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MG TD TF 1500 - T Series Duel Exhaust

On Ebay.




Paul161

Doesn't strike me as having been designed to be effective. Bud
Bud Krueger

Paul -- That's what I have on my TF. It was one of the few positive surprises I found when the TF arrived from being shipped from Georgia. The wife of the PO didn't mention, or might not have known, that it had dual exhaust. I had a header shop run two exhaust pipes into a single muffler and then two pipes exiting out the back of the muffler in parallel next to each other on the right side of the TF.
John Brickell

Should have posted this in my first message, but if you want to see this dual exhaust system in place go to my blog:

mgtf54.blogspot.com

over on the right of the title page you will see a series of dates, go to "2011", then go down to "February" then click on "Dual Exhaust and Muffler System Installed" and that will take you to the section of my blog that shows the installation of a dual exhaust system.
John Brickell

There were three makers of these dual exhausts for XPAG engines - Solt, Douglass and Huth (plenty of write-ups in the archives). They sell for a few hundred dollars, NOT the $1400+ one seller asks!

I have a SOLT I want to sell, if anyone is interested. $400.

Tom Lange
MGT Repair

t lange

Looks as if I shoved my foot into my mouth. Tom, does this system have any significant effect? There doesn't seem to be any design toward better scavenging. Bud
Bud Krueger

Bud - Feel free to remove foot. I think ANYTHING with dual exhausts breathes better than a single, but I really can't say that this one improves things a whole lot. I do k now that owners who have these on their cars get a lot of attention at car shows!

Tom Lange
MGT Repair
t lange

You do NOT want to run dual pipes from head to tail. On an inline 6, yes. Not on an inline 4. It's possible that on a built-up XPAG, having dual headers into a single pipe will help exhaust faster and therefore make a little more HP, but I have my doubts about any improvements on a stock system. I'd say the biggest drawback is the very limited space you have to stuff two pipes into! What I like best about the Huth, etc manifolds is the "period aftermarket part cool factor". Good conversation piece when you lift the bonnet.
Steve Simmons

I've seen a couple of these, and here's a pic of one on a TF in the Rockburn area. My only concern is that when it comes time to replace the pipes, where can they be obtained?

As for the difference between dual pipes on a 4 or 6 cyl engine; Lotus did a lot of work on this in the 60s. It all boils down to scavenging. It seems that in-line engines don't benefit from dual exhausts (Tell this to Jaguar. They had them on 6-cyl E-Types for years).

The real benefit comes on V-type engines, including the V4. Saab had dual pipes on their V4 (Ford)-engined Sonnett; and of course duals on V6s and V8s are legendary.

On the V configurations, unless you fit a balance pipe, expect to get complementary harmonics in the system and that will produce a noticeable drumming at certain points in the rev-band.

Gord Clark
Rockburn, Qué.




Gord Clark

It's difficult to determine the value without some actual flow testing. I suspect they could provide some benefit over the stock manifold but I believe that would be best accomplished if the dual pipes were joined back together after they have made the bend at the bottom and the run a single pipe from that point. Just speculation on my part based on observations of the stock MGB exhaust which is generally recognized as fairly efficient on stock revving engines.


MG LaVerne

This thread was discussed between 12/08/2015 and 14/08/2015

MG TD TF 1500 index

This thread is from the archive. The Live MG TD TF 1500 BBS is active now.