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| Author: | KJ kyle [ Sun Jan 25, 2009 3:57 pm ] |
| Post subject: | spark plugs |
how do i choose spark plugs for a motor i just built with basically all aftermarket parts? |
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| Author: | InCommando [ Sun Jan 25, 2009 4:08 pm ] |
| Post subject: | |
Most aftermarket parts ( pistons/heads/etc...) are designed around the factory plugs and should say you need a shorter reach plug if they do not use the factory plug. Every engine I have had with aftermarket pistons, even the 11:1's, used the stock reach plug. If you have doubts, you should check with the various manufacturers of the parts you have. |
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| Author: | XR [ Sun Jan 25, 2009 7:12 pm ] |
| Post subject: | |
Run whatever is recommended stock-GENTLY.Then read the plugs and go from there.What engine are we talking about? |
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| Author: | KJ kyle [ Sun Jan 25, 2009 8:27 pm ] |
| Post subject: | |
chevy small block 383 stroker. 9.5:1 hyperutectics, 2.02 / 1.60 heads cast heads, .484 lift cam... |
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| Author: | InCommando [ Sun Jan 25, 2009 8:35 pm ] |
| Post subject: | |
Unless you used aftermarket heads and they specifiy something else, plain ol' small block plugs are probably where to start. |
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| Author: | TAHOE [ Sun Jan 25, 2009 9:23 pm ] |
| Post subject: | |
You may want to run a cooler plug, one step below stock maybe. Stock plug should work fine unless you used after market heads. You can always bring #1 up to TDC, put some type of marking pencil/wax/etc on end of plug and screw in, then remove and see if there is marks on end of plug and top of piston. |
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| Author: | XR [ Sun Jan 25, 2009 10:36 pm ] |
| Post subject: | |
Colder plugs are NOT for tuning.Since you still have a cast iron head go with a quality plug in the stock heat range. |
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