Benefits Of A 4.10 Swap/Lidio Tune?

I've had a DOHC before - not a Marauder - so I'm totally on board for the 4.10s, but why the tune? Is it to correct the speedo?
 
Stock 3.55s.

The tune is to correct the speedo, but more importantly to add more power and change shift points.
 
Melon said:
I've had a DOHC before - not a Marauder - so I'm totally on board for the 4.10s, but why the tune? Is it to correct the speedo?
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Tune will correct speedo, but will also add 20-25 hp and improve the shift schedule. The factory shifting is designed for economy, getting into overdrive quickly. Marauder is a 4200 lb car..and need to get it into the best powerband quickly. DOHC are not low end torque monsters, so getting it up and out will only improve fun driveability
 
Gigan said:
I've hit 140, confirmed with GPS, with my 4.10s.
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guess ill be getting some stuff looked at then

sorry for the attempted hijacking :P :P




first buy a tuner from Mo's and get both a 3.55 and 4.10 gear tune, then save up till you have enough for the gears AND install, then when you have them put in, just whip out your tuner and load the 4.10 tune and there you go
 
The 4.10s would help getting the engine into the power band and a JMod helps with shifting. Is the factory tune that bad? I'm just curious how a tune will add that much hp. Not trying to sound ignorant :)
 
The stock tune shifts into OD at 36 mph, my zack tune shifts into OD at 47mph under light acceleration. Helps keeping your car in the powerband. Also the timing is advanced throughout. Short story, yes the stock tune is pretty bad.
 
I went around the Atlanta Raceway and averaged 125 mph on the back stretches and did it for 20 laps and had no problem with the 4.10's or my drive shaft.
 
whitey said:
The stock tune shifts into OD at 36 mph, my zack tune shifts into OD at 47mph under light acceleration. Helps keeping your car in the powerband. Also the timing is advanced throughout. Short story, yes the stock tune is pretty bad.
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Enough said :) and if I'd get a tune to correct the speedo for gears, I may as well just have everything else. I still need to get my Marauder first :) (and talk my wife into it)
 
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