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#1 |
Registered User
Join Date: Nov 2009
Location: Mesa, AZ
Posts: 226
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HEI cap and rotor
Are these standard pieces, or did they change a lot over the years? The PO on my truck converted it to HEI, and I want to get a new cap and rotor, but am not sure what to ask for at the parts store.
Also, if you pull a plug wire at the dist with the truck running and the visible spark from the cap is intermittent only, does that mean I have an issue, or does it not necessarily produce a visible spark with every rotation with the wire off? As stated in several other threads, I'm trying to track down a power loss / backfiring issue and am going through the whole ignition. Plugs were done yesterday...I'll do wires today, and a cap and rotor if there's no difference there. Timing is about 10 degrees at 850rpm. Should that be backed off a bit...say to 6 degrees? |
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#2 |
Junior Member
Join Date: Dec 2006
Location: Southeast Missouri
Posts: 2,436
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Re: HEI cap and rotor
If it is the type Hei with the coil in the cap it is pretty much standard for quite a few years.
I usually ask for cap and rotor kit for a 77, other years would fit ok also but I can not remember the year range. I usually go on either the O'Rielly or Auto Zone web-sites and check things out. Danny
__________________
'67 Chevy C-20 short stepper - build complete, 454/SM-465. '75 C-30 Single Cab DRW-350 small block/NP-435. '77 GMC-6500 Dump Truck, 427 Tall Deck. '92 GMC K-3500 Duallie, 454/4L80E. |
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#3 |
Junior Member
Join Date: Dec 2006
Location: Southeast Missouri
Posts: 2,436
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Re: HEI cap and rotor
My son usually sets the timing at 12 at idle with the vacuum advance hose disconnected and plugged to start.
Danny
__________________
'67 Chevy C-20 short stepper - build complete, 454/SM-465. '75 C-30 Single Cab DRW-350 small block/NP-435. '77 GMC-6500 Dump Truck, 427 Tall Deck. '92 GMC K-3500 Duallie, 454/4L80E. |
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#4 |
Registered User
Join Date: Nov 2009
Location: Mesa, AZ
Posts: 226
|
Re: HEI cap and rotor
OK...I didn't disco the vacuum. I'll do that and check it again.
thanks. |
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