TR6 TR6 "Tuned" Exhaust Header

[erstearns]

TR6 "Tuned" Exhaust Header

Seem to be fairly confused as to what particular header is appropriate for an essentially stock engine. Have discerned much difference as to style, 6-3-1 etc. and the necessary length of primary, secondary etc.

The stainless route seems to direct one to Falcon, Phoenix or Double D etc.

On other forums have found much discussion regarding resonnance, RPM etc and the effect that improper construction can detune the engine. Unfortunately, way over my head and no real direction.

Can anyone add comment from experience, or, point to previous threads where exhaustively debated?

Thanks in advance.

BTW, picked up the project TR2 last weekend and look forward to providing details as the restoration adventure unfolds. :banana:

 

[Flinkly]

Re: TR6 "Tuned" Exhaust Header

if you want to learn or do it yourself...

https://headerdesign.com/

it actually is a great sight and explains headers as far as you care to read. even has software to design your own given information from your engine and preference for where you want power. for people still making a living (...not retired with too much time on hands) it would probably be best to find a local exhaust shop that actually knows what they are doing.

as far as threads to read here, there probably is. wait for one of the tr6 guys to come along...

 

[Brosky]

Re: TR6 "Tuned" Exhaust Header

Probably the stock late manifold is as good as anything for a stock engine.

I use a JetHot coated Inside and out) PaceSetter header that everyone dislikes except for me and the other people who actually have them, but that's another story.

For stock, stay with the stock later manifold and twin pipes gong back and you'll be fine.

 

[swift6]

Re: TR6 "Tuned" Exhaust Header



For stock engines, the late manifolds are just fine. Adding a header to a stock engine will increase the decibels out of the tail pipe and increase the under bonnet (hood) temperatures. Typically, it will not increase power, though the increased decibels may make it sound more powerful.

The consistent problems with the Pacesetters that I have heard about is the fit. They don't always bolt straight on without some form of modification. Paul has had no such issues. It seemed to have either been a "once upon a time" problem or only about a 50% issue.

Other than the 6-3-1, 6-3-2 arguments, there is also a short primary vs. long primary discussion that rarely is heard. The header that Moss sells has shorter primaries than the unit that TRF sells .

The shorter primaries tend to keep the torque curve down low in the rev range where it will benefit more for a street driven car. The long tubes tend to move that torque curve up the rpm scale a bit. However, on a stock engine, the shift would likely be so subtle that you wouldn't even notice it.

 

[SpitBang]

Re: TR6 "Tuned" Exhaust Header

I don't know is you have seen this thread or if it easier to understand, but it may be of some interest to you, Exhaust Tuning Theory and System Design

 

[Brosky]

Re: TR6 "Tuned" Exhaust Header

<div class="ubbcode-block"><div class="ubbcode-header">Quote:]The consistent problems with the Pacesetters that I have heard about is the fit. They don't always bolt straight on without some form of modification. Paul has had no such issues. It seemed to have either been a "once upon a time" problem or only about a 50% issue.[/QUOTE]

Shawn is correct in that I had to grind about 1/8" off of the two front flanges to fit with the stock intake.

BUT, I also had to grind the Goodparts manifolds in four spots to fit with the header (but it would have been the same for the stock exhaust manifold).

So I really don't count a simple mod like that as being an issue, since anything not OEM will probably need some tweaking. It's not like these cars are an ongoing R&D project anymore.

I'll probably spend more time making the stainless hoses all fit nicely as I did for the manifold and headers.

 

[swift6]

Re: TR6 "Tuned" Exhaust Header

Shawn is correct in that I had to grind about 1/8" off of the two front flanges to fit with the stock intake.

BUT, I also had to grind the Goodparts manifolds in four spots to fit with the header (but it would have been the same for the stock exhaust manifold).

While my header and Goodparts manifold bolted right on with zero modifications and zero problems.

Its sometimes hard to tell if things will work easily or with a bit of modification.

FWIW Paul, I agree, your amount of modification was minimal.

 

[Brosky]

Re: TR6 "Tuned" Exhaust Header

<div class="ubbcode-block"><div class="ubbcode-header">Quote:]While my header and Goodparts manifold bolted right on with zero modifications and zero problems. grin
[/QUOTE]

Yeah, right Shawn.

The next thing that you'll be telling me is that there is no Santa Claus and that MG's were really British Leyland's favorite car.

 

[swift6]

Re: TR6 "Tuned" Exhaust Header

I was actually going to start soft, clearing up that whole easter bunny confusion, before we moved onto the heavy hitters. :wink: