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That's why I don't understand why all these head mfg's insist on plugging in the same stone age combustion chamber into a Mopar head.

When the SBC Vortec head came out, Hot Rod did a back to back comparison between a conventional SB head and the new Vortec. IIRC they both flowed similar numbers but the V head had a smaller combustion chamber so compression was up about a 1/2 point.

On the same nothing fancy short block the V head was 70 HP better peak and did it with less than 30 deg of timing. IF you can believe HR Mag.

Trick Flow seems to have figured out it doesn't cost any more to make the right combustion chamber pattern than the wrong one. If this chamber shape works as well as the Vortec one apparently does, they will sell boat loads of them.

Kevin

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Yes the Hemi is tumble ports, something a lot harder (but possible usually at the expense of flow) to achieve with a wedge.

I also seem to keep seeing guys building the new hemi are claiming no difference firing both or only one plug, what have you found?

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Yes the Hemi is tumble ports, something a lot harder (but possible usually at the expense of flow) to achieve with a wedge.

I also seem to keep seeing guys building the new hemi are claiming no difference firing both or only one plug, what have you found?

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More good close up photos here: http://www.hotrod.com/features/1411-tric...2014-sema-show/

Looks like winner to me, but nearly even with Modern CNC Edelbrock RPM head flow. I sure like that nice 21st century 78 cc combustion chamber. If they are priced right and truly ready to bolt on, they will be very tough to beat.

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That finish on the CC is by far, 100-1 better than the finish I got on my Indy 440-1 heads. Those will never be right after they got smoothed out enough to bolt on.

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Yes the Hemi is tumble ports, something a lot harder (but possible usually at the expense of flow) to achieve with a wedge.

I also seem to keep seeing guys building the new hemi are claiming no difference firing both or only one plug, what have you found?

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When you think about it--How can there be the same timing lead required when you have 2 plugs on opposite sides of the chamber? J.Rob

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I know it makes sense but every thing I keep reading they say it don't make no difference on dyno or track even read about the guys developing it said it did not make more power but was done for emmissions I was curious if you had tried any with or without and what you found? Only reason I can think of to not change it is they are in really good locations already and the difference is too small to tell

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Yes the Hemi is tumble ports, something a lot harder (but possible usually at the expense of flow) to achieve with a wedge.

I also seem to keep seeing guys building the new hemi are claiming no difference firing both or only one plug, what have you found?

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When you think about it--How can there be the same timing lead required when you have 2 plugs on opposite sides of the chamber? J.Rob

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What's a tumble port?

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Yes the Hemi is tumble ports, something a lot harder (but possible usually at the expense of flow) to achieve with a wedge.

I also seem to keep seeing guys building the new hemi are claiming no difference firing both or only one plug, what have you found?

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When you think about it--How can there be the same timing lead required when you have 2 plugs on opposite sides of the chamber? J.Rob

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What's a tumble port?

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That's a term my Son Matt calls some of the heads I test on my flow bench. Some including some CNC'd ones sound like garbage disposals when I crank it up.

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Yes the Hemi is tumble ports, something a lot harder (but possible usually at the expense of flow) to achieve with a wedge.

I also seem to keep seeing guys building the new hemi are claiming no difference firing both or only one plug, what have you found?

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When you think about it--How can there be the same timing lead required when you have 2 plugs on opposite sides of the chamber? J.Rob

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I know it makes sense but every thing I keep reading they say it don't make no difference on dyno or track even read about the guys developing it said it did not make more power but was done for emmissions I was curious if you had tried any with or without and what you found? Only reason I can think of to not change it is they are in really good locations already and the difference is too small to tell

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Yes the Hemi is tumble ports, something a lot harder (but possible usually at the expense of flow) to achieve with a wedge.

I also seem to keep seeing guys building the new hemi are claiming no difference firing both or only one plug, what have you found?

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When you think about it--How can there be the same timing lead required when you have 2 plugs on opposite sides of the chamber? J.Rob

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I don't think Tony Bischoff would go through the trouble of rigging up dual distributors for his EMC winning G3's in 2010 and 2014 if there was not a very real power advantage. J.Rob

I know it makes sense but every thing I keep reading they say it don't make no difference on dyno or track even read about the guys developing it said it did not make more power but was done for emmissions I was curious if you had tried any with or without and what you found? Only reason I can think of to not change it is they are in really good locations already and the difference is too small to tell

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Unlike every single mopar head out there, these heads are a TRUE bolt on!
And they actually flow as advertised...and they have upgraded hardware.

This is the first of 3 heads they will offer...

Take note what they flow, the quality castings, machine work and parts, then compare them with Eddy or whoever's heads. You'll quickly see they are priced damn good!

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For you to say that, I would assume you have a set, and have personally flowed them ??? Please share the details and some photos...Thanks !

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I have to follow chain of command, sorry.

Just like the Edelbrock RPM heads are NOT RACE heads, neither are these...I see a lot of mixup about a race head vs. a performance head.
Yes you can race anything, but this first head is not a RACE head...it's intended for performance, quality, and value.
Can't please everybody that's for sure!!

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Hey Brian,

Can you tell us if either one of the next two versions will need piston changes?

Thanks
Damon

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What's the BIG deal about changing pistons?????????? Heck its done everyday. Some guys want to go fast.

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Some guys can spend a ton on a motor upgrade and others can't, pistons cost money, labor is certainly worth money even if you do it yourself, re-balancing costs money then if you want a different head someday you got to do the whole thing again... that is the big deal with piston swaps. Also you are gonna have a hard time getting anyone to stock a piston like that so you spend more on a piston and have more wait time. Gonna cost $6000+ at a shop.

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Looks like they have an intake manifold as well.

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Yep, and it looks a LOT like the E Victor that's too tall for me to get under my hood, too.

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DISCLAIMER: The opinions above have been posted by a street-car test-n-tuner with a "toy" flowbench and a rusty 10-second '73 Challenger that hasn't run since 2009

LOL

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Hey, I believe in truth in advertising...