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N/A Horsepower reality check

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Old May 20, 2009 | 07:19 AM
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Default N/A Horsepower reality check

Countless hours researching aftermarket products produced the realization that 300 whp is pretty much impossible to achieve on a conservative budget and on an N/A platform. But is a solid 275 whp to much to ask for? Why do so many people insist that they are producing this mythical number of around 300 using CAI's, Cat-Backs and a re-flash? Is it merely because it's what the manufacture states or is it because they spent an entire weekend on the dyno laying down runs under as many variables as possible? Sometimes I feel people create these claims just to make the next guy feel like he is doing something wrong.
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Old May 20, 2009 | 07:22 AM
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^its probly cuz they have the HR motor lol
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Old May 20, 2009 | 07:28 AM
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^+1 haha
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Old May 20, 2009 | 07:45 AM
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The same reason 400 sounds nicer then 375, and 500 sounds better then 475, so on and so forth. Our math system is based on a system of 10, do the math.
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Old May 20, 2009 | 07:49 AM
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Originally Posted by ZGermany
Countless hours researching aftermarket products produced the realization that 300 whp is pretty much impossible to achieve on a conservative budget and on an N/A platform. But is a solid 275 whp to much to ask for? Why do so many people insist that they are producing this mythical number of around 300 using CAI's, Cat-Backs and a re-flash? Is it merely because it's what the manufacture states or is it because they spent an entire weekend on the dyno laying down runs under as many variables as possible? Sometimes I feel people create these claims just to make the next guy feel like he is doing something wrong.
Because there isn't an intelligence test required prior to purchase an automobile.

Last edited by Jeff92se; May 20, 2009 at 10:14 AM.
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Old May 20, 2009 | 08:02 AM
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Originally Posted by Jeff92se
Because there isn't an intelligence test required prior to purchasing an automobile.
because one person who gets his car dyno'd on a EBDyno (Ego Booster Dyno) that puts out inflated numbers, all the other sheep flock to together and believe.
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Old May 20, 2009 | 08:16 AM
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And alot of people don't realize what whp is! My old roomate used to start with his baseline bhp and add the amounts the aftermarket Mfg. stated he would realize to it! Couldn't tell him otherwise.
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Old May 20, 2009 | 08:24 AM
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Generally, power modes on Z's NA motor is an exercise in futility for most people. And when I say most, I mean people that will not do things that significantly change VE of the engine that would yield results worth writing home about. Let's do quick and conservative math:

catback exhaust: $1000
plenum spacer: $250
headers: $1000
tune: $1000

For over $3K, you may get extra 30hp, maybe. LOL. That's $100 per pony which is expensive in my book. And I am not even going to start with the fact that once you go faster, you need to stop faster (brakes) and be able to hold that power down at the pavement (suspension). More money. Why bother?

I think on a Z, you're better off just putting that money into suspension and brakes which, in essence, are free power. IMHO, money well spent with very rewarding results.

All I just said does not stop people from throwing lots of money at power mods for bragging rights. Whether that's smart or not is at least a 5 beer conversation.

Last edited by Ziggyrama; May 20, 2009 at 08:26 AM.
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Old May 20, 2009 | 08:28 AM
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Originally Posted by Ziggyrama
Whether that's smart or not is at least a 5 beer conversation.
Well put. You are right though might as well save for a built motor and TT.
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Old May 20, 2009 | 08:49 AM
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You must be talking about the dyno racers. Its an odd bunch of guys. But they do save money on tires.
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Old May 20, 2009 | 08:50 AM
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[QUOTE=Ziggyrama;7347787]Generally, power modes on Z's NA motor is an exercise in futility for most people. And when I say most, I mean people that will not do things that significantly change VE of the engine that would yield results worth writing home about. Let's do quick and conservative math:

catback exhaust: $1000
plenum spacer: $250
headers: $1000
tune: $1000

For over $3K, you may get extra 30hp, maybe. LOL. That's $100 per pony which is expensive in my book. And I am not even going to start with the fact that once you go faster, you need to stop faster (brakes) and be able to hold that power down at the pavement (suspension). More money. Why bother?
[QUOTE]

I plan on doing all of the bolt ons on my Z... not to make it necessarily faster, but just because I want to. My Z isn't a race car, I don't race people in it, I just enjoy driving it. I think that extra 30hp is what the car really needed from the get go, which is evidenced by the fact that the VQ37HR is loved just that much more than the VQ35HR. I also believe its very possible to hit 300whp on a RevUp motor as they dyno typically in the 265whp range stock. Between a full, proper exhaust including headers, intake manifold mods, perhaps a pulley, and a proper tune, theres really no reason it can't. I'm not going to be disappointed if I hit 280-285, or wahtever I hit really. I want the car to run 12.8's. Wether this is a 150hp car or a 600hp car, I don't care. 12.8's is my goal.
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Old May 20, 2009 | 09:05 AM
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Originally Posted by Ziggyrama
Generally, power modes on Z's NA motor is an exercise in futility for most people. And when I say most, I mean people that will not do things that significantly change VE of the engine that would yield results worth writing home about. Let's do quick and conservative math:

catback exhaust: $1000
plenum spacer: $250
headers: $1000
tune: $1000

For over $3K, you may get extra 30hp, maybe. LOL. That's $100 per pony which is expensive in my book. And I am not even going to start with the fact that once you go faster, you need to stop faster (brakes) and be able to hold that power down at the pavement (suspension). More money. Why bother?

I think on a Z, you're better off just putting that money into suspension and brakes which, in essence, are free power. IMHO, money well spent with very rewarding results.

All I just said does not stop people from throwing lots of money at power mods for bragging rights. Whether that's smart or not is at least a 5 beer conversation.
Extremely well said! Dyno numbers are just so much smoke and mirrors anyway.
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Old May 20, 2009 | 09:24 AM
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Originally Posted by davidv
You must be talking about the dyno racers. Its an odd bunch of guys. But they do save money on tires.

Does both.......lol . Do you usually run at Cecil Davidv?
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Old May 20, 2009 | 09:25 AM
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It depends. I've seen people on here tell others that __ doesn't make any power, don't do it, when X people have done it, and have had gains. I think people are in a mindset that because N/A parts don't yield as much gains as FI, that the gains are insignificant to non existent. And that simply isn't true.
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Old May 20, 2009 | 09:26 AM
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[QUOTE=icase81;7347908][QUOTE=Ziggyrama;7347787]Generally, power modes on Z's NA motor is an exercise in futility for most people. And when I say most, I mean people that will not do things that significantly change VE of the engine that would yield results worth writing home about. Let's do quick and conservative math:

catback exhaust: $1000
plenum spacer: $250
headers: $1000
tune: $1000

For over $3K, you may get extra 30hp, maybe. LOL. That's $100 per pony which is expensive in my book. And I am not even going to start with the fact that once you go faster, you need to stop faster (brakes) and be able to hold that power down at the pavement (suspension). More money. Why bother?

I plan on doing all of the bolt ons on my Z... not to make it necessarily faster, but just because I want to. My Z isn't a race car, I don't race people in it, I just enjoy driving it. I think that extra 30hp is what the car really needed from the get go, which is evidenced by the fact that the VQ37HR is loved just that much more than the VQ35HR. I also believe its very possible to hit 300whp on a RevUp motor as they dyno typically in the 265whp range stock. Between a full, proper exhaust including headers, intake manifold mods, perhaps a pulley, and a proper tune, theres really no reason it can't. I'm not going to be disappointed if I hit 280-285, or wahtever I hit really. I want the car to run 12.8's. Wether this is a 150hp car or a 600hp car, I don't care. 12.8's is my goal.
I have never, ever seen a rev-up dyno anywhere near 265 stock. More like 245 (as opposed to 235-240 for a stock non-rev). I think you are thinking of an HR. Good luck on 12.8's out of a rev-up.
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Old May 20, 2009 | 09:36 AM
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[QUOTE=03threefiftyz;7348051][QUOTE=icase81;7347908]
Originally Posted by Ziggyrama
Generally, power modes on Z's NA motor is an exercise in futility for most people. And when I say most, I mean people that will not do things that significantly change VE of the engine that would yield results worth writing home about. Let's do quick and conservative math:

catback exhaust: $1000
plenum spacer: $250
headers: $1000
tune: $1000

For over $3K, you may get extra 30hp, maybe. LOL. That's $100 per pony which is expensive in my book. And I am not even going to start with the fact that once you go faster, you need to stop faster (brakes) and be able to hold that power down at the pavement (suspension). More money. Why bother?


I have never, ever seen a rev-up dyno anywhere near 265 stock. More like 245 (as opposed to 235-240 for a stock non-rev). I think you are thinking of an HR. Good luck on 12.8's out of a rev-up.
Well, whatever he does. I recommend NOT changing the revup manifold to an older Non revup one such as the Mrev2, instead a Spacer(5/16 or 3/8) would be a good addition. HFCs and a great Y/X pipe like what Tony from motordyne offers would go a long way (more so than an exhaust on it's own)

Headers and intake are tricky, as I've seen questionable information on both. I KNOW JWT popchargers work, but I am unsure of how effective cold air style intakes are. As for headers, I've seen the Stillen headers on a revup, and they provided good high end gains, but cost low end power. I'm not a fan of the DC sport style headers, as the gains are low, and in the lower end of the powerband.
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Old May 20, 2009 | 09:41 AM
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Personally, if it is an 06 I would leave the intake alone. I still haven't found headers worth my money at this point. I am waiting for some independent dyno's of the new tomei's. Hopefully they can sway my negative opinion of almost all aftermarket headers.
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Old May 20, 2009 | 10:14 AM
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Why is there even a discussion about this. Juice or boost. Pick one.
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Old May 20, 2009 | 10:20 AM
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^ clown.
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Old May 20, 2009 | 10:34 AM
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Originally Posted by 350 Rookie
Why is there even a discussion about this. Juice or boost. Pick one.
because some ppl prefer the ease of a non-FI motor .. i owned a completely built Z32TT pushing over 500hp .. as much as i loved driving that car i enjoy the simplicity of my NA Z33 .. everybody has different prefernces

having gone the boosted route already i will have to say that in the future i will probably build a high compression NA motor when i have to replace this one
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