modded CP3 + MP8 = holy crap!

[JStieger]

Well, I had to try it... run a pressure box only (left TST on 0x0) with the modded CP3 after reading all those early modded CP3 posts about getting the most from a modded CP3. I don't think I'll ever do that again unless I cap the rail relief valve. It's just plain nuts!



Seat-of-pants results with just the TS MP8 turned a hair on (maybe 20% on the adjustable knob):



1) This combo has even more touchy throttle response than the Smarty I tried the past 2 weeks does. Rail pressure goes from 5,500 psi to about 12,000 psi just by looking at the throttle peddle. Lots less smoke than the Smarty too.

2) How does cruising around town at 17,000 psi rail pressure sound?

3) How does cruising at 55 mph at 15 psi boost up a 6% grade with the rail pressure gauge reading maxed out at 26,700 psi with the high level alarm flashing sound? I had to slow down to 45 mph just to get up the hill for fear of blowing the rail relief valve.

4) Essentially when I hit about 15-20 psi boost I'm maxed out as high as the rail pressure gauge / sensor can read. Accellerating normally through the gears from a stoplights hits max rail psi in each gear!



Note that the above observations are with 90 HP injectors too. I wonder what type of pressures / results we would see with smaller or stock injectors?

 

[Diesel Power]

Well, I had to try it... run a pressure box only (left TST on 0x0) with the modded CP3 after reading all those early modded CP3 posts about getting the most from a modded CP3. I don't think I'll ever do that again unless I cap the rail relief valve. It's just plain nuts!



Seat-of-pants results with just the TS MP8 turned a hair on (maybe 20% on the adjustable knob):



1) This combo has even more touchy throttle response than the Smarty I tried the past 2 weeks does. Rail pressure goes from 5,500 psi to about 12,000 psi just by looking at the throttle peddle. Lots less smoke than the Smarty too.

2) How does cruising around town at 17,000 psi rail pressure sound?

3) How does cruising at 55 mph at 15 psi boost up a 6% grade with the rail pressure gauge reading maxed out at 26,700 psi with the high level alarm flashing sound? I had to slow down to 45 mph just to get up the hill for fear of blowing the rail relief valve.

4) Essentially when I hit about 15-20 psi boost I'm maxed out as high as the rail pressure gauge / sensor can read. Accellerating normally through the gears from a stoplights hits max rail psi in each gear!



Note that the above observations are with 90 HP injectors too. I wonder what type of pressures / results we would see with smaller or stock injectors?

im glad you R&D. i've been telling people the benifits of pressure for a long time and they acted like they did'nt care, maybe now they will listen... ..... Oo.

 

[JHardwick]

I'm not super knowledgeable, but I can tell you what I saw with alcohol injected sprint motors. For years bigger pumps and nozzles were the ticket with better flowing heads and all that progression. I think valves are at 12* now, they started out at 23*. Eventually a wall was hit at around 800hp. Then they figured out if they kept the big pumps, used smaller nozzles and set bypasses for huge pressure numbers to keep the same fuel flow through a smaller nozzle, they could break the 800hp barrier by 30-40hp. Better atomization was the key.



I'm kicking this around in my head as we speak. I'm ready for some injector tips I believe. I've got 208,000 miles on my truck, 150,000 or so with the EZ and the last 58,000 or so with the Quad race box. I've never had an injector failure although I did blow a relief valve. I feel my motor is flat and wore out injectors is the culprit. I think if those holes are etched and out of shape I'm getting some sort of dribble for a fuel pattern. In my mind a honed injector would be the same deal ... ... ... ..... that makes EDMs better?



Sorry to highjack your thread

 

[Diesel Power]

I'm not super knowledgeable, but I can tell you what I saw with alcohol injected sprint motors. For years bigger pumps and nozzles were the ticket with better flowing heads and all that progression. I think valves are at 12* now, they started out at 23*. Eventually a wall was hit at around 800hp. Then they figured out if they kept the big pumps, used smaller nozzles and set bypasses for huge pressure numbers to keep the same fuel flow through a smaller nozzle, they could break the 800hp barrier by 30-40hp. Better atomization was the key.



I'm kicking this around in my head as we speak. I'm ready for some injector tips I believe. I've got 208,000 miles on my truck, 150,000 or so with the EZ and the last 58,000 or so with the Quad race box. I've never had an injector failure although I did blow a relief valve. I feel my motor is flat and wore out injectors is the culprit. I think if those holes are etched and out of shape I'm getting some sort of dribble for a fuel pattern. In my mind a honed injector would be the same deal ... ... ... ..... that makes EDMs better?



Sorry to highjack your thread

you are correct about atomization, and the edm or extrude hones will help you problem.

 

[AK RAM]

Rail pressure goes from 5,500 psi to about 12,000 psi just by looking at the throttle peddle.

:-laf That's funny.....

 

[JStieger]

:-laf That's funny.....

I had thought that maybe I didn't hook up something properly so I double-checked the connections. I then turned the MP8 up to 100% and I hit constant 26,700 psi just off-idle so I stopped and disconnected the MP8.



I had the MP8 plugged into the MAP first, followed by the TST. The TST was set on 0x0, but I'm wondering if it does some boost reading manipulation when on this setting too?



If so, I might have to install the TST bypass plug to try again. Have you tried running your modded CP3 with just a pressure box? If so what rail pressure readings did you get?

 

[AK RAM]

The TST does fool boost 100% of the time, even when on 0x0. As long as it's plugged up, it's a fool'n.



I've never checked mine with just a pressure box so I don't have anything that would be a good comparison for ya. The best I can do is with the TST cranked way up (6/6 or higher) and an EZ on level 3, it still maintains mid-24,000 psi at WOT in the 1/4. Those two alone will put me in the mid 13-second category. That's not too shabby to still be able to maintain 24,000 psi. On the street without a pressure box, I will see stock pressures at any steady RPM and an almost stock pressure curve as long as I don't bring RPMs up too quickly, However, at instant WOT I can see 25K and some change for a second or two. That's with pressure fooling, but no pressure box.



With everything set on kill, it will maintain mid to high 19,000 psi in the 1/4. When I had the stock Cp3 on, I could continue to make power with my Flux 1's all the way down to about 14,000 psi. In my current configuration, 19,000 is as low as I can pull it down. There is a lot of fuel between 14,000 and 19,000 that I just can't tap into no matter what I plug in. I definitely need bigger injectors to get to it and I don't think that is gonna happen on this truck.

 

[Tomeygun]

Rail pressure goes from 5,500 psi to about 12,000 psi just by looking at the throttle peddle.

Goodness, Dont sneeze!!



I would what the EZ would do, I think the MP8 has always been roconized as a pretty strong pressure box...

 

[JStieger]

The TST does fool boost 100% of the time, even when on 0x0. As long as it's plugged up, it's a fool'n.

You were absolutely right about the 100% boost fooling. I installed the TST bypass plug this evening and then hooked the MP8 up again. It is much better now!



This MP8 is sure aggressive - and even more so combined with the modded CP3. Even with it on 0% it is still adding about 250 psi rail pressure at idle. The pressure now ramps up a lot quicker than without the MP8 installed or modded CP3 installed and feels pretty darn close to the Smarty low end, but without the touchy throttle. However, now I have the top end that the Smarty seemd to lack.



About 50% setting is the most I can run before the rail pressure gets maxed out on the gauge. This happens at about 1/2 to 2/3 throttle pedal and then I run out of gear. The cool thing now is that the rail pressure is sustained rather than falling off - at least that is what I see so far. However, I still need to try this combo on an open road to test sustained WOT.



Off-idle is so much better than just the TST twins program. With the TST alone it just seems to bog or hesitate / sputter off-idle a hair - almost as if the TST is trying to figure out what to do.



I'm curious to see how this will dyno now. When I was at Dyno-mite Diesel last year getting my cam installed there was a guy there with 90 HP injectors + Ramifier that did 480 HP. That torque curve was flat! So now with the modded CP3 low end pick-me-up that Tomeygun observed in his dyno with the modded CP3, I wonder what that curve would look like?



The next thing to try will be the MP8 with a Smarty since my TST doesn't like playing fair with the Smarty yet.

 

[Tomeygun]

You were absolutely right about the 100% boost fooling. I installed the TST bypass plug this evening and then hooked the MP8 up again. It is much better now!



This MP8 is sure aggressive - and even more so combined with the modded CP3. Even with it on 0% it is still adding about 250 psi rail pressure at idle. The pressure now ramps up a lot quicker than without the MP8 installed or modded CP3 installed and feels pretty darn close to the Smarty low end, but without the touchy throttle. However, now I have the top end that the Smarty seemd to lack.



About 50% setting is the most I can run before the rail pressure gets maxed out on the gauge. This happens at about 1/2 to 2/3 throttle pedal and then I run out of gear. The cool thing now is that the rail pressure is sustained rather than falling off - at least that is what I see so far. However, I still need to try this combo on an open road to test sustained WOT.



Off-idle is so much better than just the TST twins program. With the TST alone it just seems to bog or hesitate / sputter off-idle a hair - almost as if the TST is trying to figure out what to do.



I'm curious to see how this will dyno now. When I was at Dyno-mite Diesel last year getting my cam installed there was a guy there with 90 HP injectors + Ramifier that did 480 HP. That torque curve was flat! So now with the modded CP3 low end pick-me-up that Tomeygun observed in his dyno with the modded CP3, I wonder what that curve would look like?



The next thing to try will be the MP8 with a Smarty since my TST doesn't like playing fair with the Smarty yet.

I bet the TST/MP-8 with now the modded CP3 will net the best HP number...



One thing is for sure the modded Cp3 does increase low end fueling as notes on my dyno graph. I look forward to your results

 

[JStieger]

Well I took the MP8 off after some freeway runs this evening. With it at 0% and the TST completely bypassed, my rail pressure at 75 MPH cruise on level ground is almost 19,000 psi! I guess I know for sure that I have a modded CP3!

 

[JStieger]

Update!

Well, I feel pretty stupid now. When I took off the MP8 I noticed that the adjustment knob terminals were broken off. So thinking that perhaps the MP8 was stuck on a high setting I called TS up and they sent me a new control harness. Installed it this morning and now I can do full throttle runs with the MP8 at 0% without a rail pressure worry. 30% setting is about all I can do hammer down still before the rail pressure hits the sensor high limit. This was with the Smarty on 60 HP no timing and TST off.