How Much
March-24th-2002, 07:07 PM
#2
Registered User
Join Date: Dec 2001
Location: Northern VA
Posts: 1,016
Re: How Much
Originally posted by protegéboy
HOW MUCH HP MAKE THOSE EACH ONE
HOW MUCH HP MAKE THOSE EACH ONE
CUSTOM INTAKE -- Depends on what you use
HEADER -- check corksport maybe $160-200. im guessing
THROTTLE BODY -- depends on who makes it
RACING CAMS -- check JCWHITNEY, CORKSPORT, NOPI
MSD IGNITION +COIL -- Check out JCWHITNEY or NOPI
PORTED INTAKE -- depends on what kind
BIGGER INJECTORS -- NOPI
RACING EXAUST -- $601 (MAZDASPEED) from Corksport. id prolly get it if i had the money
March-25th-2002, 01:37 AM
#3
Guest
Posts: n/a
He didn't ask how much it cost, or where to get it, rather how much horsepower is to be gained from each modification.
Jesse's response is about as close as you can get. Many of the modifications won't give you any HP alone, and might cost HP, but in the right combinations, they can yield impressive results.
For example, the K&N or a cone filter by itself is probably only worth a HP or two, and mostly due to replacing a dirty paper element.
A custom intake done incorrectly can actually lose HP, especially lower in the power band where it's used most.
Legal headers (there's only one, Pacesetter) is a toss-up. Without a better exhaust, I doubt you'd see any HP gain. And even then, the noise difference probably adds more HP (SOP) than actual gains.
A larger throttle body by itself will probably net a few HP, but at the expense of driveability. Same thing with a ported or honed intake.
Likewise, racing cams need to be paired with other mods to see any noticeable gains, and with the stock low comression pistons (8.8-9.0:1 in a hemi-head DOHC is not high compression) you won't see that much ultimate gain.
Racing injectors do you no good unless you can get a lot more air into and out of the engine. The stock injectors can support about 150-160 hp (at stock fuel pressure), and will idle without an aftermarket computer. Bigger injectors by themselves won't do anything other than create poor idle, hesitation, and probably a loss of fuel economy. And without a high flow fuel pump, will starve anyway.
The MSD might smooth things out, and keep the plugs from fowling with your bigger injectors, but the factory parts work just fine.
And the mistake most people make with exhausts is that they remove the resonator. While this might be good for reduced backpressure and upper RPM HP, it robs the engine of low and midrange torque.
So, none of those mods will really do much in the way of adding HP by themselves, and together (done properly) might gain you another 20-30hp (50-75 with a piston change), but you'd never pass emissions, and it wouldn't run well on the street.
Considering that you can add a turbo to the 1.8 BP fairly easily, and get 180-200hp, for about $1k, you'd be much better off going that way, unless of course, you particularly like a challenge.
Jesse's response is about as close as you can get. Many of the modifications won't give you any HP alone, and might cost HP, but in the right combinations, they can yield impressive results.
For example, the K&N or a cone filter by itself is probably only worth a HP or two, and mostly due to replacing a dirty paper element.
A custom intake done incorrectly can actually lose HP, especially lower in the power band where it's used most.
Legal headers (there's only one, Pacesetter) is a toss-up. Without a better exhaust, I doubt you'd see any HP gain. And even then, the noise difference probably adds more HP (SOP) than actual gains.
A larger throttle body by itself will probably net a few HP, but at the expense of driveability. Same thing with a ported or honed intake.
Likewise, racing cams need to be paired with other mods to see any noticeable gains, and with the stock low comression pistons (8.8-9.0:1 in a hemi-head DOHC is not high compression) you won't see that much ultimate gain.
Racing injectors do you no good unless you can get a lot more air into and out of the engine. The stock injectors can support about 150-160 hp (at stock fuel pressure), and will idle without an aftermarket computer. Bigger injectors by themselves won't do anything other than create poor idle, hesitation, and probably a loss of fuel economy. And without a high flow fuel pump, will starve anyway.
The MSD might smooth things out, and keep the plugs from fowling with your bigger injectors, but the factory parts work just fine.
And the mistake most people make with exhausts is that they remove the resonator. While this might be good for reduced backpressure and upper RPM HP, it robs the engine of low and midrange torque.
So, none of those mods will really do much in the way of adding HP by themselves, and together (done properly) might gain you another 20-30hp (50-75 with a piston change), but you'd never pass emissions, and it wouldn't run well on the street.
Considering that you can add a turbo to the 1.8 BP fairly easily, and get 180-200hp, for about $1k, you'd be much better off going that way, unless of course, you particularly like a challenge.