B1-02-04W Turbo

[AllGoodHaywood]

How much psi can this push and still be benificial to HP? Mine is set to 40 psi, how do you adjust the wastegate higher if I can eeak some more HP?

 

[jwilliams3]

40-45psi max.



Your turbo wheel sizes are your limiting factor more than your boost.

 

[BIG BOB]

You should check your "drive pressure" before you raise your boost any more. Raising you boost without check the drive pressure may cost you HP and add heat.

 

[WUnderwood]

how do you check your drive pressure?

 

[jwilliams3]

Checking your drive pressure is only going to tell you that you are in check at a certain amount of boost.



From what it sounds like you are just wanting to squeeze some more power out of that turbo.

But the size of that turbo is what is limiting your power not your boost, because you are about maxed out with usable boost/power ratio already with that charger.



I would strongly suggest you look into a turbo like a Super Phat shaft 64 or 66. A charger like that would increase greatly the amount of air you can move through that engine.



I used to run the B1-02 with a 12cm turbine housing and switching to a Super Phat Shaft 66 was a night and day difference.

With a bigger charger you will not only see a boost increase but more power at the same boost levels.

 

[Fred Swanson]

And a pig off the line too. The heat here will kill it with a 66. Greg, you know the answer, time to hang a B2 off of that B1.

 

[jwilliams3]

You could also consider the SPS62 or a PS64.



Twins are always nice... .

 

[BIG BOB]

Thought I would share my experience with my B1-2-04. You can see my mods in my signature.



I was only about 40#'s of boost, very similar to AllGoodHaywood, I had the Edge boost elbow installed on my B1. I asked Lenny at DynoMite Diesel Performance about raising the boost, he asked me if I had ever checked the drive pressure. (Keep in mind that an 1:1 ratio between drive pressure and boost is recommended. ) I had never check it and told him so, I let the truck with him to check the drive pressure. When I returned he asked if I had the stock elbow for the turbo, I asked why, he said that my drive pressure was extremely high and I could damage the turbo if I continued to run that high of pressure. It was 65+ and my boost was 40. He explained how I was over driving the turbo and causing excess heat while robbing HP. When I got home I put the stock elbow back in, and my drive pressures went down to 52 and boost stayed at 39-40. Still high but alot better than it was. Lenny told me for every day driving it would be fine, but if I was going to drag race or pull that I should consider having the turbo modified to reduce the drive pressure.



Being that I am not competing I haven't modified the turbo.



Just thought someone might be interested.