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Old 04-01-2007, 03:02 AM   #1
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Default IRP & Series 1 headers

Hello again. I've had a lot of fun with my car running just fine, but I think I'm going to tear it up this Tuesday. Here'* hoping.

I had it stock for a bit because I had just recently gotten it to work. This hasn't been a great time of income, but I've done what I could. I worked mainly on safety and such, but this Tuesday, my friends and I are going to IRP (Indianapolis Raceway Park).

I had already had 1337ssei and his dad take off my SC to replace the gears and clean out the carbon. After almost 283K miles, my car needs needs a few things done to it, I believe... Also, I got .55-gapped NGK iridium plugs in a while ago, and that smoothed out my idle. I have a 3-inch brand new exhaust pipe, but the cat and muffler are stock. If I can manage to get a Magnaflow or Flowmaster by Tuesday, I'm all set.

On Monday, I'm going to scour junkyards for a 1993 SSEi SC pulley because I've heard it'* 2.65" as opposed to the 2.8" for the 1994 series 1'* SC. If I can get it, I will make sure it spins fine, and then I'll use it on Tuesday. I want to drop the pulley to a much smaller size, and I've joked with some friends that I'll just put grooves into the SC shaft and run it bare. This is where the headers come in.

Headers
I've heard why there are no headers available for me, so I was wondering about doing headers 1 of 2 ways:
1.) Get GP headers; I could weld away at it until I get the mid to move over so it fits my engine.
2.) Same as above or varied as prescribed by comments, but with a true dual exhaust.

Finally, I put on a K&N conical filter today, but it just has a $20 plastic flexible tube going to a 3"-4" adapter for the throttle body. Regardless, the whine is fantastic, and I have more performance. In reference to all of the aforementioned goods, what else could I do for Tuesday? I have good but generic plug wires for now, but I'm not sure I'd like to invest into MSD or the like just yet. Any suggestions?
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Old 04-01-2007, 03:49 AM   #2
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The series 1 manifold already flow very well. Yours would probably benefit from some porting but headers aren't needed. Look at WillWren'* car he has taken the S1 farther then anyone else here yet still has stock manifold (aside from the porting.)


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Old 04-01-2007, 04:23 AM   #3
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You can't weld away at a set of headers to make them fit your engine............
Custom headers will cost over a G.

Grind the welds out on the inside of your manifolds and tack them on the outside while bolted down. That will help out flow plenty.
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Old 04-01-2007, 11:06 AM   #4
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Someone replaced the GEARS in your SC? Without a factory alignment jig? Can you double-check on the work that was done?

How/why did you replace what pipe with 3", and how/why did you keep the stock cat and muffler with 2.5? 3" exhaust on a Series 1 will lose bottom end. It'* already been proven. But I'm not clear on what you're trying to say.

Your pulley is 2.85". 91-93 are 2.55. Do you own a scantool? Do you know your fuel pressure? Have you repaired your cracks in the exhaust manifolds? Remove them, then remove the heat shields. You'll find cracks.

You'll very likely have KR with the 2.5" pulley, and you don't have any supporting mods to go smaller than that. Nor can you outflow your stock manifolds if you port them.

Supercharger pulleys are not plug-play devices. You need to do alot of work to get them to run right on your car. If you don't do your homework, you'll actually lose power and cause damage to the engine. Please read this Techinfo article:

http://www.bonnevilleclub.com/forum/...=article&k=104

Follow that step-by-step. The last guy that didn't follow our advice blew a hole in the #6 piston.

And at 283k miles, I'd be more determined to replace my transmission than I would to add power.
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Old 04-02-2007, 01:07 AM   #5
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That'* a whole lot of info, and thanks a lot for that. My transmission actually has about 20K-30K miles on it. It was replaced before I got the car, and it feels pretty good.

I ran Seafoam through the vacuum lines, and I know that I have cracks in the manifold. The reason I have a 3" exhaust is because Ralph'* muffler gave me a free "upgrade" since my original had rotted away quite nicely. Though they originally needed to fix the "exhaust leak," they ended up replacing the line.

The engine was rebuilt 100K miles ago, and it runs fine. Thakns for covering the pulley size ordeal, and i'll re-read your post to see what else I can comment on.
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Old 04-02-2007, 01:39 AM   #6
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All right, I'll keep the stock manifold. Thanks a whole lot for that tip.

"Someone replaced the GEARS in your SC? Without a factory alignment jig? Can you double-check on the work that was done?"
-I've been told that this regearing was done, and I have pictures of the supercharger in a kitchen sink. I saw the carbon being cleaned out, and there was a lot of it before the cleaning. The SC is still black on the inside, but its walls are smooth.

I'm considering getting a new, high flow fuel pump & replacing the fuel filter. 1337ssei got a more powerful pump for his 97 SSEi, and his car is much more jumpy now. I'm pretty sure that there might be another step I need to take before I can get another fuel pump, but I would really like to do that based on the results 1337 got. I have a few friends with scan tools, and I'm going to check up on my engine Monday afternoon & Tuesday morning.

To cover the Techinfo step #1:
- New iridium plugs & new wires.
- The oxygen sensor tested out fine, and it works. Is this good enough?
- I am going to change the fuel filter tomorrow because I don't know how old it is.
- I have a new PCV valve with a new gasket. 1337seei'* dad had to go over 30 miles to pick up the gasket. He'* awesome.
- I have a new K&N filter, and I'm planning to make a heat shield for it and for the duct out of that metallic-looking bubble wrap.

"You'll very likely have KR with the 2.5" pulley, and you don't have any supporting mods to go smaller than that. Nor can you outflow your stock manifolds if you port them."
--I read the pulley upgrade MUST READ, and I'm going to keep an eye out for KR. I've got the entire first step down, and the car is running great. Fuel pressure will be done tomorrow, and I hope to get a higher pressure if that'll help performance enough.

Since you mentioned the stock cat & muffler with the exhaust pipe not being a good idea, I'd like to focus on that tomorrow afternoon. There are nearby tuning places that I'll scour for a Flowmaster or Magnaflow.
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Old 04-02-2007, 02:51 AM   #7
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Im surprised no one else mentioned this, but obtaining a Magnaflow or Flowmaster mufler will not improve your performance one bit. Some of the fastest cars on this forum are still running stock mufflers. Rogue'* 12-second SSEi is still on stock mufflers. They will only improve your sound, which if thats what youre after go for it, but if you want performance spend the money elsewhere.
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Old 04-02-2007, 08:12 AM   #8
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The only way a fuel pump will make a noticable gain is if it has LOST pressure to begin with.

Please check your fuel pressure before shotgunning the pump. I still don't understand what part of your exhuast is 3", but if it was a 'free upgrade' you got ripped off by an idiot. I suggest you go back to 2.5", and have the catalytic converter checked for flow at the same time.

I'd like to see the pics in the kitchen sink. I strongly suspect nobody 're-geared' your supercharger. I'd still like to know exactly what was done, and who did the work. Nobody on this Forum is qualified or even remotely capable of re-gearing a supercharger. Not even me, and I've rebuilt more than anyone here.
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Old 04-02-2007, 07:51 PM   #9
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as far as the exhaust will im bettin that they just upsized it after the cat to 3" and ran it back to the muffler then downsized it back to 2.5", i dont think thats gonna cause anything but some turbulance and worse flow. willwren is right 2.5" will do you just fine, heck ill be runnin my stock 2.25 single outlet exhaust on my regal for a while with an upgraded downpipe.
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Old 04-03-2007, 01:57 PM   #10
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I figured I could finish the 3" job Ralph'* Muffler & Brake started, but it seems not to be so necessary. I found a $79.99 Firebird-oriented cat with a 3" in and out, and I think that'* a bit too expensive. I've heard I can get a Flowmaster kit for $80 before shipping, and that'* a better deal, I think.

I originally figured I'd get a pretty cool exhaust because it wouldn't hinder future upgrades, but it seems I really wouldn't need to. When, in general, would I need to consider something that allows more flow?
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