bowtie6 and ECOTEC vs 3.4L V6

I put some 15,000 trouble free miles on bowtie6 powered by the V6 conversion we did several years ago.  The car performed flawlessly, surpassed my expectations and not once was it ever a disappointment.  Not even from the start, on the contrary:  from day-one I have been very proud of my car.

Not wanting to keep the engine ‘stock’, I started doing some research into performance improvements.  Don’t take me wrong, the engine had plenty of power and torque but I just wondered “what if?”  After all, what fun is there in leaving things alone?

This is no “mid-life” attempt to produce a firebreathing monster – if that were my wish then I would be building something else altogether.  I have the ability and resources to do it, but I decided to take a well preserved TR6 and improve it.  It has been a very fun project that I plan to continue to work on and improve.

bowtie6‘s 3.4 V6 came from a ’95 Camaro so out of the box it is a few years old.  I had it dynoe’d the first time and it produced 150hp at the rear wheels.  Not bad for a ‘stock’ V6 with fifty-some thousand miles on it.  I could have left it there and just driven the thing forever putzing around town like an old fart, but that would be no fun at all.  I had proven the concept was sound:  I had an extremely reliable TR6 that did not leak, had no “issue” to speak of and in which I could drive anywhere, anytime with no second thoughts and no assortment of spare parts in the trunk.

Modifications started with a hot cam and roller rockers.  I already had headers so we modified the intake in order to let the engine breathe as well as it let exhaust gases exit.  The car went to the dyno again, this time producing roughly 170hp at the rear wheels.  Then, we found a brand new set of heads which I had ported, polished and flowed.  I also ported the upper intake manifold and bolted an LT1 throttle body.  It was expensive but I wanted to break the 200hp mark.  Along with the ported heads came an adjustable fuel pressure regulator that helped fine tune the already larger injectors.

Third time to the dyno:  this time we produced slightly above the 200hp at the wheels mark.  I had achieved what I set my goals for.  The difference was indeed palpable and made for an even more fun TR6.  However, this proved to be too much for the tired factory Triumph frame made of 10 gauge materials.  This resulted in a frame failure (which I have discussed previously) and forced a review of the foundation beneath bowtie6.

I did not want to ditch the car because I have quite an investment in it.  The frame was un-repairable so we made the decision to make a new frame.  My cousin Jim’s TR4 was nearing completion with a similar frame.  Soon after I had a chance to drive it and see what a new frame and ECOTEC power would be like we had more data to allow a good decision to be made.

So what was it like?  No, it did not “blow the doors off” my V6 powered TR6.  Jim’s TR4 is lighter than my TR6 giving it an edge.  The ECOTEC is a fantastic engine and has way too many advantages over the V6, even with all the improvements we made.  For starters the ECOTEC is lighter and incorporates much more modern features.  The engine has a huge rev range and offers fully tunable ECM vs the opposite for the V6.  Power wise my fully tweaked V6 is matched by the stock 2.4 ECOTEC.

Back to the frame.  Again.  At first, I had a notion to use the V6 in the new frame.  Add that to a solid rear axle with positraction and a robust frame and I would have been in business back on the road.  But no.  The V6 had reached the end of what I could do with it.  Furthermore, I found an ECOTEC with only 4 miles on it (I’ve written about this here before) so using that over the V6 was a mute point.  There is no compelling reason to go with the V6.  Also, supply of V6’s in junkyards getting smaller yet I am told new crate V6’s can be had for $1980 delivered to my house.  Point taken.  Then again, I have $2000 in a 4 mile 2.4 ECOTEC and that includes a 4 mile AISIN five speed gearbox (last time I checked, crate engines don’t come with gearboxes).  I also own a 2.2 ECOTEC that I paid $500 for and will be in my next project.  Truth be known, Jim’s car was initially powered by  a 2.2 ECOTEC but we realized the 2.4 would be a better choice.  So no matter how you slice it, the ECOTEC proved to be my best choice.

Very soon I’ll have bowtie6 back on the road.  It has evolved through the years.  It has been featured in magazines, won awards and I have received a huge amount of compliments which I am very grateful for and I graciously accept. has been hit from every state of the Union as well as from many countries around the world which shows me there are some folks that find this collection of words somewhat entertaining.  Along with the good, I have also had many negative comments ranging from “why did you do it?”, “it is ugly”, “it is not original”, to “your car is a complete abomination”.  I am very grateful for those too.  I fully accept this is not everyone’s cup of tea (that seems to come up a lot too, I guess it is a polite way to say “I really don’t like it”) and that is all good.  Bottom line, latter comments are the ones that make me grin and reinforce the fact that I did the right thing!!!

It is funny though, that I have taken my TR6 to non-LBC events (read street rod events) and not once has it ever been looked down upon.  Matter of fact, folks not only know what they are looking at but also compliment our efforts.  The LBC folks though are something else:  many turn their noses up and walk away, others shrug their shoulders and walk away and others give me strange looks and walk away.  But, in fairness there are some that do appreciate the work, don’t walk away and ask questions.  I’ve met many folks that way that have been very gracious.  The ones that are not gracious, well…  They are fun to meet too.

The truth is in the pudding.  My friend Mike likes to restore TR’s back to stock form.  We have a nice “agreement to disagree” thing going on, but it is all in good fun.  I’ve driven his stock TR’s and see why folks would want to keep them that way.  But then, when I get behind the wheel of one of ours…

…and suddenly I get a big grin on my face and know this is the only way to go.  If only folks could ride in our cars before they make “remarks”, they would see why we like them so much.

For what I have in bowtie6 in time, resources and effort probably I could have a newer car (I’ve been told that too, “why didn’t you just go buy an brand-x or brand-y car?”) but that would not have given me the chance to experience all that I have written about bowtie6.  I know the answer is a bit of a cliché:  it is priceless!

8 thoughts on “bowtie6 and ECOTEC vs 3.4L V6

  1. Mike

    I agree 100% Bowtie, the engine is only one part of the equation. The entire car would need to be updated to handle the additional power and speed potential. I’ve owned quite a few sportscars and modified them all to some extent but never swapped engines because of the scope of work required with such an endeavor. I have more time and resources now so I can think outside the box a little more. I’m not familiar with HPTuners but I’m pretty old school so if I go with modern power the electronic bits will be a steep learning curve. I think using a lightweight small displacement DOHC four is more fitting with the character of an MGA than stuffing in a big V6. That’s what makes it intriguing. I’m just looking at weight, dimensions, and power right now. I don’t want a hack job. I’m also not a drag racer. I just want a reliable, enjoyable old sportscar. My daily driver is a 2009 MINI JCW so my idea of enjoyable is something with similar seat of the pants “grunt”. Doubt if the handling and braking will be in the same league with the restricted wheel, tire (and brake) dimensions required by the MGA body. Still, should bring a smile in a vintage sort of way and I love the looks of the MGA.

    1. bowtie6 Post author

      Thank you for your comment. Mike. Some thoughts…

      Modern fuel injected four cylinder DOHC engines are quite amazing. Not that old-school fours were not, but with the advent of electronics and modern components these engines produce much higher performance than ever before. So whatever choice you make will require research in order to understand how to tune the engine after it has been installed. The engine will run with the ‘factory’ tune but it will perform even better once it has been properly tuned. For GM engines, that is where the HPTuners comes in handy.

      The MGA would make a great platform for an engine swap. And, will require some careful research regarding suspension, brakes and yes even tires. I follow you when you mention the restrictions involved on the MGA – an even more interesting challenge to figure out! Matter of fact, there is a new 1.4 liter version of the Ecotec with factory installed turbo – should make for a great package for an MGA. 🙂

      Good luck and keep in touch with your MGA…

  2. Mike

    I’ve been considering similar engine options for my 1959 MGA 1600 Coupe. Using an MGB engine with mods is acceptable, but I’d prefer a more modern alternative. The Zetec, Duratec, Mazda Miata, or Honda S2000 engines make more sense to me than the GM 3.4 V6, although I am told the V6 is a simpler swap! What do you think of the Zetec R 2.0 engine? I see a lot of these around for sale, but haven’t checked dimensions to see if it will fit! I like the idea of a totally stock exterior, with “Twin Cam” badges and alloy wheels with knock-off hubs. That will really cause some controversy!

    1. bowtie6 Post author

      I’ve had the GM 3.4 V6 – been there, done that. Got the T-shirt. Having said that, I would not waste the money on that engine. The engine is old, the engine management system is antiquated at best, it is heavy, and even with a ton of stuff added on ( ported heads, cam, roller rockers, etc) it really shows its age. In other words, there are many much nicer (and more modern) options available as you mention: Zetec, Duratec, Mazda, Honda.

      You ask me specifically about the Zetec. I have not done any type of research on that – however, I am sure it is a capable enough engine. I am not familiar with Ford products, but one thing you need to keep in mind with all your choices is the availability of tuning software. Is there an aftermarket package such as HPTuners available for the Zetec? What about the Mazda and the Duratec? I know for a fact the engines in the S2000 require a separate engine management system to fully tune the engine. I realize there are some packages that can do certain things but not to the extent of HPTuners.

      Finally, and this is a question that I get asked MANY times: the engine swap is only a very small part of the deal. You MUST consider all the other things that come with an engine swap. For example:

      1. How are you going to stop the thing?
      2. How are you going to provide high pressure fuel to the engine?
      3. How are you going to handle all the wiring requirements needed for the swap?
      4. How are you planning to get all this new power to the ground? And by this I mean, is the suspension up to snuff with all the extra ponies?
      5. What kind of rear end are you going to use?
      6. How are you going to keep the thing cool?

      No attitude here; just a reality check.

  3. James W

    British beauty with american dependability. Abomination? mo more so that the sunbeam tiger, or the shelby cobra. People are ignorant, ignore them, great car. Looking to build a Midget with a 2.2, wiring wise and mounting wise, how difficult?

    1. bowtie6 Post author

      LOL!! The “purists” hate this – but indeed, my car is not the first British car with American muscle under the hood. Cobras, Sunbeams, Jensen Interceptors, etc. Bottom line, my car is driven; not a garage or trailer queen.

      The Midget with the 2.2 should be very nice indeed. Wiring should not be a problem; the mounts might take some doing but that would be an excellent setup. I actually have a 2.2 Ecotec (L61) that I plan to put in my 1967 Mini Cooper. It won’t be front wheel drive – I plant to use a narrowed solid axle in the back and mount the engine/tranny RWD style.

      Regarding Midgets, you need to see this: – CLICK HERE this is a Ford 2.0 liter Duratec in a Midget that belongs to a friend of mine. Highly recommend you check out his website.


Leave a Reply

Your email address will not be published. Required fields are marked *