Tag Archives: new frame

Final Pics of the New TR6 Frame

Here is a final set of pictures of the new frame serving as bowtie6’s backbone.  The body has now been permanently bolted on, so this is the last set…

Some misconceptions have surfaced as to the origin of this frame.  Suffice to say this is NOT (repeat, IT IS NOT) a RATCO frame.  Those folks produce a nice aftermarket frame but this one is all bespoke and designed for the ECOTEC and the solid rear axle specifically.

Why so many entries on this blog about the frame?  Well, simply put:  I am very proud of it.  My cousin Jim Thompson has put together a very clever, lightweight and strong frame using modern frame-building techniques and materials while being able to retain some of the original TR6 bits.

The front suspension is almost all stock TR6.  The “A” arms, ball joins, steering rack, sway bar, trunions, hubs and rotors are all stock Triumph.  The calipers are Wilwood.  The springs/shocks have been replaced with coilovers.  The coilovers offer several advantages:  no spring compressors, spring interchangeability and the ability to control ride height.  However, they are not cheap but worth every penny.

The rear is all new and it is trick!  The axle is an 8” Ford, custom sized.  It was cut on both sides and custom cut axles have been sourced from Moser.  The gears are from Motive; posi-traction (of course) with a 3.80 to 1 ratio.  Disc rotors and calipers are used on the rear end (with full emergency brake capability using the original TR6 cables and lever), as well as matching coilovers.  There is a four point suspension holding the axle in place with Heim ends on all four control arms.  We tried polyurethane ends, but they did not survive the power from the ECOTEC.  Enter the Heim ends.  Again, only the best have been purchased.  These are precision ground steel (normally used on sprint cars) along with special boots to keep debris out.  Brake and fuel lines are all hand made, hand fitted and hand formed from stainless tubing; with teflon lined, braided lines going to all four calipers.  Again, only the best has been sourced.

This is the second frame built using this design.  The first frame is under Jim’s TR4 and it has proven to be astounding.  It is very stiff – gone is the ‘flex’ that the original frame exhibits.  The new frame is made from much stronger square tubing.  This tubing is a solid square, not a “U” channel with a cap spot-welded as in the original design from Triumph.  I repeat, this is very strong stuff.

Finally, the ECOTEC 2.4 litre engine sits on special plates (on the frame side) that allow the use of the original Solstice engine mounts as well as tranny mount.  The mounts are really nice because they are made with rubber to help isolate vibrations.  Furthermore, the GM mounts have a locking mechanism that if the rubber ever fails the engine will only rock a very small distance and the locks keep it from making undesirable and expensive damage.

Finally some thoughts:

  • I realize this frame has nothing in common with the ‘original’ frame.  My condolence to the purists – but the idea is performance and this frame works and works very well.
  • I’ve read where folks discuss the shortcomings of the AISIN gearbox and say the gearing is all wrong.  Depends what you want to do:  bowtie6 is not built as a drag car.  Yes, first gear is a bit tall and that might not sit well with folks.  I don’t mind it.  From the experience gained from my prior setup and my cousin’s TR4, the car excels like a dream in second, third and fourth.  These three gears are quite simply awesome.  What about fifth?  Well, suffice to say that at speed and in fifth gear all you have to do is punch it and the car will take off.
  • The last thing about the new frame has come as a bit of a surprise to me.  In my cousin’s TR4 the steering “effort” has been reduced significantly.  The “far-back” engine placement has something to do with this.  But there is also the extra pressure of the original spring pushing on the “A” arms that has been deleted.  The new “feel” is much more positive, lightning-quick and a delight to use at parking-lot-speeds.

Here is the final picture gallery of the frame prior to the body being permanently installed.



Today was  a milestone.

bowtie6 had a trial fit of body, new frame and ECOTEC engine.  The following pictures show what this all looks like.

Yes, there has been some “shaping” done to the body.  The area past the firewall was in need of change to make room for the oil filter (on the driver’s side) and the thermostat housing (on the passenger’s side).  For anyone thinking about doing this to a “stock” TR6:  beware.  There will be some work required on the firewall as well as the battery box tray on the stock TR6.  Since bowtie6’s firewall had already been modified, this was a small change.  Under the experts hands of my cousin Jim Thompson, there was some welding involved and voilà – the engine fits.

Once all that work was completed, I mixed up some of DuPont ChomaOne single stage urethane red paint and the bare areas were re-painted.  This took some doing but the result is awesome.  Tonight the new areas are drying and the plan is to bolt the new frame to the body permanently tomorrow.

Well… Here is what an ECOTEC looks like in a TR6 with a custom frame underneath it.  Note how far back the new engine sits.  This change is highly desirable in moving the weight back.  This is indeed a great day!


bowtie6’s New Frame – Check It!

The new custom frame is done.

After much anticipation, the new custom frame is finished.  It has taken a lot of work by my cousin Jim and I could not be happier.  There are plenty of pictures – they are at the bottom of today’s entry in a gallery, but first here is what we have:

The frame looks different from the original setup.  This was done for several reasons, but mainly for strength.  The next was the ability to mount the rear solid axle.  One of the main concerns I always had in the back of my mind was whether the hubs/halfshafts would fail.  This time, the new axle will handle all the power on tap with no reservations.  This time, the diff is posi-traction with a 3.80 to 1 ratio.

The rear calipers I had on the old frame have been adapted to work with the new axle.  As you will see, the front calipers are the same Wilwood’s from the original build.  The original mounts were retained.  All brake lines going to the calipers are the ones used in the past build – braided teflon lined.  And, there is also a picture below showing the location of the Wilwood proportioning valve.  All brake lines have been scratch made from stainless tubing fitted by hand.  They look killer!

Coilovers have been used on all four corners.  This part took a bit of research and the spring rates took some careful consideration.  These are the same settings used on my cousin Jim’s TR4.  Not only do they look awesome but they perform equally well.  They are quite pricey but just the fact there will not be any more spring compressors involved makes it worth the trouble.

The ECOTEC 2.4 engine is now mounted using the original Solstice mounts.  Special pads were made to go on the frame and this is where the mounts anchor.  Ditto for the transmission mount.  This is all done with a very specific purpose:  to make room for the exhaust and have nothing ‘hanging’ below the frame.

There is a ton of more subtle details – I am sure you will find them.  If you have any questions/comments drop me a line.  Here is the new frame gallery.  Enjoy!

Painted Frame

It is done.  Took a few hours of work but the new frame is now fully painted.  I used a nice chassis black paint – should be nice and durable.  The stuff was not too terribly expensive so I shot a generous amount and now it is only a matter of time for it to fully dry.

Here are a couple of pictures – I had more but they just did not turn out nice enough to post.  I’ll have more next time…

Here is the rear section of the frame.  These are the rear towers that will hold the coilovers.  The axle sits ahead of this, over the frame.  The uprights brace should tie all this together nicely – the idea here is not to have any flexing going on.

Next is another shot of rear section of the frame.  The tower braces show the tabs where the coilovers will mount and also on the lower side, the ties for the control arms that will hold the rear axle in place.

Finally, the midsection.  This is where the transmission will rest.  The square sections off the frame will be used to hold the body in place.

I’ll have more pictures of the front suspensions next time…



A New Frame Ready for Paint

I’m chomping at the bit…  bowtie6‘s new frame is complete and ready for paint.  It is stunning.  Sorry – no pictures today but there will be plenty tomorrow.

I saw the frame yesterday and it is very impressive.  My cousin Jim took the frame to the fellow that does the media blasting for us and had the thing cleaned up.  The frame is now back at the shop, gray as can be and just begging for primer and paint.

Tomorrow should be a fun day:  I’ve got primer, a gallon of chassis-black (with the matching hardener) and my HVLP guns locked and loaded.  The goal is that by EOD tomorrow, the new frame should be thoroughly coated with paint and looking like a supermodel wearing a little black dress.

Another tasty morsels:

  • The new differential for the rear axle has been ordered and has arrived!  It was far from cheap, but it is the best money can buy  What ratio?  3.80 to 1, full posi-traction.  This thing rocks.  There will be more about this soon…
  • New bushings for the front suspension have been ordered from the UK.  The new ones are of much greater quality and more durable than the polyurethane bushes currently used.  Why?  After only 15,000 miles the ones I had bought have become ‘worn’.  Not good.
  • Adjustments to the steering column.  Ready for this?  bowtie6 will have full tilt steering.  Yes.  Tilt steering!!  Should be a nice addition – I’ll have more on this too!

Stay tuned…