Increasing Magnum pump setup

[snowxr]

Need to get one of these

http://www.watcon.com/Catalog_Pages/Impeller_Pitch.htm

Pitch it yourself for fine tuning.

I have a set, and they're helpful for comparing props, and a good guild when having props re-pitched. But don't think having the guage will make it any easier to pitch your own props. That takes skill, and high dollar tools.

 

[rollin5150]

I have a set, and they're helpful for comparing props, and a good guild when having props re-pitched. But don't think having the guage will make it any easier to pitch your own props. That takes skill, and high dollar tools.

It works well for slight changes. The guys on greenhulk use this to fine tune pumps/props

 

[CARBONX2]

Running the 144mm at the moment, need to put new seals and bearings in the 146mm. Couldn't believe the difference going from 84mm to 83mm exit nozzle, still going to try 82mm.

 

[Matt_E]

Couldn't believe the difference going from 84mm to 83mm exit nozzle, still going to try 82mm

I recently went through trying an 84mm and an 82.6mm nozzle on my 140 Mag.
Very noticeable difference, the smaller nozzle kept pulling everywhere when the 84mm gave up.

 

[Waternut]

Seems like slight changes in a mag pump make massive differences while a slight change in a regular pump make slight differences.

I'm not trying to knock mag pumps at all and I'd like to get one but they seem really hocus pocus to me. Not only can users and engine builders not decide on even remotely similar sized pumps (one says 140mm and another says 148mm) but it also seems like the only way to really know you're getting the most out of your pump is to test every nozzle size with every prop pitch with every pump cone size. I may be able to afford a $1000-$1500 pump and prop but then it sounds like I'd need another $500-$1000 worth of spare parts to find the right combination based solely on seat of the pants feel. Kinda like trying to guess a suitcase combination... 1,1,1...nope...1,1,2...maybe...1,1,3...maybe...1,3,2...maybe...and so on.

 

[Matt_E]

It pays to work with a builder you trust to dial in the whole setup without you having to go through $500-$1000 worth of spare parts. Because the competent builder has already done all that.

 

[jetski9010]

Seems like slight changes in a mag pump make massive differences while a slight change in a regular pump make slight differences.

I'm not trying to knock mag pumps at all and I'd like to get one but they seem really hocus pocus to me. Not only can users and engine builders not decide on even remotely similar sized pumps (one says 140mm and another says 148mm) but it also seems like the only way to really know you're getting the most out of your pump is to test every nozzle size with every prop pitch with every pump cone size. I may be able to afford a $1000-$1500 pump and prop but then it sounds like I'd need another $500-$1000 worth of spare parts to find the right combination based solely on seat of the pants feel. Kinda like trying to guess a suitcase combination... 1,1,1...nope...1,1,2...maybe...1,1,3...maybe...1,3,2...maybe...and so on.

If you buy a already tried and true engine from an engine building like the x metal 865 or a jetworks 4mm BB stroker, the engine builders have more then likely tried all the setups all ready and can give you spot on specs if you want to go with a mag pump. Another big reason its a huge + to stay with the same engine builder for everything in your setup.

 

[Waternut]

If you buy a already tried and true engine from an engine building like the x metal 865 or a jetworks 4mm BB stroker, the engine builders have more then likely tried all the setups all ready and can give you spot on specs if you want to go with a mag pump. Another big reason its a huge + to stay with the same engine builder for everything in your setup.

Makes you wonder about the real advantages of a mag pump over the TBM pump cones for even some of the nice engines when the recommendation for the xmetal 865 is a TBM pump cone... Just saying since I wouldn't consider those guys to half arse anything. Maybe they're just trying to keep the costs down though. :dunno:

 

[Matt_E]

I've tried both on similar motors. The mag pump won hands-down.
Just my experience.

Disclaimer: I don't know if the pump setup with the TBM cone was optimal or not. I know my mag pump is.

 

[OCD Solutions]

Makes you wonder about the real advantages of a mag pump over the TBM pump cones for even some of the nice engines when the recommendation for the xmetal 865 is a TBM pump cone... Just saying since I wouldn't consider those guys to half arse anything. Maybe they're just trying to keep the costs down though. :dunno:

I have had the same thought floating around in my head the last few weeks. It seems that more and more guys are trying the mag setups over the TBM and Skat impeller and claiming a night and day difference. So why does X-scream still recommend the TBM?

I think X-Scream promotes the TBM with their SS865 package because the added expense of a Mag pump may deter a fair amount of people from buying it in the first place. The TBM works well with a stock pump at a fraction of the cost and will continue to do so until an upgrade can be afforded.

One of X-Scream's objectives with their new engine package was to make Big Power as affordable as possible so more people can buy it. It's a great all around package with upgrade options to fit just about everyones budget.