can you post picks of the intake your comparing. I know what stallworths looks like. I cant wait to show john the plenum we designed.

runs look good by the way. how does it respond in the real world? alot quicker?

 

You know what the intake looks like. LOL it's yours. Only difference is the ump plenum and the stock plenum with the velocity stacks. No pics yet since we haven't finalized the installation on this particular rzr but we will get some soon enough. We are headed to the dunes next weekend for some real world testing and yes the motor responds very quickly. The clutch has such a smooth engagement you don't really feel it though.

I really think that the stock plenum with the velocity stacks are the way to go. From what I have seen it loses too much on top to go to anything different.


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Well I had the ump intake ordered since the 1st of Feb. I just emailed and cancelled the order since I still hadn't received it and was charged 529.00 on that day.. Money returned today. So your saying pods like alba are the best? What should I do???

 

I have not seen first hand any info on using pods. JSR does offer an option that uses the stock plenum with an intake tube and huge K&N filter that is placed in the bed area. Call them and ask them about it. 316-269-4465.


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I have not seen first hand any info on using pods. JSR does offer an option that uses the stock plenum with an intake tube and huge K&N filter that is placed in the bad area. Call them and ask them about it. 316-269-4465.


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Not sure if I want a hole in the bed if thats what this kit does.. Thanks for the reply.

 

Can someone posts pics of the different setups! Pllllllllllease!?

 

Here is the standard JSR setup through the bed.

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It's actually a fuelcustoms filter. Fci 8 ply vs k&n 4 ply twice the protection and same flow rate.

 

Is it the stock filter media and configuration thats restrictive, or the baffle system in the tube?

The baffle would be easy to eliminate, and still pull from the side vent.

 

Not sure we haven't done testing to see what is the main restrictive part. Really Need to but it's not an easy task and takes an extraordinary effort to do this testing.


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Did you guys find you had to add fuel on the bottom end with the UMP intake? I found I had to add a considerable amount on the bottom and pull a bit from the mid and top end on my setup. I have UMP, Alba stage 2 with 95mm big bore. Thx.

 

Yes we did. We let the auto tune make the adjustments on the bottom end but there was more fuel required with the UMP Plenum.


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Good to know. I'm building my intake now using a filter off my diesel drag truck, utilizing the ump intake plenum. I'll post results once done.

 

Will be interesting to see if you have same results between plenums. Are you going to test with stock then switch to UMP?


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I won't be testing the stock plenum, but from alba's tests we kinda know how it does. I do have a good baseline to go from on my fuel controller and wideband sensor, and that is on the complete ump setup. Here's some pics of my setup using the ump plenum. I will try and get out today to test.

 

What load factor did you use when dyno testing

 

No load. Dyno we use does not have eddy current on it.


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Running a load factor greatly changes the results,compared to free-wind....just my op...Does the UMP plenum have velocity stacks?

 

Please tell me how it changes the results with a load?

 

1.....it changes the fuel demand at any given RPM,thus changes in HP & TORQUE
2.....it shows the advantage or disadvantage of cams hp & torque at certain RPM
3......it,(most important to me) it shows the acceleration curve in real life situation
4..... it will show difference in air demands and results in air cleaners due to the above( You should know this)

5......I would go on,but it would get boring

 

The ump looks good

 

Poflo a load doesn't change the anything. Does even change the shape of the rpm curve. It will change the air fuel ratio but that's about it. I have a load cell my dyno. I have done lots of intake testing and never once seen a load change the results.

 

I understand and agree with what your saying. But intake testing, which i thought is what we were talking about, load really doesnt change anything. Trust me ive tried hundreds of combinations under load. Plus The filter that this gentleman here has, could go on a turbo charged 1000hp v8 and would have enough air flow demand to supply it. I understand air demands, harmonics have alot to do with also.

If you load test the stock intake and then you load test an aftermarket intake that makes 3 hp more. load test or free wheel, the aftermarket intake will still read 3 hp more on both tests.

 

The filter is plenty large enough.......but the piping & size will kill HP,thus changing the outcome.....if a motor cant get sufficient air,It loses hp.....I'll guarantee you that Alba's two pod filters will pull more air than the tube with big filter AND under a high demand & rpm ,loaded xp motor you will be able to tell the difference when dynoed or real time....just my personal .02 & experience from everything I' ve dynoed & built.....not just xp motors....plus ,why do you think they make load sensitive fuel controllers,if a motor under different loads didn't have demand changes.....same with air....air has to be more than sufficient at all times....sorry,I get carried away,I'm done

 

Poflo, what intake do you run?

 

I'm running a filter & velocity stack combo that I purposely built for the XP...It has a large custom made K&N filter with outer wear.Its a single filter w/ two holes that mount directly on the aluminum velocity stacks that mount directly to the throttle body.....may produce set-up in the future......Its not made for use in mud & water....sand or dirt only

 

When I installed my filter setup, I seen gains in my testing over the complete ump intake. I had to throw more weight in the clutch , 2 grams in each weight and it could have used a bit more. But I feel I'm not getting enough air thru the head. Stock head, Alba cams, and 95mm big bore. My air/fuel on the upper end is still pretty rich at 11.0 . I had my clutching dialed when I ran Alba's stage 1 setup, and so far with this setup I've added around 13.5 grams to the clutch, it just keeps wanting more. I am going to a ported head bigger valves and bigger cams. I would like to make the most of it.

I'm a little gun shy now. I started a thread on it, but found brass shavings in my first oil change, but the second oil change showed no shavings. I don't want to trash an expensive head.

 

Just wanted to state that the throttle bodies have roughly 3925 sq./mm cross section for the two combined and my intake tube roughly 4250 sq./mm. But I understand other things play into it as well.