spark pluug gap and tranny question - ZR-1 Net Registry Forums

Anonymous · 12-14-2003

Does anyone know what the plug gap for the LT5 is? and also does anyone know if there is an adaptor I can buy to fit a chevy big block to the ZR1 tranny? I have a complete ZR1 clutch and all it needs a motor and I have a 502 I wanted to put in it?

Anonymous · 12-14-2003

0.050 in

Anonymous · 12-14-2003

Joseph

Mon:Not trying to contradict you but in service manual under Ignition system page # 6D4-11 Spark Plug Gap (VIN J)...9mm(0.035")Spark Plug Gap (VIN P)...1.27mm(O.050")I assume the manual is correct ??

Anonymous · 12-14-2003

Mom man help me out here, I also thought it was 50 but read other posts that it was 35 my L98 is 35 so please help me out here I just put new plugs in at 35 but now I think I need to pull them and regap to 50 I await your info thanks man.

Anonymous · 12-14-2003

Sorry 35 is correct but I always ran mine at 50 for a little extra boost. :-) You can set them anyway from 035 to 050.

Anonymous · 12-14-2003

I SET mine @0.050 as well it seems to like it.

freemans1 · 08-31-2005

Does anyone know the implications of gapping spark plugs at .050 as opposed to .035. All the books I have read say .035. What does gapping at .050 give you and at what cost. It has been alluded that in order to do this the ignition coils must be able to support a spark at a higher voltage. Does anyone know what voltage the coils actually sustain. Example: the C5 coils support up to 50K volts per cylinder. (A friend has his class III modified C5, 475/420 HP, running .080 gap) I cannot find what the LT5 supports.
Please explain at your earliest convenience as I have a race on Friday.

Scott Freeman
91, Triflow, K&N, ported/planed plenum, Rippie chip

ZWILD1 · 09-05-2005

I asked Marc Haibeck about plug gap a few months ago. He told me 35 to 60. He said the larger gap was used by dealers in service bulletins on the later cars. He also said the larger gap would help smooth out the idle . It is just preference. I set mine at 45, car seems to run just fine.

Nick · 09-05-2005

.035 for the early cars, .050 for the later cars.

12-14-2003	#1
Anonymous Join Date: Dec 2003 Posts: 491	spark pluug gap and tranny question Does anyone know what the plug gap for the LT5 is? and also does anyone know if there is an adaptor I can buy to fit a chevy big block to the ZR1 tranny? I have a complete ZR1 clutch and all it needs a motor and I have a 502 I wanted to put in it?

08-31-2005	#7
freemans1 Join Date: Aug 2005 Location: Sierra Vista, AZ Posts: 3	Spark plug gapping. Does anyone know the implications of gapping spark plugs at .050 as opposed to .035. All the books I have read say .035. What does gapping at .050 give you and at what cost. It has been alluded that in order to do this the ignition coils must be able to support a spark at a higher voltage. Does anyone know what voltage the coils actually sustain. Example: the C5 coils support up to 50K volts per cylinder. (A friend has his class III modified C5, 475/420 HP, running .080 gap) I cannot find what the LT5 supports. Please explain at your earliest convenience as I have a race on Friday. Scott Freeman 91, Triflow, K&N, ported/planed plenum, Rippie chip

09-05-2005	#8
ZWILD1 Join Date: Aug 2004 Location: Spring Grove ,Pa. Posts: 256	I asked Marc Haibeck about plug gap a few months ago. He told me 35 to 60. He said the larger gap was used by dealers in service bulletins on the later cars. He also said the larger gap would help smooth out the idle . It is just preference. I set mine at 45, car seems to run just fine. __________________ 91 Turquoise Metallic Haibeck 525 #0134

09-05-2005	#9
Nick Join Date: Jul 2005 Location: Auburn, Washington Posts: 586	.035 for the early cars, .050 for the later cars. __________________ Nick ZR-1 Net Registry Founding Member #32 - lapsed...