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question
I'm waiting to install a bigger turbo but have to solve my vibration issue first...
I did install new headers and muffler together with 964 cams. When I'm accelerating with this setup power comes in late (5000 rpm) Is this normal having this setup with my stock inter cooler and turbo? when my vibrating issue is solved I get a bigger turbo from Chris Carrol... |
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You mean you get full boost at 5000 rpm? That is not normal! I do not know what turbo you have but full boost should be around 3500 rpm or earlier.
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MikeD '87 930 |
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Quote:
I feel boost coming in at +- 4000 rpm but it feels like a huge punch at 5000 RPM. The car then pulls pretty good. I thought because the new cams letting more air true the valves causing turbo getting out of breath? or is there another issue? What's you opinion? |
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Chain fence eating turbo
Join Date: Dec 2008
Location: Austin, TX
Posts: 9,195
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Wonder if you're pig rich pre-5k RPM? It leans then picks up big power?
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Join Date: May 2008
Posts: 1,144
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I'm full boost at around 3,500 also.
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'87, Modified WUR, Billet valve, 965 downpipe, Kokeln intercooler, GHL headers, Garrett T04B K27 hybrid, Tial w/.8 bar, WEGO IV, RarlyL8 dual out, LSD |
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What cam timing did you adjusted? 1.26mm would be a good point to start. Stock timing does not work with this cams for sure.
Ignition timing is another factor with big influence. Do a search for both here, a lot of threads concerning both
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Roland 930 Turbo '81 Too many modifications to list |
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Quote:
Important to have correct cam timing.
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Trond R. 1979 930: Garret GT35r turbo, EFI, carerra intake, Link EMS, custom GT2 cams, 98mm JE P/C, 964 crank (stroker), custom valves & ported (XtremeCylinderHeads) etc..etc.. 1972 914-6 GT replica project 1986 944 Turbo |
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