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Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 05-29-2009, 11:49 AM   #11
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Once you open up the valve train I suggest concentrating on the exhaust system. Headers, or Plog with a new down pipe and free flow cat and you will be all set.
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Old 05-29-2009, 12:39 PM   #12
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Yeah im kinda doing things in my own jacked up order. my focus is currently on the exhaust> i had a long convo with purple about hi flo cats the other day. I'll be purchasing one within the next week. I do think im gonna go ahead and open the down pipe up to 3", meaning i'll need a hi flo cat with a 3" inlet and outlet, right? Just of the top of your head do you know how much it is to install new 3" down pipe and straight pipe to the Y?
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Old 05-29-2009, 04:32 PM   #13
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That will depend on the shop. I know a guy I went to auto school with at a exhaust shop so I get a deal. Got mine welded in place for $50.
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Old 05-29-2009, 07:36 PM   #14
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can you do this to an N/A engine? sorry for thread jackingish but its relevant
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Old 05-29-2009, 07:42 PM   #15
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Yes you can, but looking at your sig, you have a 93. I'm not sure if there are high ratio rockers for that engine. Billboost will have the answer on that.
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Old 05-29-2009, 11:23 PM   #16
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Quote:
Originally Posted by Danthurs View Post
Yes you can, but looking at your sig, you have a 93. I'm not sure if there are high ratio rockers for that engine. Billboost will have the answer on that.
well my dad has an 04 buick lesabre that also has the series 2 in it, thats why im asking. we were talking about doing the 1.9:1 change but his concern is that he wants to keep his mileage up, hou would this effect it?

and i am curious about the series one rockers too billbost, that information would be useful
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Old 05-29-2009, 11:26 PM   #17
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Installing 1.9:1 rockers will not hurt your millage. The evil right foot will do that.
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Old 05-29-2009, 11:54 PM   #18
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lol, would it be something that would be a noticable preformance gain? how hard is it to change the valve springs?
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Old 05-30-2009, 12:05 AM   #19
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I second the curiousity on IF the 1.9s would work on a series 1... looking at the upgrade after the pulley swap... i hate the mod bug... it bites sooooo good lol
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Old 05-30-2009, 12:29 AM   #20
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what about 1.95:1 rockers, would you have to modify the piston head or something? i saw them on intense'* webby just curious
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