hey 944na owners interested in superchargers, read this
08-19-2001, 06:44 PM
#46
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Originally posted by 951carter:
<STRONG>4-5 psi is not going to give you as much horsepower as the 951's stock 12 psi. </STRONG>
<STRONG>4-5 psi is not going to give you as much horsepower as the 951's stock 12 psi. </STRONG>
08-19-2001, 07:10 PM
#47
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I want a supercharger for my 85.5 na!
I live in the LA area and you can use my car to test it.
I want to try to get 300HP. Possible?
Voice Mail/Pager 805 675 7820
I live in the LA area and you can use my car to test it.
I want to try to get 300HP. Possible?
Voice Mail/Pager 805 675 7820
08-19-2001, 07:12 PM
#48
Race Car
Never heard that one before, I'll have to keep it in mind. The thing to remember either way is how the added air/fuel supplied by the supercharger (including turbine-driven superchargers [or turbochargers as they've come to be known]) reacts to the existing compression ratio. If you are going to run 12 or 15 lbs of boost, a low CR like is found in the 951 (8:1) is the safest way to go. If, on the other hand, you already have a higher compression ratio (9.3:1 to 11:1 depending on model. Tabor, where's that chart?) less boost will yield results similar to an engine that has less compression but more boost. No matter what combo you choose one thing stays the same, too much boost together with too much compression leads to a volume of air being squeezed into too small a space. This results in the excess pressure finding its own way out. Headgasket anyone??
08-19-2001, 08:38 PM
#50
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Originally posted by Tabor Kelly:
<STRONG>
The rule of thumb for supercharging is that x psi will give you as much power as 2x psi will on a turbo. So to get the same affect as a turbo running 12psi of boost, you will need 6psi of boost. 6 psi of boost should not be a problem for a 83-86 844.</STRONG>
<STRONG>
The rule of thumb for supercharging is that x psi will give you as much power as 2x psi will on a turbo. So to get the same affect as a turbo running 12psi of boost, you will need 6psi of boost. 6 psi of boost should not be a problem for a 83-86 844.</STRONG>
By the way.. less compression allows you to run more boost at a ratio that allows more power overall from the increased boost (I don't remember the formula). Only reason you don't see cars with 5:1 compression is they would be undrivable below the boost threshold..
08-19-2001, 08:58 PM
#51
08-19-2001, 10:19 PM
#52
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I get that from people who have turboed and supercharged thier Integra Type-Rs.
Look at it this way. Huntley gets 340hp out of a 968 engine with a super charger. Try to get that with turbo running at 6psi.
Look at it this way. Huntley gets 340hp out of a 968 engine with a super charger. Try to get that with turbo running at 6psi.
08-19-2001, 10:35 PM
#53
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That's not really relevant.. apples vs oranges. Take two identical engines, supercharge one at 6psi and turbocharger the other at 6psi and the turbocharged one will make more torque, period. How much HP one will make vs the other is a factor of sizing the turbine/compressor/etc. Both are torque adders and will only add HP if they add torque at higher RPMs. If the turbocharger is sized properly for higher RPMs, it will make more HP than the supercharger as well. You should read the comments in the link posted by booster. There's a lot of other info out there that will say the same thing.. in fact I've never heard anyone try to argue that superchargers made more power for a given boost pressure. Usually the supercharger arguments stem from the lack of lag and/or lower boost thresholds.
04-03-2002, 05:43 PM
#55
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count me in! i have an '83 944 and i'm definatly interested even if i have to send my ECM off. just keep me updated! i'd def. go with the optional intercooler too. -Brett
04-18-2002, 11:47 PM
#57
Jane Bond 007
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Hi
I'm new to this, but I've been reading this thread with great interest. I'm looking to do some work on my 944...this looks good. Any updates?
I'm new to this, but I've been reading this thread with great interest. I'm looking to do some work on my 944...this looks good. Any updates?
04-19-2002, 07:50 AM
#58
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I spoke to the guys as F.A.S.T about 10 days ago and they told me the kit should hit the market around Mid June to late July. They expect it to product HP equivelant to the standard 944 Turbo and not more becuase anything else will cause excess stress on the clutch and other components. Hold tight and those of us who have N/A's will have something to look forward to this summer. Cost should be around $2500 or so and the best part is no lag. I'll keep you posted as he sends me info on their progress.
James <img src="graemlins/beerchug.gif" border="0" alt="[cheers]" />
James <img src="graemlins/beerchug.gif" border="0" alt="[cheers]" />
