Bextreme04
Full Access Member
- Joined
- May 13, 2019
- Posts
- 4,428
- Reaction score
- 5,541
- Location
- Oregon
- First Name
- Eric
- Truck Year
- 1980
- Truck Model
- K25
- Engine Size
- 350-4bbl
Is this an automatic or manual trans? It must be a pretty aggressive cam to have vacuum that low, which means it isn't going to like having a low stall converter or to be in lower RPM ranges. If you have an automatic and still using the stock converter, I would expect it to pull against the converter pretty hard at idle in gear and the cam will really want the converter stall to be 2400rpm or higher. You might also just be getting lower vacuum from poor mixture as well. You probably need to do some idle mixture tuning and maybe re-jetting.Ricko, not seeing this kit available anywhere - it's sold out or not available. Any other suggestions or just get a lighter spring kit?
Went back and adjusted total timing to 36 degrees at 3000 rpm instead of 3800 and it's more responsive but still feels sluggish to about 1800-2000 RPM, then it kicks in.