Competition FCA mod done. Now I got a surge. Tho it woks well

[JasonCzerak]

So I took the instructions from Relentless Diesel.com :: View topic - CP3 Modifications you can do yourself!



I didn't "break" anything. So I did something right. Truck idles, and goes WOT and you can drive "normal" per say.



Smarty on 9, TST no timing on 2hp/0tq/2rail std program.



When on moderate throttle say, 1/2 peddle. Rail pressure around 17,5000 It get a bucking serge while under 60mph. no so bad over 60 cuz you need more peddle to really accelerate... I do need more then the 10 miles I went to get a complete description of all driver situations. However I'm sure someone has done this and didn't get it right like me?



I used the smallest dremel cut off wheel and cut near the top just like the pictures. tho I could of been more "Accurate". I for sure have the bottom half of the triangle there. I didn't make it more open to the top. As in making the triangle taller (better idea?). Just wider.



I did drill out the one hole on the pump cover. Left the other in place since it was in spec with the numbers on the site.



Maybe I just need to change my driving habits?





As for performance, Holly poop this truck gets up and goes. I know I got more HP!!!! I moved the TST up to 5 with the smarty on 9 (170hp + 100hp). above 2500rpm the Rail holds at 22. 5 all the way up to 3500rpm. In 6th I got to 1800 degrees at 115mph... Officially too to much fuel for this stock turbo.



With the TST on 5 and lower then 2500rpm, I can still drain the rail and get some popping due to rail drainage. . I didn't do much with the tst on 2. but I did kick up to 5 while on the WOT highway run. . pulls strong, but fell down on it's face at 115. most likely due to temperature (1800 egt).

 

[PRout]

Holly poop

Is that one of their new lift pump designs?

 

[ENafziger]

In 6th I got to 1800 degrees at 115mph... Officially too to much fuel for this stock turbo.

Wow... I can't help you on the FCA mod, but those are some pretty high temperatures to be hitting. And here I've been feeling bad for pushing things to 1500° a few times! :-laf

--Eric

 

[drury]

I did the FCA mod back before I ported my cylinder head and did injectors and haven't had any surge problems before or since. When I first did it, the mod list was something like:



GDP fuel & intake, Edge Hot Juice=6+EZ=1, Spearco IC, Scheid cam, AFE Stage 1 Pro-dry, Rokktech exhaust and High Tech 62/13 turbo.



The mod made a difference for me as well. Holly poop!

 

[scottctd]

I just did the FCA mod as well, and don't have any surge issues. We did the plunger mod in a mill, so the newly enlarged openings are pretty precise.



Did you guys notice any additional smoke as some of the others have? I have read some posts that claim a lack of driveability, but I don't have any issues with it at all. I didn't notice a big difference overall, but I'm also not running as much fuel as you all (I'm Smarty #9 only).

 

[STRALEY]

Is this make the CP3 basically the same as a MOD CP3? 30% over?



Jeremy

 

[JasonCzerak]

Is this make the CP3 basically the same as a MOD CP3? 30% over?

Jeremy

I think so.

But be prepaired to make a few mistakes. the instructions do lack certain bits of info. like how thick of a cut to make how low. and all that. I ended up going with a cp3 builder to send me a new FCA done right. (with real tools).

tho it's a good idea if you have a a few $$$ to toss around and "try" with.