LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Horsepower question

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Old 06-11-2007, 12:28 PM
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Default Horsepower question

hey guys i got a 1997 Trans Am WS6 and im adding some **** to it and i was wondering if you guys could give me a rough estimate on about how much hp im going to be tacking on to it.
k the list is:

160 thermostat
K&N air filter for my engine (Ram Air)
K&N air filter
Borla adjustable exhaust
Pacesetter headers LT's

thats the list so far. how much hp is it going to be adding?

im also thinking about switch my rear gear ratios to 3.73:1, but i heard thats gonna gimme shitty gas mileage. Would changing the rear gear ratios gimme alotta hp or no?

and does dyno tuning it add more hp? if so how much?
Old 06-11-2007, 12:34 PM
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change the gears you wont regret it as for the mods list i would say anywere from 300-310rwhp get a tune to go with it.
Old 06-11-2007, 12:42 PM
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im gonna b adding 300rwhp??? or is that gonna be around my total after i get it done?

and what's the starting rwhp on a 97 WS6 (sry, im new to this car stuff)

what bout the gas mileage if i change my gears? same or lower?
Old 06-11-2007, 12:43 PM
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Around 20-25
Old 06-11-2007, 12:47 PM
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you will be at about 300-310rwhp most LT1s dyno at 280rwhp and 310rwtq. so after all those mods plus gears i would say 300-310rwhp and around 330rwtq maybe more. gas millage really wont be hurt that much. depends on how you drive.
Old 06-11-2007, 01:13 PM
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k thx guys

and im really stupid when it comes to cars so maybe someone can explain this to me

the car has 330 hp so is that different that the rwhp? or is the rwhp the same as the hp?
Old 06-11-2007, 01:25 PM
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gears don't add horsepower, its a mathematical increase in acceleration, they work best with sticky tires. same horsepower going to them but the car will accelerate faster because it makes the wheels turn more/faster.
Old 06-11-2007, 02:20 PM
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330hp is the estimated flywheel hp. which is power at the motor then you get rwhp which is the power to the wheels after a percentage of drive train loss. You did not mention if you were a auto or manual so there is a difference with the 2. if a manual you will see a better rwhp gain then the auto.
Old 06-11-2007, 03:05 PM
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o no im an auto
so i could have like 350-360 "hp" after all that **** but my rwhp would be like 320-330?
is that right?
Old 06-11-2007, 03:33 PM
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For an auto take off 20% drivetrain loss due to friction...for a manual take off 15%...subtract that from the crank horsepower and you get approx. RWHP.
Old 06-11-2007, 03:57 PM
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yeah i'd say about 30-35 hp..... most of it coming from the long tubes..... gears would be the next obvious addition to this car's setup..... And yes flywheel hp is the 330 number... your rearwheel hp is going to be about 15-20% less than that because of all the parasitic losses turning the flywheel, converter, tranny, driveshaft, and rearend/axles/tires.... what you see at the tires is how much you put to the ground.... it's more realistic horsepower...
Old 06-11-2007, 04:21 PM
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k thx alot guys
im learning alot thanks to u guys
i also got a question in stereo and electronics if any of u know much bout 97 trans am WS6 speakers and head units

THX!!!




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