Quote:
Originally Posted by novaderrik
the beauty of going with a motor with more cubic inches- even if you aren't looking to run 9's or something- is that it will be more drivable in day to day usage due to the extra torque. and a bigger bore almost always makes for a more efficient engine at all engine speeds- which usually translates into better fuel economy.
a fun experiment would be to destroke a 4.1 to 231 ci and see how it compares to a stock 3.8.
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Eactly. The car is much more drivable for a given power level.
I originally went with the 4.1 because I didn't like the way the big turbo spooled on the street. It's a night and day difference now.
If you're doing a rebuild already, it doesn't cost any more money assuming you were going with different pistons anyway. I had mine bored .035" which gave it a 4" bore which means common Chevy pistons and rings can now be used. This gave me a considerable price break. For a street car I wouldn't think of building another 3.8L.
The first 4.1 block I found had cracks around the head bolt holes. The second was perfect and after sonic checking had a minimum .080" wall thickness.
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84 GN. 4.1L girdled with 8.5:1 JEs, 212-212 Comp Cam, GN1s, Ported stock intake, Ford FM IC, 6765DBB, KB headers, Cotton's 3" DP, Innovative Turbo Systems external gate, 60lb injectors, Turbo tweak chip, and a few misc things. No times with new combo yet.
06 Acura TL daily driver.
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