Ha ha. I just blew beer out my nose on that last suggestion. "Something to think about while your wife's talking about something you don't care about."
I remember when I was a teenager and bought some slant plug GM heads that allowed a higher compression rate versus the stock 350 370 HP heads...apparently the better flame propagation made it handle a higher CR
About 30 years ago going through the evolution. Home ported fuellies with straight plug,, then Dart2s with angle plug then to Edelbrock Victor 23 deg race heads again angle plug. And using the same custom 1 3/4" headers. And the plugs all lobbed in different spots within about an inch circle. With the Edelbrocks I had to select plug brand on plug length and then cut half the nut away as well as cut the plug lead and boot. Then it all fitted fine though plug boots did not last that long and the lead seperators needed to be in a very specific spot as well. 500whp in 2000
Hey Eric, Tim here.......never thought about the flow diffrences between the 2......it was that the plug is angled twd the exhaust valve, to keep it in the hottest part of the chamber, to fascilitate effiecient burn of the incoming charge........so its nice that the angle plug DOES flow more, but i thought that was more about gettin an efficient burn (and potential less timing) from ur head, NOT flow..........correct me if i'm wrong....the MAIN deal is to get an efficient burn of the charge.....flow is a nice extra.....
If I was rich, I would purchase a set of MBE heads and intake manifold. Having them would make me build my own headers and the results would be phenomenal.
In '71 with first angle Plugs came out for small blocks. And using TRW 12.5 to 1 dome pistons. We picked up two tenths.. That was class racing cars.. It never was a mystery for class racers. Your running 12.10. Pop new heads on. Bingo! 11.90.. Thats big time proof to me??.. Was sold in '71 already!!!.. Really showed up with dome pistons...
Yeah unfortunately I’m stuck with straight plug heads, simply because to have headers that fit an early Chevelle they are all for straight plug. I priced headers that fit angle plug heads; $1500 fricken dollars. Stupidly ridiculous!
Eric, What is an AFR 227/235 head? I have an engine come in that has AFR 227/235 SM engraved on the front of the head. I cant find anything on AFRs website.🤔🤔🤔
I have read many articles that say angle milling on a SBC can improve high lift 10 cfm or more. I am talking about .125-.150ths angle mill. It would be awesome if you could confirm this?
I switched from 195 afr competition heads to brodix dragon slayer heads both angle plug but with brodix I had to switch headers I guess brodix raised exhaust port more than the afr heads.
Lets call it 5 hp then - a combo of low lift flow differences and scavenging behavior. What intrigues me is [for the same cam] will peak VE move at all? I think it might...
Buy a set test them , then raffle those off. Which brings subscribers. A late edit - how about raffling off the heads you had to stop because of a attempted fraud situation?
Hey, i know a guy who knows a guy who knows a guy who has a cousin who knows a guy who works at AFR. I'll see if they can send you some heads to test. Lol Seriously though. I appreciate your efforts. You do the racing community proud.
Авто/Мото
Thanks for answering a age old question.
Hey Eric. Thank you for the patience and help. This is very interesting. Really enjoy these videos
Ha ha. I just blew beer out my nose on that last suggestion.
"Something to think about while your wife's talking about something you don't care about."
Keep working and you'll get there, it just takes time.
Thanks for the video because I’ll definitely be thinking about this when the wife gets home after drinking wine with co workers
I remember when I was a teenager and bought some slant plug GM heads that allowed a higher compression rate versus the stock 350 370 HP heads...apparently the better flame propagation made it handle a higher CR
Have no idea, but the center water passages look real nice!
About 30 years ago going through the evolution. Home ported fuellies with straight plug,, then Dart2s with angle plug then to Edelbrock Victor 23 deg race heads again angle plug. And using the same custom 1 3/4" headers. And the plugs all lobbed in different spots within about an inch circle. With the Edelbrocks I had to select plug brand on plug length and then cut half the nut away as well as cut the plug lead and boot. Then it all fitted fine though plug boots did not last that long and the lead seperators needed to be in a very specific spot as well. 500whp in 2000
Lmfao how you ended the video was absolute gold 🤣 🤟
Great info man we appreciate your test results we know it takes time can you help us with some LS numbers
The wife comment was too funny! ROTF!!!
I've always understood the angle plug heads was beneficial from keeping the flame from blowing out with Dome Pistons
I was curious about the angle plug vs straight plug deal but cool video it would be awesome to see Dyno difference between the 2
Hey Eric,
Tim here.......never thought about the flow diffrences between the 2......it was that the plug is angled twd the exhaust valve, to keep it in the hottest part of the chamber, to fascilitate effiecient burn of the incoming charge........so its nice that the angle plug DOES flow more, but i thought that was more about gettin an efficient burn (and potential less timing) from ur head, NOT flow..........correct me if i'm wrong....the MAIN deal is to get an efficient burn of the charge.....flow is a nice extra.....
Very cool analysis. I'd love to see that dyno test come to fruition. I think I know where those straight plug heads are going. 😊
More important, do they do a better job of lighting the air fuel mixture?
If I was rich, I would purchase a set of MBE heads and intake manifold. Having them would make me build my own headers and the results would be phenomenal.
Thank you for the video!!
Great information
This was great, I was suprised by the difference.,
Me too.
Better channel then so many of those with all those viewers.
Thank you
Great video
Thank you
In '71 with first angle Plugs came out for small blocks. And using TRW 12.5 to 1 dome pistons. We picked up two tenths.. That was class racing cars.. It never was a mystery for class racers. Your running 12.10. Pop new heads on. Bingo! 11.90.. Thats big time proof to me??.. Was sold in '71 already!!!.. Really showed up with dome pistons...
Right on
We have a set of cast iron angle plug sbc with no markings on them
Thank you for your knowledge 💪🏽 🙏 USA 🇺🇸 USA 🇺🇸 USA 🇺🇸
just spitballing but I guess the straight plug might be better for more consistent burn since its closer to the middle?????
If a head were to trade high lift for low lift numbers, what would the effect be on power?
Haven’t watched it yet but isn’t it just for plug angle for the flame I mean
Any suggestions for long tube headers that will fit angle plug heads? Had to dimple mine.
Also for the factory heads can’t they all be different especially the yrs gone by
Yeah unfortunately I’m stuck with straight plug heads, simply because to have headers that fit an early Chevelle they are all for straight plug. I priced headers that fit angle plug heads; $1500 fricken dollars. Stupidly ridiculous!
So angle plug head better drivability maybe
What particular heads are on your truck ?
Eric, What is an AFR 227/235 head? I have an engine come in that has AFR 227/235 SM engraved on the front of the head. I cant find anything on AFRs website.🤔🤔🤔
I have read many articles that say angle milling on a SBC can improve high lift 10 cfm or more. I am talking about .125-.150ths angle mill. It would be awesome if you could confirm this?
I have a video about small chamber vs large chamber and that is with flow numbers.
I switched from 195 afr competition heads to brodix dragon slayer heads both angle plug but with brodix I had to switch headers I guess brodix raised exhaust port more than the afr heads.
Slower same or faster?
There is the issue,, no two plug locations are the same.
Angle plug heads were good for 10hp
Looks like maybe 1%, measurable but fairly insignificant only a dyno test can tell. Correct information is always good no matter the results.
Lets call it 5 hp then - a combo of low lift flow differences and scavenging behavior. What intrigues me is [for the same cam] will peak VE move at all? I think it might...
@@flinch622 I`d like to see a back to back test and watch where the max torque is and at what rpm it occurs
Hahahahaha I love the ending comment
The truth is the burn is better making more power.
Back before angle plug heads the gap was turned or indexed to be on the exhaust valve for the burn and hp gain
Chevy put them on because they definitely make more power
Buy a set test them , then raffle those off. Which brings subscribers. A late edit - how about raffling off the heads you had to stop because of a attempted fraud situation?
The angels will make more power with a dome piston and poor fuel.they don't detonate as easily
With
Hey, i know a guy who knows a guy who knows a guy who has a cousin who knows a guy who works at AFR. I'll see if they can send you some heads to test. Lol
Seriously though. I appreciate your efforts. You do the racing community proud.
Not much difference from bench to truck angles.
Right on