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

[Brayden]

I'm torn on what RPM to set my P-Pump up for.



I have a stock 24v, and I'm shooting for 400-450hp.



I've heard that 3800 is point at which the valves float. Would a 4000 rpm GSK be OK to run? I'm eventually going to upgrade the valvetrain to handle some more RPM's.



What have you guys safely run on the 24v's?



Thanks,



Brayden

 

[TXDSLSHOP]

Springs

The 4K GSK from Piers comes with exhaust springs to address the valve float. That is unless I am mistaken.

 

[Brayden]

That is for the 12 valve motor though. . I could buy two of the spring kits I guess. .



Any of the p-pump guys have an answer?



Thanks in advance. .

 

[Jetpilot]

Brayden,



If you are going to P-pump a 24v motor I suggest speaking with Piers. He did my conversion and I love it! As for valves..... Well right now there aren't a lot of options for us. There is a nice set available but the springs and retainers run about $3k. We can't use 12v springs for our motors. I know of some things that are in the works but only time will tell what they will cost and if they work.



Currently I don't like to spin my motor past 3500 rpm. It has seen slightly higher once or twice but that was by mistake not intentional.



I do have a question for you. Why are you doing a p-pump 24v conversion but only looking for 400-450 HP? That number is very easy to obtain with your original pump plus will be more efficient and cost a whole lot less money. Just curious



Doug

 

[Ncostello]

Jetpilot... he is putting a 24V into a Chevy S10 ZR2 truck to make a rock crawler/mudder type truck. I think he said he wants the simplicity and or reliability of the mechanical pump. If I remember he got a good deal on a 24V engine but likes the Ppumps. He's got some really good photos over in the conversions forum.

 

[Brayden]

I purchased an 01 24v motor with 100,000 miles on it.



I didn't know the conditioin of the VP44 or the lift pump.



I want the reliability of the p-pump. I'm building an off-road rig (check the conversions forum) that could see water/harsh conditions. I don't want to get stranded 5 miles from the road where no wrecker could imagine getting.



I've got all the components for the conversion. .



I plan on making more than 400-450hp someday. The p-pump has more potential.



Is this custom set of springs coming down the pipe proprietary info? When are you expecting these valves/springs/retainers to come out?



How much Hp are you running? How many cc's of fuel is your pump setup for?



Thanks :thumbsup:

 

[Brayden]

Yeah what Neil Said



Thanks buddy. .

 

[Snow man]

Like Jetpilot said,id keep it below 3550. Ive heard the valves will contact the pistons above that speed on some 24V. s . Mine totally governs out at 3500,ive had it there for a long time ,so i know 3500 is ok.

 

[Brayden]

Thanks...



Now another question.



I've recently run into some money. . what are the best internal mods to do while the motor is out? I'm probably going to have Scheid's o-ring it. What else?



Thanks

 

[Snow man]

with 100k on it, id changethe head gasket at the minumum while its out. If you are going for more than 45psi of boost or twins down the road,now is the time to O ring the block too. Consider the . 020 thicker 12V head gasket . I think Piers has them,they are water jetted for the 24V.

 

[Brayden]

Twins & 70psi are down the road. . They're about 2 exits away :-laf

 

[ToolManTimTaylor]

Hey Brayden Did ya send out that APPS yet? I just put 2+2 together

 

[Brayden]

tomorrow morning buddy. . Sorry it's taking so long. .

 

[Ncostello]

Toolman... did you also notice some stuff that "fell" off a 24V there on eBay?? All from the same seller?? It was a dead give away.

 

[Brayden]

What



It wasn't the ZR2 in the seller name was it?



Neil, I'm getting closer. . I'll give you a call when I go to fire it up. .



Should have my flywheel housing here later this week. . Then I'll have the allison bolted up to my motor

 

[Battering Ram]

Brayden, You can get double steel springs with titanium retainers and chromoly locks for around $1200 give or take $100 or so. This would allow you to install a 4K gov. kit with now problems at all. It's pricey though.

 

[Ncostello]

Thanks... let me know... I've got to see this. By the way... have you already thought of a tilt front end? That would make engine maintenance a snap in such cramped quarters.

 

[Brayden]

Thanks for the info battering ram. Does anybody know what kind of spring pressure these springs are @ installed height, open, closed? I don't see why you couldn't use one of K-motion, or a similar companies existing springs. There are thousands of sizes out there and I'm sure you could find something.



Who makes the kit you were talking about? Where do I sign ?

 

[ToolManTimTaylor]

Originally posted by Brayden

tomorrow morning buddy. . Sorry it's taking so long. .

No biggie ... It's just my slow thinkin' that put the two things together.

 

[Floor It]

I've looked at every spring MFG to find a drop in spring with more spring pressure and there is none. I found a set the is close and only needs to be machined out a bit. I have had custom intake and exhaust valves made and I've talk to them about making custom springs that would be a drop-in, but I have to have so many made for them to do it. I've heard of a few sets out there, but from what I've heard of their spring pressures it is WAY TO MUCH! IMO.



John