egt temps

[81camaro383]

I was running ngk 8 and 45 on gap with 92 jets and temps was 1260-1300 now im running ngk 7 with 35 gap and 94 jets still is running 1253-1288 why wont it go down any

[butterbean]

because its still to lean, go up a few more jet sizes and see what happens? I like mine between 1200-1250 so its close

[81camaro383]

Ok see i was thinking im push unburnt fuel out but maybe not just between them to setups the mph is about the same im only running a 750 carb wonder how far i can go up

[81camaro383]

Im also running 36 on timing on my sbc im about 12:7:1 on compression i know about a month ago the timing was way to high so i turn it down thats when the egt went up

[triplenickel]

Hey Brad.
Retarding the timing is the cause of your higher EGT.

[81camaro383]

Show do i need to turn it up to 38 or throw jet in it

[triplenickel]

how did retarding the timing affect the performance?

[81camaro383]

Not much still ran a 6.7's this weekend at terra haute and ran a 6.8's at brown county ran the same

[81camaro383]

What got me messing with the timing is it started cranking hard so i thought id check it well it must of moved or something cause is was like 40-42 so i turn it to 36 and its been like that for a bit now

[triplenickel]

well, as odd as it may seem, the 2 changes you made actually cooled down the combustion chamber temp, so you safer than you were.

[triplenickel]

Read Adam's post on reading spark plugs. its very informative. it will help you get the timing correct. Can you post up a good pic of a couple of your plugs?

[81camaro383]

So with the new plugs which is hotter and smaller gap is colder than the first tune i had big gap and colder plug....it dont load up at big end after a pass

[81camaro383]

Ill try ive got 10 pass on these ngk 7 plugs and show nothing with the ngk 8 i saw pepper when the timing moved so when i moved it i check them before switching to the new tune there was none these ngk 7 has no pepper on them the timing is dead on u can see it right as the ground strap bends u can see the firing on it

[triplenickel]

the ground strap ( or electrode) is where you read for timing. You want to see heat from the end to just around the bend. Where the heat stops, there will be some blue or rainbow looking colors.

[triplenickel]

sorry, didnt see your post about plugs before I posted. now you need to look at the ring where the ground strap attaches. should have heat 3/4 of the way around.