My From Start to Finish 6.0L Build

[RAMurphy]

@Rocket Man - I read a couple of posts, after the fact (lesson learned), on this particular "whistling" issue. One member actually had a code for a vacuum link that made troubleshooting difficult. I do not have a vacuum leak and when I place my finger over the IAS port - the engine will stumble and the noise goes away. I also tried adjusting the throttle plate, the "whistling" (yes - it is an actual whistle sound not a suction sound) will diminish slightly but is still there and again gets louder with slight throttle increase. I'm pretty thorough in my troubleshooting. Like I found out - known issue with this TB. My new throttle body will arrive tomorrow, so we will see if that corrects the problem. I also ordered the 4 bolt to 3 bolt adapter plate for troubleshooting purposes. As you know, this upgrade was for my 6.0L build but I wanted to test it out on my 5.3L. Good to get some of the issues worked out before my final project.

 

[iamdub]

@Rocket Man - I read a couple of posts, after the fact (lesson learned), on this particular "whistling" issue. One member actually had a code for a vacuum link that made troubleshooting difficult. I do not have a vacuum leak and when I place my finger over the IAS port - the engine will stumble and the noise goes away. I also tried adjusting the throttle plate, the "whistling" (yes - it is an actual whistle sound not a suction sound) will diminish slightly but is still there and again gets louder with slight throttle increase. I'm pretty thorough in my troubleshooting. Like I found out - known issue with this TB. My new throttle body will arrive tomorrow, so we will see if that corrects the problem. I also ordered the 4 bolt to 3 bolt adapter plate for troubleshooting purposes. As you know, this upgrade was for my 6.0L build but I wanted to test it out on my 5.3L. Good to get some of the issues worked out before my final project.

Can the port be modified? Like maybe file a chamfer around it? It's been a long time since I've looked into a cable TB.

This reminds me that I have an 80mm BBK in the garage. Maybe I'll make an exhaust cutout with it.

 

[RAMurphy]

Can the port be modified? Like maybe file a chamfer around it? It's been a long time since I've looked into a cable TB.

This reminds me that I have an 80mm BBK in the garage. Maybe I'll make an exhaust cutout with it.

When I was talking to a Jared from Texas Speed, he clearly stated that they were completely aware of the issue with the Holley TB, although I purchased it from Summit, he was so helpful and knowledgeable on possible solutions. Summit was not, even though I have been an active customer for years. I did try modifying and porting - which helped a bit, but was not the solution. So, I purchased a TB that he recommended. A bit more expensive, but he stated they have had no issues with this TB. Should arrive tomorrow. Looking forward to installing it - so tired of that aggravating whistle.

 

[George B]

The TB on the 2003 Burb I had whistled too. Only at light throttle.

 

[RAMurphy]

The TB on the 2003 Burb I had whistled too. Only at light throttle.

This whistle is loud. About 40 seconds into this video is exactly what I hear when I first start up. It will quiet down after it warms up but comes back under light throttle.

 

[George B]

This whistle is loud. About 40 seconds into this video is exactly what I hear when I first start up. It will quiet down after it warms up but comes back under light throttle.

Holy crap. Mine wasn’t that loud!

 

[Rocket Man]

That sounds terrible. Amazing that Holley didn’t address this and come up with a solution.

 

[RAMurphy]

That sounds terrible. Amazing that Holley didn’t address this and come up with a solution.

You and me both. Now to be fair, with my intake on it is not quite that loud. But you can still hear it in the driver's seat.

 

[RAMurphy]

Verified my new throttle body will be delivered today. Looking forward to getting it installed.

 

[RAMurphy]

Just got an email from Texas Speed - my rotating assembly has been shipped.