Welcome to Mustang Evolution.
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09-08-2005, 01:59 AM
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#1
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side exhaust probs
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Advocate of The Hyphy Movment
Join Date: Aug 2005
City: V-a-L-L-e-j-o
State: California
Posts: 363
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am i really suppose to lack backpressure? i'm pretty much stock except for the mac intake magnaflow x pipe and roush side exhaust.. i have 2in piping for the x and the outlet i have 2 1/2.. its pretty slow from 70-on.. also im an automatic.. should i have the outlet pipe, re-piped to like 2 in?what should i do? Also anyone know where i can find some cool cobra r like tips..(stainless steel) for a good price? spintech is asking 150 per tip! 
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1989 coupe 5.0 yeessur.
"Shake n bake"
Last edited by powerhungry966; 09-08-2005 at 02:38 AM.
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09-08-2005, 04:06 AM
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#2
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Re: side exhaust probs
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^needs more bondo
Join Date: Sep 2003
City: Modesto
State: California
Posts: 9,574
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backpressure creates torque, but limits top end.
free flowing exhaust creates top end, but limits down low torque.
right now, up top, youre engine is starving for air. and the added drivetrain loss of a automatic isnt helping much. some p&p heads and upper/lower plenums ought to help out, possibly cams also. but youre still being held back by the auto. beef it up a little(shift kit, higher stall torque convertor) and it should beef it up a little. also a rear diff with higher gearset(3.73 or 4.1) would help out immensly with an auto.
btw your exhaust setup sounds fine. and i think i found some of those dual slanted round tips(cobra r style) on ebay once. btw do you have the roush side tips? id take them off your hands if your looking into different ones.
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-Thomas-
2003 Redfire Cobra "Ruby" - Mine Again!
1990 Eclipse GSX - Project "What the Hell is that clunking noise and where did my power steering go?!"
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09-09-2005, 09:53 AM
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#3
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Re: side exhaust probs
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Needs turbo.
Join Date: Nov 2003
City: Mt. Juliet
State: Tennessee
Posts: 5,093
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Naw, your fine. It's just out cars have 150hp from the factory. 
Mine loses its pull after second. Just doesn't feel as fast. |
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09-09-2005, 03:01 PM
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#4
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Re: side exhaust probs
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WTF^^...
Join Date: May 2003
City: Hoover / Florence
State: Alabama
Posts: 27,124
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2.25 pipe is what is needed, with side exhaust you may notice a little change but nothing major. I had dumps (same basic concept) and I didnt notice much difference. You have crappy gears and a slow shifting auto... that definatly hurts your performance. I would get some gears and see how that helps (4.10s and tlok unit, preferably an 8.8 inch rear end)
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2003 REDFIRE COBRA #3938 of 5082 @ 05/27/2003 1 of 414
MGW Shifter, Stingers, JLT, SS Inserts, MM FLSFC & CC Plates, SS Lines, H&R Race springs, IRS Brace, MRT Hood Struts
ME.com Member #29 - 400rwhp/380rwtq
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09-10-2005, 01:06 AM
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#5
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Re: side exhaust probs
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The 4.2L Guy
Join Date: Nov 2003
City: Scumter; Home: Chicago, IL
State: South Carolina
Posts: 2,030
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yes, your rear gears are killing you. You have 2.73's for stock gears, YIKES!!!! these are anything but performance gears. Also, get yourself an underdrive pulley, that'll free up some power for you as well.
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60' ~ 2.1, 1/8 ~ 9.61 @ 73.4mph
Living one day at a time!
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09-12-2005, 08:27 AM
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#6
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Re: side exhaust probs
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Needs turbo.
Join Date: Nov 2003
City: Mt. Juliet
State: Tennessee
Posts: 5,093
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2.73=gas mileage
muwhahahaha!  |
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09-15-2005, 02:46 AM
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#7
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Re: side exhaust probs
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Advocate of The Hyphy Movment
Join Date: Aug 2005
City: V-a-L-L-e-j-o
State: California
Posts: 363
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eclipse dude i have 4 inch duals tips.. no roush ones sorry.. my ground clearance sucks! haha but i agree 2.73 gas milage rocks! although.. i have pretty meatty tires in the back.. so im sure thats not helping me nun.. 17 by 10.5 on some 275 pretty heavy compared to the regular rimz HAHA 15 TRIANGLES.. but how much would i be looking at if i were to upgrade gears? i mean i travel about sixty miles probobly twice a week on the free way? would 4.10s hurt my engine and or transmissioN? wont the rpm level be at 3500!? that'll kill my gas for sure! if not my car first.. also p&p heads opposed to ported intake manifolds which one would help me out more? the heads are like 1000 while the ported intake manifolds are like 2-3 hundred...
__________________
1989 coupe 5.0 yeessur.
"Shake n bake"
Last edited by powerhungry966; 09-15-2005 at 02:52 AM.
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09-15-2005, 04:07 AM
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#8
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Re: side exhaust probs
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Advocate of The Hyphy Movment
Join Date: Aug 2005
City: V-a-L-L-e-j-o
State: California
Posts: 363
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oh one more thing, where can i find these shift kits?!
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1989 coupe 5.0 yeessur.
"Shake n bake"
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09-15-2005, 04:09 AM
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#9
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Re: side exhaust probs
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postarama
Join Date: Aug 2003
City: Southaven
State: Mississippi
Posts: 24,295
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I know one of our sponsors has them, one sec and I'll search.
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"I'm not driving too fast...just flying too low"
Mine:
-87 ranger- broke
-03 SB Cobra vert- 2552 of 5082 Born 02/25/03
Our's:
90 7up vert - new project
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