145° or 155°

[cut7]

All other things being equal, is there any power difference (at the street level) between 145° and 155° injectors? Yes, I know you have to have pistons to match the injectors, but I have to rebuild my motor anyways. And there doesn't seem to be much of a price difference between the two different pistons.

 

[95cummins5.9]

Just run the wide bowl and you can run either injector.

 

[cut7]

Yes I'm aware of that, however that doesn't really answer my question.

 

[jasonc]

My experience has been 155's have made more power, even on stock pistons. 145 would run and idle cleaner.

 

[Nascar]

My experience has been 155's have made more power, even on stock pistons. 145 would run and idle cleaner.

What he said.

 

[cut7]

My experience has been 155's have made more power, even on stock pistons. 145 would run and idle cleaner.

How much more? And I must say, this is a street truck, idle & low-end are very important.

 

[Smitty256]

If idle and low end are that important, no doubt a 145*

 

[jasonc]

How much more? And I must say, this is a street truck, idle & low-end are very important.

Personally I didn't think it was that bad, mostly when it was cold. I went from a set of honed out 370's to a pair of 145 5/14's, truck ran good but definitely was a loss of power. Went back to a set of 155's.

 

[jimbo486]

Having the larger, 155* piston bowls from the factory (non-intercooled engine), my engine runs very clean at idle and in the low end with honed 370s. Speaking from the VE side of things, majority of the time, they like a bump in the static/base timing to help clean up the idle haze, if any. My pump is custom but the static timing is set to factory and has no haze at idle.