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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 06-03-2003, 06:23 PM   #1
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Default Help with my modifications

Just bought a 2003 ssei : what would these things do as far a hp and torque and my 0-60 speed and will it hurt the car.... 180 therm & does it have to be drilled and if so why, pulley 3.4, gatorback belts, gutted airbox, k&n filter, platinum tipped spark plugs, jet chip or DHP chip, & taylor 8mm spark plug wires, do I need all these things or no, please help and at how many miles would you install this stuff, the car has 150 miles on it, thanks.

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Old 06-03-2003, 06:37 PM   #2
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Welcome, Hockey!

The only thing I would caution you on is the use of the K&N and the use of Platinum plugs. This is not from first hand experience, mind you, so take it as you may. I have heard a bit of controversy regarding the K&N filters. They are designed to allow the maximum air flow--and in this they do wonders. The problem may arise in their ability to filter. Do the research and make the decision based on your findings.

The other issue is with the Platinum plugs. I use them in my */C'ed engine and they work fine, however, I am not modded yet. The concern is that the L67 runs too hot and may wear the platinum prematurely. The only problem I have had with Platinum plugs was when I tried running Bosch Platinums. They failed within three months. With a modded engine, you will presumably be running it a bit harder, and thus may wear them premature. This only applies to the L67. Platinums are great for the L27 and the L36.

I would also recommend installing a second auxillary tranny cooler. For more info, check out the "Techinfo" section at the very top of your screen.

As for actual gains, no one can tell you in hard numbers, because that requires a dyno--which is very expensive. I can tell you that it will make a vast improvement over stock--and by the "Seat of the pants dyno", to borrow a phrase.

I would definately wait until after the "break-in" period.
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Old 06-03-2003, 06:44 PM   #3
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Quote:
Originally Posted by 95BonnevilleSESC
Welcome, Hockey!

The other issue is with the Platinum plugs. I use them in my */C'ed engine and they work fine, however, I am not modded yet. The concern is that the L67 runs too hot and may wear the platinum prematurely. The only problem I have had with Platinum plugs was when I tried running Bosch Platinums. They failed within three months. With a modded engine, you will presumably be running it a bit harder, and thus may wear them premature. This only applies to the L67. Platinums are great for the L27 and the L36.
would you want to be going into a little more detail with me on this, because I put double platinum plugs in about a month ago and now I am starting to put a couple mods in.
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Old 06-03-2003, 06:47 PM   #4
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Copper is your best bet with an L67. The platinum gets too hot and wears out. That is all there is to it. :(

But don't go changing your plugs until you have to.
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Old 06-03-2003, 07:55 PM   #5
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What plugs work best for us NA boys and girls???
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Old 06-03-2003, 08:13 PM   #6
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OEM'*...Delco, nothing better, I think NGK Iridiums are really Delco or something...I dunno, at any rate, stay with the stockers...OEM is good
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Old 06-03-2003, 09:16 PM   #7
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Ac Delco Platinums are the same as NGK Iridium IV. Those would be your best bet for N/A'* along with Splitfires. Being and */C'd I haven't changed plugs yet.. as I"m also debating over platinums or Copper. Copper tends to wear out quicker then Platinum but the added safety of Copper is that the plugs will foul up thus not allowing spark when you get into cases of pre detonation ( knock ). So in a sense.. you'd rather blow a plug or two then a cylinder or two if you run into high knock ( pre-detonation ). IF you don't think you'll be runnin into KR ( Knock Retard ) you may try the platinum for longer life and durability.. but be forwarned.. a few extra hours of changing plugs and a few cents cheaper per plug again is way way cheaper then a new engine. The T-stat doesn't need to be drilled.. ppl drill them to help cool the engine a lil bit better before the stated temp of 180 ( or 195 stock ). Isn't necessary at the moment. This will also affect your warm up time too ( however it'* very little a minute or 2 the most extra is needed ) As for the mods such as pulley change and HP gaining options.. I would hold off till you have properly broken in your engine. ( personal preference of 2 oil changes worth at least to allow proper mating and seatings of all components )

But the tranny cooler and Tstat now wouldn't hurt.

Welcome aboard
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Old 06-04-2003, 01:46 AM   #8
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Quote:
pulley 3.4, gatorback belts, gutted airbox, k&n filter, platinum tipped spark plugs, jet chip or DHP chip, & taylor 8mm spark
A list of which will give you the biggest difference in power
1. Pulley or K&N cone filter with a custom intake tube, dont worry about K&Ns filtration, on the average they are about .5% less than the best paper filters. So they are like 98%-99% effective.
2. The custom chip, make sure you get a good quality. And as drifter said, make sure you take it easy on your car for the dealers suggested time.

I would also check in my documentation/dealer to make sure I am not voiding any warranties when installing anything custom.
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Old 06-05-2003, 12:54 AM   #9
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Quote:
Just bought a 2003 ssei : what would these things do as far a hp and torque and my 0-60 speed and will it hurt the car.... 180 therm & does it have to be drilled and if so why, pulley 3.4, gatorback belts, gutted airbox, k&n filter, platinum tipped spark plugs, jet chip or DHP chip, & taylor 8mm spark plug wires, do I need all these things or no, please help and at how many miles would you install this stuff, the car has 150 miles on it, thanks.
If you installed a 180 t-stat I would drill it. What drilling it does, is let the coolant circulate through the system when the t-stat isn't open, so you are always getting a little bit of cooling. That way it takes longer for the engine to heat up, so it is colder more, and it will make more power. Some people don't know this, but the stock 195 t-stat is drilled from the factory, or at least it was in our SSEi and GTP. A 3.4 pulley should get you a good 20hp and 35lb. ft at the wheels. Gatorback belts aren't going to do much for you, because they don't grip much better, if any better, than normal belts. A K&N Air Filter would be a good move, and gutting the airbox will really let the K&N Filter breathe a lot better. I would definately get Platinum Plugs, probably 1 heat range colder than the stock plugs. The reason I say platinum is because they last 8-10 times longer than copper. Platinums last 80-100K, whereas coppers last 10-15K, and as long as you aren't running regular gas (I am assuming you use premium gas), you should have no problem at all running platinum plugs. If the Platinum Plugs are so much worse than the copper, then why would GM install them factory? They do not make a DHP for the Bonneville, but I would definately get the stock computer replaced because it is JUNK. The Spark Plug wires aren't going to give you any power performance wise, but it is probably not a bad idea to install nicer wires when putting in new plugs, and it may be tough to get the stock wires out in one piece, because they break easily. Together you will get between 20 and 30 horsepower from all of that stuff.
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