Does 1lb of boost equal 10h.p.????

[Dfeland]

Anyone ever heard this? If boost goes up 1psi than h. p. goes up 10 horsepower. So if I have a 160 hp CTD with 13psi and Raise boost to 18psi that will add 50hp??? Anyone concure with this??

 

[scott4glamis]

defeland i too have heard this is an aproximation of horse power .

@ 1 psi is roughly equal to 10 horse power, some where i heard it , just cant remember where. any one else ?

 

[Joseph Donnelly]

Depends greatly on the configuration, turbo size, etc. for example, with the HX35, Sickly made about 40 psi at 400 hp using the 18. 5 cm2 housing. Boost would have been much higher with a smaller housing. Recently made 565 with 36 psi with a different turbo, and made 609 with 43 psi with yet another, a HX55.

 

[rdodd]

I read that the rule 1 lb boost=10 hp is most accurate when running the 16 housing. The article said the 16 cm housing was the perfect housing for our engines. I believe it was written by Bruice Mallison from Pittsburg diesel injection

 

[Jet Tech]

I first read the 1 psi equals 10 hp rule from Smokey Yunick (may he rest in peace). Smokey knows! He was an amazing researcher.



Interestingly enough I met his daughter at PRI (performance/racing industries) trade show in Indianapolis in December. They are selling some great books about his life.

 

[amsoilman]

In conversing with some Cummins rep's several years back, they said the exact thing. Every pound of boost produces about 10 HP. So when I first installed a gauge on my 91 1/2, I installed a boost gauge, and sure enough, I had a max of 16 PSI. The engine was rated at 160 HP. My 94 has some upgrades, and I have had it on a dyno that said I was producing about 300 HP... ... . yep, the boost gauge reads 30 PSI max. So I thnk this is a pretty good rule of thumb. BTW, I do have the stock turbo.



Wayne

amsoilman