Vortec LT4 hotcam , what bin begin with? can't even start engine :(

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Apr 21, 2010 | 12:14 PM

Dmity Kiev

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Joined: Oct 2006

Posts: 114

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From: Kiev Ukraine

Car: Firebird 91

Engine: Vortec 350 224/230cam, ported head

Transmission: TH700r4 with vette servo,hd oil pum

Axle/Gears: now 3.73 posi old 3.23 posi

Vortec LT4 hotcam , what bin begin with? can't even start engine :(

http://www.summitracing.com/parts/CCA-07-503-8/ hotcam with LS6 springs , AIR GAP intake http://www.summitracing.com/parts/SUM-226019/ , Vortec Heads 350 . can start it . map is always 90-100% , when i use manual vacuum pump ALDL is show map is working good , parameters change from 10 to 100% map. my setup is LT1 camshaft and evethyng work well. I understand that i need specialy beginning bin for LT4 cam for start engine ? or i have mechanical problem ? i use 6965 ECM from caprice. heres stock L05 bin (at this time when she starts map is 96% and shes can up the rpms and seems to realy realy rich), i know what to do with tith bin for LT1 camshaft bud dont know what starting point i need for LT4 cam shaft. thank maby with you help i can start this engine soon

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Last edited by Dmity Kiev; Apr 21, 2010 at 12:35 PM.

Apr 21, 2010 | 12:47 PM

RBob

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From: Chasing Electrons

Car: check

Engine: check

Transmission: check

Re: Vortec LT4 hotcam , what bin begin with? can't even start engine :(

If you are asking for a BIN then this thread will be deleted.

As it is running rich, not surprisingly, you need to reduce the VE tables until you can run the engine. Then do some data logging and use the BLM tables in WinALDL to further tune the VE tables. Then work on the spark.

RBob.