how much horse power gains for these mods

[DeathWish]

I am thinking about adding some mods, and would like to know the ranges for HP gains...

1) Mac Cold Air Intake
2) 10mm throttle body upgrade
3) SLP Loudmouth Exhaust
4) SLP X-PIPE with high-flow cat

thanks.

 

[00VERT GT]

5

 

[00VERT GT]

jk i would say a good 15 at least. it seems to differ for everyone but i think 15 is middle ground. jmo

 

[nickthegenius]

I'll raise you 5 and bet 10hp.

CAI = about 1-2
Midpipe and catback = 10 if you're lucky
TB= not much unless you have cams or something that requires better breathing

 

[Zinc03GT]

what year and model?

 

[XTONKAX]

2003 GT.

 

[00VERT GT]

whoops i thought i saw a plenum in there somewhere. k so around 10 sounds good.

i don't think that tb's makes much hp by themsleves. you need to get the plenum as well man.

 

[Zinc03GT]

I would say 15 is a good guess

 

[DeathWish]

that it???

wow, that's it huh? funny how they say 13 for xpipe, 10 for catback, 7-10 for air intake....

what does a plenum do for me?

 

[Zinc03GT]

I would say skip the cai and get a maf, go throttle body & plenum...you could see close to 20

 

[nickthegenius]

wow, that's it huh? funny how they say 13 for xpipe, 10 for catback, 7-10 for air intake....

what does a plenum do for me?

That is sometime referred to as "Hot-Rod-magazine-math" or lately "Ricer Math". It doesn't add up that way.

 

[jas142]

dont forget, mods dont always ADD to eachother. mods that give 10 + 5 + 5 seperately don't always equal 20 together. Sometimes more, sometimes less.

I'd say about 10 hp with those mods.

 

[00VERT GT]

what is that like $800 bucks for 10hp?

good ground work for a supercharger i guess.

 

[Blakers01GT]

I'm gonna say 9rwhp.

and that's gonna be all x-pipe, TB will probably only hurt you, catback won't do anything, CAI hurts more then helps because it screws up your air fuel if you don't monitor it or tune it after the install. good luck, i hope you get lucky somehow.

 

[MDGT]

Mac Cold Air Intake: -2rwhp
10mm throttle body upgrade: -2rwhp
SLP Loudmouth Exhaust: +2rwhp
SLP X-PIPE with high-flow cat: +8rwhp


TOTAL: +6rwhp

 

[DeathWish]

you guys are scaring me... i will lose power with the COLD AIR INTAKE... is it that brand or just the whole concept of the CAI? Yes $800 for 10hp is probably dumb, although the SLP stuff will sound good, and probably necessary for future upgrades?

 

[BVille99GT]

Just get a MAF, I prefer Pro-M, a cone style K&N filter. And on the mid-pipe go cat-less, O/R.

 

[jaxter]

I'm like you, I guess....have some bux to toss around and a factory-whimped car to mod. I'm looking for a place that does rear-ends, want 4.10's and will also pop for a Granatelli or Diablo to 'reset' the speedo for the gears and perhaps advance the timing to run 90+ octane as a plus...exhaust will be next, I dropped a K&N in, farted around w/intake (yep, even had that PVC 'giant homemade CAI' setup, not worth bothering, stock is fine, keeps the dirt off the filter w/the 'snorkel' and doubt any more flow really helps anyway....funny, Ford has already designed a CAI by drawing from the wheelwell...). If you have stock gears, a s/c would be stupid, as wouls nitrous. A lower gearing wouldn't stress the engine as much as 'overpowering the gears'.....right? C'mon....anything lower than 3.55 is dumb, especially since we have so much torque.

 

[jaxter]

Boy, I confuse myself sometimes. Higher ratio(4.10's)=better. Lower ratio/stock w/mods=more stressed motor/drivetrain, less gains per buck overall anyway. Look at 3.25 times bonestock over 4.10's......do the mth, you can't pick up them 10th's any cheaper and your engine will thank you by being less dragged and running in it's powerband more often. Sorry.

 

[xtrm281gt]

Mac Cold Air Intake: -2rwhp
10mm throttle body upgrade: -2rwhp
SLP Loudmouth Exhaust: +2rwhp
SLP X-PIPE with high-flow cat: +8rwhp


TOTAL: +6rwhp

explain to me how you are somehow determining that better breathing will take your hp down. I don't disagree that the gain is practically zero but to say it is making a car slower than the factory setup is not true. I am also going under the assumption you meant hp and not rwhp. These mods wouldn't necessairly amount to crap at the rear wheels, it would be more in the 1-3rwhp range i'm willing to bet

btw to the author here i would put my money in the 6-10hp range for your mods tops