Head question.

[RAMDUDE]

Will the 8.0 viper heads fit onto our blocks ?

 

[05srt10carson]

Nop they won't

 

[rottenronnie]

..And you are probably aware that the 8.0L (Gen II) cylinder head (stock Intake Port) flows
50 c.f.m. less than an unported Gen III head.
Not that c.f.m. numbers are the be all and end all when comparing heads but 50 between o.e.m. heads is quite a difference.

 

[RAMDUDE]

..And you are probably aware that the 8.0L (Gen II) cylinder head (stock Intake Port) flows
50 c.f.m. less than an unported Gen III head.
Not that c.f.m. numbers are the be all and end all when comparing heads but 50 between o.e.m. heads is quite a difference.

well my question is for buying a set to have ported and built.

every set of 8.3 heads I see are a lot more money, maybe thinking buy them and have them built and save some money.

I have seen the cam roe racing offers, would that be worth my time just to do a cam upgrade instead of fooling with the heads then ?

 

[rottenronnie]

It is a considerable amount of work to change a cam in a Viper engine when it is still installed in the truck. It's NOT like changing a cam in a 440 or many of the older engines.

The o.e.m. cam is a pretty good match to the Gen III heads already. You can change the cam and make the valve open more AND stay open for a longer time, but the port itself will only flow so much anyway, and that is what matters here...

A different cam can change where the engine makes it's peak power but the increase in peak power itself with just a cam change isn't significant. We haven't seen much in the way of gains with just a cam swap (aggressive grind or not).

You could contact Roe for projected power gains with just a cam swap, but there is no miracle cam grind that will give you a big power increase with stock heads (no disrespect to Sean or anyone else intended here).

By far, your biggest power gains will be a good porting job together with a matching cam.

Ronnie

 

[REPOMAN1]

The title of this thread is great !!!

 

[ZCx]

The title of this thread is great !!!

gettin or givin:dontknow::dontknow::dontknow::toilet:

 

[RAMDUDE]

It is a considerable amount of work to change a cam in a Viper engine when it is still installed in the truck. It's NOT like changing a cam in a 440 or many of the older engines.

The o.e.m. cam is a pretty good match to the Gen III heads already. You can change the cam and make the valve open more AND stay open for a longer time, but the port itself will only flow so much anyway, and that is what matters here...

A different cam can change where the engine makes it's peak power but the increase in peak power itself with just a cam change isn't significant. We haven't seen much in the way of gains with just a cam swap (aggressive grind or not).

You could contact Roe for projected power gains with just a cam swap, but there is no miracle cam grind that will give you a big power increase with stock heads (no disrespect to Sean or anyone else intended here).

By far, your biggest power gains will be a good porting job together with a matching cam.

Ronnie

Thanks buddy, you have gave me enough answers.

 

[rottenronnie]

No Charge...

 

[chargerman426]

Any reason why they won't? Its was my understanding that the bolt pattern was the same, Gen II just flowed less.

 

[chargerman426]

Ronnie what the size of the spacer you have for the strikers?

 

[rottenronnie]

Ronnie what the size of the spacer you have for the strikers?

1.25"

 

[Ironhead]

i have a set of spacers for sale if anyone is looking