a 160 lb injector regardless of whether you inject E85, gas, or whatever else.
#51
02-10-2011, 10:56 AM
Join Date: Jul 2010
Location: Long island NY
Posts: 3,319
Rep Power: 379 Look at the specific gravity of the two fuels. You need roughly twice the injector to run E85 to make the same power. so the trims are very close for a 80 lbs gas motor making 800 hp and a 160 lbs E85 motor making 800hp.
#52
02-10-2011, 11:01 AM
It's not the specific gravity that matters here. It's the BTU difference between the two different fuels but that's not really the issue. It's the duty cycle that matters. Don't get me wrong but I think your project will be loads of fun. That alone is reason enough to mess around with a standalone. Since you were asking for opinions, I just thought I'd chime in and mix it up a bit.
#53
02-10-2011, 03:15 PM
Join Date: Jul 2010
Location: Long island NY
Posts: 3,319
Rep Power: 379 It's not the specific gravity that matters here. It's the BTU difference between the two different fuels but that's not really the issue. It's the duty cycle that matters. Don't get me wrong but I think your project will be loads of fun. That alone is reason enough to mess around with a standalone. Since you were asking for opinions, I just thought I'd chime in and mix it up a bit.
. I was runnig 1000cc LOW impedence injectors 2 1/2 years ago on my stock DME. anything over and idle was a dream..
#54
02-10-2011, 06:36 PM
I'm not trying to be a ball buster
but I just can't believe you go through all that work to get an inspection sticker. I have an off road set up as well but I don't go through all that trouble when it comes time for inspection.
If I wanted to really get a Motec I would definitely not let that be the decision that stopped me from getting one, or a TT Gallardo. My decision that stops me from getting toys like that is more of a monetary choice as I cannot afford that, not a state inspection.
I could just imagine telling my friends that I want to get a TT Gallardo but I won't be able to get an inspection so I decided against it. I would never hear the end of it.
You can PM me when you need to get the car inspected, maybe I can steer you in the right direction.
#55
02-10-2011, 06:47 PM
not for the 02's but i do get an occasional check engine light for misfires on cold start with the VP120...
Yes you are but that's ok.....
all what work?It almost takes me longer to get the car on the lift then it does to remove the eight bolts to swap out straight pipes.....
I would .......especially if there is no chance (nevermind a little or a lot of work) of getting a full Motec setup to pass emissions.
Your right I'm a poser
No thanks.....
Yes you are but that's ok.....
all what work?It almost takes me longer to get the car on the lift then it does to remove the eight bolts to swap out straight pipes.....
I would .......especially if there is no chance (nevermind a little or a lot of work) of getting a full Motec setup to pass emissions.
Your right I'm a poser
No thanks.....
lmao.
#57
02-10-2011, 09:38 PM
Join Date: Jul 2010
Location: Long island NY
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The DME preforms self tests and dumps extra fuel to see the secondary O'2 response time and delay to inputs plus reading value. That is why the simulators do not work and if you pull the O'2 to far out of the exhaust stream. Your tune can be the holy grail of tunes but without cats your secondary O'2s will trigger a CEL. 997's are different DME's
#58
02-10-2011, 10:48 PM
We are utilizing a Link System with a Motec Dash. The reason we went to Link was to control the dual phased injectors and dual drive by wire servo motors. The motor idle with the smaller injectors is outstanding. The larger injectors phase in on demand. The wiring harness was designed to plug into the existing wiring harness ...... no splicing.
The motor uses Speed Density, however a MAF is kept in the loop to operate (provide feedback) for certain non motor functions along with a certain other function.
The motor uses Speed Density, however a MAF is kept in the loop to operate (provide feedback) for certain non motor functions along with a certain other function.
Last edited by cjv; 02-10-2011 at 10:59 PM.
#59
02-10-2011, 11:52 PM
The DME preforms self tests and dumps extra fuel to see the secondary O'2 response time and delay to inputs plus reading value. That is why the simulators do not work and if you pull the O'2 to far out of the exhaust stream. Your tune can be the holy grail of tunes but without cats your secondary O'2s will trigger a CEL. 997's are different DME's
#60
02-11-2011, 04:21 AM
Join Date: Jul 2010
Location: Long island NY
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LOL.. The fun left with the simple bolt ons! Its more of a exercise for my mind to give me something other then business to think about. Plus my workshop is in my warehouse so I can clear my mind at anytime..