What Holley power valve is this?? - 1999 3.0

[roadslug]

Hi Guys,

I went through my carb with the holley rebuild kit from summit that includes a new power valve. I'm having some issues at part throttle ~2000-2800. When I hit cruise around 3200 it's fine so I have some transition fueling issues. The PV in my chevelle are clearly labeled 3 on one side and 0 on the other. 3.0. The one out of this carb has an 8 2 5 and A. Take a look

 

[Maclin]

Re: What Holley power valve is this?? - 1999 3.0

Are there any numbers stamped on the edges?

My guess would be 2.5 but that one has one more number than I remember seeing. The ones I remember always had it stamped on the edge too.

What did the kit come with, how is it marked?

 

[Maclin]

Re: What Holley power valve is this?? - 1999 3.0

Seems like one set of markings on that plate was the month and year and the other set was the rating. The way the 2 and 5 are situated closer to each other makes me lean even more to the 2.5.

Some power valves had 2 stages, but they had an odd configuration on the plunger on the other side, longer I think.

 

[skydiveD30571]

Re: What Holley power valve is this?? - 1999 3.0

Yea Maclin that's a 2.5 power valve. While holding the Holley pv upright, it's the 2 right-side numbers from top to bottom. So 2 and 5 = 2.5.

 

[Don S]

Re: What Holley power valve is this?? - 1999 3.0

Yea Maclin that's a 2.5 power valve. While holding the Holley pv upright, it's the 2 right-side numbers from top to bottom. So 2 and 5 = 2.5.

Yes, you hold it like this to read it.

 

[roadslug]

Re: What Holley power valve is this?? - 1999 3.0

Great. Thanks Guys. The ones I deal with on my car always have a number on the far left and one on the far right. I'm going to take it out and see where I'm cruising at vac wise. I'll then order a replacement at 2.5, I have a spare 3.0 from the chevelle and I'll order whatever I get from the cruise.

What is they typical rule of thumb on the boat. 1" less than cruise? Thanks!