Naturally Aspirated Hp for '99 cobra
01-30-2010, 09:59 AM
#2
6th Gear Member
Join Date: Mar 2007
Location: Yadkin, Nc
Posts: 5,183
Well the 5 major components to making Hp n/a are RPMS, Heads, Cams, Intakes, and displacement.
RPM's- you have thoseon your side. you can safely rev your stock shortblock to 7500. although you may want to invest in an ATI dampner.
Heads- you also have The Best heads ( beside FR500's) for our cars. get them ported, not fully ported just cleaned up really good.
Cams- Get custom, CMS makes custom cams, tell him what you plan to do and he will fix you up. you want alot of duration on these.
Intake-Not cold Air intakes, but intake manifolds. NA SVT on svtperformance makes PortedShort runner intakes for 4v's. Also tell him our plans and if you want send him your plans for the car and he will make you a nice one. What a shortrunner does is move the power band up t about 7000 and gives you about 20-30hp.
Displacement- is something these motors dont have alot of,you can bore and stroke these bad boys out up to 324ci's.
The Champforn/a hp out of a 4.6 based motor is nazman, he made 534rwhp. stock displacement he made 410rwhp.
4.10 or 4.30 gears will help alot too, not hp just acceleration
http://www.svtperformance.com/forums...orsepower.html
RPM's- you have thoseon your side. you can safely rev your stock shortblock to 7500. although you may want to invest in an ATI dampner.
Heads- you also have The Best heads ( beside FR500's) for our cars. get them ported, not fully ported just cleaned up really good.
Cams- Get custom, CMS makes custom cams, tell him what you plan to do and he will fix you up. you want alot of duration on these.
Intake-Not cold Air intakes, but intake manifolds. NA SVT on svtperformance makes PortedShort runner intakes for 4v's. Also tell him our plans and if you want send him your plans for the car and he will make you a nice one. What a shortrunner does is move the power band up t about 7000 and gives you about 20-30hp.
Displacement- is something these motors dont have alot of,you can bore and stroke these bad boys out up to 324ci's.
The Champforn/a hp out of a 4.6 based motor is nazman, he made 534rwhp. stock displacement he made 410rwhp.
4.10 or 4.30 gears will help alot too, not hp just acceleration
http://www.svtperformance.com/forums...orsepower.html
Last edited by boduke0220; 01-30-2010 at 10:07 AM.
01-30-2010, 10:38 AM
#4
Banned
Join Date: May 2007
Location:
Posts: 4,064
Well the 5 major components to making Hp n/a are RPMS, Heads, Cams, Intakes, and displacement.
RPM's- you have thoseon your side. you can safely rev your stock shortblock to 7500. although you may want to invest in an ATI dampner.
Heads- you also have The Best heads ( beside FR500's) for our cars. get them ported, not fully ported just cleaned up really good.
Cams- Get custom, CMS makes custom cams, tell him what you plan to do and he will fix you up. you want alot of duration on these.
Intake-Not cold Air intakes, but intake manifolds. NA SVT on svtperformance makes PortedShort runner intakes for 4v's. Also tell him our plans and if you want send him your plans for the car and he will make you a nice one. What a shortrunner does is move the power band up t about 7000 and gives you about 20-30hp.
Displacement- is something these motors dont have alot of,you can bore and stroke these bad boys out up to 324ci's.
The Champforn/a hp out of a 4.6 based motor is nazman, he made 534rwhp. stock displacement he made 410rwhp.
4.10 or 4.30 gears will help alot too, not hp just acceleration
http://www.svtperformance.com/forums...orsepower.html
RPM's- you have thoseon your side. you can safely rev your stock shortblock to 7500. although you may want to invest in an ATI dampner.
Heads- you also have The Best heads ( beside FR500's) for our cars. get them ported, not fully ported just cleaned up really good.
Cams- Get custom, CMS makes custom cams, tell him what you plan to do and he will fix you up. you want alot of duration on these.
Intake-Not cold Air intakes, but intake manifolds. NA SVT on svtperformance makes PortedShort runner intakes for 4v's. Also tell him our plans and if you want send him your plans for the car and he will make you a nice one. What a shortrunner does is move the power band up t about 7000 and gives you about 20-30hp.
Displacement- is something these motors dont have alot of,you can bore and stroke these bad boys out up to 324ci's.
The Champforn/a hp out of a 4.6 based motor is nazman, he made 534rwhp. stock displacement he made 410rwhp.
4.10 or 4.30 gears will help alot too, not hp just acceleration
http://www.svtperformance.com/forums...orsepower.html
01-30-2010, 11:35 AM
#5
Thread Starter
Join Date: Jan 2010
Location: Georgia
Posts: 2
Bolt-on 4.6 4V performace
Now that I see what it will take to increase the base naturally aspirated performance I think that power adders are a better option. What can be done to increase performace from "bolt-on" perspective? Assuming that I am going to keep the engine long block as is.
01-30-2010, 12:07 PM
#6
SVT Section Moderator
Join Date: Jul 2008
Location: Burnt Hills, NY
Posts: 15,601
...As stated ^^^ Long Tube headers, High Flo (or O/R) X pipe & CB (exhaust), Gears (I'd go 3.90 or 4,10's with a Power adder)...as far as a Power Adder, all up to the Budget!
...Me, I'd go with a Vortech Centrifugal Superchager, injectors, BAP & Tune!
...Me, I'd go with a Vortech Centrifugal Superchager, injectors, BAP & Tune!
01-30-2010, 12:39 PM
#7
6th Gear Member
Join Date: Mar 2007
Location: Chicago, IL
Posts: 6,169
02-07-2010, 09:15 PM
#9
2nd Gear Member
Join Date: Dec 2007
Location: Korea... til 2011, thanks Uncle Sam...
Posts: 434
On the 99-01 Cobras best mod by far is a solid axle swap and gears. 4.10's are great, thats what I am running til next week when I step to 4.30's. I'm getting my entire rear redone for $1100 and a few hours of my time. Great investment for the performance gain.
Other mods I'd highly recommend are full exhaust (bassini headers are a god send), u/d pulleys(sfi approved only), dyno tune and weight reduction.
Other mods I'd highly recommend are full exhaust (bassini headers are a god send), u/d pulleys(sfi approved only), dyno tune and weight reduction.
