NGK BKR5E vs Accel 574S shorty spark plugs

With the small block chevy that's in our 1953 Chevy pickup, we had to use block hugger headers in order to clear the frame and steering linkage. These headers require the use of shorty spark plugs, and we were running Accel 574S plugs in our old 283 engine. When we swapped the 283 for a 350, we had to get new shorty plugs as heads were different on the new engine. We found that the Accel plugs are now around $80 for a set of 8, which is ridiculous. The engine manufacturer recommended NGK BKR5E, which are around $20 for a set of 8, so we ordered some to see how close in size they are to the Accel plugs. Measuring from where each plug seats in the head, there is only about 1/8" difference in length. We installed the NGK plugs in the engine with the headers on, and the plug boots still have minimal clearance, so we're going to leave these and and then check them throughout the engine break in period. For now, though, they look like they should work just fine, and at a fraction of the cost of the Accels.

[@maxoklock4805]

NGK TR5 is IIRC what U need for a fairly short tapered seat plug much like the Accel. I remember using those in a SBC in a van back in the day, one cyl on the RH side was a pain right near the dipstick tube with the stock AC CR43TS but the TR5 was just enough shorter to make that job easier. The BKR5E is a really good replacement for heads that use a crush washer RC12YC Champion type plug. If U need a .040” gap use NGK BKR5ES-11 they will be pre-set for that

[@1j007zm]

NGK also makes shorty spark plugs

[@sciencemathematics9502]

❤❤

[@user-rv1cp8jt1l]

Will the NGK spark plug also work in a 78 small block Chevy 305

[@wreckanchor]

no but the Accel will.

[@yourmom705]

1/8 is all you need to burn your wire boot