armyboyatc

iTrader: (29)

Cam, so what ur sayin is that the strap should be white with the black coming in on the tip of the strap.

ATVracr

iTrader: (5)

Here is one of ours from a couple years ago....

armyboyatc

iTrader: (29)

Wow. I really am lite on timing. We will re tune it and put up some more pics. Thanks for the help.

More power out of this is gonna be awesome.

Zmg00camaross

iTrader: (11)

Its not my car. But thanks for all the info from the pros, helps me out also.

ShiznityZ28

iTrader: (11)

X3... the top shows it just put the strawish color on the strap it needs to peel that off to get a timing mark. I would say its a hair lean but it might just be not enough run time to show the fuel . the plug could also be to cold but again id like to see a full run before telling you to switch. I would go up 1 fuel jet and make at least 1/8 mile pass or 5-6 ish seconds of pull on a highway.

10secZ28

iTrader: (6)

thanks atv and shiz and cam, we will give that a shot a return with the results.

87silverbullet

iTrader: (11)

OP and 10sec z28, what heads do you all have on the car?

I am seeing that you do have a #7 heat range plug but that is a gasket seat style plug and all LS heads have a tapered seat style plug.

Unless you have AFR's or something you are not telling us.

I can see they are r5671a-7's. We run #9's in our AFR headed SBC 406.

armyboyatc

iTrader: (29)

Stock. This is the part number I pulled off of tech in the sticky section. They seal up perfect. No issues.

87silverbullet

iTrader: (11)

You mean this info I found in the sticky?

LS1 Stock and AFR
Thread – 14mm
Reach - .708”
Socket – 5/8 hex
Seat - Taper
Stock Heat Range: 5
Gap: .060
Plug: NGK TR55 (stock number 3951); NGK TR55IX (stock number 7164); Autolite 764; Denso IT-16 (stock number 5325)

Nitrous (one step colder)
Heat Range: 6
Gap: .035 - .038
Plug: NGK TR6 (stock number 4177); NGK TR6IX (stock number 3689); Autolite 103; Denso IT-20 (stock number 5326)

Nitrous (two steps colder)
Heat Range: 7
Gap: Consult
Plug: NGK BR7EF (stock number 3346); NGK TR7IX (stock number 3690); Autolite AR94; Denso IT22 (stock number 5327)

Nitrous (two and a half steps colder)
Heat Range: 8
Gap: Consult
Plug: NGK B8EFS 1049

Nitrous (three steps colder)
Heat Range: 9
Gap: Consult
Plug: NGK B8EFS 1085; Autolite AR93

Nitrous (four steps colder)
Heat Range: 10
Gap: Consult
Plug: NGK R5724-10 (stock number 7993); Autolite AR92
?B10EFS?

armyboyatc

iTrader: (29)

We made some more pulls last night. This was our first pull, 7 - 8 seconds 20 degrees of timing





This is the second pull we did. We added 2 degrees. 7 to 8 second pull. We had trouble reading the plug so we wiped the cad. Off with a T shirt so we could see better. The white on the tip would not come off and when viewed from the side we could clearly see the heat.

armyboyatc

iTrader: (29)

Bump for the new plugs.

ATVracr

iTrader: (5)

Looks a little lean and still no timing.

How much timing do you have in it now?

Also would like to see #7 or 8 plug, they are the hottest on most cars.
Also get one of the others just to compare them.

10secZ28

iTrader: (6)

Atv that is the nuber 7 plug, na base for his tune is 28 degrees I have worked my way to 24 degrees of timing which is where it is now, I started at 20 and it showed no heat, then 22 and the plug above was 24 degrees, this is on 93 octane.

10secZ28

iTrader: (6)

Atv my bad its at 22 degrees

Fbodyjunkie06

iTrader: (10)

Learning a lot here guys, keep it up.

03supercobra

iTrader: (38)

You will start to see heat on the tip first, then it will work it's way down te strap with added timing. It won't color at the bend and skip the tip. Looks to me like you need more fuel, I'd work on the fuel side now and then see what the timing looks like and adjust as needed.

armyboyatc

iTrader: (29)

If we add too much fuel to it, it will mask the timing mark. I will up the fuel a jet or two but what's got me worried is that I have 22 degrees of timing on a 150 shot. I don't want to over time it.

03EBZ06

your plug is too lean and it looks cold. consider a #6 plug and a richer mix.
if you do change plugs, kill off some spark first before testing.

03supercobra

iTrader: (38)

Well then don't add too much fuel to it, try to richen it up a little. Like you said, go up 2 jet sizes and see where it takes you. You can't even see any heat on the strap at the moment.

You don't happen to have a wideband for reference?

armyboyatc

iTrader: (29)

Absolutely no way I'm gonna run TR 6 plugs.
I will do that. I do not believe in a wide band. It's a great reference tool but I like to tune off of plugs.