I ported my Super Stealth heads to Max wedge, run them on my 68 Charger street car along with 440 source 512 Stroker set up

I ported my Super Stealth heads to Max wedge, run them on my 68 Charger street car along with 440 source 512 Stroker set up

I have the batwing gasket holders that allow a guy to use those heads with a billet valley plate and a high rise type intake manifold such as an Indy 400-2 or a 440-2.

AR397 is the MW version of the batwing. AR392 is the std port version of the batwing.

https://arengineering.com/home-page/valley-plates/

How did I not know about these? I just wasted a 1214 swapping an intake.

Been 10.01 @ 3,700 lbs. on pump gas through the mufflers with cnc'd Stealth heads.

7th year of them being on the the car with over 7,000 miles.

I spy some suspicious looking split loom there

Very cool! Welcome to moparts!

I always leave the hood up at the track and get quite a few lookee lous. I have smaller, black rubber hose on that now and an older guy was commenting that my vacuum advance hose had fallen off...

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…

I’ve been very happy with all of the parts I’ve ordered from 440 source. I had one issue with the lightened crank. They thru drill the end of the crank, and install a freeze plug. It leaked oil out the back of the crank after I put it in the car. Had to pull the trans to fix it. Not the end of the world.

I would imagine you have to sit in the back seat when driving - with the length of your legs and all.

I should’ve gotten a C-body….

Who is this?

Yeah, that’s the numbers I was given. That’s all I know.

I’m happy with them, I wanted to keep it looking halfway stock under the hood, and was going to open up the intake ports myself to max wedge size, until modern told me they already had a file for that on stealth heads.

Do you happen to remember what unported stage III heads flowed? My old engine has untouched heads on it, after I pulled it out of the car it got rebuilt and stuck in the corner of the garage. It ran good, but nothing like the new engine. I’m sure my dad or I will come across some car to stick it in.

I’ve been very happy with all of the parts I’ve ordered from 440 source. I had one issue with the lightened crank. They thru drill the end of the crank, and install a freeze plug. It leaked oil out the back of the crank after I put it in the car. Had to pull the trans to fix it. Not the end of the world.

Ootb Stealths Flow right around 260 on my bench.

Recut the seats, back cut the valves, blend the bowls and SSR, they’re basically right at 280.

Whittle down the guide boss, open the pinch a bit, relieve the chamber wall adjacent to the intake valve....... puts it right at about 290.

I suspect that from that point, increasing the size of the opening to MW size would be worth less than 10cfm.

The set from the pic below went on a build that was going to be using a factory x-ram.

Do you happen to remember what unported stage III heads flowed? My old engine has untouched heads on it, after I pulled it out of the car it got rebuilt and stuck in the corner of the garage. It ran good, but nothing like the new engine. I’m sure my dad or I will come across some car to stick it in.

The MW w/ 2.19s was about 11 cfm better @ 0.200”, 0.300” and 0.400”, 7.5 cfm @ 0.500”, 6.5 cfm @ 0.600, and 3.5 cfm @ 0.700”.

I take it the std port CNC port still had the 2.14 valve?

My .02 is.........
With small port heads, like a steath or Ede Head......... the main reason one would bring them out to MW size would be to facilitate the use of a MW sized manifold.
Not so much for the perceived big increase in flow from the head itself.

I’m back…apologies if you sent me a message and I missed it. I woke
up Thursday morning last week and felt fine for about an hour, then suddenly
had back pain, about a 6/10. I went into work anyway and made it until noon and
drove straight to the ER with a kidney stone from Hell.
Anyway, I’m just now catching up.
Hope you all have a great weekend.

Mike

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