RE: 5ktqw Low End Power

["Lewis, Gary M" <Gary.Lewis@West.Boeing.com>]

Todd said,


> Hmmm,
>     I believe the K24 is less suspect to overspinning.  It will spin
> faster easier
> but it can handle a lot more.  
> 
Todd and I have kicked this one around for a while.  I think the K26 will
ultimately handle more power, he thinks the K24 will.  Since neither of us
are turbo experts (esp. me), I have attached part of a Ned Ritchie post.
************************************
You can push them a little for street use, but at a track stick with proven
sizing with matched computers and other parts.

Did you know the 4 numbers after the K?? number
give the inducer and exducer sizes?

300 hp K26 2664 CA  6.95 (5000/200 stock)
265 hp K24 2470 GGA (the stock one)[I push to 277]
285 hp K24 2670 GGA (an early prototype)
300 hp K24 2672 GGC (here starts the RS2 family)
310 hp K24 2672 GGC
320 hp K24 2672 GGC
350 hp K24 2672 GGA 10.11 (S2 Rally)
410 hp K26 3072 GD
??? hp K26 3270 GXA (Not very efficient)
450 hp K26 3472 HD
??? hp K27 3470 MNA 9.11 (Pikes Peak)
***************************
After reading this, I was convinced the K26 was a "larger" turbo.  His chart
tells me you can squeeze more power from a stock K26 on a 10vt than a stock
K24 on a 20vt.  That being said, I believe that a K24 is a great addition to
a pre-Mac-14 turbo running less than 2.0 bar.  Based on help from Scott J.,
I am going to try a single pass IC first.  He thinks that this may negate
the need for a K24 turbo, as I may be happy with the spool-up of the K26
afterword.  I think Gross Scruggs is in the process of doing this, so if he
gets his done first, maybe we can get a report.  If the single pass IC
doesn't get it, I'm thinking K24, or if I go to 2.0 bar, RS2
turbo($$$ouch$$$).

Gary Lewis 
88 5kcstq 1.8 bar 108km Pearl w/Fuchs
86 5Kcst 5sp 1.4 Bar 202km Sapphire
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