Project: The New CDD Shop Truck

Thewespaul · Oct 14, 2018

Just an update. Fuel cooler works great, definitely have more fuel than ever, especially with these injectors which still haven’t had any issues. I’ve got the tuning about where I want it so I think it’s about ready for the dyno.

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I put my other bottle in and decided the little solenoid was too much a restriction. Upgraded to the zex (rebranded nitrous express) high flow solenoid, 400 shot rated.

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With a .78 jet in this thing moves. It lights the turbo to 10 psi as soon as you hit the switch at 1200 rpms. I’m going to get it on the dyno before taking it to the track again, because the clutch may not hold up to many launches passes at this power level. Very happy with how the truck is performing now.

nostrokes · Oct 14, 2018

Ahhhh liquid horse power.... No offense but never been a fan rather see mechanical ways of building power as apposed to chemicals..

Thewespaul · Oct 14, 2018

None taken, drag racing I started out with nitrous big blocks then went to turbo ls... turbo is definitely the way to go, but I’m a fan of all ways of making power. I’ll be sure to make several passes with and without spray to have solid numbers for both. The spray was really just to get as much as I can out of a stock pump and stock turbo, the upgrades to follow after I set the benchmark with stock turbo/pump will all be mechanical, gonna be going after the idi overall record

nostrokes · Oct 14, 2018

Hmmm wonder if there is a way to "port" the pump and maybe open it up a little and push a bit more fuel through it not really up the pressure but get more volume..... Like a fire hose, the larger the hose the more volume, but the smaller the hose the more pressure.... I guess the biggest resistance would be the injector.... But if you could volume match and not pressure match them it would be possible.. but then you will need bigger valves to move it all...

Sorry for the rambling, but just a thought...

Thewespaul · Oct 14, 2018

The plungers are the limitation, in a db2 it is built around two .310” plungers that move the fuel. With some internal changes and a stage three leaf spring I’ve gotten 130cc out of a db2. I’m working on a db4 that should hopefully break into the 210cc range. That’s enough for 600hp, and I’ve still got the 3208 pump conversion in the works, just saving up for all the cnc work.

natesewell901 · Oct 14, 2018

Do you have a pic of the whole truck

The_Josh_Bear · Oct 14, 2018

Thewespaul said:
None taken, drag racing I started out with nitrous big blocks then went to turbo ls... turbo is definitely the way to go, but I’m a fan of all ways of making power. I’ll be sure to make several passes with and without spray to have solid numbers for both. The spray was really just to get as much as I can out of a stock pump and stock turbo, the upgrades to follow after I set the benchmark with stock turbo/pump will all be mechanical, gonna be going after the idi overall record

That's great, cant wait to see the results!
I have a small favor to ask...can you lay down the fuel-only dyno runs first? That way if the nitrous turns dyno-day into a yard sale we still all get to see those sweet numbers!!

Thewespaul · Oct 14, 2018

19nindee said:
Do you have a pic of the whole truck

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Thewespaul · Oct 14, 2018

The_Josh_Bear said:
That's great, cant wait to see the results!
I have a small favor to ask...can you lay down the fuel-only dyno runs first? That way if the nitrous turns dyno-day into a yard sale we still all get to see those sweet numbers!!

That’s the plan! Although I think if the nitrous was going to scatter the engine, it probably would have done it in my first run when my old momentary switch stuck on and the nitrous stayed on for 30-45 seconds....

YJMike92 · Oct 16, 2018

Doesn't that all look like too much fun.

Thewespaul · Oct 18, 2018

It is.

Well the truck went under the knife tonight. Pulled the turbo off to replace a leaking oil drain grommet and to install a ported intake hat, you can see the difference here

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Turbo flange gasket has seen better days.

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Didn’t get any more pics but got the oil drain cleaned up, and tapped the ported hat for nitrous and methanol nozzles. Got my old water **** kit installed from the old engine, various gph nozzles should be here from McMaster Carr tomorrow so I’ll finish things up then.

austin92 · Oct 18, 2018

Which water **** kit are you using? I’ve read on it before and everyone says cheap kits can let droplets in the engine but I don’t want to pay 1000$ for a snow performance kit. Also being na (for now) I want one that reads off egts instead of boost

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The_Josh_Bear · Oct 19, 2018

Thewespaul said:
...a ported intake hat, you can see the difference here

Do you have any expectations of performance gain with that porting? And would you expect it to do much for the stock setup running charge air cooler?

I love the work and the updates! Keep up the good work! :peelout

Thewespaul · Oct 19, 2018

austin92 said:
Which water **** kit are you using? I’ve read on it before and everyone says cheap kits can let droplets in the engine but I don’t want to pay 1000$ for a snow performance kit. Also being na (for now) I want one that reads off egts instead of boost

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Nothing special, just a 150 psi pump, a 2 gallon tank, some old nitrous lines, a nitrous fuel solenoid. I control it with a Hobbs switch and wot switch. It’s just extra parts I had laying around, which has kinda been the theme with this truck.

As far as triggering from egt you’re going to have to buy an expensive name brand kit for that, but I’m working on something that may work for you, just gotta make a thread about some electronics questions I have, if I’m not too far off course with my idea a modified fipl should be able to signal different stages of water **** or nitrous just by reading the voltage output.

Thewespaul · Oct 19, 2018

The_Josh_Bear said:
Do you have any expectations of performance gain with that porting? And would you expect it to do much for the stock setup running charge air cooler?

I love the work and the updates! Keep up the good work!

It’s definitely the bottle neck in my setup, the intercooler piping is 2.5” and the hat brought it down to 1.8”. After the porting it’s at 2.4” so I’m hoping to see a drop in boost pressure without the bottle neck there causing pressure drop.

Project: The New CDD Shop Truck

Thewespaul

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