What are these holes for?
Cylinder Head Porting and Power Production
- Thread starter RAMM
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With all this name dropping and trumpeting all I could think of was this:Now this is entertainment
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Head Bolt hole recess.
factory small block head castings with some time in them work better than most people can imagine.
Small block in Demon with 587 heads and a .590 Racer Brown flat tappet cam. 1.260 60ft.--6.09 at 111 1/8th mile --9.68 at 136 1/4 mile--No NOS
factory small block head castings with some time in them work better than most people can imagine.
Small block in Demon with 587 heads and a .590 Racer Brown flat tappet cam. 1.260 60ft.--6.09 at 111 1/8th mile --9.68 at 136 1/4 mile--No NOS
Ahhh, where he broke through. Gotcha.
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Thanks. His case is an extreme use of the head. He is limited by class. It is an excellent use of the head.
Now let’s do similar to an aluminum head.
Now let’s do similar to an aluminum head.
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https://www.hotrod.com/articles/cylinder-head-swirl-and-tumble/
"Optimized swirl-port heads sometimes flow less air on a flow bench but still yield measurable power gains on a running engine."
Why?
"Optimized swirl-port heads sometimes flow less air on a flow bench but still yield measurable power gains on a running engine."
Why?
Quality of air and fuel flow. It’s what I was saying earlier.
I still would not use a swirl port head or one ported by this guy for all out racing efforts. Or even more street beasts.
I still would not use a swirl port head or one ported by this guy for all out racing efforts. Or even more street beasts.
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I don't think so
"I had a stock crank .04 overbored 360 in the Demon that went 10.25 at 129.99 mph. Ported 587 heads,.590 racer brown flat tappet cam, victor 340 intake, crane gold 1.6 rockers, 11.75 to 1 comp ratio. Motor in car now is a .04 over 360/ w a 4.100 stroke crank, [418 c.1.]. Still has the racer brown .590 cam and ported 587 heads, a little adtnl. work to heads, flat top piston out of the hole .080, 13 to 1 comp ratio, Victor 340 intake, Crane 1.6 rockers. Burns 110 octane race gas or would be fully streetable. Never over 190 degrees even when it's near 100 deg. outside. Has gone as fast as 9.68 at 135 mph and as far as 450 ft on the rear wheels. Definetly over 400 to 500 horse . Not to shabby for a junkyard headed small block in a car that weighs 3060lbs. I never recall seeing a brand X sm block w/ junkyard heads anywhere near my e.t. at or near 3060lbs. I chase alcohol burning, roller cammed, aluminum headed sm block chevys all the time."
“I don't think so”
Oh I do, so very much. You keep pushing the OE iron head. That’s fine. So far you claim it makes more power than a W2 and it’s better than an aluminum head.
You’ve been shut down before and continue to argue against the facts.
Enjoy your night.
Oh I do, so very much. You keep pushing the OE iron head. That’s fine. So far you claim it makes more power than a W2 and it’s better than an aluminum head.
You’ve been shut down before and continue to argue against the facts.
Enjoy your night.
Just the way u were bragging them up. Kim
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I'm not pushing anything. If you think this discussion is about heads you're sadly mistaken as his heads were used to prove a point that you now want to totally ignore. If think airflow is everything than how come Dan makes power with the stuff you think isn't worthy of your time. There's more to making power than just airflow. If you ignore the fueling aspect then an engine is just an air pump and you need bigger heads. Oh and if you build an engine with all that exotic stuff and it doesn't make the power you think it should then it needs bigger heads....
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Now that you realize how plain they really are doesn't now make you curious as to how he's making power?
RAMM
Well-Known Member
Not really, he obviously has a handle on everything, especially chassis. I bet his stroker makes no more than 600ish hp and that's just an off the cuff guess. Don't get me wrong, it's an amazing and rarely replicated feat, Lord knows I couldn't do it or even tell you how. I do know how much a good chassis is worth, = priceless. J.Rob
Incorrect and if you have been reading my posts on this subject (not just cylinder heads) you would have never ever wrote what you wrote.
Let’s revisit his head choice and what he could do by moving away from OE iron. Would be to with aluminum if he could?
Yea... thought so...
Let’s revisit his head choice and what he could do by moving away from OE iron. Would be to with aluminum if he could?
Yea... thought so...
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Lets get this straight!
YOU started this thread because you're smart enough to realize that there is something missing from your understanding about making power did you not?. Now the journey really begins and you'll notice no one really wants to discuss this because it challenges their dogmas about engines and how they work. I leave you with this quote from some one who new more about combustion and carburation then I could ever get the chance to learn:
"People often talk about engines as being air pumps but if you only consider them from that point of view you miss the interaction of the fuel and thats the real reason for an engine isnt it. its actually there to convert chemical energy into mechanical energy and to do that you have to follow the chemistry not just the air pump"
Not at all. Kim
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Lets revisit the fact that he's making power with the stuff you all think you cant. Your still caught on airflow.......
yellow rose
Overnight Sensation
He blew through the head where the short head bolt is located. That happens on every iron head I do. You make a spacer to run the long bolt/stud there and forget it. I epoxy mine in.
That does not look like that head has a lot of swirl. I’d like to see his swirl numbers. I’m betting they are pretty low.
This is the basic montra people sing and while there is truth to this, it is also what should be the beginning, not the whole story.
Incorrect on both accounts.
Give a second to get up out of my warm comfy house into the sub 30* night. BRB
Sure your pushing iron swirl port heads. You can’t get off the head itself. You have shown how this guy ported and combinationed the engine package to go fast. Very cool by the way.
Then you say his heads were used specifically to prove a point, which remains unknown except, maybe, that he can go fast with factory iron?
You say I ignore these heads, that power is more than just the heads? Obviously you don’t read my replies left here at FABO. In other words, your more than just wrong but dead nutz balls on accurate wrong.
By this, it seems to me that you haven’t read or simply taken the time to understand what I have previously posted here at FABO. Thanks for not reading and assuming poorly.
Double negative! If I thought so much, the. Why am I sitting on this stack of the same cylinder heads and this rotating assembly designed for a 352 cid?
I guess someone isn’t reading.... Hysteric....
Hello?!?! Hysteric.....
You keep throwing **** my way assuming, misquoting, twisting my words, out right lies, your caught red handed or not reading and understanding what I write but seem obsessed on pushing bullshit on the thread.
It ain’t sticking to this teflon coated fish.
Third time tonight!!!!
Shutdown!!!
Care to go for more?
I’m bored with proving you wrong three times in one night. Are you this kind of type of weirdo that likes abuse?
Seeiously!
WTF is wrong with you?!?!
Phreakish
Well-Known Member
He's read all the magazines which makes him smarter than all of us, but he's upset we don't realize it and treat him accordingly for it.
It would be neat if he'd at least state something instead of playing "gotcha" with arguments no one is making.
yellow rose
Overnight Sensation
If you look close at the heads he posted you’ll notice they have very little swirl. In fact, much less than I use on my street/strip stuff and I really HATE swirl. It is a required evil sometimes.
If you also notice, the guy said he stuck his piston .080 out of the hole. Been advocating for getting the pistons out of the holes since right after HS. I’ve never had to go that far out, but I would if I had to.
That and he keeps pointing to the thread on the other board. This build shows really well what this guy can do. That doesn’t mean we all here are capable of mimicking his effort. If it was that easy, we all would be doing it. I also find the $1600 price tag interesting as the thread is 2015. So, $1600 plus the price I have to pay for the heads (And acco. parts?) plus shipping to and from the porter.
Sorry, but don’t remember the Edelbrock heads coating that much then.
Did hysteric say he pushed the slugs outta the hole or is it in the original post on the other board.
Im tired... later on guys, it’s midnight....
Oh! Before I forget, his engine combo is far out of the opening statement range RAMM posted in post number 1!
Phreakish
Well-Known Member
Wouldn't high compression, raised dome and an optimal cam explain the "mysterious" low timing requirement and the high output of the one combo being bandied about? Seems the right cam with 11.7:1 could take huge advantage of the "supercharging" effect of narrow LSA and make for a stout combo while lowering the timing requirement. Would also take a very optimized chassis with perfect gearing and clutch/converter - still, there's no secret sauce there. Just a dedicated and talented racer.
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