Is My Mod Math Correct?
Thread Starter
Instructor
Joined: Jul 2006
Posts: 134
Likes: 0
From: Charlotte NC
Is My Mod Math Correct?
Looking at doing mods and before I do, I want to compare some things based on relative value of cost versus HP. Are these generally correct -not assuming install cost? Also, what my I consider that is not on this list?
Modification HP Cost Cost/HP
Headers 25 $1,500 $60.00
Hurricane Intake 20 $370 $18.50
MAFS 12 $370 $30.83
Cam 45 $2,500 $55.56
Heads 30 $2,500 $83.33
Tune 20 $500 $25.00
Procharger 100 $6,000 $60.00
Modification HP Cost Cost/HP
Headers 25 $1,500 $60.00
Hurricane Intake 20 $370 $18.50
MAFS 12 $370 $30.83
Cam 45 $2,500 $55.56
Heads 30 $2,500 $83.33
Tune 20 $500 $25.00
Procharger 100 $6,000 $60.00
Drifting
Joined: Jul 2003
Posts: 1,796
Likes: 1
From: Annandale VA
Looking at doing mods and before I do, I want to compare some things based on relative value of cost versus HP. Are these generally correct -not assuming install cost? Also, what my I consider that is not on this list?
Modification HP Cost Cost/HP
Headers 25 $1,500 $60.00
Hurricane Intake 20 $370 $18.50
MAFS 12 $370 $30.83
Cam 45 $2,500 $55.56
Heads 30 $2,500 $83.33
Tune 20 $500 $25.00
Procharger 100 $6,000 $60.00
Modification HP Cost Cost/HP
Headers 25 $1,500 $60.00
Hurricane Intake 20 $370 $18.50
MAFS 12 $370 $30.83
Cam 45 $2,500 $55.56
Heads 30 $2,500 $83.33
Tune 20 $500 $25.00
Procharger 100 $6,000 $60.00
Not sure what MAFS is, but you should also include a ported intake, and a FAST intake. Again, install costs will vary.
I assume that a Hurricane intake is pretty good, but 20 HP may be optimistic. Vararam and Honker intakes are much more common. Also, does that Hurricane price include installation?
You're on the right track, but I'd suggest adding another column for installation costs.
Burning Brakes
Joined: Mar 2006
Posts: 946
Likes: 0
From: Midland, TX........ 550 RWHP/520 RWTQ (A6)
Your HP figures for headers and Procharger are low. From what I've seen (we're talking rear wheel figures): headers: 30-40hp Procharger: 150+hp You also have to take install prices into consideration. For example: the Procharger will cost quite a bit more than $6000 once you have it installed. Sounds like you're doing your homework though. Good Luck
Last edited by Bushong572; Mar 2, 2007 at 08:10 AM.
Safety Car
Joined: Dec 2004
Posts: 3,565
Likes: 5
From: stafford country, va. Avatar: Me on turn 3 @ Bristol (The World's Fastest Half-Mile)
Looking at doing mods and before I do, I want to compare some things based on relative value of cost versus HP. Are these generally correct -not assuming install cost? Also, what my I consider that is not on this list?
Modification HP Cost Cost/HP
Headers 25 $1,500 $60.00
Hurricane Intake 20 $370 $18.50
MAFS 12 $370 $30.83
Cam 45 $2,500 $55.56
Heads 30 $2,500 $83.33
Tune 20 $500 $25.00
Procharger 100 $6,000 $60.00
Modification HP Cost Cost/HP
Headers 25 $1,500 $60.00
Hurricane Intake 20 $370 $18.50
MAFS 12 $370 $30.83
Cam 45 $2,500 $55.56
Heads 30 $2,500 $83.33
Tune 20 $500 $25.00
Procharger 100 $6,000 $60.00
mods. need to be considered with perspective to the end result.
certain mods. will compliment others, etc. etc.
for example, certain cams will work better with certain heads, etc. etc.
otherwise, you're on the right track.
Le Mans Master
Joined: Aug 2002
Posts: 8,472
Likes: 38
From: Houston TX
St. Jude Donor '11
I updated a few based on my SWAG. Dropped the hurricane HP, a Vararam may net 20 but I dont think a Hurricane would. I am curious what a MAFS is. New MAF housings? MAF Translator? I think $2500 for a cam is way too much but I could be off myself there. Figure a cam is $400, where is the other $2100 coming from. I bumped it down to $1500 which I still think is high. I also bumped the Procharger to 150 HP. Also added a ported LS2 intake and underdrive pulley.
Whats interesteing to see is how the ported manifold and the underdrive pulley are just about as cost effective as the intake but they are overlooked a lot. Myself included. Also the cam (based on my $1500 price) is not far behind although it would require a tune as well.
Looking at doing mods and before I do, I want to compare some things based on relative value of cost versus HP. Are these generally correct -not assuming install cost? Also, what my I consider that is not on this list?
Modification HP Cost Cost/HP
Headers 25 $1,500 $60.00
Hurricane Intake 15 $370 $24.67
MAFS 12 $370 $30.83 (I donno what this is...
)
Cam 45 $1,500 $33.33
Heads 30 $2,500 $83.33
Tune 20 $500 $25.00
Procharger 150 $6,000 $40.00
Ported LS2 Intake 10 $250 $25
Underdrive Pulley 10 $280 $28
Modification HP Cost Cost/HP
Headers 25 $1,500 $60.00
Hurricane Intake 15 $370 $24.67
MAFS 12 $370 $30.83 (I donno what this is...
)Cam 45 $1,500 $33.33
Heads 30 $2,500 $83.33
Tune 20 $500 $25.00
Procharger 150 $6,000 $40.00
Ported LS2 Intake 10 $250 $25
Underdrive Pulley 10 $280 $28
Last edited by 5 Liter Eater; Mar 2, 2007 at 08:52 AM.
Thread Starter
Instructor
Joined: Jul 2006
Posts: 134
Likes: 0
From: Charlotte NC
Excellent perspective on this and will true-up some of my numbers as I got most of these from previous threads and was a guesstimate on my part.
Also, MAFS = Mass Air Flow Sensor - maybe I made up a new acronym.
Also, MAFS = Mass Air Flow Sensor - maybe I made up a new acronym.
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Thread Starter
Instructor
Joined: Jul 2006
Posts: 134
Likes: 0
From: Charlotte NC
Race Director
Joined: Mar 2005
Posts: 10,399
Likes: 25
From: Austin Texas
If cost per HP is important don't figure mufflers and over-axle pipes (mistakenly called cat backs). Up to $1500 and maybe 5RWHP.
Tech Contributor
Joined: Mar 2003
Posts: 12,094
Likes: 197
From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
Gains for mufflers dont total even 5rwhp. Cartek's repeated testing shows no gains at all. The hurricane intake at 20+ is false too. None show a gain on a dyno.
MAF's like the Lingenfelter 100mm can show a real substantial gain coupled with a proper tune to dial in the MAF tables but its in the 900 range with the associated tune.
I think the 'add up the mods' approach is silly and you should consult a tuner to get a proven package to get where you want to go. Start with what the application is. If this is a street car then anything you do beyond heads/cam at 450rwhp will yeild no speed gains under 100 mph. Getting H/C and a power adder like a S/C is a waste on the street. Get one or the other.
You mentioned no mods for traction. At 600+rwhp you will have a fine 12 second car on street tires which is eaxactly what you have now.
Add in 1300 for Z06 rear fenders, 800 for widened rear wheels to fit 345BFG drag radials for street use, and 650 for the tires every 6 months. I would suggest 4.10 gears and stop adding power when you cant get it to the ground in any application. This yeilds 10 second 1/4 times with a good H/C package.
MAF's like the Lingenfelter 100mm can show a real substantial gain coupled with a proper tune to dial in the MAF tables but its in the 900 range with the associated tune.
I think the 'add up the mods' approach is silly and you should consult a tuner to get a proven package to get where you want to go. Start with what the application is. If this is a street car then anything you do beyond heads/cam at 450rwhp will yeild no speed gains under 100 mph. Getting H/C and a power adder like a S/C is a waste on the street. Get one or the other.
You mentioned no mods for traction. At 600+rwhp you will have a fine 12 second car on street tires which is eaxactly what you have now.
Add in 1300 for Z06 rear fenders, 800 for widened rear wheels to fit 345BFG drag radials for street use, and 650 for the tires every 6 months. I would suggest 4.10 gears and stop adding power when you cant get it to the ground in any application. This yeilds 10 second 1/4 times with a good H/C package.
Le Mans Master
Joined: Aug 2002
Posts: 8,472
Likes: 38
From: Houston TX
St. Jude Donor '11
The key decision factor for a lot of these mods is NA or FI. And it depends on how far you plan on going. If you go with the cheap mods (CAI, ported LS2 manifold, underdrive pulley) and then decide to go FI you will need to scrap the underdrive and intake. Some of the mods are good either way, like the headers; that is unless you go with a turbo kit (other than STS). If you go with a H/C package that makes good power NA it will most likely not be ideal to strap a blower onto.
If you don't plan on going big and just want some cheap power adders this table is a good tool to know when to stop.
If you don't plan on going big and just want some cheap power adders this table is a good tool to know when to stop.
Pro
Joined: Jan 2007
Posts: 679
Likes: 0
From: St. Louis Missouri
You will not see gains in HP that total the sum of the parts. I would not pay a nickel for 2 hp but that same part added to another may gain 25 hp. The point is you need to consider the entire package working together. I wouldn't get caught up in the HP game which is mostly a marketing tool. The right combination of heads, cam, intake, exhaust , gears and tune can gain you big HP numbers but relate to pretty high dollar per HP cost. Nitrous and turbochargers are another story altogether.
Safety Car
Joined: Jan 2007
Posts: 4,332
Likes: 0
From: Kuwait
Your HP figures for headers and Procharger are low. From what I've seen (we're talking rear wheel figures): headers: 30-40hp Procharger: 150+hp You also have to take install prices into consideration. For example: the Procharger will cost quite a bit more than $6000 once you have it installed. Sounds like you're doing your homework though. Good Luck
