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Joined: Aug 2001
Posts: 976
Veteran CEG\'er
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Veteran CEG\'er
Joined: Aug 2001
Posts: 976 |
Originally posted by BStoneMega:
So Bnoon, are you saying a catback exaust may not give me as much power as it would on a N/A engine? Also when I do put on a cat back I could actually lose boost?
On the SVT cams there is a little overlap where the intake AND exhaust valves are open, what will happen is the boost will come in and go right out. If you have a free flowing exhaust it will go out easier and faster losing boost, if she's all bottled up then it will slow and you build more boost..simple explanation for a complicated process but you get the idea. Cat backs are always a good idea though. You have the 3.33" 6-rib pulley and Vortech offers 3.125" (what I'm running my 3L) a 2.87" and a smaller one yet. You won't get any more boost unless you surpass the flow capabilies of that bosch bypass, then you'll get boost creep and it will creep up from 10psi. Run the 3.125" that will bring boost sooner and you won't out flow the bypass.
I offer PnP Heads for all durtec's details at PnPheads.com or jesse@pnpheads.com for details.
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Joined: Sep 2002
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Hard-core CEG\'er
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OP
Hard-core CEG\'er
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cool,I take it I can order up the 3.125" pulley from vortech and not run into any problems. That sounds good, I wonder why they don't give the smaller pulley in the first place?
2004 Evolution VIII cams-exhaust-tune
315whp 12.7@109
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Joined: Aug 2001
Posts: 976
Veteran CEG\'er
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Veteran CEG\'er
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Posts: 976 |
So they get another $60 from you!
I offer PnP Heads for all durtec's details at PnPheads.com or jesse@pnpheads.com for details.
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Joined: Sep 2002
Posts: 1,196
Hard-core CEG\'er
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OP
Hard-core CEG\'er
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2004 Evolution VIII cams-exhaust-tune
315whp 12.7@109
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Joined: Jun 2000
Posts: 2,621
Redneck Troll
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Redneck Troll
Joined: Jun 2000
Posts: 2,621 |
Originally posted by BStoneMega:
So Bnoon, are you saying a catback exaust may not give me as much power as it would on a N/A engine? Also when I do put on a cat back I could actually lose boost?
No, that's not it at all... Even though the boost may go down, you're still gaining HP because your over all flow is going up. Boost is only airflow vs. restriction... Lower the restriction, boost goes down, but air flow can go up = HP goes up. Want more boost after removing a restriction, such as exhaust? Spin the SC faster to bring up the pressure ahead of the engine again. That's why Vortech gives you the smaller pulley to start with on a stock car, then sells you the smaller ones to bring the boost back up once the rest of the car is modded. Find the smaller pullies on Ebay for $20 or so...
http://www.bnmotorsports.com
"And I will strike down upon thee with great vengeance and furious anger those who attempt to poison and destroy my CEG brothers. And you will know I am the Moderator when I lay my vengeance upon you."
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Joined: Sep 2002
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wow...I really am learning quite a lot, You guys can really explain this stuff so a guy with little knowledge on cars can understand it. Thanks alot fellas, it feels good to get a non sarcastic, non bashing answer. Mucho gracias! 
2004 Evolution VIII cams-exhaust-tune
315whp 12.7@109
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Joined: Jul 2002
Posts: 482
CEG\'er
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CEG\'er
Joined: Jul 2002
Posts: 482 |
Originally posted by BStoneMega:
wow...I really am learning quite a lot, You guys can really explain this stuff so a guy with little knowledge on cars can understand it. Thanks alot fellas, it feels good to get a non sarcastic, non bashing answer. Mucho gracias!
[bashing&sarcasm]dude, much as gracias...come on now..this is 2K2..ignorance isn't an option[/bashing&sarcasm]  sorry...it's late
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Joined: Sep 2002
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Hard-core CEG\'er
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haha thanks for bringing me back! 
2004 Evolution VIII cams-exhaust-tune
315whp 12.7@109
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Joined: Aug 2001
Posts: 5,810
Hard-core CEG'er
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Hard-core CEG'er
Joined: Aug 2001
Posts: 5,810 |
You really are producing nice numbers from just a basic install. What exhaust system, are you mystery modded or not?
warmonger
Former owner of '99 CSVT - Silver #222/2760
356/334 wHP/TQ at 10psi on pump gas!
See My Mods
'05 Volvo S40 Turbo 5 AWD with 6spd, Passion Red
'06 Mazda5 Touring, 5spd,MTX, Black
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Joined: Sep 2002
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Hard-core CEG\'er
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I am running the stock svt exaust with a straight pipe in place of the resonator. Other than that the engine and exaust is stock. I'm not mystery modded, tell you the truth I don't even know what it is. I always thaught that my car produced slightly higher numbers than whats the norm. With just a bat intake and k&n filter I hit 174 hp. so the supercharger was bolt on 100 hp at the wheels, i was suprised at that too.
2004 Evolution VIII cams-exhaust-tune
315whp 12.7@109
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