[flash]

i won't really know what happens until i test it, but i expect the torque curve to go up proportionally.

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[flash]

just so that people don't worry about cooking the supercharger, i wanted to assure everyone that i will not be increasing boost, nor spinning the unit any faster. the adiabatic efficiency will not change.



on that subject, a lot of nonsense has been tossed around lately about adiabatic efficiency, and has included some slagging of the rotrex. i thought i would set the record straight. the unit we use is capable of 80% efficiency, and we are staying well into the comfortable zone. i have yet to see any data for the raptor, other than an unsubstantiated claim of 85% from somebody who clearly has not been able to put the kit together successfully. i have searched but cannot find anything, and given that it is air cooled, i tend to think it is hooey.



here is the chart for the rotrex.



   

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[Eric_Oz_S2]

Now what forum have you been trolling..... <img src="/forum/images/smilies/968/smile.png" class="smilie" alt="" /> ?

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[flash]

roflmao - yeah - i figured you would enjoy that

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[mrmister]

Count me in.



Any updates?

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[flash]

lol - you'll be the first to know.



supposedly my engine is going back together this weekend, which means there is a chance i will be firing it up at the end of the week. once it is back here, i get going on this.



i'll be ringing you up.

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[Eric_Oz_S2]

Engine still apart?

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[flash]

barely. waiting on a couple of small parts the ended up needing to be replaced. really annoying insignificant parts, but needed nonetheless. should be finished the beginning of next week.

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[Lear35A]

[quote name='flash' timestamp='1339069294' post='127871']

barely. waiting on a couple of small parts the ended up needing to be replaced. really annoying insignificant parts, but needed nonetheless. should be finished the beginning of next week.

[/quote]

I feel your pain.

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[flash]

lol - yeah - turns out my waterpump was garbage after only 25k miles. bearing sounded horrible and there was quite a bit of play in the shaft. it was a laso. i won't be buying another one of those.



the studs that hold the tensioner on were also not in great shape.



pump arrives today. studs tomorrow. the rest of the engine is done.

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[tamathumper]

Good feedback on the pump! Mine is a Laso right now, with 5K on it. So far so good, but that's not an item to save money on!

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[flash]

apparently this is a common issue with laso. the 928 guys had an even worse experience with that brand. theirs used to dig into the block until laso changed the design. seems they haven't fixed the 968 one, or at least not at the time i got mine.



i ordered a genuine porsche pump - new. as it turned out, it was actually less expensive than a laso.

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[mbardeen]

Really? *sigh*. I just put a Laso on mine as well. It had a metal impeller on it, but it didn't look to be the same design as the one that was digging into the block. IIRC, that one had exposed impeller fins. This looked like the original plastic impeller, just made out of metal.







Not a big deal I suppose, since I'll probably pull the engine in about two couple years for oil leak repairs and general clean up. If it's bad, I'll replace it again with a genuine porsche part.

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[flash]

that is exactly the pump i had in there

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[mbardeen]

I wasn't real happy with the casting process on that pump, I had to file a couple bits off on the mating surface to ensure a proper fit. Did you get your Porsche pump from Sunset?

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[flash]

actually got it from pelican.

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[Eric_Oz_S2]

I'm going to move this to the "Engine" forum where it belongs. Oh, wait that's Flash's Job <img src="/forum/images/smilies/968/tongue.png" class="smilie" alt="" />

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[flash]

lol - nice



yeah - we'll get back on topic now



closing in on engine completion, which means i can then get back on to the kit. i don't see why i won't have the car back at the end of next week.

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[Eric_Oz_S2]

Any news - I guess you have run out of time?

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[flash]

lol - ran into all sorts of little problems. all done now. i think the motor goes back in today. then next week i bolt the SC back on and hang the exhaust and away we go.

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