Dieselcamper

I am getting my OFE clutch installed next week , then
am looking to stack a TST PM3 with my other mods. PM3
will just be set on 5 or 6 since I still have the stock turbo.

HOHN

NOt likely. Figure that an HO is about 225hp at the tires bone stock.

Then add the 90hp that a TST gives to the HOs smaller pump, and your right at 315hp.

Now, add some 100hp sticks, and you'll be right around 375hp on an HO with a TST and 100hp sticks.

Sorry to be pessimistic, but the number don't just add up so conveniently as we'd all like them to. If they did, I'd have 225+150+60= 435hp, and I probably have just under 400 with the stock turbo.

jh

bmoeller

Won't be able to run a stock turbo @375hp. WAY to hot.

HOHN

I running more than that with the stock turbo.

It depends on usage. For just putzing in town, the stocker can handle over 400 pretty easily.


For towing, keep it under 350 or so.

jh

Bart Timothy

You'll need bigger injectors to get there and your stock turbo will be ok. If you've haven't got the TST yet, go for larger injectors instead. ETHs don't like fueling boxes as well as bigger injectors.

Dieselcamper

I have RV275 injectors right, wish I would have gone
with the Mach 1.6 injectors. The reason I want to go
with the PM3 instead of bigger injectors , is I want to be
able to "turn off" the fueling when towing in the mountains.
Once you have larger injectors , they are "on" all the time
and can't be "turned off"

TxDiesel007

Way too hott

at 350 rwhp... air is definately a big power adder, and if u dont have it, a power killer...

Rick

Dieselcamper

Great I just got my OFE clutch on Friday rated for
450 HP , and now I find out I won't be over 325 HP with my
mods

bmoeller

Don't get mad. Means you have room for more later.

mr T

u need more than 325? i have 160hp and i smile daily....at least u have a clutch that u could have some fun with and do some decent launches with your power

JDGnut

That's the nice thing about a VP powered truck... just turn it down when you need to tow.. turn it up when you need to play.. watch the EGT's... Yea.. its going to get a little warm... just don't stay there all day long...

I think the 100hp injectors are the best for many applications.. that still want to tow.. (with an adjustable box.. ) No matter what brand injectors..

Ph4tty

Its good to have more clutch than you need.
Better to have and not to need than to need and not to have

HOHN

Sometimes, but not necessarily. Member RustyJC has 347rwhp and tows a HUGE 5er that puts him right at MAX GCVWR. He has no EGT problems, running a max of 32-34psi of boost, if I remember.


And air does NOT add power. You can't burn air. Air is a powerenabler. Fuel is power- but only with O2 to burn it.

A shortage of air won't necessarily show up as low power-- but definitely as high EGT.

For example, witness the HUGE smoking pulling and racing trucks. Definitely short of air-- but NOT power. If air was such a huge power adder, why would the allow themselves to be so overfueled?

The only time air is a power adder is when you are so ridiculously overfueled that you would get LOWER EGT from more fuel-- in other words, you're "putting the fire out".

UP to that point, though, FUEL is power, and air is EGT control.


jh

paulb

Air has other effects on combustion, other then just complete combustion and EGT control. If there is more "free" air available during combustion, complete combustion can take place much faster. This in effect advances the timing. It doesn't have an effect of when the combustion starts, but it does effect when it ends. With a large single turbo, I dyno'd 510hp. I added twins and the power went to 565 with the same amount of fuel. This was when I was still running Mach 4's. I was not overfueled with the Mach 4's. Look at any of the videos taken of me racing last year.

Remember on the p-pump pulling trucks they can adjust timing...

Paul

rharveysr

Here is one for ya....

2001 2500
ATS automatic
TST Powermax3
F1 Mach 2.5
PDR HX35/14
Smarty

dyno run 497/1033

Yes things got a little warm but running down the road on level 3...temps stayed down.

Rick