Best not highest boost?

[cummin2pass]

I have the PDR with the stock 12 cm2 and Mach 2. 4's.

I can hit 38 psi quick if I want to.

My question is now I have this boost does it help me or how does it help me. My egt's stay safe. Thanks

 

[NPloysa]

Good question

Good question! My Blue Chip FMS records max EGT, Boost and RPM. My max has been 37. 1 psi, BC FMS Premium, stock injectors, BHAF, straight-piped stock exhaust. I plugged the wastegate. Overreving may be an issue, but I hit that only one with the box full on, usually stays around 30 psi.

 

[Diesel Freak]

optimum is 36 psi, but you are ok...

 

[cummin2pass]

I have a lot of stop and start driving. I keep getting the turbo

bark. I know this can't be good for the turbo.



So what would I be losing if I set the waste gate to bleed off around 25 - 30lb. ?

 

[Bob Wagner]

less air, you need to get a larger turbo

PDR 35 w/ larger housing or dodgezilla will fit the bill for 2. 4's (110HP) injector

 

[cummin2pass]

Good to hear from you BOB. I love the 2. 4's.

Do I need to move to a 14 even if the temps don't get above

1200 ?

 

[dpuckett]

I'm by no means an expert, but my personal experience seems to agree with Diesel Freak- the 12 is just too restrictive for hopped up (even my mildly tuned pickup) engines. I had an 18, and dropped 2mpg when I went to a 12. I'm looking for another 18, as I traded the 18 for the 12, but I have tried everything else- timing, fuelling, injectors- the housing has to be my only culprit left. I'm not sure why this is, but a few others have noticed this as well- go to a bigger housing, and gain MPGs. I have no problems with EGTs either, but it seems to strain at more than 55 mph; I used to go 70 in CO, even with a blown HG!!, and get 20+. I didnt get any real reduction in cruise EGTs- still 550-650 @ 60mph. But I'm doing well to get 18 here.



Daniel