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#401619 Feb 16, 12:38pm
Joined: Dec 2004
Posts: 419
Senior Member
2003 Toyota Celica GT
Senior Member
2003 Toyota Celica GT
Joined: Dec 2004
Posts: 419
So I just took out my butterfly valve, sounds great! If I were to put a K&N filter in, I know it still wouldn't be as deep as a Short ram. Why is that? Also, would no butterfly + a K&N still be as much of a gain as a short ram?

Joined: Apr 2003
Posts: 1,899
ThE iRoN mAiDeN
2003 Toyota Celica GT
ThE iRoN mAiDeN
2003 Toyota Celica GT
Joined: Apr 2003
Posts: 1,899
No, you gain 1-2hp, a short ram gets you around 5hp. Why not as loud, no metal pipe to resonate.

Joined: Jun 2004
Posts: 3,744
CF Connoisseur
2004 Toyota Celica
CF Connoisseur
2004 Toyota Celica
Joined: Jun 2004
Posts: 3,744
what he said smile i had both. ahve rmm sri now and it soudns so awsome. deff allot laouder then stock box-bfv. The difference is stock si all plastic, with many ridgeds, and has that whole box thing at the end smile The sri is jsut a metal pipe with a filter at the end. You really hear the engine wih it. ps sorry for bad typing i am at work and keyboard sucks smile

Joined: Dec 2004
Posts: 466
Senior Member
2004 Toyota Celica
Senior Member
2004 Toyota Celica
Joined: Dec 2004
Posts: 466
Taking it out the butterfly valve doesn't get you any HP at all. I think SCC did that on there project car and it showed no gains at all. But it just gives you that mean sound down that everybody loves. Adding in a K&N filter will give you like the others say a few extra HP, which is worth it.

The reason SRI is still louder is because it eliminates all the factory tubing and replaces it with a much larger metal piping, which resonates and sounds a lot louder, plus you get more HP gain out of it.

Joined: Dec 2003
Posts: 487
Senior Member
2003 Toyota Celica
Senior Member
2003 Toyota Celica
Joined: Dec 2003
Posts: 487
^ Your right:

Project Celica: Part 2
The Dawn of Celica Tuning

http://www.sportcompactcarweb.com/projectcars/0010scc_projcelica/

"Last month we tried removing the flap door assembly and thought we felt a significant improvement in both power and drivability, but subsequently found no power on the dyno. We then tried swapping the flap door in and out without telling the driver and found that nobody could really tell the difference. Our conclusion? Taking out the flap door doesn't hurt, and may or may not improve drivability."

Here are parts 1 and 3:

http://www.sportcompactcarweb.com/projectcars/0009scc_projcelica/

http://www.sportcompactcarweb.com/projectcars/0106scc_projcelica/


Last edited by GTS2003BLK; Feb 16, 2005 4:25pm.

Joined: Dec 2004
Posts: 466
Senior Member
2004 Toyota Celica
Senior Member
2004 Toyota Celica
Joined: Dec 2004
Posts: 466
^ Yeah that's the exact report I was talking about! smile

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