426Cuda
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- Joined
- Dec 15, 2013
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- VF Redline Sedan - A6 Spitfire MSE...
Yep, you guessed it. It's an exhaust question.
The engine oil cooler on my MSE has forced my hand. I won' be using the HSV 340 tri-y shorties I have.
So the Q's are:
1. Long 4-2-1 or 4-1???
2. Primary pipe diameter 1" 3/4 or 1" 7/8? (It may only be about 3mm difference, but it's girth lads! Oh, and I already said I was going long.).
I've read up on the pros and cons and best applications of all three designs from the experts. Also diameter. I thought I knew a bit about headers? I was right. But only a bit. I learned some really interesting stuff. Fun maths too haha. It even helped put some of @monstar 's nutty professor ramblings into perspective.
So, this is the cross road I'm at.
I've read up on the theory, as I'm no expert, so I got it from the experts. I'm deciding between 1" 3/4 4-1's and 1" 3/4 long 4-2-1's.
I'm not trying to start a war here. I know the two brands I'm leaning towards. I'm interested to hear from anyone whom has tried both on a VE or VF or VF2?
Seat of the pants dyno stuff. Dyno results if available. Sound. Clearance Clarence. Bottom end tourqe. Mid range. Top end. So on.
If my learnings from the theory are correct I'm thinking there'll be a bees dick between them on paper. The long 4-2-1's will have marginally better bottom end and mid. 4-1's will start a little later, then possibly dip a bit, and be marginally better up high. The 4-1's will sound better.
The major thing I want to know is how the 4-1's perform down low compared to the long
4-2-1',s in our cars.
Any practical knowledge would be appreciated.
Cheers!
The engine oil cooler on my MSE has forced my hand. I won' be using the HSV 340 tri-y shorties I have.
So the Q's are:
1. Long 4-2-1 or 4-1???
2. Primary pipe diameter 1" 3/4 or 1" 7/8? (It may only be about 3mm difference, but it's girth lads! Oh, and I already said I was going long.).
I've read up on the pros and cons and best applications of all three designs from the experts. Also diameter. I thought I knew a bit about headers? I was right. But only a bit. I learned some really interesting stuff. Fun maths too haha. It even helped put some of @monstar 's nutty professor ramblings into perspective.
So, this is the cross road I'm at.
I've read up on the theory, as I'm no expert, so I got it from the experts. I'm deciding between 1" 3/4 4-1's and 1" 3/4 long 4-2-1's.
I'm not trying to start a war here. I know the two brands I'm leaning towards. I'm interested to hear from anyone whom has tried both on a VE or VF or VF2?
Seat of the pants dyno stuff. Dyno results if available. Sound. Clearance Clarence. Bottom end tourqe. Mid range. Top end. So on.
If my learnings from the theory are correct I'm thinking there'll be a bees dick between them on paper. The long 4-2-1's will have marginally better bottom end and mid. 4-1's will start a little later, then possibly dip a bit, and be marginally better up high. The 4-1's will sound better.
The major thing I want to know is how the 4-1's perform down low compared to the long
4-2-1',s in our cars.
Any practical knowledge would be appreciated.
Cheers!
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