ok im running 20 psi on a built l61 im just curious what spark plug would be best to run?
I work for NGK spark plugs and can look it up whats your compression ratio? If its stock we would recomend 2 steps colder for that boost range and you may want to look into a non projected tip.
cool thanks. im running 8.9 compression
Ok starting out with the compression we will want to use a 5 heat range plug in there plus 2 colder for the boost so we are at a 7.
so our only real option for a upgrade is a LTR7EIX-11-- stk number 5610. This plug is a .5 millimeter longer in the firing position which is from the end of the threads to the firing electrode. As long as you do not have doned pistons you should be fine.
If you have any other questions please feel free to ask.
ok im going to see if I can get those. but I am also thinking I can run the samew plugs that are in my ss hhr. cause I run 25 psi on it and it runs fine and has a 9.0 compression. plus I have those in stock at work. but I will try and find those ngks as well.
ok I called orielly's and they have LTR7IX-11 and the stock number is 6510. is that the right ones? cause he is saying that he can't find LTR7EIX-11 stock number 5610
let me know thanks
Yes those are fine. No difference. make sure to gap them properly
The LTR7IX-11 plugs are actually the same exact length as the stock ACDelcos.
its an old concept. time for something new to take the reigns. - Z yaaaa
man, wish i knew about these spark plugs that threw 20psi into your motor!
just ordered an M62! such a waste of money! spark plugs are way cheaper!
jkjk
funny title
LTR7IX-11 here, stock compression but will be 20+psi soon. Ran them on 7.5-16psi with no issues. I believe I'm gapped at .032?
jason norwood wrote:I work for NGK spark plugs and can look it up whats your compression ratio? If its stock we would recomend 2 steps colder for that boost range and you may want to look into a non projected tip.
I have to ask, does NGK still make some AC Delco plugs? I got a kick out of opening a box of 41-980's and they all said NGK on them.
Yes we do. We make a lot of OE plugs , most people don't know that but its a matter of whether when we were the OE supplier for the big car companies if they will allow our logo on the plug. But yes we make a lot of the Ac Delco plugs.
I'm still curious about the 41-110 Iridium, I've got no idea on the heat range, and the thread reach looks similar to our stock 41-942's and #12's. If you happen to know that one, that would be awesome. I'm pretty sure that one is made by NGK.
jason norwood wrote:Yes those are fine. No difference. make sure to gap them properly
thanks man. I really apperciate all the help
