Just curious as to how much better my car would be , a tj s2 ralliart, with a 6g75 motor in it its pretty good now just something to mull over in the future.

Just any thoughts would be appreciated.

Non original motor will devalue the ralliart of course, but it will perform better with a 6g75.

The 75 will get around 160kw @ wheels, original ralliart I don't know 145-150???
Over the quarter maybe an extra few tenths, maybe even half second, and 75 a bit more low down torque.


Of course the 75 will run a bit better with a custom tune, I ran my 75 with a ralliart tune for a while and was a little bit off in parts, particularly lower revs.(this adds to your costs)

Then if you customise a 75 inlet manifold a few more kw's again. More costs but a worthwhile one (4-5 kw).


For the dollars spent (plus losing the original engine from a rare car), maybe you are better off optimising the ralliart engine?
Don't know if anyone has tried the 75 inlet manifold along with a custom tune on a ralliart engine, but perhaps that could add 5-8kw?

Then Keep the standard gear if you ever want to revert to ralliart specs, or to include for sale of car.

Have done this a few times and in every case the customers have been happy