need some advice on somethings... - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 07-23-2003, 06:11 PM   #1
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sup everyone
my car turned 221,000 miles yesterday (orig engine and tranny and runs great)
heres the deal:
by the end of this summer there are a few things i want to do to my bonnie, right now im adding four H3 Xenon fog lights (55W each bulb). thats going to be drawing alot of juice from the alt. also i will be getting a new head unit (Clarion DXZ 835MP) and a decent size sub put in. i was wondering if i will be needing a bigger alternator to power these beasts (esp when they are all on at the same time) ? dont right now we have a 45 amp alt ??? (im guessing). i will also be adding another high speed fan to the radiator (it gets hot towing my goodies over the mountains )
also:
i plan on getting the intake manifold ported and the throttle body ported as well and was wondering what the pros/cons were? say hp and torque and in what ranges they are in, fuel economy, etc.

if anyone has anything to say feel free to respond!!

ps. im taking my car to a "Dyno Day" at a local dyno shop to get dyno'd for 40 bucks! ill update you guys when i do it and post a link and you will be able to see the hp, torque, fuel/air ratio through every rpm along wiht he cool graphs.
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Old 07-23-2003, 07:56 PM   #2
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Glad to hear it'* still serving you well!

As far as the altenator goes, i beleive that it is closer to 90 amps, but the gurus will prolly have a more accurate number. We've been through 5 or so altenators in the almost-16 year history with the car, so they do have a decent propensity to burn out.

90 amp is only the stock rating - you should be able to find ones that will fit the engine which will generate more amperage. I believe a few people here in the forum have done it before.

Slightly off topic, what did you do for the homemade ram-air?
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Old 07-23-2003, 08:18 PM   #3
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Have found two different alternators, small diameter and large. The small diameter leaves lots of room to route plug wires under & fails about every 2 years. The large one doesn't.

Without torque you have no horsepower.
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Old 07-23-2003, 08:38 PM   #4
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Still factory??? Wow - impressive!

Yah, its easy to get the alt out - got it down to a ~15 minute procedure. Maybe its cuz im using the ghetto rebuilt ones from Canadian Tire... At least they have a 5 year warranty, so dont have to pay for replacements
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Old 07-24-2003, 12:20 AM   #5
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ok jr, i found the K-rpo code and looked it up (K6 and its a 105 amper. i think i can get by with it but it will likely shorten the life time on it, so ill prolly go with a bigger alt.

lazicn, in answer to your question about the ram air: basically i took some 4in dryer duct from the local hardware store, cut a whole in the air dam (engine still stays cool), and bent it around so it was facing forward to suck air in. then i ran it behind the driver side headlight (tight but nice fit) and then right next to the snorkle of the air intake. i left a gap between the two so it can suck in air easier when theres no air ram effect of the tubing. to keep it put i cut up a piece of sheet metal into a strip and bolted it in place. the best thing is, IT WORKS, only at free way speeds but i can definatly feel a power increase at those speeds. i am able to accelerate better while staying in OD. My fuel economy hasnt changed, so everyone should do it

does anyone have anything to say about the porting of the intake!!
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Old 07-24-2003, 02:45 AM   #6
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There was two alternators available (105A & 120A) but the bad news is not only are they different diameters, they have different mounting points & use slightly different brackets too. The 120A version is a rare one too, goes with the even rarer heated windshield option which needs this kind of power!
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