Engine/Transmission (1998.5 - 2002) P-Pump'd 24V Governed RPM

[TxDieselKid]

Be sure to check out Fire-rings instead of o-rings. These are from Haisleys, but I think Schieds MIGHT be able to do them also.







Andrew

 

[Brayden]

Yeah Scheids are fire rings. . Thanks bud. .



Does anybody know the actual spring pressure and specs on what we need?



I tried searching, but I didn't come up with much. .



Aren't the exhaust springs you get with the 4gsk 60 lb springs or something. . This is way low compared to a gasser spring pressure. They're in the neighborhood of 350 closed and 800 open. That's probably a bit much. .

 

[TxDieselKid]

Originally posted by Brayden

Does anybody know the actual spring pressure and specs on what we need?

I know you talk to Piers before, did you ask him? I think he would know.



As for setting up the pump, I would go with either a 3. 5K or 4K and just remember to keep my foot out of it.





Andrew

 

[MCummings]

I am in the understanding that stock 24V heads come with 90LB springs straight from the factory.



*I* would set the govener for 4,00RPM, but not run the motor without a load over 3,500. You could use the extra 500RPM to help you get the RPM up for the next shift and such. But, this advice is coming from a guy that breaks stuff.



Merrick Cummings Jr

 

[Battering Ram]

Brayden, I PM'd you the info on those springs.

 

[Brayden]

Could you resend the PM, I think my inbox was full. .



Thanks,



Brayden

 

[Battering Ram]

Sent ya another one.



Horace

 

[Battering Ram]

Now you caught me with my inbox full. It's fixed.

 

[Brayden]

Got it.

 

[Roger rodbolt]

Brayden,

I converted my VP44 to a P7100 for reliability and would warn you to drive as many conversions as you can before you do it. If your S10 is for rock crawling I can tell you that driveability with a single turbo high hp P7100 will be the pits compared to a VP44. Comparing a single turbo 500 max hp VP44 CTD to a single turbo 24V 500 max hp P7100 equiped truck is mind shattering. The VP44 maintains most of it's stock lowend throttle response. The P7100 can not adjust timing and if turned fuels far to much with light throttle and large enough injectors to make decent power. The high rpm governor springs help high rpm power but hurt driveability down low. My experience is that for rock crawling I would keep a stock or almost stock P7100, run small injectors and limit horsepower to ~350. As far as reliability goes my VP44 lasted 70,000 or 80,000 miles and I've had four P7100's on and off at least a half dozen times. Timing needs to be changed back and forth for rock crawling and playing on the street if you intend to do both. Please don't take this as a flame to anyone, but don't listen to folks that haven't lived with a converted P7100. Drive several converted trucks. Ask about driveability, smoke, horsepower and torque at lower rpms, if turbo changes are needed. Ask honest pump shops how often highperformance P7100 need to be calibrated and what it cost to run them on their pump stand. A spare VP44 would be the biggest bargain any rockcrawler could buy compared to a P7100 conversion, IMHO. If your wanting to spend money I'd look into common rail... ... ..... Larry

 

[jwilliams3]

Common Rail will be a pain, it has all that PCM stuff from Chrysler integrated into the ECM.

So minimum you'll need a PCM to match the engines ECM.



--Justin

 

[Brayden]

Sorry I missed this thread... I'm kinda set on the P-pump. I'm really not into west coast style rockcrawling. . It's more trail running than anything. . The drivetrain I've got will give me plenty of gear reduction, so most of the time I'll just be holding the truck back with the brakes, engine idling. . I'm running twins on it for sure. . I'm gonna run my HX35w/12 and a B2.



Thanks for the insight though. . I'll definately try to find some trucks around Indiana that are P-pumped... OK guys who wants to let me test drive their truck? Scheids? Van Haisley? JR, you're close. . don't you have a p-pump truck?