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Chrysler died without a whimper 12/16/14


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I'm aware of that. I'm also aware thay the base design for the ZJ was done by AMC. What Chrysler did to the 4.0 by giving it 190hp was pretty amazing at the time. Remember that during those same years, the 5.2 in the Ram was only putting out 170hp.

I don't consider an additional 13 horsepower to be pretty amazing. Hard to say if AMC could have managed the same feat in three additional years or not. They did develop the motor itself in just over two years.

 

From a 1965 model year design.

So it was first put down on paper in 60-61?

They sure had plenty of time to develop it but it remained basically the same from then until 1986.

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I'm aware of that. I'm also aware thay the base design for the ZJ was done by AMC. What Chrysler did to the 4.0 by giving it 190hp was pretty amazing at the time. Remember that during those same years, the 5.2 in the Ram was only putting out 170hp.

I don't consider an additional 13 horsepower to be pretty amazing. Hard to say if AMC could have managed the same feat in three additional years or not. They did develop the motor itself in just over two years.

 

 

The 13 additional HP isn't amazing by itself, but when you consider the much better flow characteristics and the 100% reliability improvement over AMC's cobbled together Renix kludge system, that's amazing.

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I'm aware of that. I'm also aware thay the base design for the ZJ was done by AMC. What Chrysler did to the 4.0 by giving it 190hp was pretty amazing at the time. Remember that during those same years, the 5.2 in the Ram was only putting out 170hp.

I don't consider an additional 13 horsepower to be pretty amazing. Hard to say if AMC could have managed the same feat in three additional years or not. They did develop the motor itself in just over two years.

 

From a 1965 model year design.

So it was first put down on paper in 60-61?

They sure had plenty of time to develop it but it remained basically the same from then until 1986.

The 4.0 was based on the AMC I4 2.5L which was first available in 1983. The 4.0 became available in 87 and remained basically the same until 2006.

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I'm aware of that. I'm also aware thay the base design for the ZJ was done by AMC. What Chrysler did to the 4.0 by giving it 190hp was pretty amazing at the time. Remember that during those same years, the 5.2 in the Ram was only putting out 170hp.

I don't consider an additional 13 horsepower to be pretty amazing. Hard to say if AMC could have managed the same feat in three additional years or not. They did develop the motor itself in just over two years.

 

 

The 13 additional HP isn't amazing by itself, but when you consider the much better flow characteristics and the 100% reliability improvement over AMC's cobbled together Renix kludge system, that's amazing.

 

The Renix system was highly regarded at the time. Hesco developed the mutiport fuel injection for Chrysler and most likely would have developed it for AMC as Hesco had a long standing previous business relationship with AMC.

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Hesco developed the mutiport fuel injection for Chrysler and most likely would have developed it for AMC as Hesco had a long standing previous business relationship with AMC.

As Lee lets me know every time I stop in.  :yes:

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Hesco developed the mutiport fuel injection for Chrysler and most likely would have developed it for AMC as Hesco had a long standing previous business relationship with AMC.

As Lee lets me know every time I stop in.  :yes:

 

Are you from Birmingham? :thumbsup:

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Hesco developed the mutiport fuel injection for Chrysler and most likely would have developed it for AMC as Hesco had a long standing previous business relationship with AMC.

As Lee lets me know every time I stop in.  :yes:

 

Are you from Birmingham? :thumbsup:

 

 

No, just up north a bit in Marshall county.

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HO myth buster

 

 

Renix in 90 made 182 HP. HO in 91 made 190 HP. That's 8 HP difference. 

 

HO only made more HP than Renix at higher RPMs and not a bit more torque. HO had 58 mm throttle body versus a 52 mm throttle body on a Renix and also had a better design header. See where I'm going with this?

 

The whole 8HP was not mostly from the head, but from the bigger TB and better exhaust manifold.

 

Put a 60mm TB from www.strokedjeep.com on your present head, eliminate the "crush" in your headpipe with proper re-routing, and go for it. 

 

HO stands for Highly Overrated.

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Agreed on the HO. Never had a problem with my Renix era Jeeps. 88 is the perfect year to me.

 

Highly disagree on the VM engines. You couldn't pay me enough to put one in something. Not getting the new Cummins (the sole thing Ram has had going for it for 20 years) to use a VM diesel was the stupidest thing Fiat could have possibly done with the brand. Even if the new VM diesel is a good motor it's sure as $#!& not a Cummins and the name doesn't carry the weight or selling power that Cummins does.

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HO myth buster
 
 
Renix in 90 made 182 HP. HO in 91 made 190 HP. That's 8 HP difference. 
 
HO only made more HP than Renix at higher RPMs and not a bit more torque. HO had 58 mm throttle body versus a 52 mm throttle body on a Renix and also had a better design header. See where I'm going with this?
 
The whole 8HP was not mostly from the head, but from the bigger TB and better exhaust manifold.
 
Put a 60mm TB from www.strokedjeep.com on your present head, eliminate the "crush" in your headpipe with proper re-routing, and go for it. 
 
HO stands for Highly Overrated.
__________________

 

 

You must have posted that same old drivel 472 times now..................... :shake:

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HO myth buster
 
 
Renix in 90 made 182 HP. HO in 91 made 190 HP. That's 8 HP difference. 
 
HO only made more HP than Renix at higher RPMs and not a bit more torque. HO had 58 mm throttle body versus a 52 mm throttle body on a Renix and also had a better design header. See where I'm going with this?
 
The whole 8HP was not mostly from the head, but from the bigger TB and better exhaust manifold.
 
Put a 60mm TB from www.strokedjeep.com on your present head, eliminate the "crush" in your headpipe with proper re-routing, and go for it. 
 
HO stands for Highly Overrated.
__________________

 

 

You must have posted that same old drivel 472 times now..................... :shake:

 

Yep. Accurate info deserves good distribution and dissemination. 

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Agreed on the HO. Never had a problem with my Renix era Jeeps. 88 is the perfect year to me.

 

Highly disagree on the VM engines. You couldn't pay me enough to put one in something. Not getting the new Cummins (the sole thing Ram has had going for it for 20 years) to use a VM diesel was the stupidest thing Fiat could have possibly done with the brand. Even if the new VM diesel is a good motor it's sure as $#!& not a Cummins and the name doesn't carry the weight or selling power that Cummins does.

Who said Cummins was being discontinued in the bigger trucks?

 

The vM is going into 1/2 ton trucks and Grand Cherokees. See what Gale Banks thinks of them. 

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Agreed on the HO. Never had a problem with my Renix era Jeeps. 88 is the perfect year to me.

 

Highly disagree on the VM engines. You couldn't pay me enough to put one in something. Not getting the new Cummins (the sole thing Ram has had going for it for 20 years) to use a VM diesel was the stupidest thing Fiat could have possibly done with the brand. Even if the new VM diesel is a good motor it's sure as $#!& not a Cummins and the name doesn't carry the weight or selling power that Cummins does.

Who said Cummins was being discontinued in the bigger trucks?

 

The vM is going into 1/2 ton trucks and Grand Cherokees. See what Gale Banks thinks of them. 

 

I didn't say it was being discontinued. I said they're not getting the NEW Cummins and they're losing exclusive use of it since Nissan is getting the new one in the Titans.

 

I can slap a nice header on a piece of $#!&, it's still going to be a piece of $#!&.

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Agreed on the HO. Never had a problem with my Renix era Jeeps. 88 is the perfect year to me.

 

Highly disagree on the VM engines. You couldn't pay me enough to put one in something. Not getting the new Cummins (the sole thing Ram has had going for it for 20 years) to use a VM diesel was the stupidest thing Fiat could have possibly done with the brand. Even if the new VM diesel is a good motor it's sure as $#!& not a Cummins and the name doesn't carry the weight or selling power that Cummins does.

Who said Cummins was being discontinued in the bigger trucks?

 

The vM is going into 1/2 ton trucks and Grand Cherokees. See what Gale Banks thinks of them. 

 

I didn't say it was being discontinued. I said they're not getting the NEW Cummins and they're losing exclusive use of it since Nissan is getting the new one in the Titans.

 

I can slap a nice header on a piece of $#!&, it's still going to be a piece of $#!&.

 

You shoulda heard all the negativism about the XJ from the Jeep purists when it came out.....

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HO myth buster

 

 

Renix in 90 made 182 HP. HO in 91 made 190 HP. That's 8 HP difference.

 

HO only made more HP than Renix at higher RPMs and not a bit more torque. HO had 58 mm throttle body versus a 52 mm throttle body on a Renix and also had a better design header. See where I'm going with this?

 

The whole 8HP was not mostly from the head, but from the bigger TB and better exhaust manifold.

 

Put a 60mm TB from www.strokedjeep.com on your present head, eliminate the "crush" in your headpipe with proper re-routing, and go for it.

 

HO stands for Highly Overrated.

__________________

Is the Renix 4.0 a good engine? Undoubtedly. Maybe in stock form the 4.0HO didn't blow the Renix version out of the water, BUT the power potential of the HO engines, from what I've seen, outclasses the old Renix mills. There's a reason why pretty much everyone who makes a stroker either uses a HO engine or ends up with the HO top end (head, TB, and later HO intake manifold).

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Image Not Found

Oh no you didn't LOL

 

That cartoon was given to me by the guys at JeepTech when I worked as Service Manager at a Jeep dealer. I sent a copy to Hornbrod. Hornbrod changed the sign wording though. It originally said "Chrysler Jeep/Eagle School for the Gifted." 

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That cartoon was given to me by the guys at JeepTech when I worked as Service Manager at a Jeep dealer. I sent a copy to Hornbrod. Hornbrod changed the sign wording though. It originally said "Chrysler Jeep/Eagle School for the Gifted."

LIES! Anyone who believes that must drive a Renix.   :D   :yes:

 

 

Jeep dealerships loved the Renix models because they generated so much extra revenue in the dealer's service department.

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Is the Renix 4.0 a good engine? Undoubtedly. Maybe in stock form the 4.0HO didn't blow the Renix version out of the water, BUT the power potential of the HO engines, from what I've seen, outclasses the old Renix mills. There's a reason why pretty much everyone who makes a stroker either uses a HO engine or ends up with the HO top end (head, TB, and later HO intake manifold).

 

Care to elaborate? I believe the popularity of the HO builds are due to their abundance and not to any real technical advantage. 

 

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Is the Renix 4.0 a good engine? Undoubtedly. Maybe in stock form the 4.0HO didn't blow the Renix version out of the water, BUT the power potential of the HO engines, from what I've seen, outclasses the old Renix mills. There's a reason why pretty much everyone who makes a stroker either uses a HO engine or ends up with the HO top end (head, TB, and later HO intake manifold).

 

Care to elaborate? I believe the popularity of the HO builds are due to their abundance and not to any real technical advantage.

Read up on the head design of the renix vs HO engines.

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Is the Renix 4.0 a good engine? Undoubtedly. Maybe in stock form the 4.0HO didn't blow the Renix version out of the water, BUT the power potential of the HO engines, from what I've seen, outclasses the old Renix mills. There's a reason why pretty much everyone who makes a stroker either uses a HO engine or ends up with the HO top end (head, TB, and later HO intake manifold).

Care to elaborate? I believe the popularity of the HO builds are due to their abundance and not to any real technical advantage.

Read up on the head design of the renix vs HO engines.

 

Yes the HO heads flow better. But higher flow doesn't generally improve low end torque, which is the purpose of a stroker motor. What's so much better about the rest of the HO engine?

 

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