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Registered
Join Date: Jun 2003
Location: Long Island
Posts: 400
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Nitrous
Any body have any thoughts of putting NO2 on a 3.2 Stock motor ?? Just picked up an 89 with low miles and was contemplating this or a turbo set up or a supercharger.
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2012 XC90- wifey 2011 BMW 535I -Daily Driver 911/964 Widebody Cabriolet-Protosport Stage 1.5 Turbo |
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03-12-2005, 04:50 AM
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Back in the saddle again
Join Date: Oct 2001
Location: Central TX west of Houston
Posts: 55,985
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Go for the turbo or the supercharger. Nitrous has been done on some 911's, but there's generally much more research and time on the other two so they are bolt on systems that shouldn't affect reliability.
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Steve '08 Boxster RS60 Spyder #0099/1960 - never named a car before, but this is Charlotte. '88 targa  SOLD 2004 - gone but not forgotten
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03-12-2005, 05:32 AM
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Join Date: Apr 2003
Location: Terre Haute, IN
Posts: 2,949
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TURBO SET UP!
Next, I have nitrous in my garage for engines designed for it. Yes, there are guys who have ran it on 911's. There is a reason that the manufactors make 944 kits but no 911 kits. We have engines that are both quite expensive and thermally challenged. Big bores where detonation can be an issue. IF you are conservative (but at which point, what is the point) on the nitrous jets, have proper fuel supply, progressive control for solenoids, have timing retard for nitrous use, are secure in your injection method and equal flow, keep the AF ratio on the right side, and have $$ to rebuild when you lift a head or burn a piston and cylinder then by all means GO for it. Remember a good domestic engine will cost as much to build up as a Porsche boxster, but they are often much cheaper to repair.
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Luke S. 72 RS spirit 2.7mfi, 73 3.2 Hotrod on steelies, 76 993 3.3efi TT, 86 trackrat, 91 C4s widebody,02 OLA winning 6GT2, 07 997TT, 72 914 v8,03 900 rwhp 996TT |
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03-12-2005, 05:43 AM
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Registered
Join Date: Jan 2005
Location: Minneapolis
Posts: 7,482
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Nitrous vs turbo/super:
Less expensive Lighter weight Easier to pass emissions or remove for visual There is a lot of misconceptions about running nitrous. If it is done right, it is no more 'dangerous' than any other type of forced induction. Remember that nitrous oxide also has cooling properties inherent in the nitrogen/oxygen split that dramatically lower temperature, where forced induction (esp turbos) RAISE charge temps. Look at the reasons you are doing a power adder and it will lead you to the right solution. Nitrous is really only useful in short bursts, like drag racing. Superchargers make power more immediately, with better throttle response and torque. Turbos are more efficient, but have lag and heat issues to deal with. Porsche picked turbocharging, but NO manufacturer has (or can) pick nitrous. The Germans 'invented' nitrous injection with the Luftwaffe. A 'wet-plate' nitrous set up would work well on the '89. It would bolt to the throttle body and have its own fuel injector to compensate. Address the fuel system (pump, lines, filter) so it can provide the extra fuel. Modifiying an existing plate-type system to work on the Porsche wouldn't be too hard, and should be reliable in short bursts (5-10 secs) at 100hp levels. The 3.2 crank is bullet proof, and can easily take a 100+ hp 'hit' of juice. The rods should be fine too....it is only the rod bolts at high rpm. Start asking vendors and manufacturers for advice. There are a lot of good companies out there. Nitrous Oxide Systems (NOS) which is the biggest (now owned by Holley), Barry Grant's Nitrous Works , Nitrous Express, and Nitrous Supply (owned by NOS founder Mike Thermos), and Zex (owned by Comp Cams). E |
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03-12-2005, 09:03 AM
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Registered
Join Date: Jan 2005
Location: Minneapolis
Posts: 7,482
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By the way, doesn't your '89 964 C4 have a 3.6L? Or are you talking about the Cabrio?
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03-12-2005, 09:04 AM
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Too big to fail
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Since you're considering Nawwws, the chef also recommends...
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"You go to the track with the Porsche you have, not the Porsche you wish you had." '03 E46 M3 '57 356A Various VWs |
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03-12-2005, 09:09 AM
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Join Date: Jan 2005
Location: Minneapolis
Posts: 7,482
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We laugh, but that modified Skyline from 2Fast 2Furious could probably wax a 3.6L lightweight 911 on any street course. Even without nawwws. Not stirring it..... just fact. You couldn't get me to drive it looking like that. But with stock body/paint and no neon.......
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03-12-2005, 10:59 AM
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Registered
Join Date: Jan 2003
Location: Langley,B.C.
Posts: 12,000
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I always thought people would NOS for a while and then the bottle would sit in their trunk empty for years. Kinda like a Colecovision or Atari, it probably is fun for a while....
Jeff
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Turn3 Autosport- Full Service and Race Prep www.turn3autosport.com 997 S 4.0, Cayman S 3.8, Cayenne Turbo, Macan Turbo, 69 911, Mini R53 JCW , RADICAL SR3 |
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03-12-2005, 11:34 AM
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Registered
Join Date: Aug 2003
Location: BC Canada
Posts: 222
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Kaisen pretty much sums up what I was going to say…
I think if you get a wet nitrous kit with all the safety features (RPM nitrous control, low fuel pressure cut out, ignition retard & purge) it is reasonable safe to use. 100hp from Nitrous, turbo or SC produce the same internal mechanical stress, thermal stress (nitrous is a little cooler) so they should all case the same amount of wear & tear. But if you cheap out with a dry nitrous system you’ll fry your engine in no time… A search under my name and nitrous should come up with pictures of a my fogger system plumbed in under my Webbers on a 3.0 |
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03-12-2005, 01:36 PM
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