HP gains
HP gains
Can someone tell me about how much HP gain can one get with just bolt on mods like intakes, exhaust, pulleys? I had a 98 Accord coupe V6 and mod'ed the car with a bunch of bolt on's but thanks to the ECU not much gain came out of it 
there's dyno sheets etc around about mods.
u could have tried the stickies first though...
http://forums.maxima.org/4652687-post12.html
thats just some things there...
http://forums.maxima.org/4652687-post12.html
thats just some things there...
Y Pipe: Gained 17 whp minimum according to dyno charts.
Exhaust: Low.... like 2 whp or something can't remember
Intake: Nothing... at all... Waste of money
MEVI: a couple horses on top end... mid range loss owndid me...
JWT ECU: Still haven't dyno'd. But according to dyno charts it's only like 5-7 hp gain. However top end is very... very noticeable power band improvement...
That pretty much sums it up. Just look at my quarter mile times in my sig.... weee!
Oh yeah. Stock on leaky crap exhaust, dented y-pipe, and stock clutch I ran 14.8 @ 94-95 mph
Exhaust: Low.... like 2 whp or something can't remember
Intake: Nothing... at all... Waste of money
MEVI: a couple horses on top end... mid range loss owndid me...
JWT ECU: Still haven't dyno'd. But according to dyno charts it's only like 5-7 hp gain. However top end is very... very noticeable power band improvement...
That pretty much sums it up. Just look at my quarter mile times in my sig.... weee!
Oh yeah. Stock on leaky crap exhaust, dented y-pipe, and stock clutch I ran 14.8 @ 94-95 mph
I think the best I have seen with intake, y-pipe, cattback, and udp was around 188whp. I bet though with the 00VI and some intake spacers and a good tune maaaaybe 200whp or a little more. If you do a advanced search and type "bolt on dyno" and choose to search only the 4th gen forum it pulls up a couple good threads.
y-pipe is the best bang for the buck, 00vi would be next, or mevi. Other then that, the rest of the bolt ons dont do much.
intake..some throttle response, mostly sound, catback, again mostly for sound, the gains are minimal, udp, you wont notice anything past revving it in neutral and maybe a tiny bit in first gear.
JWT ECU was nice, pricey and hard to come by, with or without a form of a variable intake. Mostly, you do it for the extended rev limiter, so when you shift, your right back in the sweet spot.
intake..some throttle response, mostly sound, catback, again mostly for sound, the gains are minimal, udp, you wont notice anything past revving it in neutral and maybe a tiny bit in first gear.
JWT ECU was nice, pricey and hard to come by, with or without a form of a variable intake. Mostly, you do it for the extended rev limiter, so when you shift, your right back in the sweet spot.
v6 honda's dont compare with the maxima.
Ypipe alone has great gains, add headers with full exhaust, more gains, add intake....(Well... some say stock is better) but either way, maxima's gain pretty good power from boltons which a accord wouldn't.
Either way.... read the stickies, there are enough info there.
Ypipe alone has great gains, add headers with full exhaust, more gains, add intake....(Well... some say stock is better) but either way, maxima's gain pretty good power from boltons which a accord wouldn't.
Either way.... read the stickies, there are enough info there.
Thanks for the input guys. I know I could find most of the info by using search but I wanted to hear it from you guys. Over at the V6 accord forum they had a bunch of stickies about HP gains with bolt on, which I seem to never yielded.
I think the best I have seen with intake, y-pipe, cattback, and udp was around 188whp. I bet though with the 00VI and some intake spacers and a good tune maaaaybe 200whp or a little more. If you do a advanced search and type "bolt on dyno" and choose to search only the 4th gen forum it pulls up a couple good threads.
Many say they feel this and that, but once again the Y pipe is your only true power adder.
Unless the headers are an equal legnth design, they arent doing much.
A catback doesnt do much either for an NA Maxima. The UDP frees up some power but its minimal and I could never feel it.
Some members have done the port/polish and didnt see any impressive gains but I personally have never done it so I cant say much on it.
I am not one to get into an argument about the effectivness or ineffectiveness of the underdrive crank pulley. I have one and I like it. It was added after my intake (stillen) and before the I did the y-pipe.
This is from the unorthodox website:
Our Tuner Series crank pulleys provide HP & Torque gains across the entire RPM range. Power gains come from the reduction of weight. An average of 2.7 HP is gained from every pound lost off the crank shaft. 80-85% of our gains are from weight loss
I decided to try it. I like it. Some other members have tried this mod and don't really like it. To each his own.
This is from the unorthodox website:
Our Tuner Series crank pulleys provide HP & Torque gains across the entire RPM range. Power gains come from the reduction of weight. An average of 2.7 HP is gained from every pound lost off the crank shaft. 80-85% of our gains are from weight loss
I decided to try it. I like it. Some other members have tried this mod and don't really like it. To each his own.
Last edited by JSMax; Nov 6, 2008 at 07:52 AM.
I am not one to get into an argument about the effectivness or ineffectiveness of the underdrive crank pulley. I have one and I like it. It was added after my intake (stillen) and before the I did the y-pipe.
This is from the unorthodox website:
Our Tuner Series crank pulleys provide HP & Torque gains across the entire RPM range. Power gains come from the reduction of weight. An average of 2.7 HP is gained from every pound lost off the crank shaft. 80-85% of our gains are from weight loss
I decided to try it. I like it. Some other members have tried this mod and don't really like it. To each his own.
This is from the unorthodox website:
Our Tuner Series crank pulleys provide HP & Torque gains across the entire RPM range. Power gains come from the reduction of weight. An average of 2.7 HP is gained from every pound lost off the crank shaft. 80-85% of our gains are from weight loss
I decided to try it. I like it. Some other members have tried this mod and don't really like it. To each his own.
Now Im sure the UDP has to have some advantage with it being so light compared to stock but if its measureable Im not sure. I ran one for years and couldnt tell a difference. Paired up with the Lightened flywheel all I saw were that my rpms shot up quickly, but also fell very quickly.
I have to say that the only thing that the UDP and a lighten flywheel are good for is faster engine response. All you're doing is reducing rotational mass which in a sense is freeing up power already being produced by the car. You're not really making more power. Does that make sense? Either way it's not a kick you in the seat of your pants. I believe with the motor able to rev more freely just give the illusion it's more power.
S
S
I have to say that the only thing that the UDP and a lighten flywheel are good for is faster engine response. All you're doing is reducing rotational mass which in a sense is freeing up power already being produced by the car. You're not really making more power. Does that make sense? Either way it's not a kick you in the seat of your pants. I believe with the motor able to rev more freely just give the illusion it's more power.
S
S
Exactly.....
Senior Member
Joined: Jun 2007
Posts: 1,612
From: Lowell/Boston, MA
y-pipe is the best bang for the buck, 00vi would be next, or mevi. Other then that, the rest of the bolt ons dont do much.
intake..some throttle response, mostly sound, catback, again mostly for sound, the gains are minimal, udp, you wont notice anything past revving it in neutral and maybe a tiny bit in first gear.
JWT ECU was nice, pricey and hard to come by, with or without a form of a variable intake. Mostly, you do it for the extended rev limiter, so when you shift, your right back in the sweet spot.
intake..some throttle response, mostly sound, catback, again mostly for sound, the gains are minimal, udp, you wont notice anything past revving it in neutral and maybe a tiny bit in first gear.
JWT ECU was nice, pricey and hard to come by, with or without a form of a variable intake. Mostly, you do it for the extended rev limiter, so when you shift, your right back in the sweet spot.
I have to say that the only thing that the UDP and a lighten flywheel are good for is faster engine response. All you're doing is reducing rotational mass which in a sense is freeing up power already being produced by the car. You're not really making more power. Does that make sense? Either way it's not a kick you in the seat of your pants. I believe with the motor able to rev more freely just give the illusion it's more power.
S
S
and all together...AMEN.
I have to say that the only thing that the UDP and a lighten flywheel are good for is faster engine response. All you're doing is reducing rotational mass which in a sense is freeing up power already being produced by the car. You're not really making more power. Does that make sense? Either way it's not a kick you in the seat of your pants. I believe with the motor able to rev more freely just give the illusion it's more power.
S
S
The under drive pulley doesn't give you any more power, but it does free up some. I have seen dyno charts floating around the internet of people who have gained 5-8 wheel horsepower with a lightweight UDP.
Even if the engine isn't producing any more power but you free up power and allow it to rev up more freely....isn't that the point as well?
Yeah, i'm sure those parts do absolutely nothing to increase performance. I was half joking when I posted that anyway. My car ran a 9.25 in the eigth with nothing more than no muffler and a drilled out air box when I first bought her. I would hardly call that slow. I realize that you know alot about our cars, but i'm no noob, despite what my 100 posts might tell you. I have seen and felt an effect in performance gains with each of my mods, and have done thorough research before buying them. Boost isn't the end all be all. So don't hate. Not all of us have 10 grand to sink into our cars.
Yeah, i'm sure those parts do absolutely nothing to increase performance. I was half joking when I posted that anyway. My car ran a 9.25 in the eigth with nothing more than no muffler and a drilled out air box when I first bought her. I would hardly call that slow. I realize that you know alot about our cars, but i'm no noob, despite what my 100 posts might tell you. I have seen and felt an effect in performance gains with each of my mods, and have done thorough research before buying them. Boost isn't the end all be all. So don't hate. Not all of us have 10 grand to sink into our cars.
I have had all the normal bolt ons as well, and I can honestly say the only ones I could truly feel were the Y pipe, ECU upgrade and the MEVI.
Catback was completly unoticable as were intakes.Although throttle response seemed a bit sharper with the intake but that could haven just been in my head due to the increase in noise. One thing I personally have never owned is a hi-flow cat, but being that a straight pipe only yeilds 1-1.5hp I dont see how a hi-flow cat could be less restrictive and make more power then it. Which is what I do have., and I still dont "feel" any real gains from it.
And who said I was "hateing"? Im just giving the OP some info based on my experiences. I have had my max for quite a while and have been through the majority of mods already so I do have some knowledge on the parts Im informing about.
Yeah, boost isnt the end all be all, but it and nitrous are truly the BIG power adders with power that can be felt and proven.
The under drive pulley doesn't give you any more power, but it does free up some. I have seen dyno charts floating around the internet of people who have gained 5-8 wheel horsepower with a lightweight UDP.
Even if the engine isn't producing any more power but you free up power and allow it to rev up more freely....isn't that the point as well?
Even if the engine isn't producing any more power but you free up power and allow it to rev up more freely....isn't that the point as well?
Here is a good article on lightweight flywheels.
http://www.uucmotorwerks.com/flywhee...heel_works.htm
I dont know why everyone doesnt just do a little online research before they come into a forum and ask for people's opinions (or share theirs). I am surprised I didnt see any ricer math.
If you want horsepower, you ought to understand the basic concepts revolving around it.
Member
Joined: Aug 2008
Posts: 81
What does it matter how you get the power gain, as long as you got it? Its not like a Y pipe GIVES you horsepower either, your just removing that restriction.
Here is a good article on lightweight flywheels.
http://www.uucmotorwerks.com/flywhee...heel_works.htm
I dont know why everyone doesnt just do a little online research before they come into a forum and ask for people's opinions (or share theirs). I am surprised I didnt see any ricer math.
If you want horsepower, you ought to understand the basic concepts revolving around it.
Here is a good article on lightweight flywheels.
http://www.uucmotorwerks.com/flywhee...heel_works.htm
I dont know why everyone doesnt just do a little online research before they come into a forum and ask for people's opinions (or share theirs). I am surprised I didnt see any ricer math.
If you want horsepower, you ought to understand the basic concepts revolving around it.
Yes, that is EXACTLY what I was trying to say. It seems people are under the false illusion that because the UDP only "frees up power" it is worthless. As well as it only gives an "illusion" that the engine is putting more power down because it feels like it can spin up more freely. As I said above allowing it to spin up more freely by reducing the weight it has to rotate can give large 'power gains' at the wheels while accelerating through the lower gears.
Last edited by modenaf1; Nov 7, 2008 at 10:04 AM.
Hope you can drive with the juice. I know my 12.5 car isnt fast by any means. O yea i have one of those light flywheels. It goes wwwwwwwwwwwwwwwwwwwwwwwwwwweeeeeeeeeeeeeeeeeeeeeee eeeeeeeeeeeeeeeeeee
Yes, that is EXACTLY what I was trying to say. It seems people are under the false illusion that because the UDP only "frees up power" it is worthless. As well as it only gives an "illusion" that the engine is putting more power down because it feels like it can spin up more freely. As I said above allowing it to spin up more freely by reducing the weight it has to rotate can give large 'power gains' at the wheels while accelerating through the lower gears.
Newbie - Just Registered
Joined: Oct 2008
Posts: 8
From: queenz
my friend had a 93 lx acord and he had headers an intake and an ecu put in and he was making 190...the lx comes with 130 or so if i remembered correctly........intake isnt a waste of time, had one on my 88 pulsar nx and it did some justice, added 12 hp
And you dynoed to prove that?