Limits to hyperutectics

tyler97 · January 11th, 2012, 08:15 PM

Just found out I have speed proh273cp and wondering what I can't do as in how high I can rev, max nitrous things of that nature just looking into limiting factors

FastStang91Lx · January 11th, 2012, 08:25 PM

Rev as high as you want, but be easy on the nitrous or boost in case you detonate. Hypereutectics just can't handle detonation as well. If no detonation, they are virtually the same.

tyler97 · January 11th, 2012, 08:33 PM

Will it hold a 150. Shot I will prrob run that 4 Friday night special

gripthenboost · January 11th, 2012, 08:40 PM

Car revs pretty fast right? Thought pistons are light.

tyler97 · January 11th, 2012, 09:17 PM

Yea pretty fast

ryanw · January 11th, 2012, 09:48 PM

Are you talking about pistons ?

gripthenboost · January 11th, 2012, 10:12 PM

Thought pistons allow the motor to rev high, But you loose strength. There less forgiving so dont beat them up too bad.

Or else this will be you

ryanw · January 11th, 2012, 11:21 PM

Originally Posted by tyler97

Just found out I have speed proh273cp and wondering what I can't do as in how high I can rev, max nitrous things of that nature just looking into limiting factors

Was you motor rebuilt at some point cuz 1991 mustangs came with forged pistons

tyler97 · January 12th, 2012, 06:24 AM

Yes who ever had it before took it .030 over

69fastback · January 12th, 2012, 11:36 AM

Originally Posted by tyler97

Will it hold a 150. Shot I will prrob run that 4 Friday night special

Questions like this don't have a right answer. Essentially, yes, it will hold a 150 shot. If you get the tune up wrong, and it rattles the pistons, then no, it won't hold it

StangBanger302 · January 12th, 2012, 12:54 PM

I wouldn't suggest throwing nitrous on it unless you've been doing nitrous tune-ups for a while. If not, get a dyno tune by a reputable tuner.

Racerbox77 · January 16th, 2012, 03:00 PM

Originally Posted by FastStang91Lx

Rev as high as you want, but be easy on the nitrous or boost in case you detonate. Hypereutectics just can't handle detonation as well. If no detonation, they are virtually the same.

Correct, nothing to worry about unless your tune is off.

Originally Posted by tyler97

Will it hold a 150. Shot I will prob run that 4 Friday night special

Yes it will but refer to above post.

Originally Posted by 69fastback

Questions like this don't have a right answer. Essentially, yes, it will hold a 150 shot. If you get the tune up wrong, and it rattles the pistons, then no, it won't hold it

Goes for any piston.

Originally Posted by StangBanger302

I wouldn't suggest throwing nitrous on it unless you've been doing nitrous tune-ups for a while. If not, get a dyno tune by a reputable tuner.

Not necessary, just be sure its got enough fuel (wide band 11.5-11.9:1) and back the timing off by about 10 degrees (assuming you have 9-10:1 compression). Also run good gas. I've had great luck with Torco.

69fastback · January 16th, 2012, 08:09 PM

Originally Posted by Racerbox77

Goes for any piston.

Well dur de dur dur

January 11th, 2012, 08:15 PM	#1
tyler97 Regular 1991 gt cobra clone Join Date: Apr 2011 Location: FL Posts: 374 iTrader: 0 reviews	Limits to hyperutectics Just found out I have speed proh273cp and wondering what I can't do as in how high I can rev, max nitrous things of that nature just looking into limiting factors __________________ 1991 GT- Ripped torque boxes/no SFCs/306/24lb injectors/Twisted Wedge 170s/Full exhaust/Full bolt ons/X3Z computer Buid thread http://www.moddedmustangs.com/forums...ld-thread.html

January 11th, 2012, 08:25 PM	#2
FastStang91Lx I Post Entirely Way Too Much 1991 Mustang LX 5.0 Join Date: Jan 2010 Location: Minnesota Posts: 5,572 iTrader: 2 reviews	Rev as high as you want, but be easy on the nitrous or boost in case you detonate. Hypereutectics just can't handle detonation as well. If no detonation, they are virtually the same. __________________ Point made in less than a few hours with minimal response. http://www.moddedmustangs.com/forums...ml#post4465184

January 11th, 2012, 08:33 PM	#3
tyler97 Regular 1991 gt cobra clone Join Date: Apr 2011 Location: FL Posts: 374 iTrader: 0 reviews	Will it hold a 150. Shot I will prrob run that 4 Friday night special __________________ 1991 GT- Ripped torque boxes/no SFCs/306/24lb injectors/Twisted Wedge 170s/Full exhaust/Full bolt ons/X3Z computer Buid thread http://www.moddedmustangs.com/forums...ld-thread.html

January 11th, 2012, 08:40 PM	#4
gripthenboost Hardcore Enthusiast 91 Mustang GT 1991 sliver GT Join Date: Apr 2010 Location: New York Posts: 1,213 iTrader: 0 reviews	Car revs pretty fast right? Thought pistons are light. __________________

January 11th, 2012, 09:17 PM	#5
tyler97 Regular 1991 gt cobra clone Join Date: Apr 2011 Location: FL Posts: 374 iTrader: 0 reviews	Yea pretty fast __________________ 1991 GT- Ripped torque boxes/no SFCs/306/24lb injectors/Twisted Wedge 170s/Full exhaust/Full bolt ons/X3Z computer Buid thread http://www.moddedmustangs.com/forums...ld-thread.html

January 11th, 2012, 09:48 PM	#6
ryanw I Post Entirely Way Too Much 1991 Ford Mustang GT Join Date: May 2007 Location: San Diego, California Posts: 6,063 iTrader: 0 reviews	Are you talking about pistons ? __________________ DART 331ci stroker, AFR 185 heads, Trick Flow R intake, Accufab 70mm tb, 75mm pro m Maf, 30lb injectors, jba headers, 2 1/2" x pipe flowmaster super 10 mufflers, 255 fuel pump, 3:27 gears

January 11th, 2012, 10:12 PM	#7
gripthenboost Hardcore Enthusiast 91 Mustang GT 1991 sliver GT Join Date: Apr 2010 Location: New York Posts: 1,213 iTrader: 0 reviews	Thought pistons allow the motor to rev high, But you loose strength. There less forgiving so dont beat them up too bad. Or else this will be you __________________

January 12th, 2012, 06:24 AM	#9
tyler97 Regular 1991 gt cobra clone Join Date: Apr 2011 Location: FL Posts: 374 iTrader: 0 reviews	Yes who ever had it before took it .030 over __________________ 1991 GT- Ripped torque boxes/no SFCs/306/24lb injectors/Twisted Wedge 170s/Full exhaust/Full bolt ons/X3Z computer Buid thread http://www.moddedmustangs.com/forums...ld-thread.html

January 12th, 2012, 12:54 PM	#11
StangBanger302 Hardcore Enthusiast 1992 Mustang LX 13.0 @ 105 Join Date: Jun 2010 Location: New York Posts: 2,230 iTrader: 0 reviews	I wouldn't suggest throwing nitrous on it unless you've been doing nitrous tune-ups for a while. If not, get a dyno tune by a reputable tuner. __________________ As I lay rubber down the street I pray for traction I can keep But if I spin, and begin to slide Please dear God, protect my ride

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