13mm pump on the street?

GOT-Torque

GOT-Torque

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Jul 2, 2007
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Has anyone ran a 13mm pump on the street occasionally? What are the downsides/disadvantages of this?

Wondering how feasible it would be to run a 13mm pump for pulling, adjust the plate, and also change injectors if needed to tone it down for some street driving in the off season.

Anyone put some miles on their 13mm pump without problems or with problems?


Is it a :badidea: OR :st:
 
Lot of it depends on govenor spring setup. Get a good set of 5K GSK's and it would be good. I ran my 13MM on the street some, and only issue was when I cranked down on Govenor springs, I could rev the truck slowly to about 1000RPM, and then it would shoot up to 2200 and then could rev normally again. So imagine what happens when your trying to drive between 1000 rpm and 2200 rpm. Lots of surging. I put in a different set of springs and the truck was much better.
 
Mine is very drivable. Only trouble I have is when you let out of the throttle to shift then go to get back into the trottle, it wants to jerk a little. Easy to overcome with some training on the right foot.
 
So with some spring changes, a plate movement or swap, afc adjustment, etc you could dial it down to drive on the street? No issues with the pump itself?
 
2Tone12V said:
No get issues?
Click to expand...


Not unless I'm at WOT. Cruising the truck runs around 760*


I have not touched the pump, besides to adjust the idle since my last dyno run...

I love this pump. I had a 913 before. If anyone wants to come over for a ride or drive it down the road to see how the pump is Come on over.

Just bring a six pack:hehe:

I got the pump from St. Joseph Diesel.

I have not got to hook with it yet, just got it done after the season was over.:bang

I haven't turned my timing down either its still at 32*

Its not my daily driver but I do drive it every weekend and I'm not scared to take it anywhere.

Later
Adam
 
Mine was a bit of a pain on the street. It is fully built with a set of 4K springs and a lightened govenor. It can easily rev to 6K with that setup and it was very touchy in gears 1 thru 3. It would hop and buck like crazy. It was deffinatly fun to drive on the street...just a little scarry! With my small injectors 215's and the sled puller 66 when I had just the single on it to break in the motor I couldn't go past half throttle or it was like everything behind me turned into darkness!

I havn't driven it on the since I put the twins in and the HUGE injectors but the way it acts in the pits....I wouldn't even want to attempt it on the road. Bucks even more now.

RyanB
 
I ran one on the street for a whole lot of miles, drove it to Canada and back, Vegas and Muncie. The main issue that I see is trying to run too small of DV holders, DV's and injectors, this caused too much internal pressure in the pump and beat up the cam over time, this is driving like an idiot.

Cruising is fine as long as the Gov is set right but you will have to learn the right foot rollover for the throttle. .093 injection lines caused Gov spring bounce at high altitudes and light throttle.

Jim
 
Hmm, this is an old thread, but it's a pertinent subject to me. I'm running a 13mm pump on the street. Mostly on the highway. Anyway, when I run it up to 2200 RPM or so it starts to stutter a bit and the smoke gets thick. When I'm running downhill under light throttle or coasting, it seems like a gasser that's running out of gas. Any of you 13mm guys encountered running conditions like that? I've dialed the starwheel back some, which seemed to help a little when putting around town. But on the highway it's the same as always. Idle is kind of rough but it doesn't really haze now.
 
Mine is a pain in the butt. If you hold a steady throttle its very jumpy. Cant get into the throttle very hard or it kills the motor. Slowly let the boost come up and she takes off!
 
That's about the story with mine. I just don't understand the surging at light load. It's rather unnerving. I'm hoping I'll be able to roll into the fuel a bit better when I get the new twins in. I've got a fuel pressure gauge coming so I can see what the FASS is doing while all this surging is going on.
 
I think lots of it is the govenor setup, and the large fueling ability.
 
Could be. The pump was made with a 4KGSK. I may ask II about the problem once I have done everything I know to do for tuning it.
 
I decided tto go ahead and give Industrial Injection a call to ask about the low/no load surging issue. They tell me the pump wasn't really made for running on the street like I'm doing, it's made for running balls-out down a drag strip or pulling a sled. But others have called and mentioned this surging before, and it's common. Just the nature of the animal, they say. :evil
 
Yep I dont think a 13mm is made for the street. You can drive it on the street but not made for it. Your fuel pressure shouldnt be changing. Like Dan said its probably in the governor set up. Mine does it set at 525cc's. So its not being overfueled alot. Im sure it would be really bad if I cranked it up to 900!! I can only drive mine about 3 miles on the road anyhow. Unless I can plumb in a 100 gallon water tank in the bed to keep water in my block. The cracked block pretty well took away my driving on the street problem!
 
Like Jim, I ran our 13mm PDR race pump on the street in my daily driver for almost 3 years with no issues at all. Smooth from idle to 4000+, towed with it many times and made many trips up and off the Alaskan Hwy. Got better fuel mileage than when the truck was stock.

I sold the truck but I ran our twins twins, 23 deg's timing, 191's, stock lines, 370's.

Egt's are an issue when pushed hard but ran as normal when driven normal to medium.
 
Hmm. What do I need to do to the governor to make it behave itself? I'm willing to try to make it better. I just need some guidance, since I'm a NOOB. And I ain't getting any guidance from II. I already asked them.
 
I actually haven't had the plug out since I bought the pump new from II. Is the surging caused by having the spring tension set wrong? Usually in my past experience if I set the tension wrong it has a huge effect on idle. It's either way too high, or it won't run.
 
I had a set of 4GSK, that when they were set loosely, they drove very well, but once you started cranking them down for more RPM, they behaved like you mentioned.
 
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