Hello everyone. This is my first post here, so I thought I'd post something as an icebreaker since I spend my days on the phone helping others. I get a few questions now and then from those who are looking at the Stealth heads and wonder if they can be ported to Max Wedge. I grabbed an old MW ported casting and rough-CC'd an intake port, doing the same for the current CNC offering. CC's are rough since I didn't have my plexiglass here at work.
MW = 270ish, just in case someone wants to run a MW-sized non-raised runner head. I didn't think I'd be one of those guys, but here we are...mostly because what I'm building needs to look "correct".

Standard port Stealths are 255ish as advertised; you'll have to port them to MW if you wish to go this route vs buying TF270's or a set of Indy's.


Mike

what do they pickup in flow?

Depends on who is doing the MW port work and the flow bench being used, assuming it's being used correctly.

Mike

Just as with original max wedges, I'm sure the narrowing and rather severe port window angle is no doubt better than a standard port.....but is still limited by the lack of the raised roof and floor and the limited cross section due to the standard spring pocket and rocker arm geometry. This makes the transition to the bowl a pinch point.....but I suppose the MW logically increases the intake plenum volume and "charge" filling (or pushing through) the hole.

I always wondered where the crossover point between a low port Max wedge and say a raised standard window port like a TF 240 really shows up for a typical 550-650HP 500" combo.

It's a case where dry flow on a bench might show similar flow numbers....but in reality we know the suspended fuel doesn't 'turn' as easily as the air.

The stealth heads still look to be a great bargain, particularly when OEM sleeper appearance is a priority. 255 is a pretty decent port cc especially compared to a 906/452 port

We're well aware of those variances...so I interpret your response as meaning "Not enough, but you can do it if you want".

Just as with original max wedges, I'm sure the narrowing and rather severe port window angle is no doubt better than a standard port.....but is still limited by the lack of the raised roof and floor and the limited cross section due to the standard spring pocket and rocker arm geometry. This makes the transition to the bowl a pinch point.....but I suppose the MW logically increases the intake plenum volume and "charge" filling (or pushing through) the hole.

I always wondered where the crossover point between a low port Max wedge and say a raised standard window port like a TF 240 really shows up for a typical 550-650HP 500" combo.

It's a case where dry flow on a bench might show similar flow numbers....but in reality we know the suspended fuel doesn't 'turn' as easily as the air.

The stealth heads still look to be a great bargain, particularly when OEM sleeper appearance is a priority. 255 is a pretty decent port cc especially compared to a 906/452 port

I honestly don't know why anyone would bother with a standard port, they are barely higher performance than a comparable SB head. A 906 barely outflows an X head, raw stealth barely out performs a raw eddy SBM head. Something with 440 CID deserves a MW size port even in a very mild application. If it don't make good TQ something else is wrong beside the port volume. Heck a 392 genIII hemi has bigger ports and they make plenty of TQ in grocery getters.

Standard port heads are good for 700+ hp with a good head like the Trick Flow. So nothing to sneeze at. They work just fine for stock block stroker motors.

Yes you are.

I tell customers that std port heads are fine for stock blocks, good MW heads like CNC ported Indy heads or TF 270 heads should be paired with an aftermarket block. Customers hate to hear that advice since aftermarket blocks suck for Mopar guys. But anything over 700 or 750 hp starts to rattle the main caps and starts the process of cracking the main webs. It is just a matter of time before the block cracks. Might last a season, might last 3 or 4 before it lets go.

Yes you are.

I tell customers that std port heads are fine for stock blocks, good MW heads like CNC ported Indy heads or TF 270 heads should be paired with an aftermarket block. Customers hate to hear that advice since aftermarket blocks suck for Mopar guys. But anything over 700 or 750 hp starts to rattle the main caps and starts the process of cracking the main webs. It is just a matter of time before the block cracks. Might last a season, might last 3 or 4 before it lets go.

I honestly don't know why anyone would bother with a standard port, they are barely higher performance than a comparable SB head. A 906 barely outflows an X head, raw stealth barely out performs a raw eddy SBM head. Something with 440 CID deserves a MW size port even in a very mild application. If it don't make good TQ something else is wrong beside the port volume. Heck a 392 genIII hemi has bigger ports and they make plenty of TQ in grocery getters.

People are scared they will loose torque, then wonder why they can’t make more HP, give up and build a BBC with rectangular ports…