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post #1 of 16 Old 05-08-2011, 07:03 PM Thread Starter
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Air Filter

I am installing my on3 kit. I got the spectre filter they recommend but it does not fit at all. Looks like I am going to have to get a short 3.5in k and n. Will this small of a filter hurt my performance or not so much because it isn't n/a?

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post #2 of 16 Old 05-09-2011, 10:09 PM
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My car hated that little K&N. Wouldn't make more then 15 psi. If you are running moderate boost it should be better.

A screen cost me 150rwhp on the dyno on an 88.

Anything in front of turbo is a major restriction.


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post #3 of 16 Old 05-09-2011, 10:55 PM
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I run a 3.5" shorty K&N all the time unless I dyno/race

haha

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post #4 of 16 Old 05-10-2011, 12:03 PM
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small filter for driving but it will KILL your performance. my car picked up 7 tenths by removing my small k&n filter. fab a large filter in the fender well so that turbo can breath.

1993 notch 302 and c4
quicktime turbo system
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post #5 of 16 Old 05-10-2011, 12:22 PM
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I seen in on3's website on there 94-95 white moc up car that they had a 4" stainless elbo going into the fenderwell. I wonder where they got that?? I have the same kit as well on my sn95 and I run a small spectra. Large one wouldnt fit( too long).
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post #6 of 16 Old 05-11-2011, 07:43 AM Thread Starter
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I seen in on3's website on there 94-95 white moc up car that they had a 4" stainless elbo going into the fenderwell. I wonder where they got that?? I have the same kit as well on my sn95 and I run a small spectra. Large one wouldnt fit( too long).
I bought the smaller spectre performance one and it hit bad. I had to order the k and n. I am worried about making too much power as it is a stock block so this may be a good thing for now at least.

That elbow on3 sells for $100, I don't know how well a filter will fit in the fender with the intercooler piping.
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post #7 of 16 Old 05-11-2011, 01:34 PM
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too much power? no such thing.

1993 notch 302 and c4
quicktime turbo system
9.986 @ 136.84
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post #8 of 16 Old 05-11-2011, 01:59 PM Thread Starter
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too much power? no such thing.
LOL, true. I would like this bottom end to last, so being conservative.
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post #9 of 16 Old 05-11-2011, 10:21 PM
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Yeah I know how that is just get a good tune and hammer down

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post #10 of 16 Old 05-17-2011, 12:02 PM
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Quote:
Originally Posted by mw95gt View Post
I seen in on3's website on there 94-95 white moc up car that they had a 4" stainless elbo going into the fenderwell. I wonder where they got that?? I have the same kit as well on my sn95 and I run a small spectra. Large one wouldnt fit( too long).

Although it may follow supercharger logic to pull from fender beware, turbos move more air through a smaller hole and HATE obstructions.

Save your $100 for something else.


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1990 Saleen 90-137 heavily modded
1989 Shadow Blue Metallic Hatchback LX
[email protected] -- 94mm T4 True Street Trim
Thanks: Baer, Haltech, UPR, National Parts Depot, Meziere, Weldon, BBRC
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post #11 of 16 Old 05-19-2011, 07:15 PM
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I left the filter on this time on the dyno and was surprised to see the car made 771rw. Wonder what it would have done with it off, I shoulda tried it!

I run a shorty filter, so I know it cant be helping

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post #12 of 16 Old 05-20-2011, 01:33 PM Thread Starter
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I left the filter on this time on the dyno and was surprised to see the car made 771rw. Wonder what it would have done with it off, I shoulda tried it!

I run a shorty filter, so I know it cant be helping
I ended up buying the k and n shorty. It is the only thing that will fit and I am not running without one on the street... I will lose some hp but will keep junk out of the turbo and engine.c
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post #13 of 16 Old 05-20-2011, 02:17 PM
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Im also running the little shorty K&N and i wonder how much i would pick up at the track by taking it off, i forgot to the last time i was at the track.

Brett
91 GT 302 CID c4 w/brake
TFS TW heads, f-cam, typhoon
70mm masterpower single turbo setup.
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post #14 of 16 Old 05-20-2011, 06:39 PM
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I ended up buying the k and n shorty. It is the only thing that will fit and I am not running without one on the street... I will lose some hp but will keep junk out of the turbo and engine.c
I run the same filter. I feel the same, espeically after having a turbo failure in the past. Mine was a diff failure, but if you injest something you are done, and where my turbo is it wouldnt take much.
On the MPT70 mine spooled quicker and always seemed to run better w/o the filter but I have no real hp guess. I mainly did it because it made the turbo REAL loud HAHA.

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post #15 of 16 Old 05-20-2011, 11:41 PM Thread Starter
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Just an update I mounted it tonight, and well with the on3 kit on my 94 cobra, this filter fits PERFECT!
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post #16 of 16 Old 05-21-2011, 09:48 AM
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Good deal!

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