Turbo Boost and FE

[suspendedhatch]

There is no reason why a turbo car can't have the same compression ratio as a stock non-turbo car if you tune it carefully.

I'm willing to bet that you could add a turbo to a N/A engine, keep the stock compression ratio, and tune it with a standalone for a pretty significant gain in both FE and HP.

[DRW]

Originally Posted by suspendedhatch

There is no reason why a turbo car can't have the same compression ratio as a stock non-turbo car if you tune it carefully.

I'm willing to bet that you could add a turbo to a N/A engine, keep the stock compression ratio, and tune it with a standalone for a pretty significant gain in both FE and HP.

I agree. The VW turbo 1.8 and 2.0 have something like 10.2:1 compression from the factory. They work well for getting good power and good FE.

I'm following the same trend with my other DSM. I'm just finishing the rebuild on it and I upped the compression from 8.3 to 9.0 I also have a 1.6 head which has smaller combustion chambers for more compression and slightly more quench area. If I can't run the same ammount of boost on it, I won't be sad since I was able to run over 30 psi (gage stopped at 30).