Ok of course I am like everyone else.... I have a supercharged H2 that I thought would be fine, well now I want a little more. The only mods besides sc are shorties, cat back, electric fans, cia, and nelson tuning.
Now for the questions:
I am at 6# , what can I go to without being to much ( I do some light towing)
How much would 90mm help out?
High flow cats?
Torque coverter?

Or any other suggestions?

Thanks alot,
Tim

 

What blower are you running? What are your goals? The H2 does not lend itself well to alot of boost, some of the supporting driveline will not like the added power.....for long.

 

Running Moregrip's old 112. I don't need it to be a 12 second truck but wouldn't mind a little more than what I have. Kinda was figuring all the little things without having to redo the engine yet.

Thanks,
Tim

 

you can pulley it down a step, but much more than that you will need a custom tune.

 

Well I don't mind having Nelson retune for whatever. What pulley size should I try? I will have to check and see what I have on it now, but I get 6# max.

Thanks,
Tim

 

it had a 3.1 on it when I shipped it out stock from Magnuson.

 

3.0 would be the smallest I would run on that heavy truck.....and get a "in person" tune please.

 

Put a cam, exhaust and a 2600-2800 tq in. Just make sure to add a bigger trans cooler.

 

Prepare for transmission work now. You have a 4L65E and it won't like much more than the next pulley you'll install. The good news is a shift kit and the billet servo's will get you by down to a 2.9 pulley. Also ask your transmission builder about the vacuum modulator kit for your transmission. It's a life saver and allowed me to run down to 13.86 in my H2.

You don't have to sweat any other parts of the driveline unless you go with a lot more power than the Radix can make. Even a 2.75 pulley won't hurt anything other than the stock transmission.

I expect to retain my fully built 4L65E down to mid 13's... we'll see what happens.

You will need a good tuner as well. You might find you need injectors if you go below a 2.9 as well. I did.

 

Thanks everyone. Atleast I have a good idea now. With the 3.0 pulley, will the throttle body change help at all?

Thanks,
Tim