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Raceboy
Joined: 01 Mar 2004
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Location: Estonia, Europe
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morghen
Joined: 21 Jan 2005
Posts: 9102
Location: Romania
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 Posted: Sun Dec 14, 2014 5:49 pm Post subject: |
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This looks nice ! It is good news for my K26 931 
I wonder if they will do the same for the K27 so my red 924 can also spool up faster.
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Cedric
Joined: 27 Aug 2004
Posts: 2818
Location: Sweden
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| Posted: Sun Dec 14, 2014 6:32 pm Post subject: |
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Well, ive been thinking of doing something like this. I work together with an expert in wheel design. So ive been thinking if he could make a drop in billet wheel based on his knowledge, would be nice! I just need s spare 2664 wheel, which i don't have...
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1980 924 Turbo
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924-76
Joined: 05 Jun 2006
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Location: Ontario, Canada
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| Posted: Sun Dec 14, 2014 10:27 pm Post subject: |
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Excuse my limited knowledge of turbo, but would a faster spool up mean dying faster or would it hold up to the same top end.
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1976 924 N/A ROW SOLD
1980 931S
1981 931 Part car RIP |
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Shurick
Joined: 15 May 2005
Posts: 524
Location: Russia, Moscow.
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| Posted: Mon Dec 15, 2014 6:29 am Post subject: |
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| 924-76 wrote: | | Excuse my limited knowledge of turbo, but would a faster spool up mean dying faster or would it hold up to the same top end. |
Given a constant housings, spool up depends on inertia of compressor and turbine wheels. Efficiency and flow are dependent of compressor wheel design. So if you can make any particular compressor wheel lighter, this will improve spool up without any changes in flow characteristics.
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WBR, Shurick
'79 931 -- intercooled K26-3060-6.10 turbo @ 1.2 bar, EFI+EDIS, 951S brakes, stripped interior, 951 look.
'86 924S -- R.I.P.
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Joes924Racer
Joined: 03 Nov 2002
Posts: 11964
Location: Oregon, Denver Colorado native!
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| Posted: Mon Dec 15, 2014 4:42 pm Post subject: |
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Nice find way to go... That means thank you for the post.
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1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo. |
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morghen
Joined: 21 Jan 2005
Posts: 9102
Location: Romania
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| Posted: Mon Dec 15, 2014 4:50 pm Post subject: |
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| Cédric wrote: | | Well, ive been thinking of doing something like this. I work together with an expert in wheel design. So ive been thinking if he could make a drop in billet wheel based on his knowledge, would be nice! I just need s spare 2664 wheel, which i don't have... |
I can send you one, I think its a bit chipped but IIRC I have one.
I'll look for it.
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Joes924Racer
Joined: 03 Nov 2002
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Location: Oregon, Denver Colorado native!
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| Posted: Mon Dec 15, 2014 4:55 pm Post subject: |
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Mine is toast. Major holdup.
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1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo. |
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Cedric
Joined: 27 Aug 2004
Posts: 2818
Location: Sweden
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| Posted: Mon Dec 15, 2014 9:24 pm Post subject: |
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| morghen wrote: | | Cédric wrote: | | Well, ive been thinking of doing something like this. I work together with an expert in wheel design. So ive been thinking if he could make a drop in billet wheel based on his knowledge, would be nice! I just need s spare 2664 wheel, which i don't have... |
I can send you one, I think its a bit chipped but IIRC I have one.
I'll look for it. |
I will also check with gegge if he still have some stuff left..
I would need an intercooler first, its nice to have some collector if the compressor wheel goes blam, so all the alu debris doesnt crash the engine  But that is on the way
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morghen
Joined: 21 Jan 2005
Posts: 9102
Location: Romania
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| Posted: Tue Apr 14, 2015 4:55 pm Post subject: |
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I emailed this guy Kevin from ultimatemotorwerks about a K27 compressor wheel they make and sell. From his emails it seems to me he's one of those 911 snobs.
I asked if they can sell me a lighter K27 compressor wheel and i'd expect it to move the boost threshold down 200RPM.
He said that the K27 is not for a 2L and its meant for the 3.4 engines..aldough i explained i have a hybrid turbo with a smaller turbine.
If i'm stupid and i dont know what i'm talking about i would expect from him/them to send out a more elaborate answer..but he said the turbine controls the spoolup and i should look for a large frame K24 or a VW VNT diesel turbo.
Anyway, so no buying from them i guess.
Any other sources for billet compressor wheels?
Cédric, did you get that wheel? do you want me to send mine?
EDIT: oh, Chinese wheel:
http://www.ebay.com/itm/Turbo-Compressor-Billet-Wheel-Various-K27-billet-wheel-/121192301224
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Cedric
Joined: 27 Aug 2004
Posts: 2818
Location: Sweden
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| Posted: Tue Apr 14, 2015 8:46 pm Post subject: |
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I worke with turbo matching every day, not one day have i seen a compressor that knows how many cylinders or volume its connected to turbine is where the most of thr the spool up is dictated though. But a modern compressor would help performance in every way of course.
I didn't have the resources to measure the wheel profile. Though he said he could easily make me a wheel optimized for our cars flow profile if o just haf the dimensions. Cant you do imeasure it at work?
3k eur is the base setup cost for machining, which killed it a bit. Maybe maybe they could machine it at work for training purposes. But this is the hard part..
Im on parental leave for six months now (Sweden is a generous country) so i cant work with it for a while.
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1980 924 Turbo
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morghen
Joined: 21 Jan 2005
Posts: 9102
Location: Romania
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| Posted: Tue Apr 14, 2015 9:56 pm Post subject: |
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I can 3D scan it with a stereoscopic measuring device.
I dont know how to operate it but i can learn.
Do you have access to a turbo part numbers data base? i'm looking for the specs of my current wheel and i dont know its part number, i only know the part number of the turbo.
btw, do you still use the email mentioned on your profile page?
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Fasteddie313
Joined: 29 Sep 2013
Posts: 2595
Location: MI
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jason c
Joined: 13 Jan 2014
Posts: 1018
Location: Nwi
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| Posted: Wed Apr 15, 2015 1:47 pm Post subject: |
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| Fasteddie313 wrote: | | http://www.henzolturboparts.com/turbopartcatalog/kc.pdf |
Page 101 |
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Fasteddie313
Joined: 29 Sep 2013
Posts: 2595
Location: MI
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| Posted: Wed Apr 15, 2015 4:43 pm Post subject: |
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ROW S1 on page 121, US S1 on pg 109, gts on 122...
Cédric -
You're looking for the compressor wheel dimensions for which specific turbo?
I think I have some compressor wheel blueprint drawings..
I bought an audi k26 in great shape for $100 to get a 2664 (5326-123-2035) CW and a spare turbine wheel/shaft both the same parts as the US 931 s1 turbo but all different housings...
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924 FAQ (Technical)
