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Oh that's right, if you start seeing heat down in the threads then that's bad umkay.
I've gotta get this straight lol.
You want that timing mark to be around the middle of the bend on the strap. A little harder to get good readings on a street driven car, gotta find a good back road and make a pull then shut it down
You want that timing mark to be around the middle of the bend on the strap. A little harder to get good readings on a street driven car, gotta find a good back road and make a pull then shut it down
That's the trouble I'm having, not a lot of long, flat straight roads around here let alone one with an area I can shut down and pull plugs.
Wondering if dyno tuning might be a solution, can't track it because I'll definitely get the boot lol.
Anyway, back to the OP's topic.
You want that timing mark to be around the middle of the bend on the strap. A little harder to get good readings on a street driven car, gotta find a good back road and make a pull then shut it down
I don't agree. That's more of an NA tune up rule.
For a forced induction "safe tune". If you are into the bend or the 2nd thread you are too hot from everything I've read and seen. A safe tune is just nipping into the 1st thread and half way down the bend like so. That is a pump gas tune up though. E85 plugs will have almost no coloring, but the heat mark will be the same.
High power setups tend to make a more pronounced heat mark on the strap, especially boosted setups. Shutting down after a pull isn't nearly as much of a requirement, as the low speed idle won't be changing the heat mark.
For a forced induction "safe tune". If you are into the bend or the 2nd thread you are too hot from everything I've read and seen. A safe tune is just nipping into the 1st thread and half way down the bend like so. That is a pump gas tune up though. E85 plugs will have almost no coloring, but the heat mark will be the same.
I'll agree to disagree. My plugs sit around the middle of the bend, heat looks good and zero signs of detonation on 20 psi
I'll agree to disagree. My plugs sit around the middle of the bend, heat looks good and zero signs of detonation on 20 psi
If ya put it on a dyno (or watch trap speed) the difference between down in the bend and ¾ down the strap is very little. Yet the chances of detonation in the cylinder are much higher tuned that way. Because you motor hasn’t exploded… doesn’t mean its ideal. But to each his own… it is very well accepted among tuners that into the bend is considered hot for a “safe” forced induction tune up. Don't take my word for it... ask around.
I personally won't tune a 93 car really past 15# for people. It's not just a number but it is generally for me a combination of things.
As said, a Dyno, and full pulls on the street/track are totally different. Holley will help save these instances from happening, or I should say, can.
This is the video I was just watching regarding where the timing mark should be according to Steve Morris.
He states for max power the strap should be clean with the mark right at the bottom of the bend where the strap meets the threads and that's a "safe" spot.
Now Steve doesn't mention whether this is a NA or FI application in the video to be fair.
I'm just fine with leaving power on the table with safe timing, so I'm leaning towards the mark being halfway down the strap (just before the bend) like in @Forcefed86 picture.
Is it possible to read the fuel line without cutting the plug apart?
As with anything performance. Its going to vary. That's def not a typical turbo LS on e85. And if its Steve Morris, chances are its likely some nutty motor with race gas they are trying to eek out TONS of power with. He also routinely runs MASSIVE cams that bleed tons of compression and runs super radical timing. Which will result in a completely different plug. (and also quickly destroy a typical LS) Shouldn't compare your setup to his IMO. 1/2 to 3/4 down the strap is a typical safe street/strip turbo LS tune up.
As with anything performance. Its going to vary. That's def not a typical turbo LS on e85. And if its Steve Morris, chances are its likely some nutty motor with race gas they are trying to eek out TONS of power with. He also routinely runs MASSIVE cams that bleed tons of compression and runs super radical timing. Which will result in a completely different plug. (and also quickly destroy a typical LS) Shouldn't compare your setup to his IMO. 1/2 to 3/4 down the strap is a typical safe street/strip turbo LS tune up.
That was my fear, he didn't stipulate a lot of conditions for why he was saying what he was saying.
Just so I'm crystal clear, when you say 1/2 to 3/4 down the strap, are you starting from the end over the electrode or the end that is attached near the threads.
I'm assuming the prior but what to be very clear for myself and others who may be following along.
Yup. Good rule is keep it rich and retarded. lol. To start with anyway. Make sure the plug reads super safe and make all your major changes. Then add timing in at the end and lean it up a bit.
This is a ***** out "Race" tune IMO for a turbo LS. Heat Line just before the bend and just kissing the 2nd thread. You can see if I were to add timing to this setup to get the mark into the bend... it would be past the 2nd thread. Which is a "no no" in my book. This is also a setup with a bad *** intercooler making 1500ish.
This is the tune up that nipped my ringland in my hot air car on E85.
And the current tuneup that's yet to break anything on the hot air setup. At like boost the tune above went 2 tenths and 1 mph quicker. Not worth the headache IMO.
Last edited by Forcefed86; Nov 18, 2024 at 01:06 PM.
Reason: quicker
Yup. Good rule is keep it rich and retarded. lol. To start with anyway. Make sure the plug reads super safe and make all your major changes. Then add timing in at the end and lean it up a bit.
This is a ***** out "Race" tune IMO for a turbo LS. Heat Line just before the bend and just kissing the 2nd thread. You can see if I were to add timing to this setup to get the mark into the bend... it would be past the 2nd thread. Which is a "no no" in my book. This is also a setup with a bad *** intercooler making 1500ish.
This is the tune up that nipped my ringland in my hot air car on E85.
And the current tuneup that's yet to break anything on the hot air setup. At like boost the tune above went 2 tenths and 1 mph quicker. Not worth the headache IMO.
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