Originally Posted by
BillyGman
It isn't really gonna matter weather you do 4.10's or 4.30's cuz they're just so close in ratio you're not going to notice any difference in acceleration, and there's only 150 RPM difference at 70 MPH between the two.
People want everything. Gas mileage and a real fast car. But you can't have everything. So some people end up compromising and either get a little of both, or neither one depending on how you look at it.
IMO, if you were concerned about gas mileage, then you should've bought that 4 cylinder economy car that was sitting next to the Marauder in the dealer's show room. You're not gonna have it all. Remember that. But to try and help you out here, I'll tell you that w/the 3.55's, I got 17 MPG city(just like the window sticker said). And w/the 4.10's I got 15 MPG in the city. Now w/the 4.56's I get 13.5 MPG in the city, but I also have the fastest N/A Marauder on this board. I'm reving at 2700 RPM's at 70 MPH in O/D. To me that's no big deal. I can still bring the car up to 100 MPH in a heartbeat, and you'll see by my signature that I have the fastest trap speed on the board of any N/A Marauder too. Sometimes I still bring her up to 120 MPH because she can still do that w/the 4.56's, but it's rare that I do that. You don't need to dothat to have fun w/this car.
Case & point, you can't have everything. These are big heavy cars, and changing from 3.55's to 4.10's will make a small difference in acceleration as long as you chip it also.If you don't chip it, then forget it. Because it will NOT make any difference at all(been there done that). But even w/the chip, it isn't gonna be a night and day difference. It will mean a .50 sec reduction in your ET at the track. But a half second reduction in the quarter isn't going to feel like a major difference when you jump in your car and drive down your street, unless you get into a race w/that guy that you came close to beating a couple weeks before that. Because now you'll either keep up w/him, or beat him by a car length. The one thing that I'll say is for certain is that if you ever think that you'll supercharge the car, then don't put the 4.56's in, because you probably won't be able to use all the power off of the line anyway if you do. But then again, I wonder if nyone can really use all the off-the-line acceleration w/the 4.10's when they supercharge their car.
So it depends what your priorities are, and what exactly you want thecar to do. For instance, if you want the car to burn rubber from a dead punch well into second gear, then you'll have to get the 4.56's, stallion torque converter set at a stall speed of 3,000 RPM's, and the Kooks headers along w/their complete exhaust. That's what I did. But I don't know what you're looking to accomplish w/your car, so that was just an example. But just remember, you can't have it all. It's either one thing, or the other w/a car this heavy.
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but they were in a suburban or something like that. I didn realize its 55 there, they clocked me at 80. $70 ticket only though, so i was kinda glad, now i REALLY watch myself in that area. Just last visit a guy was doing about 90 there, a few seconds later he had company and was pulled over. I learned my lesson!!! 
