|
|
|
|
|
|||||||
 |
|
|
LinkBack | Thread Tools | Rate Thread |
| Author |
|
|
Me like track days
Join Date: Sep 2003
Location: Kirkland, WA
Posts: 10,196
|
Stephen aka Porsche PHD - Your take on the boost/CR balance?
__________________
- Craig 3.4L, SC heads, 964 cams, B&B headers, K27 HF ZC turbo, Ruf IC. WUR & RPM switch, IA fuel head, Zork, G50/50 5 speed. 438 RWHP / 413 RWTQ - "930 is the wild slut you sleep with who tries to kill you every time you "get it on" - Quote by Gabe Movie: 930 on the dyno |
||
11-05-2006, 09:47 AM
|
|
|
Registered User
Join Date: Mar 2002
Posts: 3,563
|
IMO, if you're going to be tracking the car, where it sees high loads and sustained max boost levels, I think you're safer sticking with low C/R and moderate boost levels.
I'm sure Stephen will chime in with a more technical and scientific response though 
__________________
Merv '89 911 Turbo Cab Protomotive MAP ECU, Twin Plugged Heads, GT2-EVO CAMs, 3.3L fully finned P&C's, ARP fasteners, C2T head gaskets, Titanium Retainers, Turbo spec valves, springs & guides, 964 splash valves, GT35R BB turbo, GSF Stainless Headers, Magnaflow Exhaust, Full bay Intercooler, TiAL 46mm w/gate, TiAL 50mm BOV, Apexi AVC-R EBC, SPEC Stage3+ Clutch kit, Crane CDI Ignition 
|
||
|
11-05-2006, 07:18 PM
|
|
|
Registered User
Join Date: Jan 2003
Location: Burlington, Wisconsin
Posts: 9,502
|
I wanted a bit higher CR so that off boost it was very streetable and I don't intand on tracking the car so this was what I went with.. A couple of folks using the BAE kits on their SCs with low boost and love it because it is very linear acceleration.. But for a monster turbo motor less CR is better and safer
it all depends on street or track applications
__________________
Ben 914-6 2.4s GT tribute. 914-6werkshop.com manufacturer of 914-6, GT, Conversion parts |
||
|
11-07-2006, 06:11 AM
|
|
|
Registered User
Join Date: Jan 2003
Location: Burlington, Wisconsin
Posts: 9,502
|
look at the CR of this car
__________________
Ben 914-6 2.4s GT tribute. 914-6werkshop.com manufacturer of 914-6, GT, Conversion parts |
||
|
11-07-2006, 06:16 AM
|
|
|
Registered User
|
I am trying out 9:1 CR on a 3.8ltr TT motor that is in the works. The plan is to limit boost to 0.7 bar - no lag, quick spool. The hope that this is a nice streetable tyre burner with quick acceleration. I am not planning to race the car, so i dont need high end HP. (where i drive i rarely get the car in 5th gear). But, if i decide to track the car (DE etc), i intend to run 100octane and crank the boost a couple of notches.
This was all under the recommendation of my builder who has build porsche race cars for several teams (incl. some that raced at daytona).
__________________
Mike. 89 930 Turbo Cab.(soon for sale) |
||
|
11-07-2006, 07:10 AM
|
|
|
Registered User
Join Date: Nov 2006
Location: sterling, ohio
Posts: 18
|
I am running a 1986 3.3 turbo with 8.0 to 1 cr euro fuel system powerhaus stage 2 tubo kolken ic 964 cams and extensive head work completed the engine about 2 years ago and the power gained in the low end was unbelievable. I have no detonation problems and has been worry free. Also running with 1.0 bar spring so it can be done with a lot of tuning.
1986 Porsche 930 Strosek Last edited by stephenshane237; 11-09-2006 at 03:49 PM.. |
||
|
11-09-2006, 03:47 PM
|
|
|
|
| Thread Tools | |
| Rate This Thread | |
|
|
