Introducing Piers Nasty Nine HY 35 turbo...

[24V-DSL]

D.F. and Greg.....

Just turned over 4K fun miles with my Nasty Nine... .



1. When I stomp on it from dead stop/idle I do get some smoke, but it isn't very black... . more hazy charcoal, and a plume maybe the size of my tailgate, which is gone as soon as I have boost. Approx. half the smoke than before which was pretty black. 'umember, I've got dd2's here, so I expect some. If I've got 2-3 lbs. boost and hammer it there is a very slight haze. If I've got ~7+ there is no smoke at all.



2. 1/2 truck length before boost hits is pretty accurate. The needle just flat jumps to 26-27 if I hammer it with ~4-6 lbs. Cruising at 60 (600 egt. and 10 lbs. boost) push the throttle and the boost jump is instant. The throttle response is excellent... . cruising around with O/D off any little blip of the pedal gives instant response.



I'm aware some are thinking my boost max. is "puny", but Piers set this up and says as long as I've got a clean pipe and good egt's no need to mess with it. After the install and road test I asked Piers why don't we go for 30-32 lbs. , and he just said... why? I'm not about to argue with Piers. No offense intended, Greg.



Egt's are as first reported. Can't get over 1050 pre-turbo... . might have seen an 1100 the other day, but no more than that.



Greg, if you've got a comp. and are going to bigger injectors from your DD1's you should talk to Piers about whether the Nasty is a good fit for you.



Hope this helps... .



Edit... . EZ is set on most aggressive.

 

[Diesel Freak]

Thanks for the report. Lower COOL boost is always better than high HOT boost

 

[Big White Beast]

I still believe.......

That more air is better for the cummins, hot or not. That would strictly be in reference to power. The hotter air probably makes the most difference in what temps the IAT is sensing. CCahil that might be part of your mileage problem. Since switching to the PDR HX-35 I have noticed a slight increase in my mileage.



Of course I believe my right foot does the most damage to my mileage though. My fiancee said her mileage on the 2002 dropped a 1/2 MPG after I drove the truck most of the weekend.



Garrett

 

[Lsfarm]

Boost and Egt's

24-DSL Thanks for the report. The 'Nasty Nine' sounds like it may be good for about 100* drop in temps. I get similar EGT's to yours when I'm running the Comp on 1/5, [EZ Setting] with a BHAF.



My plan is to run some more baseline runs on the local stretch of the freeway with a given load and at a repeatable ambient temperature. To have some valid results I need to compare 'apples to apples'



24-DSL what air filter/filter box were you running during the original run up Pier's test hill?



Diesel Freak: I agree that cooler air should drop the EGT's, but when making back to back runs with the same load, same day, same temps, same Comp settings, I found that at least up to about 39-40 psi I still had cooler EGT's than with the boost at 32psi. Theory and practice doesn't always jive.

What I don't like is the the rpm's I'm probably pushing the turbo up to!!



Big White Beast, More air=lower EGT's in my experience too. Maybe this will change when the weather warms up into the 90's ??



Colin: While running your truck on the lower settings of your fueling box I'm sure you won't generate high EGT's. This is just differences in driving styles. If you took an 'Impatience Pill' and cranked up the box, I'm sure you would see much higher temps.



Can't wait to get my new turbo and BD3's installed!!



JMO's and Experiences

 

[24V-DSL]

The Piers hill run was with a K&N RE-0880 and pre-filter 25-0880.



I do think that the ATS manifold and AFE Mega-Cannon are contributing something in this mix. The AFE didn't go on until ~750 miles after returning from Piers.

 

[Diesel Freak]

Re: Boost and Egt's

Originally posted by Lsfarm

Diesel Freak: I agree that cooler air should drop the EGT's, but when making back to back runs with the same load, same day, same temps, same Comp settings, I found that at least up to about 39-40 psi I still had cooler EGT's than with the boost at 32psi. Theory and practice doesn't always jive.

What I don't like is the the rpm's I'm probably pushing the turbo up to!!

The reason it works is because of that huge black intercooler. if you put on a turbo that could generate 40psi of "cooler" boost... then you will see an even greater reduction in EGT.



Twins with an interstage cooler would be sweeeet

 

[ynot]

Staged Cooler...

Diesel Freak, I've been gonna attempt just that, on the next one. Mine still pegs the 50psi gauge and holds it there [53+?], but after 4 or 5 minutes, it pegs the pyro too (and holds ;-). I may wait now for the new motor build, but I won't quit 'til 70psi+ at 1325* or less, for the next one. Cooler will have to be super small, tho. I've found some car coolers small enough to mount under the factory cooler, but they are 10psi housings and won't handle much more than 25/30 (yet). A special order built one to my specs (44"x 5"x3" with right hand feeds good to 125psi) is $1375 + shipping. I think I'll keep welding on the SAAB cooler I found until I get it up to 100psi seem burst. I'll let you know how it turns out... T

 

[Diesel Freak]

Since this would be only a "race only" addition, you could just get a small water to air intercooler, and fill it with ice water between runs... . the ice would probably melt after 2 to 3 1/4 mile runs.



or,



use the air conditioner to keep the water cool. . put an extra set of cooling coils in the intercooler reservoir... you would just have to move the AC condenser to a different location... . say, in the truck bed with a large fan on it.



a 60F 15psi charge going into the primary turbo would surely allow some leeway for more fuel



the interstage cooler does not see as much boost as the engine, so you could get away with unit rated for a lower pressure.



think of it this way... 60F 15 PSI charge air going in to a turbo with a 4:1 pressure ratio..... yee haa 60 PSI... . then it goes through the factory intercooler... . drops to 80F (on a cool day)... ... bye bye high EGT!