Twin turbo ls overheating issue

[johnnunez29]

Timing and AFR at idle?

Headers and down pipes wrapped?

Hood opened or closed!

 

[64nailhead]

Is the timing 18 degrees or so at idle?

Have you ran this with the radiator cap on for a heat cycle?

 

[johnnunez29]

Is the timing 18 degrees or so at idle?

Have you ran this with the radiator cap on for a heat cycle?

In the teens . And yes a couple cycles

 

[johnnunez29]

Timing and AFR at idle?

Headers and down pipes wrapped?

Hood opened or closed!

Do you think wrapping the downpipes and headers would help enough???? I am considering doing it of course.

 

[Streetbu]

And you're sure it's overheating? Has your sensor been scaled correctly? Or do you have another in the other head running a mechanical guage?

 

[64nailhead]

Wrapping the pipes will help. But I’m with Shawn, be sure it’s over heating before you get crazy throwing parts at it. Use a heat gun on the pipes. Make sure your rad hoses are getting pressurized (hard). When warming up verify when the t-stat opens via heat gun and gauges. And let it get to 225-230 before shutting it down. You won’t hurt a thing letting it get to high 230’s, but high 220’s is normal operation for some applications.

 

[doood]

man, looks beautiful.

tie the steam line to water pump outlet to radiator.

 

[Streetbu]

I was going to mention that as well. The steam line is not supposed to go into the water pump. I'll poke around for the article and repost here if I can find it.

 

[johnnunez29]

And you're sure it's overheating? Has your sensor been scaled correctly? Or do you have another in the other head running a mechanical guage?

Wrapping the pipes will help. But I’m with Shawn, be sure it’s over heating before you get crazy throwing parts at it. Use a heat gun on the pipes. Make sure your rad hoses are getting pressurized (hard). When warming up verify when the t-stat opens via heat gun and gauges. And let it get to 225-230 before shutting it down. You won’t hurt a thing letting it get to high 230’s, but high 220’s is normal operation for some applications.

Gonna do the tstat and check the pump. Burp the hell out of the system and see what happens

 

[johnnunez29]

I was going to mention that as well. The steam line is not supposed to go into the water pump. I'll poke around for the article and repost here if I can find it.

This system runs like that. Not sure why but that’s instructions per Holley website.