As many of you know I had a high flow vp44 built to replace my little HO pump on my 2001 truck. I have had many people ask many questions so I will try to answer them.

The Pump:
Considerable amount of resurch has gone into this pump and the shop that is building it has spent a considerable amount of time in resurch and development. The pump flows between %13-%18 more fuel than a stock vp44 on the test stand which results to about 50 more horsepower on a non HO pump and 50+ for an HO pump depending on how large of an injector is used. The pump is made with bosch parts and is rebuilt using bosch specifications. So the reliability and durability is the same as any reman pump you would recieve directly from bosch. The pump is tested, the timing calibrated, and the PCM reflashed on a Bosch EP815 electronic test stand. This is the test stand that Bosch uses to rebuild its vp44's. The pump does not consist of cut delivery valves because cut delivery valves causes problems with the injector pop off's and throws timing so far off that it cannot be set correctly or adjusted for. This pump is built to get the maximum amount of fueling possible out of the vp44.

The Results:
I did not have an oppertunity to dyno directly before and after the installation so I will just describe the best I can the increase in power. The SOTP meter tells me it netted at least 50hp. The amount of fuel this pump puts out is verified when I recently dynoed 500hp and 1017lb/ft of torque on injectors only! The truck runs smother and revs up quicker than it did prior to the install. Although the main reason I bought this pump was for the horsepower... this was not even the best result from the pump. Imidiately after installation of the pump I saw a significant drop of smoke during daily driving. It was like a majic wand made it disapear. The pump dropped smoke dramatically at light to mid throttle application while still have a large increase in power. I still have no smoke during daily driving while using injectors that are not recomended for the street. EGT's remained unchanged after the instalation even with the extra fuel being delivered.

The Verdict:
The pump is something I would recomend to anyone ever having to replace a VP44, anyone that wants to make 500+hp and still have a perfectly streetable truck, or anyone that wants the most power they can get out of there 24v. This pump is a slightly newer version of several Hot Rod pumps that are already on the market. With most Hot Rod pumps costing around $3000 and the cheapest I have found that cost $2000 + core charge; this pump is going to be extremely cost efective and borderline cheep. I believe I will have a solid final price tomorow and the name of a vendor who will be carrying the pump.

I know I have probably left stuff out so if anyone has any more questions please ask and I will be happy to answer.

Horace

 

I'd like to know more when you have the info.

Nothing wrong with my VP44 now but for future reference it would be nice to have a vendor name and price.

Thanks
DB

 

Horace,

You done well young man. I remember when you were researching this sucker, and it sounds like it got you everything you thought it would.

With the combo your running(JR Turbos, Don Injectors, etc...) sounds like a sweet old truck.

Andrew

 

Thankyou for posting your VP44 modifictions,I wanted to ask if your truck stalls or runs rough after a really hard acceleration & decelerate suddenly.It some time will stall only if you let of the throttle suddenly.If you let of easy it wont stall. Because alot of us with VP44s are running into this problem, particularly if we are heavily bombed with twins.Some of the guys that are running single turbos also are running into this problem.If the modified VP44 fixes this issue.I would be interested in talking to you about getting one.Merv

 

Nice.

I was skeptical, as most other VP's didn't perform as well as thought.

This one seems to be the hot ticket.

I might have a good .027 spec VP44 for sale real soon,, *hint-hint* Wink-wink,,, if you know what I mean


Good Job Horace,, you've put alot of research in that truck, and it's paying off. Keep it up !

Merrick

 

sorry to get off the subject but if i understood correctly you're saying that a so pump performs better ho pump stock?

 

What do you think this pump will do to a stock truck that needs it's VP replaced? Could you tow with your truck?

 

Well it looks like the final price for the pump is worked out. Again this pump is an updated version of some High Performance pumps on the market that is made with a slightly different process. Using my better judgement I'm not going to post the price publicly on the forum but I'll let you know where you can get them. Piers is going to sell them, he has sold several of the older models but the new ones are at a lower price! If you are interested give him a call and tell him who told ya to call! When word of the price and performance gets around I bet there will be a waiting list so yall better hop on the bandwagon while you can.

Horace Mast

http://www.piersdiesel.com/ContactUs.htm

 

Yes with a fueling box the so pump out performs the ho pump because of the size of the plungers and barrels.

This pump is perfect for anyone that needs there VP replaced. Even a stock truck will see an increase in power. The power will be more noticeable when larger injectors are added though. Yes I can tow easily with my truck with no smoke.

I know exactly what you are talking about... when running big injectors with twins after a hard run it seems a little air gets into the fuel lines. I saw this many times when I was running 14 hole EDM injectors. I dynoed the other day and I did not have this problem with the new EDM's and the pump.

Horace

 

any mileage drops?

 

Do you have any kind of idea if a warranty will be offered?

 

Nope... milage seems consistant to what it was before.

No I don't, but like I said before these pumps are built to closer tolerances than the Bosch Factory Rebuilds. I believe there are 10 of the older version pumps on trucks and none have failed.

Horace

 

There seems to be some confusion about purchasing a pump. I have had lots of PM's but I have had to delete many of them because of the limited amount allowed. If you have PM'd me in the past please e-mail me back. If anyone else wants more info or has questions about purchasing the pump and the specific prices please e-mail me also. I can't advertise the price on the board because I am not an advertising dealer here on the DTR.

horacemast@hotmail.com

 

Horace,
I thought of another question. Will these pumps come with the wire already tapped with a connector so it will be easier for us to wire our box into it?
I emailed you.

Thanks,
Chris

 

TTT,I brought this back to the top because i think my pump is dying & i am very interested in this new pump.Has anybody else had any experiance with this pump & what are your thoughts.I brought this pump up on another sight & was told they have a high failure rate is there any truth to this or is it just gossip.Horace,Hows your pump doing & is it smooth on the street?I noticed with my truck im getting a miss or a stumble at higher rpms (3000 +) & at certain pedal positions (usualy lower rpm)im getting a surging that can turn into a violant buck if i dont let off the pedal.Im getting the following codes also-0622,0743,0500,1765,1693,0501,0216 i will clear the codes & see what comes back.My truck has only 20,000 miles on it .Thanks for any help.

Kurt