02’ Silverado single cab, 4700lbs, 20” wheels, 5.3l LM7, E85, Forged Internals, Cam-223/240 113 .590/.615, Built 4L80, Hughes 3000 stall, 3.73 rear end, Procharger D1X at about 20psi. Having a bitch of a time getting out of the hole. Seeing nothing better than a 2.0 sixty foot. The Procharger according to the data log really wants to kick in at about 4K rpm’s but it’s taking the truck over two seconds just to get there. For a 3000 stall, I don’t see any flash to that level at all just a gradual run through the rpm’s. I talked with Hughes and they did recommend a loser converter but I wanted to ask you guys how lose I should go? I still want it to be somewhat street frendly but with all the power I have I would also like to see at least a 1.7 or 1.6 sixty foot. Any help would be greatly appreciated.

 

Give the guys at Circle D a call. They should be able to get you dialed.

 

I second Circle D

 

Sounds like Circle D is the go to. My only problem is that Hughes will do one change for free. I mean I guess that’s not a problem but to switch brands right now to Circle D will see me out of pocket a thousand dollars or more. I’m relatively knew to all this and now after that fact it seems like everyone on here loves Circle D. Should have went with them first.

 

I would buy a circle D and put your Hughes up for sale and use the free restall from Hughes to to dial it in for whoever buys it.

 

Where is it flashing at now?

Your weight, rear gear and tire are fighting against you. I'd go with their recommendation 1st instead of switching brands. A 3000 stall in my H2 will be completely different than in your truck.

Tim

 

Tim it’s not really flashing at all. Maybe up to 2000 but it really just looks like a steady rise of the rpm gauge. I agree with you, at this point I’m probably going to have to stick with Hughes as they said they would build it so that it flashes to 4K and that’s at least where I need it to be.

 

That sounds like a stock stall speed . I don't see how they could be more than 1000 rpm off on their estimate, unless they thought that you are making 20 psi boost at 2000 rpm. If they recommended the converter that you have based on everything that you said in the 1st post, you should switch brands. If you picked it out yourself from a catalog without consultation from Hughes, then take them up on their offer to restall it.

 

Great points, yes they chose it for me. I don’t think I’m even into any boost at 2000 rpm’s. Maybe I could sell the Hughes Converter online. It would be a great converter for a Whipple where the torque and power are immediate and it’s built for power. Just talked with Circle D. They recommended the 258mm converter with a 3700 stall. $1320, now I have decisions to make.

 

Whats the tune look like. No timing down low will make zero torque to get the converter to flash.