How much can the stock 4.6L 2V handle???

apolloGT · 05-13-2008, 04:48 PM

Hey guys, forgive me for asking a childish question, but I'm new to this stuff. How much horsepower can the 4.6L 2V (found in my 2002 GT) handle with the stock engine block? I have plans to put a blower on there, so I'm hoping for around 450rwhp eventually. Can it handle that?

3.8for the win · 05-13-2008, 04:50 PM

about 400hp, once you go over that you have to watch it.

White04GT · 05-14-2008, 08:25 AM

Safely it can handle 400rwhp. Yes it can handle 450rwhp, but I would have some money stashed away for a built motor because it is a ticking time bomb with that much power on the stock bottom end. The key is all in the tune. You want to keep a 11-11.5 a/f ratio, and you don't want to have more than 16-17* of timing. 50 more horse power is not worth $6000 for me.

edit: I will be going to PSI Motorsports in 2 weeks to get a lentech street terminator auto transmission installed(rated up to 700hp), and a PI multidisk converter installed =D I should pick up around 30-40 hp with the new converter and be in the 400rwhp mark.

apolloGT · 05-14-2008, 03:01 PM

so what do I need to buy in order to insure my engine being able to handle 450rwhp?

White04GT · 05-14-2008, 08:34 PM

A built engine...

*JackThe Ripper* · 05-14-2008, 08:39 PM

Quote:

Originally Posted by White04GT

A built engine...

and then the question is, why stop at a paltry 450hp? time to reach for the upper 700's

bullitt 1600 · 05-15-2008, 12:00 AM

yup. 450 is it. Its hard to get there. U need a blower and almost evry bolt on

*Randy Stinchcomb* · 05-15-2008, 06:37 AM

Quote:

Originally Posted by apolloGT

so what do I need to buy in order to insure my engine being able to handle 450rwhp?

good rods and pistons, check wth the guys at Modular Performance as they sell some kits that are priced-right 248-348-1725 or www.modularperformance.com

SleepingGT · 05-15-2008, 05:58 PM

Quote:

Originally Posted by bullitt 1600

yup. 450 is it. Its hard to get there. U need a blower and almost evry bolt on

far from the truth, s-trim with smaller pulley and intercooler and you're there, no bolt ons

NA stage I/II cams, longtubes, intake, and 150 shot and you're close to there also

SleepingGT · 05-15-2008, 06:01 PM

Quote:

Originally Posted by apolloGT

Hey guys, forgive me for asking a childish question, but I'm new to this stuff. How much horsepower can the 4.6L 2V (found in my 2002 GT) handle with the stock engine block? I have plans to put a blower on there, so I'm hoping for around 450rwhp eventually. Can it handle that?

the stock engine block is good for well over 1000rwhp, it's the rotating assembly that blows, the stock rods/pistons are risky to use for over 400hp but i've seen several survive at 500+ and many blow up at alot less than that

with h beams and good forged pistons(not probe) you're easily good for the upper 700's or more but it's a good idea to get a forged crank instead of the iron one just because they're so cheap

mpt_1962 · 05-30-2008, 02:10 PM

what would you say the limit is of the iron crank?...assuming you have other forged internals.

*JackThe Ripper* · 05-30-2008, 03:13 PM

Quote:

Originally Posted by mpt_1962

what would you say the limit is of the iron crank?...assuming you have other forged internals.

if yer already in there might as well do the crank anyways

thats kind of like building a well engineered building on a poorly laid foundation. just doesent make sence.

stanger00 · 05-30-2008, 05:33 PM

Quote:

Originally Posted by SleepingGT

far from the truth, s-trim with smaller pulley and intercooler and you're there, no bolt ons

NA stage I/II cams, longtubes, intake, and 150 shot and you're close to there also

im running about 12 psi and 400 rwhp with 12* of timing through a automatic still on the stock block 25k miles and still ticking

SleepingGT · 05-31-2008, 12:51 AM

Quote:

Originally Posted by stanger00

im running about 12 psi and 400 rwhp with 12* of timing through a automatic still on the stock block 25k miles and still ticking

i'm running full bolt on's with longtubes and 150 shot through an NX plate on the stock bottom end

White04GT · 05-31-2008, 09:53 PM

I believe 600rwhp is the max on the stock iron crank.

spike_africa · 06-01-2008, 03:54 PM

Quote:

Originally Posted by SleepingGT

i'm running full bolt on's with longtubes and 150 shot through an NX plate on the stock bottom end

Thats what I like to hear, spray on brother spray on.

SleepingGT · 06-13-2008, 09:58 PM

Quote:

Originally Posted by spike_africa

Thats what I like to hear, spray on brother spray on.

scared to death i'm going to blow my passenger side floor pan out though

brucespot · 06-14-2008, 06:26 PM

Quote:

Originally Posted by White04GT

Safely it can handle 400rwhp. Yes it can handle 450rwhp, but I would have some money stashed away for a built motor because it is a ticking time bomb with that much power on the stock bottom end. The key is all in the tune. You want to keep a 11-11.5 a/f ratio, and you don't want to have more than 16-17* of timing. 50 more horse power is not worth $6000 for me.

edit: I will be going to PSI Motorsports in 2 weeks to get a lentech street terminator auto transmission installed(rated up to 700hp), and a PI multidisk converter installed =D I should pick up around 30-40 hp with the new converter and be in the 400rwhp mark.

I was Putting 413 to the wheels and I knocked a hole in my block big enough to put your fist through and 7200.00 Later I got it a strong motor so be where when these guy tell you 400 they arn't kidding you....

flyinfox · 06-14-2008, 09:01 PM

i had 400 one time then 5.6.7 and 700's and car runs beter than ever i havn't been on here in a while but i am a single turbo 88mm car running 20psi and i want more,,, but i have arias piston eagle h-beams and an eagle forged crank a built tko 600 and an explore rear end, the HP's get expensive

r3dn3ck · 06-15-2008, 06:14 PM

the above statements are all so similar for a reason... they're basically 100% right.

If you plan on a blower and you can't be happy with less than 450rwhp then you absolutely had better buy yourself a bottom end that's built for the power. I've seen enough stock mustangs rattle the bearings out of the rods (which is immediately followed by a fist size window in the block) with 360rwhp and less to have learned. If you want it to last and be fast then build it right and maintain the PISS out of it or just forget about it.

The stock crank isn't worth keeping if you're going over 450rwhp since by then you've either set the clock on your time bomb and will be replacing your engine entirely soon or you've built a motor correctly for running >400rwhp through.

It's not like it magically comes unglued after 450, they just beat the piss out of themselves and if you get a bad sip of gas or a hiccup in the tune or any number of things go the slightest bit wrong and you've got a crate full of broken shit under the hood. Some guys like Stanger00 are right at the ragged edge of what's sensible. He knows how to fix his own shit too. If you don't then you need to be more cautious and spend more money up front.

Save time, save money, build it for boost, then run boost. After you've got that power and it's reliable, come back and say thanks for warning you.

05-13-2008, 04:48 PM	#1 (permalink)
apolloGT Junior Member Join Date: Apr 2008 Location: Buffalo, NY Posts: 8	How much can the stock 4.6L 2V handle??? Hey guys, forgive me for asking a childish question, but I'm new to this stuff. How much horsepower can the 4.6L 2V (found in my 2002 GT) handle with the stock engine block? I have plans to put a blower on there, so I'm hoping for around 450rwhp eventually. Can it handle that?

05-14-2008, 08:25 AM	#3 (permalink)
White04GT Procharged Join Date: Sep 2005 Location: Kingwood, Tx. Posts: 1,022	Safely it can handle 400rwhp. Yes it can handle 450rwhp, but I would have some money stashed away for a built motor because it is a ticking time bomb with that much power on the stock bottom end. The key is all in the tune. You want to keep a 11-11.5 a/f ratio, and you don't want to have more than 16-17* of timing. 50 more horse power is not worth $6000 for me. edit: I will be going to PSI Motorsports in 2 weeks to get a lentech street terminator auto transmission installed(rated up to 700hp), and a PI multidisk converter installed =D I should pick up around 30-40 hp with the new converter and be in the 400rwhp mark. __________________ 2004 White GT just another Procharged GT. 401rwhp/407rwtq 8#'s in hot texas summer heat, built auto transmission. Last edited by White04GT : 05-14-2008 at 08:28 AM.

05-14-2008, 08:34 PM	#5 (permalink)
White04GT Procharged Join Date: Sep 2005 Location: Kingwood, Tx. Posts: 1,022	A built engine... __________________ 2004 White GT just another Procharged GT. 401rwhp/407rwtq 8#'s in hot texas summer heat, built auto transmission.

05-31-2008, 09:53 PM	#15 (permalink)
White04GT Procharged Join Date: Sep 2005 Location: Kingwood, Tx. Posts: 1,022	I believe 600rwhp is the max on the stock iron crank. __________________ 2004 White GT just another Procharged GT. 401rwhp/407rwtq 8#'s in hot texas summer heat, built auto transmission.

06-14-2008, 09:01 PM	#19 (permalink)
flyinfox go on3 Join Date: Nov 2005 Location: Missouri Posts: 384	i had 400 one time then 5.6.7 and 700's and car runs beter than ever i havn't been on here in a while but i am a single turbo 88mm car running 20psi and i want more,,, but i have arias piston eagle h-beams and an eagle forged crank a built tko 600 and an explore rear end, the HP's get expensive __________________ 02 sonic blue KB gt 610hp 598 tq mods 2.6 kb 18 lbs motor broke in new tune New numbers more boost 714Hp 732Tq 2.6 23lbs stage 3 crower cams 4.30's it blew up once but it is alive again http://www.mpsautosalvage.com/parting/index.cfm Last edited by flyinfox : 06-14-2008 at 09:03 PM.

05-14-2008, 03:01 PM	#4 (permalink)
apolloGT Junior Member Join Date: Apr 2008 Location: Buffalo, NY Posts: 8	so what do I need to buy in order to insure my engine being able to handle 450rwhp?

05-15-2008, 12:00 AM	#7 (permalink)
bullitt 1600 Junior Member Join Date: Jun 2007 Posts: 28	yup. 450 is it. Its hard to get there. U need a blower and almost evry bolt on

05-30-2008, 02:10 PM	#11 (permalink)
mpt_1962 Senior Member Join Date: Jun 2007 Location: Twentynine Palms, CA Posts: 816	what would you say the limit is of the iron crank?...assuming you have other forged internals.

06-15-2008, 06:14 PM	#20 (permalink)
r3dn3ck Wowbagger hates me too! Join Date: Nov 2005 Location: Magrathea/California Posts: 7,022	the above statements are all so similar for a reason... they're basically 100% right. If you plan on a blower and you can't be happy with less than 450rwhp then you absolutely had better buy yourself a bottom end that's built for the power. I've seen enough stock mustangs rattle the bearings out of the rods (which is immediately followed by a fist size window in the block) with 360rwhp and less to have learned. If you want it to last and be fast then build it right and maintain the PISS out of it or just forget about it. The stock crank isn't worth keeping if you're going over 450rwhp since by then you've either set the clock on your time bomb and will be replacing your engine entirely soon or you've built a motor correctly for running >400rwhp through. It's not like it magically comes unglued after 450, they just beat the piss out of themselves and if you get a bad sip of gas or a hiccup in the tune or any number of things go the slightest bit wrong and you've got a crate full of broken shit under the hood. Some guys like Stanger00 are right at the ragged edge of what's sensible. He knows how to fix his own shit too. If you don't then you need to be more cautious and spend more money up front. Save time, save money, build it for boost, then run boost. After you've got that power and it's reliable, come back and say thanks for warning you. __________________ Built 5.5L 2v and Maximum Motorsports Max Grip box. www.squarerootofone.com My CarDomain Page

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