Originally Posted by NMB2

I have been up for 36 hours now.

I got the truck running with lots of help from totalled and a little bit from typ4 and his buddy Dan.

We were on our way to the dyno and I made it 20 miles when I realized my temp gauge was reading normal but my heater was cool.

Pull over, figured it hit an air pocket, I put a gallon of water in, and it starts pouring out of my bellhousing.

Freezeplug that was installed last night wasn't done right, and fell out.

Originally Posted by 91dirtydiesel

yes we have a comparison between type4 and racin...peaks and rpms on cams are obvious the "torque cam" reaches it much sooner and holds it good....pics of print outs coming

Originally Posted by FORDF250HDXLT

thats what counts when setting up an engine for work duty right there.
im so exited to see his chart i can't stand it!

looks like you put down some good numbers yourself there 91! congrats man!

Originally Posted by RacinNdrummin

Originally Posted by RacinNdrummin

Dyno Day 12/17/2011- Dougs 2005 Ram 5.9/6-spd - YouTube
Dyno Day 12/17/2011 1992 F250 7.3IDI/5-spd - YouTube
Dyno Day 12/17/2011 Papastruck 1986 F350 6.9/Auto - YouTube
Dyno Day 12/17/2011 GMC 3500 6.5TD/Auto - YouTube
Dyno Day 12/17/2011 91DirtyDiesel 1991 F250 7.3/5-spd - YouTube
Dyno Day 12/17/2011 RacinNdrummin 1988 F250 7.3IDI/5-spd - YouTube
Dyno Day 12/17/2011 Typ4 1991 F350 7.3IDI/5-spd - YouTube

Originally Posted by RacinNdrummin

First of all, I know there is a lot of disappointment in what my numbers showed on the dyno, as there was a lot of expectation considering the work I put in on my setup. Let me just point out that other than my studs and cam/springs, I have a 100% stock 160k 7.3IDI longblock. My custom manifolds and hotside only serve the purpose of spooling the turbo as quick as possible, and as Typ4 can attest, gets the turbo (Which technically should be more laggy than stock) going at least as fast as stock if not quicker. My custom split intake was to serve the purpose of removal with studs (And as I look at it now, more of a pain than its worth) The mods to it were to even out cylinder flow and get rid of the stock hat for a positive seal, there was no porting of any sort on my manifolds. The bread and butter of my engines performance is going to be delivered by the Turbo and the IP, unfortunately the IP just weezed out.

I started at 203/445 on my first run, which was really disappointing to see, what was even more disappointing to see was when I started advancing the timing, the numbers actually began to drop, and the more I advanced it, they more so they did. We decided to go the other way and retard the timing, and I was really suprised to see the numbers make big gains, til eventually it didnt make a difference. We then proceded to play with fuel pressure and got some minor gains, and then we kinda hit a wall, this was around the 225/470 mark. When Russ arrived with Dan, and they put their experience to my setup, we ended up playing with the RPM, setting the fuel pressure (with a decent guage) and messing with the torque screw... This equated to 10whp and 7ft/lbs and that was all we could squeeze out of it, it was just done. In total I made about 10-15 runs and this was the result:



The truck now drives exactly how that comparison looks, it feels completely different, and much more fat in the middle. Im very happy with the performance, and while I had 250whp/500wtq as an expectation pre dyno, im still impressed with my engine as it is, and it will do everything Ive set out for it to do.

You guys have to remember, what my truck laid down is in "bolt on" mod 99-03 7.3 PSD territory, and probably does it at a lower RPM.

Now as far as the future goes, My plan is to A) buy NMB2's DB4 (If he will still sell it to me) If not, then B) Get Ken to build me a DB4 and if he doesnt want to do that, then C) I will figure something out whether I have to build my own pump, or find a better option than the DB framed pumps. Also, Im going to build myself an intake the same as I built for NMB2, as I think its plenum and flow area is better, not to mention its a cleaner setup and I can eliminate the plenum box I made.

Other than that, I see no reason to change my setup. Im going to leave my CR stock, as there wasnt even a hint of diesel ping, and with my turbo and IC, I think it would do mid 20's boost and not have any problems.

Anyway, thats all I got for now, if I remember anything else I forgot, Ill make sure I post it up.

Originally Posted by RacinNdrummin

So I think one of the biggest benefits of the dyno run yesterday was that we got to see a comparison between the two IDI "upgrade" cams, The tried and true Typ4 "Torque" cam and the new J2 "powershaft" that NMB2 and I have in our trucks.

After I made my runs, and Russ made his runs, we overlaid the graphs and this is what we got:



Now, instantly when I saw the graph, I thought, holy crap, the Torque Cam handed the J2 cam its ***, and in a lot of ways its did. It has a serious ramp and a flat top, flatting out at around 1800 and tapering off at just over 2200. The J2 cam flattens out at around 2200 and starts dropping around 2500... This is all on the Torque side of things, which most consider to be the bread and butter of a diesel engine.

As far as hp is concerned, the Torque cam and J2 cam rise similarly with a slight (but probably un-noticable) advantage to the J2 cam, until the torque cam falls off at a little over 2800, and the J2 cam keeps pulling until redline (and maybe even past, my gov kicked in shutting stuff down).

Now a quick glance at the chart would make most not even want to consider the J2 cam. However, in discussion with Russ, and even more now that I have driven my truck on the freeway since and looked at what the RPM's are doing, We both believe that the J2 cam benefits those with 4:10's better and the Torque cam benefits those with 3.XX:1 gears better. My truck cruises 60mph at 2200 with 4:10's and stock tires and Im right smack dab at my torque peak on the freeway...

Basically, if you like to drive fast or even with traffic for that matter, and you have 4:10's or higher (or equivlent in tire sizes... essentially 2200 or above on the freeway) The J2 cam is probably gonna be a better choice, but if your spend most of your time in the Sub 2k range, the typ4 cam is going to be better suited to you.

Russ, do you have anything to add/change??