Question about horse power
Question about horse power
Manufacturers of high perf. parts like plenum spacers, high flow intake, cat back exhaust claim their parts will increase HP. When all these parts are installed, do you add up the claimed HP? give or take a few.
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superDorifto
- Posts: 1306
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- Car: 1997 Eclipse Spyder - AWD/5spd swap in progress
1995 Q45 - 5spd swap in progress
1984 200sx hatch(KA-t swap) - 355WHP
1991/1993/1995/1997 240s - Dead
1982 200sx hatch - fixed/scrapped - Location: CT
Re: Question about horse power (ocho)
no...its not a math problem
lets see...I have a cat back...thats 40hpand a cold air intake....thats another 15hp...WRONG
most bolt on parts like exhausts and intakes and the like help to let the engine breathe a little better. Its not that youre ADDING hp, youre just adjusting how well your motor can use the power it has.
To really add hp you need one thing.....MONEY
rebuilding the motor with a higher compression ratio or adding nitrous/forced induction is the only way to really make more power.
lets see...I have a cat back...thats 40hpand a cold air intake....thats another 15hp...WRONG
most bolt on parts like exhausts and intakes and the like help to let the engine breathe a little better. Its not that youre ADDING hp, youre just adjusting how well your motor can use the power it has.
To really add hp you need one thing.....MONEY
rebuilding the motor with a higher compression ratio or adding nitrous/forced induction is the only way to really make more power.
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gjohnson66
- Posts: 103
- Joined: Wed May 17, 2006 7:32 am
- Car: 2005 G35 6MT Coupe
Re: Question about horse power (ocho)
I agree with SuperDorifto except to say that if you don't happen to have $15-20k lying around to properly put in a forced induction set-up (meaning a TT setup and the forged internals on the engine to handle the added boost), then the bolt-ons are they way to go.
Think of the bolt-ons as free-ing up hp that was already there...
Think of the bolt-ons as free-ing up hp that was already there...
Remember that aftermarket manufactures usually get their numbers in perfect conditions. Also, you don't add the numbers claimed for each part. The total HP increase will always be less than claimed if you already have other aftermarket parts installed.
If you completely upgraded your intake and exhaust, while keeping emissions ok, I would be very surprised to see a HP increase of over 30.
To get real power, step up to forced induction. The VQ35 will handle up to 400HP before you need forged...so a supercharger and exhaust could be installed for 4k or so. Any more power, and your cost will go up exponentially.
If you completely upgraded your intake and exhaust, while keeping emissions ok, I would be very surprised to see a HP increase of over 30.
To get real power, step up to forced induction. The VQ35 will handle up to 400HP before you need forged...so a supercharger and exhaust could be installed for 4k or so. Any more power, and your cost will go up exponentially.
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Q45tech
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- Car: 1990 Q45 342,400 miles 22 years ownership with original engine
1995 G20t 5 speed 334,000 miles 16" 2002 wheels - 205/50/16 Sr20ve vvl
Re: (joe603)
Engineers reserve SAFETY POWER to increase longevity to meet warranty requirement.................usually easy to find 5% and possible to find another 5% if longevity is decreased.
If you only require a 500 mile engine life [think NASCAR] think of the possible power output possible.
If you only require a 500 mile engine life [think NASCAR] think of the possible power output possible.
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superDorifto
- Posts: 1306
- Joined: Mon Jun 13, 2005 1:13 pm
- Car: 1997 Eclipse Spyder - AWD/5spd swap in progress
1995 Q45 - 5spd swap in progress
1984 200sx hatch(KA-t swap) - 355WHP
1991/1993/1995/1997 240s - Dead
1982 200sx hatch - fixed/scrapped - Location: CT
Re: (Q45tech)
youre gonna get the most benifits by decreasing rotating mass...ie flywheel, lightweight forged wheels, underdrive pullies, and a light weight driveshaft...those changes alone will make your car FEEL a lot more powerful.
and 15-20k is a real high estimate. without the cost of tools, and if you do most of the work yourself, almost any motor can be built to around 400hp for less then 10k...trust me, ive made countless spreadsheets and crunched the numbers many times before i settled on my current build.
right now, im building an SR for 350 daily driven hp...costing me around $5500 with all of the supporting mods, minus the cost of the engine set ($1300)
and 15-20k is a real high estimate. without the cost of tools, and if you do most of the work yourself, almost any motor can be built to around 400hp for less then 10k...trust me, ive made countless spreadsheets and crunched the numbers many times before i settled on my current build.
right now, im building an SR for 350 daily driven hp...costing me around $5500 with all of the supporting mods, minus the cost of the engine set ($1300)