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Discussion Starter · #1 ·
Been doing some digging around and have yet to find the answer I'm looking for. There is info for days on the HPT 2.3 engines, but what did they change in the 2.4 for when they did the LPT version? I'm sure they didn't just slap a turbo on it and change the tune.
 

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Discussion Starter · #2 ·
Derp. Now I find it.

Engine Information:
There are four different engine variants used in the 800 series:
Variant 1: 2.4L inline 5 168 SAE net hp, 162 SAE net ft./lbs. – 5-speed manual/4-speed automatic
Variant 2: 2.4L inline 5 turbo, 190 SAE net hp, 197 SAE net ft./lbs. – 4-speed automatic
Variant 3: 2.3L inline 5 turbo, 222 SAE net hp, 221 SAE net ft./lbs. – 4-speed automatic
Variant 4: 2.3L inline 5 turbo, 240 SAE net hp, 221 SAE net ft./lbs. – 4-speed automatic (The only difference from variant 3 is more boost, all hardware is the same)

compression ratio's
Variant 1 (N/A): 10.5:1
Variant 2 (LPT): 9.0:1
Variant 3/4 (HPT): 8.5:1
 

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i dont think the 2.4 has sodium filled exhaust valves like the hpts do.
 

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Out of curiosity, all the four versions have the same engine block, right? Do the heads differ or couldn't you just slap on the larger turbo and the ECU and basically have R-performance? Or turbo+remap if that's needed if you have the 2.5 (not 2.4 l) instead of 2.3. Because the 800-series are too old to have VIN-locked ECUs or anything, I think...?
 
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