More of BDC's handy work!!!
08-12-05, 10:27 AM
#7
Just out of curiosity how come there is no back cutting on the bridge porting? It seems to me that on the back side of the port if it were angled it would allow air to flow smoothly through the port or does it not matter as much on a turbo motor. Very good port work but every bridge I have ever cut was angled both on the bridge and on the backside of the port. Air hates straight edges and it seems to me that the bridge port being cut staight down like that would hurt flow. I know 86+ engines are a bitch to bridge when you are trying not to cut into the water seal lands but it can still be done. Just would like some input on this and I'm not trying to bag on the port work like I said already very good port work.
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08-12-05, 12:15 PM
#10
BDC Motorsports
Originally Posted by RETed
Cause BDC claims it's not necessary...
-Ted
-Ted
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08-12-05, 12:19 PM
#11
BDC Motorsports
Originally Posted by Zero R
That sounds funny coming from someone who pays attention to details.
B
08-12-05, 12:41 PM
#14
BDC Motorsports
Originally Posted by SGPguy
Damn, thats a big bridge. Is that your biggest? i know you have the different "specs" and whatnot. Very nice.
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08-12-05, 09:10 PM
#18
Originally Posted by BDC
I did do it a hair bit but I didn't focus alot of time on it. Of the 30-odd or so BP motors I've ported or built, I've done it moderately to about half of them and I haven't seen a dramatic change when I've done the back-cutting on the short radius of the eyebrow. Maybe the changes I'm looking for I won't notice anyways perhaps by not pushing it to those limits in load or RPM; I have no idea. In any event, I haven't seen any practical effect out of it for alteast what I'm doing. 13btnos, you are technically right that it would have an effect. Maybe one of these days I'll become more convinced that it's beneficial for the types of setups I'm building.
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I try not to post my stuff in others threads out of respect. But I had to put a pic up after you bashed Ted. This got one more dusting. But I dont quite shinethem up to the level you do. I see no need for it. Makes for pretty pictures though
08-12-05, 09:53 PM
#19
Originally Posted by Zero R
But I had to put a pic up after you bashed Ted. This got one more dusting. But I dont quite shinethem up to the level you do. I see no need for it. Makes for pretty pictures though
the original owner backed out halfway through the project so I sold the motor to someone down south. It was a pretty nice build though.
08-12-05, 10:59 PM
#21
BDC Motorsports
Originally Posted by Zero R
I guess, I think it would require a pretty good amount of work to determine the difference it would make. I certainly don't have the time to put into it. I just find it odd coming form you. I've always backcut I never really thought about not doing it.
I try not to post my stuff in others threads out of respect. But I had to put a pic up after you bashed Ted. This got one more dusting. But I dont quite shinethem up to the level you do. I see no need for it. Makes for pretty pictures though
I try not to post my stuff in others threads out of respect. But I had to put a pic up after you bashed Ted. This got one more dusting. But I dont quite shinethem up to the level you do. I see no need for it. Makes for pretty pictures though
By the way, I didn't really bash Ted. I'm just sick of his relentless criticism with just about nothing ever positive or constructive to add. He's already called my bridgeports "laughable" (or atleast made the inference). I don't tolerate his abusive remarks. I respond the way I do with comments such as, "show us your work", because, while I'm actually out there doing this kind of stuff, trying different things and schemes out to see what works, what does, and what the effects are either way, he's basically doing much of nothing at all and, instead, playing the role of an "armchair quarterback". I don't mean to be presumptuous Zero R, but if you were out there working long hours repeatedly, trying your best to increase your skill and expertise at something, sweating yourself to death in the heat and spending your own money to try and build a better "whatever", all the while getting nothing but negative and abusive comments (basically trying to knock you down) from some guy who never, ever, ever contributes anything objective regarding his own hard work and experimentation, then I'd bet you'd be a little ticked off, too.
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08-12-05, 11:09 PM
#22
Lives on the Forum
Originally Posted by BDC
I'm still waiting for you to produce any pictures or results of any of your work, Ted.
As for results of my work, I don't show them cause 1) customers pay for my work, and 2) there is nothing spectacular about them.
-Ted
08-12-05, 11:12 PM
#23
Lives on the Forum
Originally Posted by BDC
By the way, I didn't really bash Ted. I'm just sick of his relentless criticism with just about nothing ever positive or constructive to add. He's already called my bridgeports "laughable" (or atleast made the inference). I don't tolerate his abusive remarks. I respond the way I do with comments such as, "show us your work", because, while I'm actually out there doing this kind of stuff, trying different things and schemes out to see what works, what does, and what the effects are either way, he's basically doing much of nothing at all and, instead, playing the role of an "armchair quarterback". I don't mean to be presumptuous Zero R, but if you were out there working long hours repeatedly, trying your best to increase your skill and expertise at something, sweating yourself to death in the heat and spending your own money to try and build a better "whatever", all the while getting nothing but negative and abusive comments (basically trying to knock you down) from some guy who never, ever, ever contributes anything objective regarding his own hard work and experimentation, then I'd bet you'd be a little ticked off, too.
I knew this was going to happen, and I made my comments as inert as possible.
IF IT WERE ANYONE ELSE WHO REPLIED LIKE THAT, YOU WOULD'VE MOSTLY IGNORED IT, MENTIONED ME, OR NOT REPLY AS SHARP AS YOU HAVE ABOVE.
I didn't *** no criticism, no matter how much you'd like that to happen.
I JUST PASSED ON WHAT YOU BASICALLY TOLD ME.
Is there something I got wrong?
I claimed the back-cutting was important.
You told me your "results" have shown it doesn't matter.
Again I ask, did I miss something in the intepretation?
-Ted
08-13-05, 03:26 PM
#25
Originally Posted by BDC
Hey Zero R, I understand where you're coming from when you say that you "find it odd coming from me". Especially considering the work I put into rounding out and radiusing everthing I possibly can on a standard intake port, I think it would make sense to suggest that I'd atleast give it some consideration when adding the bridgeport cut. I understand the basic principles behind "air taking the path of least resistance" and the effects of turbulent, pressure-drop points. The entire scope and aim of the way I do porting work is built around that. I have done this same kind of "back-cutting" on the short radius of the bridgeport eyebrow cut several times but usually not to any great degree. I've ported or built right around 30 of these half-bridgeport turbo setups to date and have been experimenting with them over the past 2 1/2 years. Even a very lousy and jagged set of cuts (the very first one I did which was about 1.25" long and 1/8" wide, completely perpendicular to the runner) made a surprisingly substantial difference in how the car acted as far as turbo response, torque, and horsepower output. This is the same thing that everyone has reported consistently in their own setups. I am beginning to be of the belief that we are doing way too much on the intake side and not enough on the exhaust side. Even just little, basic bridgeport cuts make a tremendous difference. That's why I am of the opinion that, especially with larger cuts like Crusader's, that they're "good enough" for what his car's goals will be. The same goals have been achieved on much smaller and less efficient cuts. That's why I don't put alot of effort into the back-cutting consistently. I did do a little bit on Crusader's but not a whole lot. When I re-do the ports on my engine, I may do more to see if there's any practical difference, especially at low-end with turbo response. If back-cutting means I gain 30hp but only above 550+rwhp, then I don't personally think it's that humongous of a priority to do. That make sense?B
Originally Posted by BDC
By the way, I didn't really bash Ted. I'm just sick of his relentless criticism with just about nothing ever positive or constructive to add. He's already called my bridgeports "laughable" (or atleast made the inference). I don't tolerate his abusive remarks. I respond the way I do with comments such as, "show us your work", because, while I'm actually out there doing this kind of stuff, trying different things and schemes out to see what works, what does, and what the effects are either way, he's basically doing much of nothing at all and, instead, playing the role of an "armchair quarterback". I don't mean to be presumptuous Zero R, but if you were out there working long hours repeatedly, trying your best to increase your skill and expertise at something, sweating yourself to death in the heat and spending your own money to try and build a better "whatever", all the while getting nothing but negative and abusive comments (basically trying to knock you down) from some guy who never, ever, ever contributes anything objective regarding his own hard work and experimentation, then I'd bet you'd be a little ticked off, too.
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