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Old 11-20-2001, 03:25 PM   #1
MINDGAME
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No, it's not a WRX...

Default Is a supercharger closer related to NA for...

OK, I know that a supercharger is forced induction and I know this is the NA forum, but I suspect this question might apply....hear me out: There are no viable superchargers available for the 2.5 as of yet, but I have heard of a few in the works (someone from the South West forum, and whoever has retained the rights to the Rimmer model...JC Sports?) Anyway, if I were to be so naive as to hold my breath for a supercharger, how would I go about modding my car in the meantime? When it comes to things like exhaust and electronics would I follow the rules as they apply to turbos or NA cars?...or is there a whole new set of rules? The reason I ask is becuase I don't want to wait 2 years to do anything to my car, but I don't want to spend money on anything that I will have to change at a later date if a supercharger becomes available. Thanks.

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Old 11-20-2001, 03:27 PM   #2
Keiho
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Same rules, improve breathing.

Intake might be pointless since a supercharger will probably require a different intake, but everything else helps. Exhaust (go with the turbo rule of thumb, 2.5" and up), and headers to improve the flow.

Then I'd suppose you'd want to improve on the fueling and how you'd go about controlling that.
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Old 11-20-2001, 03:57 PM   #3
bsquare
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The same engine management and fueling rules apply as for any other forced induction system. The exhaust can be different, since you have a ton less exhaust piping. You can actually use any of the new NA headers out there and slap on a 2.5" or 3" exhaust from the headers back.

And yes, this should go in Aftermarket Forced Induction (we don't talk about superchargers much because they have far lower power potential in our cars and because SC kit vendors have typically sucked hard).


Ben
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Old 11-21-2001, 08:00 AM   #4
ylexot
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Ah, but would you really want a large (2.5-3in) diameter exhaust for a supercharger? I know you want that for turbo because you want as much flow as possible to spool the turbo. But since the SC is belt driven, do you need/want a high-flow exhaust?

Yeah, I think this belongs in forced induction. You will probably find better answers there too.
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Old 11-21-2001, 11:16 AM   #5
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I would say work on the back end and fuel delivery and management first. ONe thing that will help when you have a supercharger that you can get before hand to prepare is a larger diameter throttle body. Check with Cobb Tuning about that. Get the Supercharger then work on retuning for a little while. Then save up for Cylinder Heads and Cams. Then be ready for a new tranny. At the same time you install the higher flow heads and aggressive cams slap on a higher psi pulley.

Could you imagine a Sueprcharged EJ25 running 10-14 psi pulley?!

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Old 11-21-2001, 02:49 PM   #6
bsquare
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Quote:
Ah, but would you really want a large (2.5-3in) diameter exhaust for a supercharger?
You need an exhaust appropriately sized for the application. If you are only running 7psi, you can use 2.5". If you push up to 10psi, you probably need 3". It's a question of flow.


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Old 11-21-2001, 09:51 PM   #7
ashtaron14
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I can just imagine a 2.5 with a Supercharger... ... big piece of steel sticking out in the middle of the hood... HUGE intake point... like one of those funny cars...
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Old 11-22-2001, 12:11 AM   #8
edekker
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MINDGAME,

The first thing you should do is fit yourself a set of gauges.
Recommend are: EGT, A/F, FP and boost. Learn how to interpret them correctly with confidence.
That way you will get to know your car, realize some baseline numbers, and work your way from there.

Your car will need very little modification in preparation for an SC that puts out no more than 5 PSI (at sea level). You can always go higher, but then so do the costs - drastically. Take it one step at a time.

My car was bone... and I mean bone stock when I had my SC installed it made more than enough fantastic power. If it had been set at a lower boost level (such as 5 lbs.), it would have been a worry-free turnkey setup. Alas, because it was at 7-1/2 lbs, a huge Pandora's box had opened up that I wouldn't even get into at this moment - You can search the archives if you must know more, or check out my 'Chronological Record of Events'

http://members.home.net/edekker/rs/history.htm
-----

As you can see, there are no 'pieces of steel sticking out' of the hood:





Ed.
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Old 11-22-2001, 10:09 AM   #9
Patrick Olsen
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Quote:
Originally posted by edekker:
As you can see, there are no 'pieces of steel sticking out' of the hood
It's amazing how many people have this completely screwed up image of superchargers in their head. I get this kind of comment all the time about my Mustang when I tell someone (who's never seen the car) that I have a supercharger on it. "Oh, did you have to buy a new hood to do that?" Uhhhh, no, but thanks for playing.

Pat Olsen
'97 Legacy 2.5GT sedan
'89 Mustang GT convertible (formerly Procharged 302, now a driveway monument with a broken crankshaft )
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Old 11-22-2001, 12:06 PM   #10
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Pieces of steel sticking out of the hood checkin in!!!
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Old 11-22-2001, 04:18 PM   #11
MINDGAME
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edekker, patrick Olsen: Who's superchargers are you running? Are they Rimmer's or something else?
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Old 11-23-2001, 07:35 AM   #12
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The only rimmer left in my kit is the plenum between the throttle body and the blower. the rest is Dan-o-matic 9000 type r
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