I have rams horn exhaust on an otherwise stock 1995 LT1 350. Can anyone recommend a shorty spark plug for this engine so I can get more clearance for spark plug boot? The commonly recommended Accel shorty plugs have a shorter reach as well as shorter length from seat to top terminal than the stock plugs. Does that make a difference?

 

When you say, "ram's horn manifolds", do you mean C-2/C-3 Corvette style manifolds, or stock 4th generation Camaro/Firebird manifolds?

 

I meant an aftermarket version similar to the older Corvette manifolds.

 

In reading my original post again, perhaps I wasn't clear about my concern. I'm wondering if the shorter reach of the plugs into the combustion chamber is a problem (18 mm stock vs 12 mm shorty).

 

I think the short plugs are short on the plug wire side. How far they stick into the head should be the same depth as stock.

 

The only short plug I could find with reach inside the combustion chamber same as stock was an Accel plug that sells for around $35 EACH. Way out of my budget. Others with a shorter reach are more reasonable in cost. That's why I was asking if the reach makes a difference, which I assume would be the case, but I thought someone might have actual experience with it.

 

Reach ? as in threads or projected Vs non-projected tips ? I was running BR7 non-projected tip for some planed use of a little spray, which I never did.....yet.

 

The following is copied from NGK's website: "A spark plugs reach is calculated by the length of the threads. It is measured from the seat of the plug to the end of the threads; it does not include the electrodes, or an extended metal shell. When custom-selecting a spark plug, the electrode length and projection should be included in the calculation when taking into consideration the clearance in the combustion chamber."

This what I'm asking about.

 

No you shouldn't do that. You need the same length threads as the stock plugs.

 

I looked at Jegs and the Accel short plugs come in sets of 4 or 8 for between $38-$53 depending on what plug you need.

 

Thanks to all for responding. I think I'll have to find another solution besides the short plugs. There's always a way. May go with ceramic boot wires.

 

I'm using these, but there may be other/better out there ?

Design Engineering DEI 10552 DEI Protect-A-Boots | Summit Racing

 

How close are those boots to the exhaust, Doug? Touching? I assume you're happy with them.

 

I've used those boots and they work fine. Last I checked there were no burn marks on my wires.

 

While I do have headers, and they're ceramic coated (DynaTech), it was only extra precaution. The boot covers do touch on a few, and look fine.