[Joel5.0]

Originally Posted by Portmaster

1. His exhaust being to large slows the flow of exhaust through the headers thus reducing the scavange effect at the collector. His 3 inch exhaust from his big long tubes back only help one the engine reaches full flow. The E7's will never realize either.

You have 4 cylinders pulsing exhaust pressure/header, once each pulse gets timed at the header collector through primaries length/ID, overlap, collector shape and length, etc, etc....you want that refuse out of there ASAP. Now.... how does an increase of 44% in the cross section area of the exhaust (2.5" vs 3") will slow the flow down where it counts? Specially after receiving 3 additional pulses that will cause the leading mass of exhaust refuse to accelerate through the exhaust pipe?

The so called velocity is important at the header collector/extension location, and it is a pulse tuning exercise to impart a vacuum pulse to the other cylinder within that bank going through the overlap (aka scavenge). IOW.... Cyl. #3 exhaust pulse will help scavenge #1, #2 wil do #3, #4 will help #3 and #1 will aid #4 ...... once that scavenging pulse is used, exhaust flow (not velocity) takes the center stage.... you don't want that refuse hanging around that long. Besides, if you try to increase velocity using the typical Bernoulli techniques (narrowing a section of the exhaust), wouldn't it have an effect in back pressure?.... which is a for the Otto cycle engine?

Originally Posted by Portmaster

2. You can no more tune a car with E7's to work at an optimal level with too large exhaust anymore that you could with to large a Carb. There IS a point of no return when going large

Yep..... but that is not a 3" full exhaust system, or a 750 cfm Holley.

Originally Posted by Portmaster

3. Who runs open headers on their street car?

Legally?.... nobody. The point is that the open headers condition IS the condition to duplicate using a full closed/quieter exhaust system once the header collector/extension details are defined/tuned.

Originally Posted by Portmaster

4.Did I ever say he should choke the exhaust? NO. Nothing like that was ever said. Sorry your word play doesnt fly. Yes it would be great if he could do an intake/Head and Cam Combo to match his exhaust. I don't deal in what if's just the problem at hand . A set of smaller headers are as low as 99 dollars.

Word for word?..... nope, but why spend money in decreasing the exhaust flow capacity by 44%? Why not use that capacity and concentrate on improving the intake? Isn't that what "hot rodding" and performance building (including street setups) is all about? Can he still use that 3" ID exhaust with E7 heads over a 2.5" system?.... yep... so why decrease its flow? BTW.... decreasing flow = choking, it's not word play..... simply a synonym.

Originally Posted by Portmaster

5. Yes thats what I said.It make about as much sence as your theory. There are differant levels of wrong. Both of these were on about level 8

.....I can understand that......when a person has not done what is tried to be explained here, its obvious. I guess a 100% streetable setup on a 4 cylinder import with dual side draft Weber carburetors and full 2.5" exhaust system doesn't make sense either. When the only approach followed is the "big block" approach, that is understood..... why?, there's one of my quotes missing from that list..... "When all you have is a hammer, everything looks like a nail"

Originally Posted by Portmaster

This has nothing to do with the Membership, It's all about you and your burning desire for anyone to challange your allmighty attitude. You quote yourself which I find halarious because you are so full of yourself. You have to have your own code printed into your signature line just so people have to decode that techno babble Bullchit. You are so full of yourself it's pathetic. You are a smart guy and won't argue with that but you slip up and not many people catch it because you talk over their head. I see right though you.
Sorry my strightforward, blunt and simple style threatens you so much you have to throw your techno babble BS style challange into the mix. Ask a real question, get a real answer. Thats my style, Deal with it.

"Allmighty" attitude?..... moi?.... yep.... asking for explanations on topics that go against simple physics and Engine 101 concepts is an "allmighty" attitude. Members here don't have the right to UNDERSTAND the concepts, they only need to accept them because you say so, no explanations required, they are over their heads, so why provide them?...... and I am the one tagged with the "allmighty" attitude? A "straightforward, blunt and simple style" DOES NOT mean an automatic exception from providing explanations of whatever it is you are "suggesting"..... or is the use of "techno babble BS" an excuse to not engage in a little tech debate of the misinformation provided?

Yep.... other than FOCUSING on the discussion and questions, lets focus on the trivialities of a signature, since the tech inquiries are way above one person's abilities to explain them, let's draw the attention to something that is not related to the discussion at hand....... fine, here's a few I also use... "If you can't explain it simply, you don't understand it well enough. (Albert Einstein)" and "I can explain it for you, but I can't understand it for you. (90lxcoupe)"

Yep... I only come here to provide misinformation that will cause others to waste money downgrading components they already have, I don't do a thing to try to help fellow enthusiasts to solve problems with their rides either.... and God forbid I encourage any type of discussion regarding a specific topic, nobody has the right to understand why they should or shouldn't perform some modifications, and if you do, expect the "allmighty" tag?...... ..... BTW, since my signature is such a problem, would the one shown below be more appropriate?

Do you know how you can spot/pinpoint/ID bullsh!t?.......... here are some catch phrases or descriptions to look for:

Torque Down Low
Velocity
Tip In
A 750 cfm Holley is too big of a carburetor
A 75mm TB is too big for an EFI N/A setup
SP intakes are only good for 7000 rpm setups
A long runner EFI intake is the only alternative for a DD setup
Rod to stroke ratio and side loading
A set of cylinder heads that peak flow at .500" lift require a .500" lift cam
Solid roller setups area a for streetable setups
Anything bigger than a 2.5" ID exhaust will cause losses in power, specially in "torque down low"

Or would it be too ""straightforward, blunt and simple"? ......... it is a signature used by someone else.