Highest flowing sbm heads?

[justinp61]

A 1320 Challenger isn't an apples to apples comparison.

I have to admit I've daydreamed about a gen lll hemi, not n/a though. I'd like to have a 78-84 SWD Dodge truck with 6.4, turbo, air, power brakes and power steering. It would be a fun driver.

It's only a daydream, I just retired and am too far invested in small blocks. Also I'm not willing to take a quarter on the dollar for my parts. Mopar guys are too cheap to pay for good parts.

 

[fishmens67]

It's a W9 R3 deal and I bought it from an engine builder that built it for a racer in Venezuela and that gentleman moved to Spain so I bought his dyno time only complete carb to pan w/ vacuum pump for 16k.....made over 900 at the time.

Thanks, that's a fair deal.

 

['68cuda416]

How handy are you? If the engine was free, you wouldn't drop a nickel to the dollar on building a "W" headed stroker in a race block. Somebody should put together a "fair market" "W" headed stroker race block" cost, and make sure it has street manners.

What's street manners? LOL...if I want dead smooth idle and acceleration I drive my Toyota...I think your missing the point as to why most have no interest in modern hot rods

 

[Rat Bastid]

You tell me what it takes to move 4400 lbs (with driver) with wheel spin - easing it out of the hole and terrible 60 ft times and still run a 12 flat box stock from the factory? It's not up to me to spell it out for ya, your much smarter than that (I assume). Would 112 mph be enough? Or do you want 115 ?? LOL.

So quick math for ya. At 4200 pounds and 115 MPH that’s about 500 honest HP. That’s a damn far cry from 600. You’d know that had you done it before.

 

[318willrun]

Well which was it? 112 or 115? Make up your mind.

I don't know, was it the run with a lot of wheel spin and had let off, or staying in it?? You know what, I don't get into the personals of "I'm king because I've did this or that". I don't lay credentials on the table for justification. Carry on

 

['68cuda416]

******* right I have. That’s how I KNOW what I’m talking about.

Let me know when you can walk into a shop and run every piece of equipment in there, and then build something from the ground up with a purpose and then hit that goal that isn’t some bubble gummers ****.

2 HP/CID on 340 inches isnt easy. You ain’t doing that with a G3 Hemi and not spend an assload on it.

So yeah, I’ve done it. And now I don’t have to rent the dyno time. I can walk into my shop and do it.

You da man.....

 

[318willrun]

So quick math for ya. At 4200 pounds and 115 MPH that’s about 500 honest HP. That’s a damn far cry from 600. You’d know that had you done it before.

And if you read a word I said, you know better than to even post what you just posted. I said with cam swap and exhaust swap, they'll make 600 hp and that is the cheapest 600 hp with reliability you can about get. My opinion. And it was for the OP of this thread!

 

[B3422w5]

Besides driving my son's old '15 Scat Pak...... I eye-witnessed a stock 1320 Challenger (6.4 na 485 factory net hp) turn 12 flat WITHOUT traction. Name one other small block mopar from the factory... ANY available to the public... that would even scratch the surface of that time right off the show room floor. A 2950 pound 340 Duster?? 340-6 pack E body?? C'mon, you ain't serious..... The lead-sled at over 4100 lbs would eat 'em for breakfast while listening to blue tooth, watch them disappear in the back up camera and having the air conditioning blowing. But I get it, very few are realist.

that 340 technology is over 50 years old.. the gen 3 stuff is new. Of course there are refinements ….
you should spend your time( if you continue to make such comparisons) about how a 340 can run circles around a Dusenberg…. The technology advancements are comparable.
I could buy a bad *** Gen 3 if I wanted to, and stuff it in something cool. But I have zero interest in doing so, no matter how well it might run.
your confusing old school passion with perceived ignorance of new technology. Most are well aware of the new stuff and it’s ability. Doesn’t mean you prefer it in /on your hobby car‘s engine bay though

Some folks are getting WAY out over they’re ski’s on this stuff..lol

 

[340sFastback]

What about Original Poster who wants the 350 CFM heads for some unknown combo unknown budget? Forget about him and go off on tangents new hemis are fast, 1,000 hp on stock blocks, no one looks at the late models when out cruising, late models faster then the classics, so and so is smart, so and so is full of it, chinese tubos, fast on a chevy budget, turtles ect ect ect.....

 

[Rat Bastid]

I don't know, was it the run with a lot of wheel spin and had let off, or staying in it?? You know what, I don't get into the personals of "I'm king because I've did this or that". I don't lay credentials on the table for justification. Carry on

Right. You said something you couldn’t back up. I don’t go to the track much anymore, but it’s the same as it ever was. Guys think they have “X” HP but they don’t when you look at the MPH and the weight.

And the spinning tires won’t affect the MPH very much.

 

[318willrun]

that 340 technology is over 50 years old.. the gen 3 stuff is new. Of course there are refinements ….
you should spend your time( if you continue to make such comparisons) about how a 340 can run circles around a Dusenberg…. The technology advancements are comparable.
I could buy a bad *** Gen 3 if I wanted to, and stuff it in something cool. But I have zero interest in doing so, no matter how well it might run.
your confusing old school passion with perceived ignorance of new technology. Most are well aware of the new stuff and it’s ability. Doesn’t mean you prefer it in on your hobby car‘s engine bay though

No, you are wrong. I simply offered the OP of this small block mopar head high flow thread an option to a great flowing head. All the bashing came from old timers that get disgruntled for me bringing it in the conversation. But I believe my point was legit, and relevant to the OP's request, so let them attack on...

 

['68cuda416]

What about Original Poster who wants the 350 CFM heads for some unknown combo unknown budget? Forget about him and go off on tangents new hemis are fast, 1,000 hp on stock blocks, no one looks at the late models when out cruising, late models faster then the classics, so and so is smart, so and so is full of it, chinese tubos, fast on a chevy budget, turtles ect ect ect.....

Maybe when he was hit with a dose of reality and that he would have at today's prices 10-12k for a complete badass everything including rockers into a set of head he was fantasizing about he probably puked

 

[Rat Bastid]

What about Original Poster who wants the 350 CFM heads for some unknown combo unknown budget? Forget about him and go off on tangents new hemis are fast, 1,000 hp on stock blocks, no one looks at the late models when out cruising, late models faster then the classics, so and so is smart, so and so is full of it, chinese tubos, fast on a chevy budget, turtles ect ect ect.....

He got his answer. One dude said flow is everything. So buy your heads based on flow numbers and live with the steaming pile of **** you wanted.


There is so much more to picking a cylinder head than flow that flow is pretty low on my list of what I look at first.

Shape, shape and SHAPE is what you look at first. I already gave an example of that. This time I’ll add some detail.

Lets take 2 heads. Both have some work done to then. The lowly cast iron, open chamber W2 and let’s just say the Edelbrock, or the SM. Either one.

Ported, they both flow 280 CFM with 2.055 valves. You tell me which one will make more power. It shouldn’t be hard to figure it out.


That is why you do not buy your cylinder heads or carbs by CFM.

 

[340sFastback]

Maybe when he was hit with a dose of reality and that he would have at today's prices 10-12k for a complete badass everything including rockers into a set of head he was fantasizing about he probably puked

Dreams of going fast on a chevy budget evaporated....

 

['68cuda416]

No, you are wrong. I simply offered the OP of this small block mopar head high flow thread an option to a great flowing head. All the bashing came from old timers that get disgruntled for me bringing it in the conversation. But I believe my point was legit, and relevant to the OP's request, so let them attack on...

Did you miss one important piece of information that was given by the OP and that was that he already had a nicely built 418" LA based short block...so again why are we even talking about the Gen 3?

 

[318willrun]

Right. You said something you couldn’t back up. I don’t go to the track much anymore, but it’s the same as it ever was. Guys think they have “X” HP but they don’t when you look at the MPH and the weight.

And the spinning tires won’t affect the MPH very much.

i can back up, but this thread isn't about me. It's about SBM heads, which the last I checked Gen III hemi's are small blocks. This is how threads get sideways. Someone offers something that's relevant and here comes the crowd. And yet, not a one has produced any evidence or even said I was wrong. Just "I HATE NEW HEMI's" is all there is. Which is nothing.

 

['68cuda416]

i can back up, but this thread isn't about me. It's about SBM heads, which the last I checked Gen III hemi's are small blocks. This is how threads get sideways. Someone offers something that's relevant and here comes the crowd. And yet, not a one has produced any evidence or even said I was wrong. Just "I HATE NEW HEMI's" is all there is. Which is nothing.

YOU AND ONLY YOU got this thread sideways.....he HAS A 418" LA BASED SHORT BLOCK he was looking for heads for........dam dude......

 

[318willrun]

i'm not a truck driver, so I'll leave the truck stop diner and let them ramble on. To the OP, good luck!

 

['68cuda416]

i'm not a truck driver, so I'll leave the truck stop diner and let them ramble on. To the OP, good luck!

Yeah you got the good luck part right.....good luck fitting your beloved Gen 3 heads on his LA based short block

 

[Rat Bastid]

i can back up, but this thread isn't about me. It's about SBM heads, which the last I checked Gen III hemi's are small blocks. This is how threads get sideways. Someone offers something that's relevant and here comes the crowd. And yet, not a one has produced any evidence or even said I was wrong. Just "I HATE NEW HEMI's" is all there is. Which is nothing.

Dont be making stuff up. I don’t “hate” new Hemi’s or any Hemi. I just happen to know that NA the Hemi is a pig. It needs RPM and most guys on this forum are deathly afraid of anything over 6k. Since I have made power at 8k plus I can tell you it’s not easy.

So it has nothing to do with “hate”. It has to do with the design of the Hemi head. It is what it is and you can’t change that.

 

[B3422w5]

WHAT WAS THE MPH? The ET doesnt mean ****. You know that and yet you still post ET’s.

Actually most of the new Gen stuff( Mustang, Camaro , Challenger) put up big MPH numbers for the given ET
not uncommon to see 12 sec 120+ mph passes at the track, and 130 mph 11 sec passes.
I spend a ton of time at the track, see it all the time.
the heavier, newer cars really charge at the big end, really impressive for given ET….very often

 

[Rat Bastid]

Actually most of the new Gen stuff( Mustang, Camaro , Challenger) put up big MPH numbers for the given ET
not uncommon to see 12 sec 120+ mph passes at the track, and 130 mph 11 sec passes.
I spend a ton of time at the track, see it all the time.
the heavier, newer cars really charge at the big end, really impressive for given ET….very often

Is that NA?

 

['68cuda416]

Actually most of the new Gen stuff( Mustang, Camaro , Challenger) put up big MPH numbers for the given ET
not uncommon to see 12 sec 120+ mph passes at the track, and 130 mph 11 sec passes.
I spend a ton of time at the track, see it all the time.
the heavier, newer cars really charge at the big end, really impressive for given ET….very often

I'm also sure you notice when your at the tracks that when the modern hot rod class comes up it becomes bathroom break and hit the concession stand time

 

[B3422w5]

I'm also sure you notice when your at the tracks that when the modern hot rod class comes up it becomes bathroom break and hit the concession stand time

Absolutely..lol
seen one, seen them all type deal…
but I hurry back for the junior dragsters…haha

 

[fishmens67]

Dont be making stuff up. I don’t “hate” new Hemi’s or any Hemi. I just happen to know that NA the Hemi is a pig. It needs RPM and most guys on this forum are deathly afraid of anything over 6k. Since I have made power at 8k plus I can tell you it’s not easy.

So it has nothing to do with “hate”. It has to do with the design of the Hemi head. It is what it is and you can’t change that.

only 8k, Shilo's W8 makes power over 9200. That's spinning her up. lol
I forgot, your old.