7000 Rpm

vetteeatr · 01-28-2002, 08:12 PM

First question is can thees motors even run at 7000 safely or will teh lifters scatter or something?

Secondly is it really worth haveing your car go up to 7000 compared to 6500? Woudl the horsepower be that much of a diffrence?

Woudl windsor senior heads ported adn polished, full length headers with some better springs and a huger cam along with a victor junior intake Be a good combo?

What would the numbers be?

ALso a rundown on why race cars rev to the moon woon be helpful thanks

Unit 5302 · 01-28-2002, 09:32 PM

KABOOOMMM!!!

While the roller cam will probably be okay, the stock valvetrain will not. The lifters will pump up, the valvesprings will fail, and the rockers probably won't like it much either. I'm not sure if the rotating assembly will like it too much to be honest. You need a serious combo to be running 7000rpm with much of an advantage over 6500rpm. To put the kind of money into an engine to have it make good power at 7000, means you need to build the engine to take 7000rpms too. Good parts are the key to running high rpms, and the Mustang 5.0 doesn't have those kind of bulletproof components from the factory. It's rev limiter is at 6250, with a redline of 5900rpm, and spinning the stock engine to redline won't net performance gains over the low mid 5's. In other words, it wasn't built to do 7000rpms.

No Groc Getter · 01-28-2002, 10:05 PM

I'll second that Unit 5302 plus say that there are plenty of folks making sick amounts of HP that are limited at 6,000 RPM.

NO SLO PK · 01-28-2002, 11:08 PM

Yeah, the valves are gonna float. Stock rod bolts might stretch to failure. Engine internals will become engine externals. The process is called "windowing" the block.

Seriously, a 7000 rpm motor can be built, but it will cost as Unit said.

01-28-2002, 08:12 PM	#1
vetteeatr Registered Member Join Date: Apr 2001 Location: Olney, Illinois, USA Posts: 212	7000 Rpm First question is can thees motors even run at 7000 safely or will teh lifters scatter or something? Secondly is it really worth haveing your car go up to 7000 compared to 6500? Woudl the horsepower be that much of a diffrence? Woudl windsor senior heads ported adn polished, full length headers with some better springs and a huger cam along with a victor junior intake Be a good combo? What would the numbers be? ALso a rundown on why race cars rev to the moon woon be helpful thanks

01-28-2002, 10:05 PM	#3
No Groc Getter Registered Member Join Date: Jan 2002 Location: Texas Posts: 30	I'll second that Unit 5302 plus say that there are plenty of folks making sick amounts of HP that are limited at 6,000 RPM. __________________ 89 LX Coupe 93 LX Coupe (Bone Stock)

01-28-2002, 11:08 PM	#4
NO SLO PK Registered Member Join Date: Mar 1999 Location: Arcadia, CA, USA Posts: 731	Yeah, the valves are gonna float. Stock rod bolts might stretch to failure. Engine internals will become engine externals. The process is called "windowing" the block. Seriously, a 7000 rpm motor can be built, but it will cost as Unit said. __________________ Russ L '91 LX - 331 w/ Procharger '03 Cobra Convertible - Pullied '94 Lightning '65 Mustang Coupe

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01-28-2002, 09:32 PM	#2
Unit 5302 Registered Member Join Date: May 1999 Posts: 5,246	KABOOOMMM!!! While the roller cam will probably be okay, the stock valvetrain will not. The lifters will pump up, the valvesprings will fail, and the rockers probably won't like it much either. I'm not sure if the rotating assembly will like it too much to be honest. You need a serious combo to be running 7000rpm with much of an advantage over 6500rpm. To put the kind of money into an engine to have it make good power at 7000, means you need to build the engine to take 7000rpms too. Good parts are the key to running high rpms, and the Mustang 5.0 doesn't have those kind of bulletproof components from the factory. It's rev limiter is at 6250, with a redline of 5900rpm, and spinning the stock engine to redline won't net performance gains over the low mid 5's. In other words, it wasn't built to do 7000rpms.