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 FAQ: Down Pipe Questions (Series I SC)

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etosino2009
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FAQ: Down Pipe Questions (Series I SC) - Page 2 Empty
PostSubject: Re: FAQ: Down Pipe Questions (Series I SC)   FAQ: Down Pipe Questions (Series I SC) - Page 2 EmptyFri Jun 06, 2008 5:50 pm

just got mine, and after looking around for awhile i found a shop that will be willing to take the cat off for me which i will be taking in tommorow.
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etosino2009
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PostSubject: Re: FAQ: Down Pipe Questions (Series I SC)   FAQ: Down Pipe Questions (Series I SC) - Page 2 EmptySat Jun 07, 2008 6:31 pm

The 3in shorty will not hook up to the 95's where you bolt it up to is too wide no im stuck with the cat off and only the stock downpipe not even hooked up the the rest of the pipes which i need to get. i treid driving around and it wasnt a good experince lets just say your going to need earplugs. i think im just going to have my friend drive me in his car to get the pipes.
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95ParkAveUltra
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FAQ: Down Pipe Questions (Series I SC) - Page 2 Empty
PostSubject: wbodystore.com or zzp downpipe?   FAQ: Down Pipe Questions (Series I SC) - Page 2 EmptyMon Feb 02, 2009 6:13 pm

hey im new here done alot of lookin around and learned alot of stuff. must say this forum is a great place. i use to have a riviera but my brother totalled it, before i got to see its potential. ended up getting a 95 park ave ultra from my grandfather and looking forward to modding it. i have already made a fwi. next step is 2.5 pulley with 104's. i will be getting a downpipe i just dont want to spend tons of money.
would one of these fit a series 1 in the park ave ultra? or would i be better off getting a custom one made? if custom what do yall think the price range would be?

http://www.wbodystore.com/grandprix/3-downpipes-3800-v6-new-options-p-239.html

or the zzp 3" shorty?


Last edited by 95ParkAveUltra on Fri Feb 06, 2009 5:28 pm; edited 1 time in total
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Karma
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FAQ: Down Pipe Questions (Series I SC) - Page 2 Empty
PostSubject: Re: FAQ: Down Pipe Questions (Series I SC)   FAQ: Down Pipe Questions (Series I SC) - Page 2 EmptyMon Feb 02, 2009 9:38 pm

I'm afraid I can't help with the downpipe, as I don;t know. However you might want to consiter this article before just dropping your pulley to 2.5"
http://www.pontiacbonnevilleclub.com/forum/viewtopic.php?f=44&t=1660

_________________
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95ParkAveUltra
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PostSubject: Re: FAQ: Down Pipe Questions (Series I SC)   FAQ: Down Pipe Questions (Series I SC) - Page 2 EmptyTue Feb 03, 2009 12:46 am

what scan tool do yall use. all i see is one on seriesoneperformance.com or whatever but the link is dead. i have the obd1.5 case so i need one that will work. im looking into sinister performance's tune. not sure if anyone has any opinion or feed back on there tunes. it would help. thanks again
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texasfan010
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PostSubject: Re: FAQ: Down Pipe Questions (Series I SC)   FAQ: Down Pipe Questions (Series I SC) - Page 2 EmptySat May 16, 2009 1:05 am

I have a 96' riviera. I want to get a 3" DP, what would be the best thing to do?
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L67
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PostSubject: Re: FAQ: Down Pipe Questions (Series I SC)   FAQ: Down Pipe Questions (Series I SC) - Page 2 EmptySat May 16, 2009 1:53 am

texasfan010 wrote:
I have a 96' riviera. I want to get a 3" DP, what would be the best thing to do?

ZZP 3" Shorty.
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Mr.Riviera
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Mr.Riviera

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PostSubject: Re: FAQ: Down Pipe Questions (Series I SC)   FAQ: Down Pipe Questions (Series I SC) - Page 2 EmptySat May 16, 2009 7:21 am

L67 wrote:
texasfan010 wrote:
I have a 96' riviera. I want to get a 3" DP, what would be the best thing to do?

ZZP 3" Shorty.

agree
and have a local shop weld it in.

_________________
1996 with 254k miles, L32 4" FWI -> ported N* -> Ported Gen V w/3.0" Pulley, Stage 3 Phenolic I/C, ZZP FMHE, 1.84 RR, Headers and 3" pipe to mufflers, F-body brakes, and lowered on Eibachs. -RIP
AMG C400 White on black -daily
FAQ: Down Pipe Questions (Series I SC) - Page 2 Dsc_0110
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texasfan010
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PostSubject: Re: FAQ: Down Pipe Questions (Series I SC)   FAQ: Down Pipe Questions (Series I SC) - Page 2 EmptySat May 16, 2009 12:01 pm

which one do i buy, the bonniville one?
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95rivy
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PostSubject: Re: FAQ: Down Pipe Questions (Series I SC)   FAQ: Down Pipe Questions (Series I SC) - Page 2 EmptySun Jan 02, 2011 9:50 am

So i have a question..how do you gain flow by going to a 3 inch down pipe when the opening at the mani is still the same? When it warms up outside i want to redo my whole system, so im trying to all the info and parts now..i dont mind welding and cutting..
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robotennis61
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PostSubject: Re: FAQ: Down Pipe Questions (Series I SC)   FAQ: Down Pipe Questions (Series I SC) - Page 2 EmptySun Jan 02, 2011 10:05 am

i think the system,once warmed up,the exhaust velocity speeds up.i could be wrong though. imo,its probably smarter to replace the entire length of pipe to 2.5 or 3". the 95 headers are really restrictive and we cant buy a quality header system for our year to benifit more from complete exhaust mods. with the 95 you have to customize everything....hows that grab ya?
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95rivy
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PostSubject: Re: FAQ: Down Pipe Questions (Series I SC)   FAQ: Down Pipe Questions (Series I SC) - Page 2 EmptySun Jan 02, 2011 10:29 am

Well i guess ill start with the 3" dp and go custom from there. thanks for the help.
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robotennis61
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PostSubject: Re: FAQ: Down Pipe Questions (Series I SC)   FAQ: Down Pipe Questions (Series I SC) - Page 2 EmptySun Jan 02, 2011 10:36 am

95rivy wrote:
Well i guess ill start with the 3" dp and go custom from there. thanks for the help.

i didnt know they made one to fit the 95?
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95rivy
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PostSubject: Re: FAQ: Down Pipe Questions (Series I SC)   FAQ: Down Pipe Questions (Series I SC) - Page 2 EmptySun Jan 02, 2011 5:11 pm

I just thought someone here made one fit from zzp..from the bonneville i think..but any way since we cant do headers on our year, is it worth doing a bigger down pipe?
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RidzRiv
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PostSubject: Re: FAQ: Down Pipe Questions (Series I SC)   FAQ: Down Pipe Questions (Series I SC) - Page 2 EmptySun Feb 13, 2011 6:20 pm

How could you attach a 3 inch downpipe to the manifold if it is set up to hook up to a 2.5 inch down pipe? does that flange taper off to a 2.5 diameter?
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RidzRiv
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PostSubject: Series 1 downpipe   FAQ: Down Pipe Questions (Series I SC) - Page 2 EmptySun Feb 13, 2011 6:39 pm

I was under the impression that the series 1 rivs and the series 2 had the same downpipe, and that the zzp downpipes would fit the series 1, is this the case?
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AA
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PostSubject: Re: FAQ: Down Pipe Questions (Series I SC)   FAQ: Down Pipe Questions (Series I SC) - Page 2 EmptySun Feb 13, 2011 7:50 pm

95rivy wrote:
So i have a question..how do you gain flow by going to a 3 inch down pipe when the opening at the mani is still the same? When it warms up outside i want to redo my whole system, so im trying to all the info and parts now..i dont mind welding and cutting..
You will see a gain because having 18" or so of free-flowing 3" downpipe is better than the 2" version installed at the factory. Doesn't matter if it's choked in upstream. Every inch of restriction adds up; every inch of free-flowing exhaust (especially upstream) increases horsepower.

_________________
'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch

^^^ SOLD ^^^ frown

'05 GTO • 85k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26
Because fun


'70 Olds Ninety-Eight Holiday Coupe • 116k miles • 455 Rocket V8
Because cool


'95 Celica • 152k miles • 0-60: yes
Because free
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talontyme
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FAQ: Down Pipe Questions (Series I SC) - Page 2 Empty
PostSubject: Re: FAQ: Down Pipe Questions (Series I SC)   FAQ: Down Pipe Questions (Series I SC) - Page 2 EmptySun Feb 13, 2011 10:26 pm

So did we ever come to a conclusion on what d/p will fit a 95 s/c riv?
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RidzRiv
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PostSubject: Re: FAQ: Down Pipe Questions (Series I SC)   FAQ: Down Pipe Questions (Series I SC) - Page 2 EmptySat Jun 25, 2011 12:28 pm

I am confused. does the 3 inch shorty fit on the 95 riviera? I was hoping it would bold up to my rear manifold and then i could have the other end welded without a cat
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Mr.Riviera
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PostSubject: Re: FAQ: Down Pipe Questions (Series I SC)   FAQ: Down Pipe Questions (Series I SC) - Page 2 EmptySat Jun 25, 2011 12:34 pm

it will not "bolt up" but it should fit. The same thing with the 96's. The flange was changed on the 97+ cars. You will need to take it to an exhaust shop to have them install it but it can be made to work with little effort.
My shop had to either remove the cat or move it down. I chose to have it removed because FL doesnt do emission checks.

_________________
1996 with 254k miles, L32 4" FWI -> ported N* -> Ported Gen V w/3.0" Pulley, Stage 3 Phenolic I/C, ZZP FMHE, 1.84 RR, Headers and 3" pipe to mufflers, F-body brakes, and lowered on Eibachs. -RIP
AMG C400 White on black -daily
FAQ: Down Pipe Questions (Series I SC) - Page 2 Dsc_0110
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RidzRiv
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PostSubject: Re: FAQ: Down Pipe Questions (Series I SC)   FAQ: Down Pipe Questions (Series I SC) - Page 2 EmptySat Jun 25, 2011 12:46 pm

how does the exhaust shop get the flanges to line up? do they weld a different flange on to the shorty?
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Mr.Riviera
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Mr.Riviera

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PostSubject: Re: FAQ: Down Pipe Questions (Series I SC)   FAQ: Down Pipe Questions (Series I SC) - Page 2 EmptySat Jun 25, 2011 2:40 pm

it lines up well enough to bolt at the top. There is a difference in doughnut gaskets used and i really dont remember all the details (it was 4 years ago for me) any exhaust shop can install it for you or if you know how to weld then you can do it yourself. Just dont order it expecting it to be a bolt-in application.

_________________
1996 with 254k miles, L32 4" FWI -> ported N* -> Ported Gen V w/3.0" Pulley, Stage 3 Phenolic I/C, ZZP FMHE, 1.84 RR, Headers and 3" pipe to mufflers, F-body brakes, and lowered on Eibachs. -RIP
AMG C400 White on black -daily
FAQ: Down Pipe Questions (Series I SC) - Page 2 Dsc_0110
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AA
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FAQ: Down Pipe Questions (Series I SC) - Page 2 Empty
PostSubject: Re: FAQ: Down Pipe Questions (Series I SC)   FAQ: Down Pipe Questions (Series I SC) - Page 2 EmptySat Jun 25, 2011 5:02 pm

I wouldn't use the flanges. If you're going to be cutting and welding pipe, just weld in a venturi reducer like this one:

FAQ: Down Pipe Questions (Series I SC) - Page 2 Flo

_________________
'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch

^^^ SOLD ^^^ frown

'05 GTO • 85k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26
Because fun


'70 Olds Ninety-Eight Holiday Coupe • 116k miles • 455 Rocket V8
Because cool


'95 Celica • 152k miles • 0-60: yes
Because free
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http://www.cardomain.com/ride/657082/4
Mr.Riviera
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Mr.Riviera

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FAQ: Down Pipe Questions (Series I SC) - Page 2 Empty
PostSubject: Re: FAQ: Down Pipe Questions (Series I SC)   FAQ: Down Pipe Questions (Series I SC) - Page 2 EmptySat Jun 25, 2011 5:08 pm

i was referring to the upper flange (only one on the 96's). I think the 97+ rivs had a rear flange like the w-bodys.
regardless, that reducer is a good way to join the rest of the exhaust system to the DP.

_________________
1996 with 254k miles, L32 4" FWI -> ported N* -> Ported Gen V w/3.0" Pulley, Stage 3 Phenolic I/C, ZZP FMHE, 1.84 RR, Headers and 3" pipe to mufflers, F-body brakes, and lowered on Eibachs. -RIP
AMG C400 White on black -daily
FAQ: Down Pipe Questions (Series I SC) - Page 2 Dsc_0110
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RidzRiv
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PostSubject: Re: FAQ: Down Pipe Questions (Series I SC)   FAQ: Down Pipe Questions (Series I SC) - Page 2 EmptySat Jun 25, 2011 8:08 pm

Awsome! i was thinking i would need to buy a reducer. How much would you expect to pay to have the downpipe attached to the manifold and the reducer to be welded in at a muffler shop?
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