How much power do I give up by not being able to make more than 20lbs of boost? I am happy with the power I have and did not even tapped the wire yet. I am waiting on some fuel system and tranny upgrades for that. I was just wondering how much the difference it would be. Would it help with EGT also?

 

Well, you have a lot more power left in there my friend. Once you tap that wire... Look out!!!

You'll have to watch your EGT's on the higher settings once you tap it. The stock HY-9 will hit like a hammer but fall off when you get up in the rpms.

 

More air should help with EGT's but you probably don't have any EGT problems...do you?

More air will reduce smoke, but it takes more fuel to add power to a diesel engine....period.

Why not add the turnbuckle and test it for yourself. You can always take it off if you don't like the results, but you will need it when you tap the wire, anyway. When I started out (EZ and small injectors) I never ran without the wastegate closed off, so really can't report on before & after. But I never saw excessive boost back then, if that is your concern.

RJ

 

rjohnson, did you ever dyno when you had just the EZ and small injectors?

 

No I don't have any EGT problems now. I think that I may try the turnbuckle.

 

Yes... but a long time ago and would need to check my files.... and mine were DD2's - 75 HP.
I can tell you that for my first 18 months, I always dynoed below what I expected to see. This was before I realized the importance of "all the air you can get". Also, autos tend to do that at lower HP levels.... the first 100 hp +/- added. Mine always drove better than it dynoed.

RJ

 

rohnston, you may notice I am asking a question with a little different slant to it in another post.
Along the lines of more air...How much would changing out the air horn help? I figured the intercooler is the BIG restrictive element in the intake. From a flow perspective it is easy to see how a less restrictive air horn would not hurt, but I struggle seeing how it could lower EGTs given the intercooler is the bigger resistance to air flow .
Don't get me wrong I understand the basics:
More fuel = more power
More fuel with out more air =more smoke
More air = less smoke hence lower EGTs
So, I see the air filter being the best variable in the air equation. It certinally is for Gas engines!

The turbo is the soruce of the power, air, and the contributing factor to heat retention on the exhaust side (abet the rest of the exhaust contributes also).
How much would the Cooleeze elbow help?

 

I don't believe changing Air Horns will make a difference. Smoother flow at the Airhorn will do nothing to smooth out the flow after it. Think about how turbulant the air flows once in the head! JMO.

No experience with Cooleeze, but it makes a lot more sense to me .

RJ

 

I put the turnbuckle on and took it for a test drive. It did not feel like it made more power but the EGT's were lower. I saw boost up to 30lbs w/ the juice on 5 and EGT's not much over 900, before with it on 5 I could get it over 1000 when I got on it hard. I guess I will really see how much it helped when I tow something.

 

Lol, yeah. You know the intake runners on these engines is a straight shot to the valves! Ha! Even with a nice intake like the banks or ats, it still goes into a box, then finds its way into the cylinder.

 

Interesting. I am only running around 20lbs boost.....may be time for a heaver WG spring now that I have the boost fooling of the comp.

 

im making 30 pounds of boost stock turbo with the elbow on it and wire tapped with a comp

 

I was just over 300hp with an EZ and dd2's. That was with the stock hy-9

 

My WG Controller diaphram was leaking so I trashed it and put on a spring.....works OK but as said I can only get about 20lbs of boost.

The concept is a little slow sinking in, but goes like this? Increasing the WG tention (thereby making more exaust go around the turbine) increases the intake charge pressure....so more air = lower EGT.

 

With my current setup, I get a maximum of 36PSI boost. This has really turned the paint on the air-side of the turbo brown. That must be some really toasty air coming out of the turbo. I am running a BHAF.