Best power boosters

carlos.elliott · 05-16-2004, 04:10 PM

I have a 04 gt 5 speed and want more power. What add ons should I do and what order. I want to do it in the order that makes the best gains.

LX5liter · 05-22-2004, 09:19 AM

The easiest way to get a good seat of the pants increase is to add a supercharger. Keep the boost fairly low (5-6#) on the stock engine. As you add better parts (bigger MAF, throttlebody, injectors, etc...), you can up the boost a bit, but don't go much past 9-10#s of boost on the stock bottom end.
You can also go the nitrous route, its cheaper on the original cash outlay, but you have to re-fill the bottle(s) once in a while.
Then there are turbos. They work great, but take up alot of room. I think next time I build another car it will be a turbo.
Whatever you decide, get a kit designed for your car, it will make installation alot easier.

carlos.elliott · 05-22-2004, 02:36 PM

What is the limit on a stock 4.6 bottem end as far as horepower before I have to open it up. I was thinking about a keene bell and the rest just bolt on stuff.

stangGT95 · 05-22-2004, 03:43 PM

I can't say for sure but I've heard 9-10# like LX5liter said. MM&FF dynoed an '02 4.6 w/ cat-back exhaust (baseline was 247hp/292tq) and 6,9,11, & 15# from a KB (latter 3 were intercooled and had a chip) as well as 36# injectors, boost-a-pump from the KB kit. There was a peak hp/tq of 351/366, 399/427, 430/466 (w/90mm MAF, 75mm TB, boost pipe +6hp at 6, +19 at 9, +26 at 11). Those mods plus race gas at 15# was 504/521. I wouldn't risk going above 9# but they showed what it's capable of. I'm liking the 4.6 more and more.

chrismustang · 06-05-2004, 06:52 PM

hey stanggt95 do you need to increase the rear end axel with out that power? what hp will it hold?

stangGT95 · 06-07-2004, 11:52 AM

I haven't heard how much they withstand or when's a good time to go to a 9" rear end. The only upgrades that I've heard on the 8.8 was lower gears and 31-spline axles. I'd say w/ that kind of horse, 31's probably wouldn't hurt to have.

LX5liter · 06-23-2004, 08:40 PM

In my opinion, anything with 250+ horsepower should get larger axles. The 28 spline stockers may last for a while, but they will break.

05-16-2004, 04:10 PM	#1
carlos.elliott Registered Member Join Date: May 2004 Location: Ohio Posts: 68	Best power boosters I have a 04 gt 5 speed and want more power. What add ons should I do and what order. I want to do it in the order that makes the best gains.

05-22-2004, 09:19 AM	#2
LX5liter dude5l Join Date: May 2001 Location: Grande Prairie, Alberta, Canada Posts: 603	The easiest way to get a good seat of the pants increase is to add a supercharger. Keep the boost fairly low (5-6#) on the stock engine. As you add better parts (bigger MAF, throttlebody, injectors, etc...), you can up the boost a bit, but don't go much past 9-10#s of boost on the stock bottom end. You can also go the nitrous route, its cheaper on the original cash outlay, but you have to re-fill the bottle(s) once in a while. Then there are turbos. They work great, but take up alot of room. I think next time I build another car it will be a turbo. Whatever you decide, get a kit designed for your car, it will make installation alot easier. __________________ Good luck! Brad R. 1992 L.X. 5.0 coupe MODS: A few little bolt ons New Best time ...11.60 @ 128 mph @ 2000+ ft altitude. Rice Haters Club member #39 Users rides #2542

05-22-2004, 03:43 PM	#4
stangGT95 Registered Member Join Date: Jun 2003 Location: Novinger, Mo Posts: 72	I can't say for sure but I've heard 9-10# like LX5liter said. MM&FF dynoed an '02 4.6 w/ cat-back exhaust (baseline was 247hp/292tq) and 6,9,11, & 15# from a KB (latter 3 were intercooled and had a chip) as well as 36# injectors, boost-a-pump from the KB kit. There was a peak hp/tq of 351/366, 399/427, 430/466 (w/90mm MAF, 75mm TB, boost pipe +6hp at 6, +19 at 9, +26 at 11). Those mods plus race gas at 15# was 504/521. I wouldn't risk going above 9# but they showed what it's capable of. I'm liking the 4.6 more and more. __________________ 95 GT w/ AODE and Transgo Shift kit, trans cooler, SpeedCal, KB 1.5 Flowzilla w/ 6# pulley, MAC chrome CAI, chrome radiator hoses, stock MAF w/ center post removed, 70mm PP TB, electrical boost & FP gauges, digital A/F gauge, 1 5/8" unequal headers, 2 1/2" ProChamber h-pipe, Borla catback exhaust, and 3.55's. Cobra RR hood, Saleen double wing, Xenon body kit, chrome Cobra R wheels 17X8 in front and 17X10.5 in the back.

06-07-2004, 11:52 AM	#6
stangGT95 Registered Member Join Date: Jun 2003 Location: Novinger, Mo Posts: 72	I haven't heard how much they withstand or when's a good time to go to a 9" rear end. The only upgrades that I've heard on the 8.8 was lower gears and 31-spline axles. I'd say w/ that kind of horse, 31's probably wouldn't hurt to have. __________________ 95 GT w/ AODE and Transgo Shift kit, trans cooler, SpeedCal, KB 1.5 Flowzilla w/ 6# pulley, MAC chrome CAI, chrome radiator hoses, stock MAF w/ center post removed, 70mm PP TB, electrical boost & FP gauges, digital A/F gauge, 1 5/8" unequal headers, 2 1/2" ProChamber h-pipe, Borla catback exhaust, and 3.55's. Cobra RR hood, Saleen double wing, Xenon body kit, chrome Cobra R wheels 17X8 in front and 17X10.5 in the back.

06-23-2004, 08:40 PM	#7
LX5liter dude5l Join Date: May 2001 Location: Grande Prairie, Alberta, Canada Posts: 603	In my opinion, anything with 250+ horsepower should get larger axles. The 28 spline stockers may last for a while, but they will break. __________________ Good luck! Brad R. 1992 L.X. 5.0 coupe MODS: A few little bolt ons New Best time ...11.60 @ 128 mph @ 2000+ ft altitude. Rice Haters Club member #39 Users rides #2542

05-22-2004, 02:36 PM	#3
carlos.elliott Registered Member Join Date: May 2004 Location: Ohio Posts: 68	What is the limit on a stock 4.6 bottem end as far as horepower before I have to open it up. I was thinking about a keene bell and the rest just bolt on stuff.

06-05-2004, 06:52 PM	#5
chrismustang Registered Member Join Date: Jun 2004 Posts: 9	hey stanggt95 do you need to increase the rear end axel with out that power? what hp will it hold?

Thread Tools
Show Printable Version Email this Page
Display Modes	Rate This Thread
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode	Rate This Thread:

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Power steering	RDRZ	Classic Mustangs	0	03-02-2004 07:53 PM
power for 500 hp daily	Torinalth	Power Adders	22	09-25-2003 11:54 PM
Power for the Power Amp	traderguy	Audio, Security, & Electronics	2	07-13-2003 08:07 PM
Power WIndow ?'s	Coupe Devil	Windsor Power	5	10-23-2001 03:12 PM
Electrical power, where to splice?	Chris_H	Windsor Power	3	02-11-2001 08:29 PM