quick question??

mustanggt_50 · 12-29-2002, 01:43 PM

I would like to know how much power a completely stock 5.0 short block can take from 87- 92. I've heard 400hp from some people and 500hp from others, but i would like to know what it actually is. Thanx alot

lx5091 · 12-29-2002, 01:57 PM

actually probably more like 2500HP for about .0001 seconds!!!

drudis · 12-30-2002, 02:29 PM

According to an aquaintance at Ford Engine Lab, about 450rwhp is the limit. Not that you cannot exceed that, but its a matter of WHEN, not IF. The more you push the sooner. 400rwhp will live a great long time, as long as you stay out of the 6K+ revs all the time.
IMOHO.

mustanggt_50 · 12-30-2002, 03:12 PM

thanx for the info drudis

is there anything that can be done to the block to help it out a little more, like ARP bolts or a stud girdle, how much will that do to the bottom end strength.

XR1stang · 12-30-2002, 03:27 PM

well if you are talking 500+ horse power I would strongly suggest going to something like the b50 (sportsman) block as it's a lot beefier. I have seen some b50's floating around that are pushing 800 hp or so at the tracks and these are run on a fairly regular basis.

If you are talking down around the 400 range then you are fairly safe with a stock block with a girdle. Is this going to be for street or strip duty?

fwiw the b50's can be had for around $800-900 new, so they don't kill your wallet like a R302 block would.

XR1stang

mustanggt_50 · 12-30-2002, 03:37 PM

the motor is for street/strip use, and i want 400-420rwhp(anything around there will make me happy). the vehicle is not gonna be used for racing alot, just occasional, i just dont want to throw to much hp into it and blow the motor, so i figure if i can strengthen up the bottom end a little then i should be ok. thanx again for any info, its much appreciated

Ron1 · 12-30-2002, 03:50 PM

Before switching to the R302 block I have now, I had a stock block that I used for 3 years at about the 600 + HP level. I used an old spec racers trick and had the block cryogenecally(sp) frozen. Even having one N2O mishap, and losing a piston, there was not a mark on the block and I reused it again. That plus a main girdle, and ARP hardware kept me racing for 3 years seeing the track almost every weekend. Cost is about $1.25 per pound. For more information on this process go here:http://www.onecryo.com/motorsp.htm and look at some of the pro's in the NHRA that are using it.

Ron

12-29-2002, 01:43 PM	#1
mustanggt_50 Registered Member Join Date: Dec 2002 Location: Ontario Canada Posts: 91	quick question?? I would like to know how much power a completely stock 5.0 short block can take from 87- 92. I've heard 400hp from some people and 500hp from others, but i would like to know what it actually is. Thanx alot __________________ 87 GT T-roof (needs paint) lol, rebuilt motor and trans, AOD - stage 2 shift kit, 3.73 gears - auburn posi, Dynomax Super Turbo Cat Back, FRPP 155lph fuel pump, K&N filter - air silencer removed, subframe connectors, strut tower brace. 88 GT T-roof 1989 LX Coupe 5.0 - 5spd Rice Haters Club member#105

12-29-2002, 01:57 PM	#2
lx5091 Registered Member Join Date: Nov 2001 Location: Fall River, MA Posts: 467	actually probably more like 2500HP for about .0001 seconds!!! __________________ '02 Explorer XLT 4.0L --Nice Vehicle '97 Saturn SL1--Soon to be ditched for a Ford!

12-30-2002, 02:29 PM	#3
drudis Moderator Join Date: Dec 1999 Location: Livonia, MI, USA Posts: 1,194	According to an aquaintance at Ford Engine Lab, about 450rwhp is the limit. Not that you cannot exceed that, but its a matter of WHEN, not IF. The more you push the sooner. 400rwhp will live a great long time, as long as you stay out of the 6K+ revs all the time. IMOHO. __________________ Darius Rudis, Moderator Corner Carvers Delight 1989 Mustang LX - Open Track Car http://www.dariusrudis.com

12-30-2002, 03:12 PM	#4
mustanggt_50 Registered Member Join Date: Dec 2002 Location: Ontario Canada Posts: 91	thanx for the info drudis is there anything that can be done to the block to help it out a little more, like ARP bolts or a stud girdle, how much will that do to the bottom end strength. __________________ 87 GT T-roof (needs paint) lol, rebuilt motor and trans, AOD - stage 2 shift kit, 3.73 gears - auburn posi, Dynomax Super Turbo Cat Back, FRPP 155lph fuel pump, K&N filter - air silencer removed, subframe connectors, strut tower brace. 88 GT T-roof 1989 LX Coupe 5.0 - 5spd Rice Haters Club member#105

12-30-2002, 03:27 PM	#5
XR1stang Registered Member Join Date: Apr 1999 Location: San Francisco, CA Posts: 205	well if you are talking 500+ horse power I would strongly suggest going to something like the b50 (sportsman) block as it's a lot beefier. I have seen some b50's floating around that are pushing 800 hp or so at the tracks and these are run on a fairly regular basis. If you are talking down around the 400 range then you are fairly safe with a stock block with a girdle. Is this going to be for street or strip duty? fwiw the b50's can be had for around $800-900 new, so they don't kill your wallet like a R302 block would. XR1stang __________________ I used to hate computers, until the server went down on me...

12-30-2002, 03:37 PM	#6
mustanggt_50 Registered Member Join Date: Dec 2002 Location: Ontario Canada Posts: 91	the motor is for street/strip use, and i want 400-420rwhp(anything around there will make me happy). the vehicle is not gonna be used for racing alot, just occasional, i just dont want to throw to much hp into it and blow the motor, so i figure if i can strengthen up the bottom end a little then i should be ok. thanx again for any info, its much appreciated __________________ 87 GT T-roof (needs paint) lol, rebuilt motor and trans, AOD - stage 2 shift kit, 3.73 gears - auburn posi, Dynomax Super Turbo Cat Back, FRPP 155lph fuel pump, K&N filter - air silencer removed, subframe connectors, strut tower brace. 88 GT T-roof 1989 LX Coupe 5.0 - 5spd Rice Haters Club member#105

12-30-2002, 03:50 PM	#7
Ron1 Registered Member Join Date: Sep 1999 Location: Vancouver, WA USA Posts: 439	Before switching to the R302 block I have now, I had a stock block that I used for 3 years at about the 600 + HP level. I used an old spec racers trick and had the block cryogenecally(sp) frozen. Even having one N2O mishap, and losing a piston, there was not a mark on the block and I reused it again. That plus a main girdle, and ARP hardware kept me racing for 3 years seeing the track almost every weekend. Cost is about $1.25 per pound. For more information on this process go here:http://www.onecryo.com/motorsp.htm and look at some of the pro's in the NHRA that are using it. Ron __________________ 65 Mustang Fastback 347 Stroker, C4 with 4.56 10.68 @ 122 N/A 9.74 @ 137 w/ N2O www.fastspecialties.com

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