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boost threshold query
Hi guys, I normally live in the 930 and 911 tech zone, but have a query that relates to the 964. I believe the 964T came with the K27-7006 turbo? If correct, and assuming the cam is the 964 and not a T version, what are the boost/rpm characteristics of this configuration. Onset at ? rpm, full boost at ? rpm.
Tried searching, but obviously not using right words - 'no matches' Thanks Alan
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83 SC, 82 930 (track) - Stock except for RarlyL8 race headers, RarlyL8 Zork, K27-7006, 22/28 T bars, 007 Fuel head, short 3&4 gears, NGK AFR, Greddy EBC (on the slippery slope), Wevo engine mounts, ERP rear camber adjust and mono balls, Tarret front monoball camber adjust, Elgin cams, 38mm ported heads, 964 IC. 380rwhp @ 0.8bar Apart from above, bone stock:-) |
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07-14-2016, 05:17 PM
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Join Date: Aug 2002
Location: OverlandPark KS (Kansas City)
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Alan,
The 964T came with the K27-7200. Also unless it has a X33 package then it used the same cam as the 930. On the 3.3 I would still use the SC grind. The larger intercooler with the cam and the turbo the car already has will respond very similar to a 930 with the same mods. If it has the cat removed and a good exhaust you will have 1bar at 26-2800 RPM. Also depends if you have headers. As many difference as the C2T had the motors are very similar in output and response.
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Stephen 94 3.6Turbo 6-speed AWD |
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07-15-2016, 08:02 AM
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Thanks Stephen. My original info sounds incorrect then. The 7200 sounds like a fast spooling turbo.
Just trying to get my 930 to spool quicker than 3800 rpm for max boost. And trying to figure where the issue is. Regards Alan
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83 SC, 82 930 (track) - Stock except for RarlyL8 race headers, RarlyL8 Zork, K27-7006, 22/28 T bars, 007 Fuel head, short 3&4 gears, NGK AFR, Greddy EBC (on the slippery slope), Wevo engine mounts, ERP rear camber adjust and mono balls, Tarret front monoball camber adjust, Elgin cams, 38mm ported heads, 964 IC. 380rwhp @ 0.8bar Apart from above, bone stock:-) |
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07-15-2016, 12:28 PM
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Join Date: Aug 2002
Location: OverlandPark KS (Kansas City)
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Yes, the 7200 is quicker than the 7006 for sure. If you are running a 3LDZ then the difference will be night and day. What cam are you running?
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Stephen 94 3.6Turbo 6-speed AWD |
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07-15-2016, 12:33 PM
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I have an Elgin cam - aka super SC. I think it is slightly more upper end than the SC, but less than the 964 grind.
The 3 LDZ is modified, altho I am not exactly sure how - internal housing machined out and slightly bigger compressor wheel I think. It used to hit 1 bar at 3500 on stock cam. Regards Alan
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83 SC, 82 930 (track) - Stock except for RarlyL8 race headers, RarlyL8 Zork, K27-7006, 22/28 T bars, 007 Fuel head, short 3&4 gears, NGK AFR, Greddy EBC (on the slippery slope), Wevo engine mounts, ERP rear camber adjust and mono balls, Tarret front monoball camber adjust, Elgin cams, 38mm ported heads, 964 IC. 380rwhp @ 0.8bar Apart from above, bone stock:-) |
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07-15-2016, 12:57 PM
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Join Date: Aug 2002
Location: OverlandPark KS (Kansas City)
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The SC Sport will be a little lower to kick in but as you stated faster than a 964. FWIW I have never seen a 3LDZ mod that I liked. None of them were good enough for me to recommend. I would highly recommend the 7200 for what you are trying to accomplish unless you are ok with a Garret. There are many options there but most will not just bolt right in.
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Stephen 94 3.6Turbo 6-speed AWD |
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07-15-2016, 01:01 PM
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Yes, the 7200 would sound ideal for track work. But I am limited to 'original' 930 turbos. Hence the modded 3LDZ, and now the 7006 (930S) turbo I am about to try. But it sounds like the SC might have been a better choice cam then the SC sport.
Regards Alan
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83 SC, 82 930 (track) - Stock except for RarlyL8 race headers, RarlyL8 Zork, K27-7006, 22/28 T bars, 007 Fuel head, short 3&4 gears, NGK AFR, Greddy EBC (on the slippery slope), Wevo engine mounts, ERP rear camber adjust and mono balls, Tarret front monoball camber adjust, Elgin cams, 38mm ported heads, 964 IC. 380rwhp @ 0.8bar Apart from above, bone stock:-) |
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07-15-2016, 02:25 PM
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Join Date: Aug 2002
Location: OverlandPark KS (Kansas City)
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The SC cams will drive the response lower on the curve. You can also time them to help even more. The 7006 will also stillbe an improvement. That is all we had back in the day
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Stephen 94 3.6Turbo 6-speed AWD |
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07-15-2016, 02:59 PM
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Thats where I am - 'back in the day'.
What change to the cam timing would help the boost response? More adv or retard? Regards Alan
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83 SC, 82 930 (track) - Stock except for RarlyL8 race headers, RarlyL8 Zork, K27-7006, 22/28 T bars, 007 Fuel head, short 3&4 gears, NGK AFR, Greddy EBC (on the slippery slope), Wevo engine mounts, ERP rear camber adjust and mono balls, Tarret front monoball camber adjust, Elgin cams, 38mm ported heads, 964 IC. 380rwhp @ 0.8bar Apart from above, bone stock:-) |
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07-15-2016, 05:37 PM
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