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12-23-2008, 12:28 PM
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#1
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Boost Junkie
Join Date: Aug 2008
Posts: 729
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My next mod
Just picked up a Borla/Mopar catback for the ride.. going on soon I hope! Picked this up for a STEAL. Stay tuned...
exhaust is 2.5" piping all the way through, 4" tips... exhaust is painted black and I haven't decided officially if I will touch up the black with High Temp paint or strip the tips and polish back to their original sheen... should be a nice little power adder for my stock turbo and make a huge sound difference... next meet i'll have her hood popped! Maybe even a new BOV...
I'll post up some pictures of the installation, really interesting design, all slip jointed, no bolts or flanges anywhere. slip it on and clamp it down! Should be a breeze. exhaust is light, less than 25-30 lbs.
__________________
Mods: Coilovers, Mopar CAI, Maxxfab o2, catless DP w/ Borla exhaust...
Best ET 14.668 see timeslip
Mods to come: rims + rubber, intercooler, piping, Stage 3 equivelent turbo system with aftermarket turbo and all supporting systems. Goal HP: 400fwhp Goal ET: 11.90 on slicks.
<guy in turbo eclipse>
I'd race ya, but you'd eat me up dawg!!!
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12-23-2008, 12:39 PM
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#2
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Resident Avatar Gambler
Join Date: Nov 2006
Posts: 5,997
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Quote:
Originally Posted by BlacknBoostn
Just picked up a Borla/Mopar catback for the ride.. going on soon I hope! Picked this up for a STEAL. Stay tuned...
exhaust is 2.5" piping all the way through, 4" tips... exhaust is painted black and I haven't decided officially if I will touch up the black with High Temp paint or strip the tips and polish back to their original sheen... should be a nice little power adder for my stock turbo and make a huge sound difference... next meet i'll have her hood popped! Maybe even a new BOV...
I'll post up some pictures of the installation, really interesting design, all slip jointed, no bolts or flanges anywhere. slip it on and clamp it down! Should be a breeze. exhaust is light, less than 25-30 lbs.
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Tyler, I know the SRT doesn't have mufflers (resonators), so how much difference power wise does it actually make? |
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12-23-2008, 01:36 PM
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#3
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Boost Junkie
Join Date: Aug 2008
Posts: 729
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Quote:
Originally Posted by SeanPlunk
Tyler, I know the SRT doesn't have mufflers (resonators), so how much difference power wise does it actually make?
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It should be good for about 8-12whp, the Borla/Mopar design offers increased exhaust flow, eliminates some of the bends along with larger diameter piping. 2.25 up to 2.5 (almost bought a 3in exhaust from the turbo back but this was such a steal I couldn't turn it down).
The SRT does have two resonators, just no mufflers... the Borla/Mopar eliminates one of the resonators.
http://www.modernperformance.com/pro...oducts_id=1251
Link to back it up.. you can see the dyno sheet along with the stock and mopar exhaust, very easy to see that the Borla/Mopar one has a better design...
That 3in turbo back is still in the sights but this will be a good start for my stock turbo!
youtube video..
__________________
Mods: Coilovers, Mopar CAI, Maxxfab o2, catless DP w/ Borla exhaust...
Best ET 14.668 see timeslip
Mods to come: rims + rubber, intercooler, piping, Stage 3 equivelent turbo system with aftermarket turbo and all supporting systems. Goal HP: 400fwhp Goal ET: 11.90 on slicks.
<guy in turbo eclipse>
I'd race ya, but you'd eat me up dawg!!!
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12-23-2008, 04:01 PM
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#4
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Fast & Filthy
Join Date: Jun 2008
Posts: 3,840
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You'll probably make more HP with the 2.5 as your car sits right now anyways. I think the 3 inch will be too big until you get some more mods.
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12-23-2008, 10:18 PM
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#5
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Boost Junkie
Join Date: Aug 2008
Posts: 729
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Quote:
Originally Posted by 94cobra69ss396
You'll probably make more HP with the 2.5 as your car sits right now anyways. I think the 3 inch will be too big until you get some more mods.
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Exactly what I was thinking myself... i'm on stock boost, stock turbo, stock stock stock. When i go with a ported turbo or s3 turbo i'll upgrade to 3in  only way it'd help now is for mileage haha...
__________________
Mods: Coilovers, Mopar CAI, Maxxfab o2, catless DP w/ Borla exhaust...
Best ET 14.668 see timeslip
Mods to come: rims + rubber, intercooler, piping, Stage 3 equivelent turbo system with aftermarket turbo and all supporting systems. Goal HP: 400fwhp Goal ET: 11.90 on slicks.
<guy in turbo eclipse>
I'd race ya, but you'd eat me up dawg!!!
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12-23-2008, 10:25 PM
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#6
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I, Vettezuki
Join Date: Feb 2006
Posts: 14,754
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Quote:
Originally Posted by BlacknBoostn
Exactly what I was thinking myself... i'm on stock boost, stock turbo, stock stock stock. When i go with a ported turbo or s3 turbo i'll upgrade to 3in only way it'd help now is for mileage haha... |
I sure as heck don't understand all the combustion theory and engine dynamics, but it does seem one of the most commonly overdone mods for I4s is an overly large exhaust. As I understand it, the problem is excessively reducing cylinder back pressure, thus torque and finally power.
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12-24-2008, 04:30 AM
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#7
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Power's off.
Join Date: Dec 2008
Posts: 673
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Quote:
Originally Posted by Vettezuki
I sure as heck don't understand all the combustion theory and engine dynamics, but it does seem one of the most commonly overdone mods for I4s is an overly large exhaust. As I understand it, the problem is excessively reducing cylinder back pressure, thus torque and finally power.
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Urban myth BS.  |
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12-24-2008, 10:25 AM
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#8
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Boost Junkie
Join Date: Aug 2008
Posts: 729
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Quote:
Originally Posted by Vettezuki
I sure as heck don't understand all the combustion theory and engine dynamics, but it does seem one of the most commonly overdone mods for I4s is an overly large exhaust. As I understand it, the problem is excessively reducing cylinder back pressure, thus torque and finally power.
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Too true...
3in piping should only be for boosted cars! If I was running a BIG turbo like a GT35R or bigger... THEN a 3-4in piping might be beneficial.
Till then, this will do the job nicely one thing is for sure, SRTs have lots of power to free up!
__________________
Mods: Coilovers, Mopar CAI, Maxxfab o2, catless DP w/ Borla exhaust...
Best ET 14.668 see timeslip
Mods to come: rims + rubber, intercooler, piping, Stage 3 equivelent turbo system with aftermarket turbo and all supporting systems. Goal HP: 400fwhp Goal ET: 11.90 on slicks.
<guy in turbo eclipse>
I'd race ya, but you'd eat me up dawg!!!
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12-24-2008, 11:26 AM
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#9
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Neanderthal
Join Date: Mar 2008
Posts: 5,320
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Quote:
Originally Posted by big2bird
Urban myth BS. |
Yep, I was going to say that. You DO NOT want back pressure on any kind. 
__________________
64 Vette Roadster 400 ci
1990 F150 351 ci SuperCharged
48 Harley Pan Head 76 ci
2016 Nissan Altma
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12-24-2008, 11:32 AM
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#10
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Neanderthal
Join Date: Mar 2008
Posts: 5,320
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Quote:
Originally Posted by Vettezuki
I sure as heck don't understand all the combustion theory and engine dynamics, but it does seem one of the most commonly overdone mods for I4s is an overly large exhaust. As I understand it, the problem is excessively reducing cylinder back pressure, thus torque and finally power.
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Ok, why would want any back pressure? That ONLY causes the the in coming charge to be reduced. Thus less power. 
__________________
64 Vette Roadster 400 ci
1990 F150 351 ci SuperCharged
48 Harley Pan Head 76 ci
2016 Nissan Altma
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