Straight piped lambo!!! Check it out:)

repost

 

That is nice and all...however..I when just "straight" pipes are added..you not only actually loose power in your car, but you are on a path of ir-reversable damage to your valves and other items internal to your car..sounds great, but has no effect for performance.

 

I have never, ever heard this, ever. On what basis is this true?

 

Straight pipes as in no CAT's at all?

 

that is correct, the loss of balanced pressure will do all kinds of damage..

EVEN the factory OEM SE30 and Diablo GT, sent out with out cats and mufflers have back pressure flaos incorperated with them.

 

you not only actually loose power in your car, but you are on a path of ir-reversable damage to your valves and other items internal to your car..sounds great, but has no effect for performance.[/QUOTE]


Some of what Roy says is correct, but for the most part, the rest of it is a bunch of CRAP.
Straight pipe will NOT bend valves or other things.

Having been an engine builder/racer for over 55 years, I can tell you from doing it, that statements like that, for the most part are just that, CRAP.

If straight pipes caused problems like that, then every IMSA, NASCAR, NHRA, IHRA, AMA racer would have bent valves and damaged engines. Also every piston engine plane would have bent valves and a damaged engine. Anybody ever seen a P51 Mustang with mufflers or maybe a B29, I didn't think so.

The part of what Roy says that has some truth, is loss of power. BUT ONLY if the system is not tuned to the engine. Racers that know what they are doing, spend lots of time tuning the exhaust to the engine and the car and the track.

BUT running a car on the street with straight pipes will NOT cause bent valves or damage the engine. Well, that is if the owner does not get carried away and blow the engine up.

Chadbourn Bolles

 

Some of what Roy says is correct, but for the most part, the rest of it is a bunch of CRAP.
Straight pipe will NOT bend valves or other things.

Having been an engine builder/racer for over 55 years, I can tell you from doing it, that statements like that, for the most part are just that, CRAP.

If straight pipes caused problems like that, then every IMSA, NASCAR, NHRA, IHRA, AMA racer would have bent valves and damaged engines. Also every piston engine plane would have bent valves and a damaged engine. Anybody ever seen a P51 Mustang with mufflers or maybe a B29, I didn't think so.

The part of what Roy says that has some truth, is loss of power. BUT ONLY if the system is not tuned to the engine. Racers that know what they are doing, spend lots of time tuning the exhaust to the engine and the car and the track.

BUT running a car on the street with straight pipes will NOT cause bent valves or damage the engine. Well, that is if the owner does not get carried away and blow the engine up.

Chadbourn Bolles[/QUOTE]


Hi Chad,
I agree with you and know you are an experienced engine builder. But I have heard something that might make Roy a little bit right. Like you said, everything has to be designed and tuned together. And race car, plane, and other engines with heads designed for straight pipes are probably just fine, but I have heard that engines that are not designed to have straight pipes can have the following problem: After hard running with all engine components at top temperature, a rapid shut down of the hot engine can cause bent exhaust valve stems because the much colder atmospheric air can have immediate and direct contact with exposed exhaust valve stems (those cylinders where the exhaust value is open when the engine stops rotating), and the relatively very cold air can cause too rapid and irregular cooling of the metal that sometimes can cause them to distort. So, I think that is what Roy is talking about, and I have heard it too. Having said that, I have tracked an LP400 with straight pipes turning up to 9000 rpm and have never had a bent valve. Maybe because there is a relatively long tube of steel to warm the atmospheric air before it hits the valve stem, and probably because I always let the car cool off at normal rpms before shutting it off.

 

Dear Lamborghinisti,

Some of what Roy says is correct, but for the most part, the rest of it is a bunch of CRAP.
Straight pipe will NOT bend valves or other things.

Having been an engine builder/racer for over 55 years, I can tell you from doing it, that statements like that, for the most part are just that, CRAP.

If straight pipes caused problems like that, then every IMSA, NASCAR, NHRA, IHRA, AMA racer would have bent valves and damaged engines. Also every piston engine plane would have bent valves and a damaged engine. Anybody ever seen a P51 Mustang with mufflers or maybe a B29, I didn't think so.

The part of what Roy says that has some truth, is loss of power. BUT ONLY if the system is not tuned to the engine. Racers that know what they are doing, spend lots of time tuning the exhaust to the engine and the car and the track.

BUT running a car on the street with straight pipes will NOT cause bent valves or damage the engine. Well, that is if the owner does not get carried away and blow the engine up.

Chadbourn Bolles[/QUOTE]


....interesting way with words... :/

+1

This is EXACTLY what I've heard.....

By George Evans !


Shamile

Freeze...Miami Vice!

 

I notice that people keep saying "I HAVE HEARD", I HAVE HEARD, I HAVE HEARD.
BUT I don't see anyone saying I have scientific evidence. Until some of the I HAVE HEARD people come up with proof, then again I say it is a line of CRAP. No bent valves or major engine damage from running straight pipes.

Take for instance a supercharged fuel dragster, STRAIGHT PIPES, and SUPER heat. It runs for 1/4 mile and shuts off, towed back to the pits, what do you know, NO BENT valves. I be darn, I am sure I HEARD SOMEWHERE that running straight pipes will result in bent valves, and engine damage, I guess what I HEARD was CRAP.

Then again, I sell mufflers that cost $2000.00-$8000.00 and if I can convince you that running your car without those mufflers, you will damage your engine, well guess what story I am going to tell you.

Come on people, use your head and brain for something beside a hat rack. I know you are smarter than that, to fall for that line.

You want to see a car run with straight pipes, GOOGLE my name: Chadbourn Bolles, you will see and ride with me in my 95 Jag V12 with straight pipes. By the way it was faster in the standing mile than the Lambo Murcielago. Not bad for a 4200 lb 450 HP Jag.

I can site case after case about engines of different designs running straight pipes with no damage or bent valves.

Like I said already, I am selling mufflers and they will keep you from engine damage and bent valves, so you know the story I am going to tell you, you guessed it.
It is surprising how easy it is to get people to believe stories like that. Well it does sell mufflers systems.

Chadbourn Bolles

 

Dear Lamborghinisti,

Chad, I think what everyone is trying to say is that a car...like my Diablo was designed to run with the exhaust. When I replaced my headers, George told me not to run the engine until I had at least the primary cats on or I could distort a valve with the cold air after shut down.

For the high performance engines you design....you designed them to run open from the start.

I don't think anyone here is questioning your expertise....certainly not me.


Shamile

Freeze...Miami Vice !

 

I dont sell mufflers...just so every one knows LOL LOL

 

My experience building engines my father and I always started our rebuilt engines without exhaust not even the headers connected. One time I remember a guy I was selling an engine too when I was 16, 20 years ago, he didn't didn't want me to run the engine too long because he was worried it could hurt the exhaust valve. I asked my dad about it and he commented it was kind of some old time myth.

We never had an issue even with no headers attached. With any type of exhaust even a straight pipe attached air is not just flowing freely to the exhaust valve you have a so much heat still in the steel exhaust pipes the valves are not being hit with cool air anyway.

 

I've been around a long time too....and have also heard the myth about cold air causing distortion, but not to the valve itself, but only the valve stem. Maybe somebody should do a quick experiment. Take a valve that is straight and true, heat it up good and hot, then subject it to cool air from one direction...then see if the valve is still straight and true? It is theoretically plausible that distortion could occur, but it may be so slight that it's not a concern. We do know that heat can distort metal panels, etc. So maybe a sudden uneven cooling can really distort valve stems?

If George Evans said that distortion is a possibility...I'm inclined to believe it....

 

How about we all agree to disagree...I am really, it comes down to it is your car do what you want with it..no skin off of my nose..

But I can tell you this from experaince..

1) A car with mods, of any kind, almost ALWAYS will have less value at resale time then an OEM stock car.

2) A lot of money is spent on R and D to get the car to perfrm correctly for the street..I sure as heck dont have the funds, nor the knowledge to re-invent what seems to wrok just fine.

"if it ain't broke..dont F**K with it"

 

As a question to add to this... if based on cool air distorting valves, wouldn't freer flowing cold air intakes do the same? We have ram air for engines that cram cold air which has denser oxygen content for greater burn, wouldnt that distort valves? I figured throw this out there and let the public decide... Especially when the theory is that what goes out can distort the valves, what about what goes in?

 

The intake valve stem is not subjected to the hot air gasses of the exhaust valve that is where the believe the exhaust valve can be damaged comes from. People who run Nitrous inject a really cool stream of air into the intake.

 

The point I am trying to make is just this. People for the most part are SOOOOOOOO
GULLIBLE, that they will believe just about anything, especially when they hear it from a supposed expert on the car. It is so much easier to sell expensive parts to those people.
Installing cats first or maybe you will bend a valve, another crock of CRAP. Considering the FACT that the engine in your car NEVER had cats on it in europe and there were no problems.

There were people in HI School that believed french kissing a girl might get her pregnant.

Also all the engines I build, came from the factory with mufflers to start life. I do not know of an automotive engine that was designed from the start to run with mufflers or it would be damaged, if run with straight pipes.

Chadbourn Bolles


Chad, I think what everyone is trying to say is that a car...like my Diablo was designed to run with the exhaust. When I replaced my headers, George told me not to run the engine until I had at least the primary cats on or I could distort a valve with the cold air after shut down.

For the high performance engines you design....you designed them to run open from the start.

I don't think anyone here is questioning your expertise....certainly not me.


Shamile

Freeze...Miami Vice ![/QUOTE]

 

How lame! 800 HP for what, revving in a garage while hiding yourself in a self promoting video?

Jimmy, is that you?

 

And here I figured you were going to be The Next Walter Wolf!