Cost analysis - bolt-ons - HP gain per $ spent
Thread Starter
TECH Veteran
Joined: Aug 2002
Posts: 4,055
Likes: 1
From: Hartsdale, NY
Cost analysis - bolt-ons - HP gain per $ spent I'm a CPA by trade so I look at most things in terms of numbers.
I assembled the analysis below illustrating the horse power gained per dollor spent on most of the popular bolt-on modifications that I have either performed myself (1999 SS) or read about here.
Surprisingly, headers, heads and cat-back exhaust systems are the most expensive in terms of power obtained.
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Intake Manifold (cost = $500) (HP per $ = $50.00)
Mass Air Flow (cost = 180) (HP per $ = $22.50)
Air lid (Cost = 130) (HP per $ = $13.00)
Cold Air induction(Cost = $150)(HP per $ = $18.75)
Ported TB (Cost = $180) (HP per $ = $22.50)
Thermostat (Cost = $50) (HP per $ = $16.67)
Header LT w/cats(Cost = $1,200)(HP per $ = $60.00)
Cat-back exhaust (Cost = $500) (HP per $ = $50)
Cam (Cost = $600) (HP per $ = $20)
Heads (Cost = $2,500) (HP per $ = $83.33)
I assembled the analysis below illustrating the horse power gained per dollor spent on most of the popular bolt-on modifications that I have either performed myself (1999 SS) or read about here.
Surprisingly, headers, heads and cat-back exhaust systems are the most expensive in terms of power obtained.
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Intake Manifold (cost = $500) (HP per $ = $50.00)
Mass Air Flow (cost = 180) (HP per $ = $22.50)
Air lid (Cost = 130) (HP per $ = $13.00)
Cold Air induction(Cost = $150)(HP per $ = $18.75)
Ported TB (Cost = $180) (HP per $ = $22.50)
Thermostat (Cost = $50) (HP per $ = $16.67)
Header LT w/cats(Cost = $1,200)(HP per $ = $60.00)
Cat-back exhaust (Cost = $500) (HP per $ = $50)
Cam (Cost = $600) (HP per $ = $20)
Heads (Cost = $2,500) (HP per $ = $83.33)
TECH Enthusiast
Joined: Nov 2001
Posts: 688
Likes: 2
From: Derby, KS
Re: Cost analysis - bolt-ons - HP gain per $ spent yeah but after the easiest stuff what else is left?????
some of those numbers are pretty generous, in my case at least MAF=0hp, catback = almost zero.
some of those numbers are pretty generous, in my case at least MAF=0hp, catback = almost zero.
