Opti alternative? [Forums - C4 Technical]

C4 Technical > Opti alternative?
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BrianCunningham	Opti alternative?	#1
Senior Guru Boston, MA for the most part :) 7763 Posts Member since: 2007/12/30 0:00	For now, I'm sticking with the opti, just bought an MSD unit. But for those looking for an alternative. Getting the dash to work might be a real PITA though http://www.eficonnection.com/eficonnection/coil_per_cylinder.aspx
	Posted on: 2009/1/5 2:11
	_________________ Polo Green 95 LT1 6-spd http://mysite.verizon.net/vzevcp74/ 383 LT1/Vortech Supercharger/AFR heads/Rod end suspension/Penske-Hardbar dual rate coilovers/Wilwood 6pot brakes NCCC Governor: http://BayStateCorvetteClub.com
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Matatk	Re: Opti alternative?	#2
Webmaster SW Chicago Burbs 22805 Posts Member since: 2008/1/7 0:00	Check these out, as well. http://www.bailey-eng.com/LTCC.html http://delteq.com/ Matthew
	Posted on: 2009/1/5 2:38
	_________________ 2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP
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Aboatguy	Re: Opti alternative?	#3
Senior Guru My Avatar was redistributed! 498 Posts Member since: 2007/12/3 0:00	Quote: BrianCunningham wrote: For now, I'm sticking with the opti, just bought an MSD unit. But for those looking for an alternative. Getting the dash to work might be a real PITA though http://www.eficonnection.com/eficonnection/coil_per_cylinder.aspx Interesting link..... but not as interesting as your avitar.... Too bad keeping the factory dash is a sticking point with opti-replacement
	Posted on: 2009/1/5 2:40

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BrianCunningham	Re: Opti alternative?	#4
Senior Guru Boston, MA for the most part :) 7763 Posts Member since: 2007/12/30 0:00	How are people doing it with a full LSX swap?
	Posted on: 2009/1/5 2:44
	_________________ Polo Green 95 LT1 6-spd http://mysite.verizon.net/vzevcp74/ 383 LT1/Vortech Supercharger/AFR heads/Rod end suspension/Penske-Hardbar dual rate coilovers/Wilwood 6pot brakes NCCC Governor: http://BayStateCorvetteClub.com
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pianoguy	Re: Opti alternative?	#5
Guru Emeritus Apple Valley, MN 14762 Posts Member since: 2007/12/29 0:00	Too bad that's not a bit more plug-and-play - having LS engine management would be outstanding.
	Posted on: 2009/1/5 2:55
	_________________ 1996 LT4 �Before you criticize someone, you should walk a mile in their shoes. That way when you criticize them, you are a mile away from them and you have their shoes.�- Jack Handey
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bogus	Re: Opti alternative?	#6
Grand Imperial Pooh-Bah San Pedro, CA 20859 Posts Member since: 2005/9/7 0:00	Quote: BrianCunningham wrote: How are people doing it with a full LSX swap? They use the LSx PCM. I have the LTCC and it has been there for over 6 years. It has been VERY durable. The LTCC uses the existing opti as the crank sensor and fuel timing. The upside is that you don't have to get a new PCM or all the mechanical upgrades. The only thing to address is the location of the LTCC box. It is NOT happy with heat... so it must stay cool. The best place to put it is in the left headlight bucket. I rewrote the installation manual for Bob a number of years back. He did the LTCC for the Camaro and b-bodies, hense, he was unaware of the special needs of the 1992 Corvette. I HIGHLY recommend the LTCC.
	Posted on: 2009/1/5 3:44
	_________________ The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me
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BrianCunningham	Re: Opti alternative?	#7
Senior Guru Boston, MA for the most part :) 7763 Posts Member since: 2007/12/30 0:00	are they still selling the LTCC? Been posts "over there" about them not. Besides, you still need the opti for the timing signal With this you don't. Quote: bogus wrote: Quote: BrianCunningham wrote: How are people doing it with a full LSX swap? They use the LSx PCM. But how do they interface it with the dash?
	Posted on: 2009/1/5 3:49
	_________________ Polo Green 95 LT1 6-spd http://mysite.verizon.net/vzevcp74/ 383 LT1/Vortech Supercharger/AFR heads/Rod end suspension/Penske-Hardbar dual rate coilovers/Wilwood 6pot brakes NCCC Governor: http://BayStateCorvetteClub.com
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bogus	Re: Opti alternative?	#8
Grand Imperial Pooh-Bah San Pedro, CA 20859 Posts Member since: 2005/9/7 0:00	The dash interface is the big issue. I don't know how they get around that. The earlier dash is easy; the atari dash still uses conventional signals. The ABS is a purely stand-alone system, as is the climate control. The later style, with the CCM is the problem. The CCM needs engine data (vehicle speed from the VSS is #1). Without that, you lose ABS/ASR... I still haven't figured out the way to fix this... unless the CCM can be tapped into the VSS to satisfy its need. Otherwise, the CCM handles VATS and that's about it. The page still populates for the LTCC stuff... donno if that means anything, tho.
	Posted on: 2009/1/5 4:04
	_________________ The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me
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Schrade	Re: Opti alternative?	#9
Elite Guru eastern NC / e-i-e-i-o 1909 Posts Member since: 2008/8/15 2:01	What does the 'Test Vehicle' have now? Does the 'Coil per cylinder' work on every one of these setups? Quote: This S10 was originally a 1982 GMC Sonoma that went through the following changes: * 1986 S10 4x4 Frame * 1986 S10 Dash * 1986 2.8L V6 Engine * 1993 S10 Grille * Choo Choo Customs Fiberglass "Wildside" Bed * Choo Choo Customs Fiberglass Front Fascia * 1987 5.7L Tuned Port Injection Engine * 700R4 Transmission * 1993 Typhoon Drivetrain * 1996 Z-28 Rear Disc Brakes * 1995 S10 4x4 Frame * 1993 S10 Digital Instrument Cluster * 5.7L Engine, LT1 Intake Manifold, LT4 HOT Cam * 4L60E Transmission * 5.7L Ram Jet 350 Intake Manifold, Coil per Cylinder, Electronic Throttle This page was last updated 9/10/08.
	Posted on: 2009/1/5 10:31
	_________________ LT5, Marc Haibeck ECM module, AUTOMATIC!!!
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anesthes	Re: Opti alternative?	#10
Master Guru Boston, MA 646 Posts Member since: 2008/6/18 18:02	Quote: bogus wrote: The dash interface is the big issue. I don't know how they get around that. The earlier dash is easy; the atari dash still uses conventional signals. The ABS is a purely stand-alone system, as is the climate control. The later style, with the CCM is the problem. The CCM needs engine data (vehicle speed from the VSS is #1). Without that, you lose ABS/ASR... That part is easy. 4k PPM signal. Most of the fbody guys use a dakota digital converter. http://members.cisdi.com/~anesthes/dash/ Quote: bogus wrote: I still haven't figured out the way to fix this... unless the CCM can be tapped into the VSS to satisfy its need. Otherwise, the CCM handles VATS and that's about it. The page still populates for the LTCC stuff... donno if that means anything, tho. 4k PPM from the dakota box into the CCM/BCM. In theory, the CCM will master the aldl comm too. If the ECM is 'missing' it might trip a sys light, in which case I'd pull the bulb. Everything else on the cluster is a "normal input".. The odometer is the only issue with the late style dashes, and the reason I abandoned my dash swap. S10wildside - a thirdgen.org member owns EFI connection (Brian's first link).. These guys have been working on some pretty neat stuff. I'd switch to an LS1 ECM if it didn't have a 750cfm read limit. -- Joe
	Posted on: 2009/1/6 3:12

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BrianCunningham	Re: Opti alternative?	#11
Senior Guru Boston, MA for the most part :) 7763 Posts Member since: 2007/12/30 0:00	750cfm???
	Posted on: 2009/1/6 3:42
	_________________ Polo Green 95 LT1 6-spd http://mysite.verizon.net/vzevcp74/ 383 LT1/Vortech Supercharger/AFR heads/Rod end suspension/Penske-Hardbar dual rate coilovers/Wilwood 6pot brakes NCCC Governor: http://BayStateCorvetteClub.com
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anesthes	Re: Opti alternative?	#12
Master Guru Boston, MA 646 Posts Member since: 2008/6/18 18:02	Quote: BrianCunningham wrote: 750cfm??? Yes, if you convert it out it won't read higher than 750CFM or so CFM. If your moving more air than that (blower) you'll end up using RPM vs TPS / PE to add extra fuel based on an RPM guess. I'm not 10000% sure all code masks have the same limitation, but considering the voltage / gram output is the same on all the GM MAF's for vortec/lsx I don't see how you would get it to read higher unless you modified the code and bought a MAF with an adjustable output. -- Joe
	Posted on: 2009/1/6 12:37

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BrianCunningham	Re: Opti alternative?	#13
Senior Guru Boston, MA for the most part :) 7763 Posts Member since: 2007/12/30 0:00	Check this out, just the remote WP would fix a lot of problems. [QUOTE]STL94LT1; I caught this on the camaroz28 forum, looks very interesting. He's also running a remote electric water pump. [IMG]http://i116.photobucket.com/albums/o4/roadtrip120/Jesselbeltdriveinstall001.jpg[/IMG][/QUOTE]
	Posted on: 2009/2/11 22:28
	_________________ Polo Green 95 LT1 6-spd http://mysite.verizon.net/vzevcp74/ 383 LT1/Vortech Supercharger/AFR heads/Rod end suspension/Penske-Hardbar dual rate coilovers/Wilwood 6pot brakes NCCC Governor: http://BayStateCorvetteClub.com
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Schrade	Re: Opti alternative?	#14
Elite Guru eastern NC / e-i-e-i-o 1909 Posts Member since: 2008/8/15 2:01	Quote: anesthes wrote: I'd switch to an LS1 ECM if it didn't have a 750cfm read limit. -- Joe Is the CFM measurement scale linear, or logarithmic? If linear, then you could re-assign the range of values from 0CFM=0CFM, all the way to 750CFM=1100CFM (if your blower max'es at 1100CFM, for example). If the scale is logarithmic in the LS1 ECM, your value curve would have to be totally synchronous in the 'lookup' tables...
	Posted on: 2009/2/12 4:05
	_________________ LT5, Marc Haibeck ECM module, AUTOMATIC!!!
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VetteUSA	Re: Opti alternative?	#15
Guru Newb 103 Posts Member since: 2006/9/14 0:00	Another alternative is to just buy a ZR1.
	Posted on: 2009/2/12 4:23

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BrianCunningham	Re: Opti alternative?	#16
Senior Guru Boston, MA for the most part :) 7763 Posts Member since: 2007/12/30 0:00	I can do w/o the extra 300lbs :o Though that raises an interesting question of how hard would it be to put the LT5 coil packs on an LT1. For the record, except for a cap & rotor @ 110k, mine's been running fine. I'm just putting alternatives out there. I've already bought an MSD opti.
	Posted on: 2009/2/12 5:19
	_________________ Polo Green 95 LT1 6-spd http://mysite.verizon.net/vzevcp74/ 383 LT1/Vortech Supercharger/AFR heads/Rod end suspension/Penske-Hardbar dual rate coilovers/Wilwood 6pot brakes NCCC Governor: http://BayStateCorvetteClub.com
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VetteUSA	Re: Opti alternative?	#17
Guru Newb 103 Posts Member since: 2006/9/14 0:00	if/when (knock on wood) my opti goes out, i've wondered which route i'd go. I could go with the coil packs, (for some reason Delteq is the brand I always remember when thinking of coil packs for the LT1), or i'd buy an MSD opti, and most likely I would go with the MSD. The optis are fairly robust anyway, the only time they usually go bad is when there's a water pump failure. I wonder if the actual installation time for the coil packs takes about the same time as just swapping in a new opti. Let's just hope my current opti never goes bad and that I'll never have to make the decision.
	Posted on: 2009/2/12 5:35

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bogus	Re: Opti alternative?	#18
Grand Imperial Pooh-Bah San Pedro, CA 20859 Posts Member since: 2005/9/7 0:00	The solution for the 750cfm limit might just be the ZR1 code mask... just a though.
	Posted on: 2009/2/12 7:08
	_________________ The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me
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