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Joined: Mar 2004
Posts: 4,141
Hard-core CEG\'er
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Hard-core CEG\'er
Joined: Mar 2004
Posts: 4,141 |
Originally posted by DemonSVT:
Stock crush flange in the Y-pipe.
Stock panel airbox.
Stock resonator.
Stock muffler.
Stock UIM
Stock TB.
Stock heads.
Stock LIM.
Demon, where would you put the stock manifolds WITHOUT gutted pre-cats?
99 SE V6\5spd - 156 HP\157 TQ 15.166-90.84
Totaled 02/12/06
99 SVT # 1571 - 175 HP\153 TQ 14.999-91.88
Born 3/24/99 Reborn 3/18/06
Pietenpol Racing Technologies project vehicle
90 Festiva L 5spd, Blue(not for long), 103k
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Joined: Mar 2003
Posts: 7,117
Hard-core CEG'er
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Hard-core CEG'er
Joined: Mar 2003
Posts: 7,117 |
Originally posted by Tourige:
You just do what i did and take off the Catback exhaust, Sounds ... retarted.
Fixed.
Must be that jumbly-wumbly thing happening again.
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Joined: Mar 2003
Posts: 7,117
Hard-core CEG'er
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Hard-core CEG'er
Joined: Mar 2003
Posts: 7,117 |
Originally posted by pole120:
Originally posted by DemonSVT:
Stock crush flange in the Y-pipe.
Stock panel airbox.
Stock resonator.
Stock muffler.
Stock UIM
Stock TB.
Stock heads.
Stock LIM.
Demon, where would you put the stock manifolds WITHOUT gutted pre-cats?
The threads I've read on the subject and my own experience with gutted manifolds indicate that there is no measurable gain from gutting precats as the enlarged chamber & subsequent piping slow the exhaust flow to ruin exhaust scavenging. So, precats are not really a big restriction compared to gutting. The stock manifolds just SUCK. Headers will net you between 5 and 15% HP increase at the wheels & very noticable torque gain. 
Dammit! Now I have to go order some MSDS headers!
Must be that jumbly-wumbly thing happening again.
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Joined: May 2004
Posts: 3,637
Hard-core CEG\'er
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Hard-core CEG\'er
Joined: May 2004
Posts: 3,637 |
Originally posted by TourDeForce:
Originally posted by Tourige:
You just do what i did and take off the Catback exhaust, Sounds ... retarted.
Fixed.
haha yea, I need my Bosal Already. I just took the exhaust off becuase i was working on my E-brake.
99 TRed Contour SVT # 1853 out of 2760
230.2 WHP @ 6500
237.0 WTR @ 2250
Originally posted by MxRacer:
Originally posted by RawBurt:
I'll be keeping it to myself, until the time comes. It'll be hard to find. 
much like your weiner.
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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 |
SVT airbox appears to be good to about 200 wHP with the many dyno's I've run and seen, but that is on a 3L which is wheezing its way up to 200 wHP. Just pulling stock SVT filter off for one run was good enough for a 5-6HP gain in back to back runs.
For the 2.5L with less displacement it my start affecting things lower, in the 180 wHP range.
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: Aug 2001
Posts: 5,810
Hard-core CEG'er
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Hard-core CEG'er
Joined: Aug 2001
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I know I'm not demon but you might want an additional opinion. The stock precats aren't that restrictive. They use essentially the same precats on the escape with very little detriment in power. That is if the precats are flowing like new. If they are plugged then it would be #1 in the list.  List: Stock crush flange in the Y-pipe. Stock panel airbox. Stock resonator. ***Rear 1->2 y-pipe on quasi-dual SVT system (sometimes found to have metal restricting flow and necking down) Stock muffler. ***Precats*** Stock UIM Stock TB. Stock heads. Stock LIM.
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 2000
Posts: 9,602
Hard-core CEG'er
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Hard-core CEG'er
Joined: Sep 2000
Posts: 9,602 |
The precat manifolds are fairly restrictive. However it's the log design and not really the catalyst material. I missed those.
I would put them near the bottom of the "stock" list (above the heads) and right above the "SVT" parts on the "SVT" list.
I have cut my rear Y-split apart. It was well made and would pose no significant flow restriction as the 2.25" O.D. pipe splits to twin 2" O.D. piping. I would not even list it.
Other flow restrictions:
Stock airbox (it's so obvious though!)
Stock accordian tube
SVT accordian tube
SVT airbox
Stock MAF
2000 SVT #674
13.47 @ 102 - All Motor!
It was not broke; Yet I fixed it anyway.
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Joined: Feb 2003
Posts: 710
Veteran CEG\'er
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Veteran CEG\'er
Joined: Feb 2003
Posts: 710 |
I haven't seen anyone mention it before, so I don't know if my exhaust is a rare bastard, but the bend right before my resonator is not mandrel -- it's crushed. Been trying to ignore it until I get a new full exhaust, but it still bugs me.
morbid
2000 Contour SVT (black)
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Joined: May 2004
Posts: 3,637
Hard-core CEG\'er
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Hard-core CEG\'er
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did you buy the car from the dealer or from a person?
99 TRed Contour SVT # 1853 out of 2760
230.2 WHP @ 6500
237.0 WTR @ 2250
Originally posted by MxRacer:
Originally posted by RawBurt:
I'll be keeping it to myself, until the time comes. It'll be hard to find.
much like your weiner.
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Joined: Mar 2003
Posts: 7,117
Hard-core CEG'er
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Hard-core CEG'er
Joined: Mar 2003
Posts: 7,117 |
Originally posted by Tourige:
Originally posted by TourDeForce:
Originally posted by Tourige:
You just do what i did and take off the Catback exhaust, Sounds ... retarted.
Fixed.
haha yea, I need my Bosal Already. I just took the exhaust off becuase i was working on my E-brake.
You're a good man, Tourige. Glad you didn't take the ribbing personally. 
You'll enjoy the Bosal!
Must be that jumbly-wumbly thing happening again.
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