Phantom

iTrader: (16)

Why are my 4.56s not going to be good for another turbo setup. I'm not looking for because people on the Internet say so answers but actual good info.

If I go back to boost it will be a rear mount with circle d tb stall, 4.56 gears with a 28" slick

00ChevyScott

iTrader: (10)

A taller gear puts more load on the turbo. I'm sure someone else will chime in soon with a lot more detail.

BlackGMC

iTrader: (31)

I believe it is because you blow threw the powerband tooo quickly and it does not build boost like a lower gear does... For example, 1st gear max would be 5psi, 2nd gear 7psi, 3rd 10psi... I believe it does that because a Turbo build boost based on the load put on the engine... Those are just made up numbers but you kinda get the point. I maybe completely wrong....

2005 Silverado

iTrader: (19)

I think is more to do with loading the turbo. Im pretty sure a gear like 3.23 will load a turbo faster then a 4.56.

Also you might get in touch with vanillagorilla (spelling) i think hes running like a 3.08 gear.

Phantom

iTrader: (16)

If I do switch I won't run anything less than 3.73.

I know the more load you put on the engine the more boost you can build, but with these heavy trucks there has to be a balance/compromise. Alot of guys I see with taller gears are cutting crappy 60's unless they have a loose converter where they can build boost on the line. But then it seems they are disappointed in their et's possibly because of blowing through the converter once they reach high boost?

So my thinking is(and I'm sure I'm wrong) keep my 4.56s and 3000 stall, keep my 60's the same and just letting the turbo do whatever work it wants to do. Or is the problem not going to get a chance to work?

2005 Silverado

iTrader: (19)

I agree with your concept...there is always a 2 step to help the boost initially, it might not spool right away in first and second but off the line with step it will

BlackGMC

iTrader: (31)

I think you need to ask yourself, do you want a track truck or a street truck... Because if you goto the track maybe once a year, then what is the point of building a setup that can build boost on the line?

Phantom

iTrader: (16)

Absolutely. I do plan to do some index racing next year but building boost on the line isn't necessarily important for that. I just don't want to go through the trouble of building it if it's not going to make atleast 10# of boost by say 4000-4500 in 2nd gear

BlackGMC

iTrader: (31)

get a beast of a TC and lock it up at WOT, that should help it build MUCHO BOOSTO in 2nd...

Phantom

iTrader: (16)

Lol yeah a custom built converter would be ideal and great but not what I want to do at this point.