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CC Advertisers
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10-20-2011, 12:33 AM
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CC Member
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Join Date: Jun 2009
Location: Sydney,
NSW
Cobra Make, Engine: RCM, Jag front and rear, LS3
Posts: 1,640
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Not Ranked
Hi Andrew,
No my crate motor didnt come with a TB. LS3s were scarse when i bought it so i didnt complaint too much. Also it is not a regular crate motor as it came from a W427 HSV.
Double Dip, the hole is about 5mm. In you experience do you think it will make much difference to the idle?
Dave, i have some bars of solder. I was thinking about trying some light heat on the butterfly to warm it up and then melt the solder and rub it on. Kind of like lead loading. If i leave a thin amount on each side of the butterfly when i file it smooth, it should plug the hole without falling out. Not sure if it will work though.
I could always use some nead it. I dont think that would really do any damage if it did come loose unless i was unlikely enought for a valve to close on it.
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10-20-2011, 01:11 AM
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CC Member
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Join Date: Jan 2001
Location: Sunbury,
VIC
Cobra Make, Engine: Rat Rod Racer, LS1 & T56
Posts: 5,391
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Not Ranked
The butterfly is aluminum. You will have a hard time soldering it.
Just try it out before you go changing it. There may be enough adjustment in your idle air motor that it's not an issue.
Cheers
__________________
Mike Murphy
Melbourne Australia
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10-20-2011, 02:30 AM
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CC Member
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Join Date: Jun 2009
Location: Sydney,
NSW
Cobra Make, Engine: RCM, Jag front and rear, LS3
Posts: 1,640
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Not Ranked
Hi mike, pretty sure LS3 is brass or copper. Its gold.
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10-20-2011, 03:20 AM
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CC Member
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Join Date: Jan 2001
Location: Sunbury,
VIC
Cobra Make, Engine: Rat Rod Racer, LS1 & T56
Posts: 5,391
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Not Ranked
Possibly anodized?
__________________
Mike Murphy
Melbourne Australia
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10-20-2011, 03:32 AM
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CC Member
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Join Date: May 2008
Location: Brisbane,
QLD
Cobra Make, Engine:
Posts: 2,797
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Not Ranked
The holes are only meant for early engines without electronic throttle control.
Larger cam etc makes life difficult for a limited IAC valve and programming.
Later electronic throttle bodies don't have holes.
__________________
Gary
Gold Certified Holden Technician
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10-20-2011, 04:21 AM
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CC Member
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Join Date: Nov 2009
Location: Cheltenham,
Vic
Cobra Make, Engine: Classic Revival CR3516, LS3, Aussie Mike'd T-56, 3.70 LSD, AP brakes, Penske shocks
Posts: 1,616
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Not Ranked
Quote:
Originally Posted by Zedn
Hi Andrew,
Also it is not a regular crate motor as it came from a W427 HSV.
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huh? Don't W427 have LS7?
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BUILD-BLOG: http://cobrablog.holnet.net
Ben in AU
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10-20-2011, 07:33 AM
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CC Member
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Join Date: Apr 2007
Cobra Make, Engine:
Posts: 102
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Quote:
Originally Posted by Zedn
Double Dip, the hole is about 5mm. In you experience do you think it will make much difference to the idle?
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the idle will be fairly high with this hole...
so you have a Brass bladed throttle body... make sure you have the correct ecu for it then..otherwise you will have problems
they drill holes in them to get the engine to idle at a decent speed when a big cam is inserted...
__________________
www.ultimateconversionwiring.com.au
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10-20-2011, 02:04 PM
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CC Member
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Join Date: Jun 2009
Location: Sydney,
NSW
Cobra Make, Engine: RCM, Jag front and rear, LS3
Posts: 1,640
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Not Ranked
I hope i have the correct ECU. I was told it was out of an LS3 with securities removed.
I was told this TB is also off an LS3.
Does this sound correct? Is there a number on the ECU to look for?
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10-20-2011, 03:03 PM
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CC Member
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Join Date: Apr 2007
Cobra Make, Engine:
Posts: 102
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Quote:
Originally Posted by Zedn
I hope i have the correct ECU. I was told it was out of an LS3 with securities removed.
I was told this TB is also off an LS3.
Does this sound correct? Is there a number on the ECU to look for?
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Service # 12625455
or
Service # 12633238
not sure what you paid for your throttle body but might be something worth considering getting the one of Jim... just be very careful about heat near the butterfly as they warp real easy.. has seen heaps of shops try and modify them (some successful , others not).. plus be very careful with the solder/ rivet ideas... i wouldnt want to go dropping anything into the intake of my car while running..
__________________
www.ultimateconversionwiring.com.au
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10-21-2011, 01:58 AM
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CC Member
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Join Date: Jun 2009
Location: Sydney,
NSW
Cobra Make, Engine: RCM, Jag front and rear, LS3
Posts: 1,640
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Not Ranked
Quote:
Originally Posted by Doubledip
Service # 12625455
or
Service # 12633238
not sure what you paid for your throttle body but might be something worth considering getting the one of Jim... just be very careful about heat near the butterfly as they warp real easy.. has seen heaps of shops try and modify them (some successful , others not).. plus be very careful with the solder/ rivet ideas... i wouldnt want to go dropping anything into the intake of my car while running..
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its 12612384
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