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Re: LPT questions, (timing, air/oil separator, injectors) Posted by JustinHiFi [Email] ![]() ![]() In Reply to: LPT questions, (timing, air/oil separator, injectors), nt moore, Fri, 30 Jul 2004 06:37:08 Members do not see ads below this line. - Help Keep This Site Online - Signup |
NT-
Sorry I did not see this on the P BB, or I would have helped you out! I did a LPT setup on my '91 900S w/ 2.4.2 a year ago, and have fallen for the car all over again ;-) Thought I needed to buy a turbo for what I wanted, and now I beat stock T and SPGs up to about 70ish, its pure wonderful.
(1) I have '88 900 S, Do I need to find a set of turbo injectors or are standard injectors ok. What are ramifications of not replacing injectors?
As for injectors, find a set of good turbo injectors. The turbo ones will allow more fuel flow. Also, the S will have a 3.0 FPR...you can keep that with the turbo injectors, or go to a stock turbo 2.5. However, I felt that I wanted to be sure that I was not lacking fuel, so I got a good used 2.5 RRFPR from Swedish Dynamics. It keeps the MPG a bit higher than the 3.0 did.
(2) For conservative LPT setup how should timing be set. I don't yet have a handle on the theory of timing/advance/cams etc. Can anyone recommend a book that explains this sort of tuning?
Well this is one area that I did not fully get into since I have the non adjustable 2.4.2 system. This system is totally self monitoring, and uses the crank sensor for pickup, not a hall effect in the distributor. I would keep the S cams, as mine have proven to do very well.
(3) in Upbia's LPT directions the suggestion is made to manufacture an air-oil separator. I don't understand yet why this is necessary. Explainations?
Its not at all. This device (I have one for sale FYI) from what I understand is used on high power, high boost applications which keeps the oil from the crankcase from venting directly into the intake, thus lowering octane. On mine, I simply removed the vent lines, and capped the breather. Its not absolutly needed at all.
Shoot me an email or sucuh if you need some more help. Also, I would reccomend that you go with a Mitsu TD-05, if you can find one. The T-3s get into boost above 3k, where I hit 8psi (at) 2100 rpm with my TE05...food for thought. Also, boost gauge and PREMIUM FUEL ONLY (ALWAYS) are needed.
Car started from just a stock S...now has Intrax, Koni, swaybars, Aero wheels, Aero seats, turbo system, SPG kit, H4 E-Codes, etc etc etc ;-)
JustinHiFi
http://saabpics.org:3000/gallery/1991-900-S-LPT-Black
posted by 68.223.147...
_______________________________________ JustinHiFi Strictly Saab Inc. Melbourne, FL Current: -1991 900 S-PG MT -2001 9-5 Wagon AT -2006 9-3 SS AT Past: -1964 96 2-Smoke MT -1967 96 v4 MT -1983 900 Turbo MT -1985 900 SPG MT -1988 9000 Turbo Black MT -1988 9000 Turbo White AT -1990 900 SPG Red MT -1990 900 SPG Black MT -1991 9000 Turbo MT -1991 900 SPG Red MT -1992 9000 Griffin AT -2000 9-5 Aero Sedan MT -2001 9-5 Aero Wagon MT -2008 9-3 2.0T Sedan AT
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