How much low end boost?

Chuckanut245

Registered User
Joined
Jul 30, 2021
Posts
6
Reaction score
0
Location
California
Hey guys I’m thinking of turboing my 6.2. I’m going to be lowering the compression to 18:1 but I heard somewhere from somebody that the 6.2 and 6.5s don’t like low end boost because they might blow up due to the bore and stroke of the engine. Is this true? Also sense it will be 18:1 compression wouldn’t that help the issue?
 

u2slow

bilge rat
Joined
May 8, 2007
Posts
1,419
Reaction score
493
Location
PNW
Low-end boost is difficult to tune for with the stanadyne pump. It's not a Bosch with an AFC device.

You basically have to size the turbo for the top rpm/fuel-rate and get-what-you-get on the lower end. A wastegated turbo does help some, but what you gain in responsiveness is a burden at high load for egts.

As for cylinder pressures, the 6.2 can't handle what the 6.9/7.3 or other direct-injection diesels can. It's just not that beefy.
 
Last edited:
Top