07-12-2008 | #1 |
Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,152
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Secondary relay module questions
There is a post on CF as well, but I had some questions regarding the module.
in that other post, someone said the module was used 90-92 and 93-95 did no and it was in the ECM.. since the replacement ECM is the same for all years (although Kurt's website only states 90-94) then couldn't the module be eliminated and the wiring/harness/ PROM be made to work without the Relay module? I am trying to understand the logic, if the 90 has the module, but I use a ECM that can be used in a 93 in my 90 and it works, I would think you could change something to eliminate the relay module if needed. Now I could be all wrong ont he relay module as I am going by what I read in another post..
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1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978 |
07-12-2008 | #2 |
Join Date: Nov 2006
Location: dayton,ohio
Posts: 425
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Re: Secondary relay module questions
I heard and thought the same thing http://www.zr1netregistry.com/forum/...ead.php?t=5565
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[FONT=Comic Sans MS][COLOR=red]"I wanna go fast!!"[/COLOR][/FONT] [FONT=Comic Sans MS][COLOR=#ff0000]-- Ricky Bobby[/COLOR][/FONT] |
07-12-2008 | #3 | |
Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,152
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Re: Secondary relay module questions
Quote:
Now THAT makes sense.. it was not eliminated just moved.. LOL
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1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978 |
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07-13-2008 | #4 |
Join Date: May 2006
Location: Canada
Posts: 139
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Re: Secondary relay module questions
The secondary injector modules were used for all years. However, the 90 model had a seperate knock module that was later integrated with the ECM. When I had a custom harness made for my 94 LT5 to allow it to run in a 65 coupe the company eliminated the modules and used a relay. They said it would work fine. This appears to make sense since the modules seem to be just an on/off switch. The pulse of the secondary injector is still controlled by the primary injector ground circuit though the ECM. I wasnt confident enough to try this route since I thought the general must have used a more expensive module for some reason. I guess when we cant find any then someone will give it a shot!
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07-17-2008 | #5 | |
Join Date: Nov 2006
Location: dayton,ohio
Posts: 425
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Re: Secondary relay module questions
Quote:
Who made your harness? Might need to figure out a different ignition system someday also.
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[FONT=Comic Sans MS][COLOR=red]"I wanna go fast!!"[/COLOR][/FONT] [FONT=Comic Sans MS][COLOR=#ff0000]-- Ricky Bobby[/COLOR][/FONT] |
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07-18-2008 | #6 | |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,698
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Re: Secondary relay module questions
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07-18-2008 | #7 | |
Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,152
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Re: Secondary relay module questions
Quote:
I need to ook at the wiring but I bet it can be done.. depnding on the signal off of the crank sensor
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1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978 |
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07-18-2008 | #8 | |
Join Date: May 2005
Location: Leesburg, VA
Posts: 2,713
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Re: Secondary relay module questions
Quote:
FWIW, the Northstar went from coil packs to coil-on-plug (much more on-plug than the LSx) for the 2000MY. There was no huge power gain from that.
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Bob Saveland Former owner of #2517 [IMG]http://a.random-image.net/aurora40/vette.jpg[/img] |
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07-18-2008 | #9 | |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,698
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Re: Secondary relay module questions
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07-19-2008 | #10 | |
Join Date: May 2005
Location: Leesburg, VA
Posts: 2,713
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Re: Secondary relay module questions
Quote:
Anyway, I agree coil on plug (or coil near plug on the LSx motors) is definitely better. But 25hp better on a ~400hp motor? That just seems unlikely to me.
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Bob Saveland Former owner of #2517 [IMG]http://a.random-image.net/aurora40/vette.jpg[/img] |
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