Back pressure test results, when is it too much?
04-26-2012, 11:20 AM
#61
04-26-2012, 11:57 AM
#62
I have what is essentially a 76GTS .96 ar on my 346 and it's donzo at around 18 psi and while I haven't measured the backpressure I'm sure it's gotta be up there. I am trying to figure out what I can do to help get that exhaust out whether it's clipping the exhaust wheel or trying another turbo but since I've got a TTi race kit my space is VERY limited and kind of excludes anything much larger than a 76GTS.
Heck I don't even know why I'm trying to make it faster or whatever, it's not like it techs for what it runs now LOL! I guess I just want to optimize what I have further.
Heck I don't even know why I'm trying to make it faster or whatever, it's not like it techs for what it runs now LOL! I guess I just want to optimize what I have further.
04-26-2012, 12:11 PM
#63
never been on the dyno, just the track twice
at just over 3000lbs it was 149mph on the limiter and 12psi, so whatever that is
i have regeared now and will add boost to see what the turbo does
it would be interesting to get yours to the track and see what the real world power is from the trap/weight
it may be making a good bit more than you think
.
at just over 3000lbs it was 149mph on the limiter and 12psi, so whatever that is
i have regeared now and will add boost to see what the turbo does
it would be interesting to get yours to the track and see what the real world power is from the trap/weight
it may be making a good bit more than you think
.
04-26-2012, 01:36 PM
#65
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Ideally, you want to see 0 backpressure in the DP. Backpressure in the DP would slow spool, limit max boost pressure and create additional pressure ratio in the hot pipe. But that said, backpressure ratio is measured as close to the exh housing as possible (the way the OP did it).
Sorry for going "Steven Hawkins" on ya..
