most boost on pump gas with stock heads?

[cvcsmkr]

what is the most boost you guys are running with a good tune on pump gas?
and also what kind of afrs, timing and iat's do you see?
preferably 93 oct.
thanks in advance

 

[SeattleSy#1255]

Re: most boost on pump gas?

Re: most boost on pump gas?

stock motor or built?

 

[Bill Z]

Re: most boost on pump gas?

Re: most boost on pump gas?

I have boosted 18.5 pounds on a stock motor with a stock turbo running the Ultimate chip with 3 bar MAP in the winter.

Performance sucks somewhat in the summer.

 

[QUICK STORM]

Re: most boost on pump gas?

Re: most boost on pump gas?

i'd run safe boost like 12-14#, but i have run 18 before on pump gas. i think you should invest in alky my friend.

 

[Maverick87]

Re: most boost on pump gas?

Re: most boost on pump gas?

pump gas 17-18 add alki 28psi stock motor and pt61

 

[cvcsmkr]

Re: most boost on pump gas?

Re: most boost on pump gas?

this is great!
please keep em coming.

 

[turbodig]

Re: most boost on pump gas?

Re: most boost on pump gas?

this is great!
please keep em coming.

"Pump Gas" Varies wildly. NE Pump gas != Florida Pump gas != Colorado Pump Gas, etc.

Refiners formulate gas for local laws, so your quality will vary much.

Bottom line, you pretty much have to start low (like 12 psi) and work your way up on the gas you plan to use. As soon as you start to get a bit of knock, back down a psi or two.

 

[TurboJunk]

Re: most boost on pump gas?

Re: most boost on pump gas?

ive run 20 psi on pump. stock turbo, stock motor, ultimate/3bar. stock timing. NO KNOCK
the motor didnt really pick up a BIG gain because it was down on timing. i never tired it with more timing. other issues cause the motor to fail (bad oil pump)

 

[SeattleSy#1255]

Re: most boost on pump gas?

Re: most boost on pump gas?

20 psi, stock motor, no knock, pte51

 

[UR50SLO]

Re: most boost on pump gas?

Re: most boost on pump gas?

18psi everything stock but chip and intercooler MSD Ignition & exhaust.
I'll know more once we take it to the nationals and get some help with Autoprom and Tuner Pro.
11.7-11.5 AFR @ WOT
We have 95 on the pump here. We'll run good gas at the nats to tune with so we won't hurt the motor.
~Scott

 

[Try Me]

Re: most boost on pump gas?

Re: most boost on pump gas?

my truck is setup to make 20lbs. im running 93 octane. like 23 or 24 degrees of advance, injectors not quite maxed out, and afr is around 11.9 to 12.0 to 1

 

[cvcsmkr]

Re: most boost on pump gas?

Re: most boost on pump gas?

my truck is setup to make 20lbs. im running 93 octane. like 23 or 24 degrees of advance, injectors not quite maxed out, and afr is around 11.9 to 12.0 to 1

stock heads?

 

[Try Me]

Re: most boost on pump gas?

Re: most boost on pump gas?

no, stock nothing pretty much