Pushing an MP62 to the limits...
Hypothetical question:
Assuming a stock '99 head and valvetrain and a more-or-less ideal exhaust system, what is the highest boost / HP that an MP62 could reasonably be expected to support, within the constraints of blower speed & efficiency? |
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Not enough.
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C'mon Joe, just say no to huffing. Snails are faster.
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Joe Perez thinking of supercharging? :eek5:
What is this world coming to? |
Perhaps you should speak to Mr. Whipplecharger.
http://www.meganandjack.com/mt/archi...%20Whipple.jpg |
Big gulp was pushing over 300whp.
A turbine would likely be cheaper to get there though |
I'd be curious to see how one did with WI sprayed directly onto the lobes. I don't think I've never heard of it actually being done just in a book.
You gonna prototype for BEGI's new system? Chris |
I've got 3gph of WI going through the throttle body into the blower and another 3gph at the outlet. No problems so far and the blower is significantly cooler relative to the valve cover. Pre-WI the blower was hotter than the valve cover.
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Originally Posted by y8s
(Post 435916)
Perhaps you should speak to Mr. Whipplecharger.
http://www.meganandjack.com/mt/archi...%20Whipple.jpg Big Gulp made 340hp on his: http://biggulp.home.att.net/BigGulp21PSI.jpg Big Gulp dyno The latest specs
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Originally Posted by Miatamaniac92
(Post 436053)
I'd be curious to see how one did with WI sprayed directly onto the lobes. I don't think I've never heard of it actually being done just in a book.
You gonna prototype for BEGI's new system? Chris One with an MP62 and others with a 45. Supposedly it helps seal the rotors better. I intend to do it myself at some point... |
Originally Posted by richyvrlimited
(Post 436160)
Quite a few people doing that very thing on nutz
One with an MP62 and others with a 45. Supposedly it helps seal the rotors better. I intend to do it myself at some point... Experimented with WI pre SC before installing the IC. Couldn't tell any difference and the EMU datalogs showed no boost gain at all down to 0.0 of a psi. |
Originally Posted by richyvrlimited
(Post 436160)
Quite a few people doing that very thing on nutz
One with an MP62 and others with a 45. Supposedly it helps seal the rotors better. I intend to do it myself at some point... Any wear/reliability problems so far? How do they determine the WI limitations? Do they use straight water or combo? What kind of TRACK IATs are they seeing? Chris |
Got a single 3mm nozzle pre s/c, 70/30 water /meth mix
TDR A/A I/C Now running 8 psi boost max M45 Track figs Pre I/C temps 250degF Post I/C 80degF I,ll likely be down in Austin late Sept...........if ya wanna grab a beer.. |
Originally Posted by Miatamaniac92
(Post 436053)
I'd be curious to see how one did with WI sprayed directly onto the lobes. I don't think I've never heard of it actually being done just in a book.
You gonna prototype for BEGI's new system? Chris |
Originally Posted by rockdoc
(Post 436224)
Got a single 3mm nozzle pre s/c, 70/30 water /meth mix
TDR A/A I/C Now running 8 psi boost max M45 Track figs Pre I/C temps 250degF Post I/C 80degF I,ll likely be down in Austin late Sept...........if ya wanna grab a beer.. Chris |
Originally Posted by Miatamaniac92
(Post 437310)
Sure, shoot me a PM. I met you at MSR right?
Chris Thats right.-i forget/dont know everyones handles on here |
Originally Posted by rockdoc
(Post 437862)
Thats right.-i forget/dont know everyones handles on here
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Originally Posted by Braineack
(Post 436061)
Big Gulp made 340hp on his:
Big Gulp dyno The latest specs
Anyone know his blower speed or pulley ratios? Thanks Brain for the info. What a shame the project is no longer updated. |
this is what he says about it:
When we started to tweak Big Gulp, we started with 2 pulleys. We ran the larger pulley non-intercooled and then the second smaller one once the IC system was in place. Once the car was running with no problems, we cut the larger pulley down to a size slightly smaller than the 2nd pulley. This continued until 21 PSI was reached without any problems. The advantage of this method is that with only 2 actual pulleys, if we went too far, we could always drop back a step until the problem was found and corrected. |
Originally Posted by 99mx5
(Post 437274)
Its been done before, A guy by the name Jean in Canada tracked his BRP kit and posted that no blower will survive sustained use unless its cooled. He cooled his with WI pre-blower. I believe him because I toasted mine after a year of track racing. I pulled my kit after realizing that I would have to replace it yearly due to the heat of track racing. Beware that Magnusson voids blower warranty if anything is injected into it.
I'd have to see what I could find... to confirm.... I've been tracking mine without any issues, however, I've also still running low boost at this point.... (so no where near joe's requested HP numbers).... I will say that the header blanket does make a difference to how the blower does though.... also making sure the by-pass valve is working. Anything I can see to help keep the heat down in the blower would probably increase life..... Dave, |
Originally Posted by steelrat
(Post 438844)
I will say that the header blanket does make a difference to how the blower does though.... also making sure the by-pass valve is working. Anything I can see to help keep the heat down in the blower would probably increase life.....
And vacuum bypass valves work both ways. Well, the butterfly section does, anyway. Opens up some interesting possabilities if you think about it. |
Originally Posted by Joe Perez
(Post 439843)
Header blankets are for hotsides. We'll have none of that.
And vacuum bypass valves work both ways. Well, the butterfly section does, anyway. Opens up some interesting possabilities if you think about it. What are you thinkin' about the bypass valves....? Dave |
Originally Posted by steelrat
(Post 440839)
There's nothing wrong with hotsides Joe. <G>
What are you thinkin' about the bypass valves....? |
Mmm twincharged goforit Joe I'll be green with envy :)
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Originally Posted by Joe Perez
(Post 440897)
That it can be used to bypass the supercharger under conditions other than idle and light cruise.
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Originally Posted by Joe Perez
(Post 440897)
Yes, there is. They needlessly occupy valuable space that could be put to better use.
That it can be used to bypass the supercharger under conditions other than idle and light cruise. Sure sounds like a "twin" charge. <G> Yeah, you can.... I think that's what was happening with Jay's car with the cold-fusion setup. <G> By-pass is also good for fuel encomny. <G> Dave, |
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