Tag Archives: ecotec

ECOTEC Powered TR4

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ECOTEC engines in British sports cars are a reality.  These engines offer great power-to-weight, excellent mileage and a wonderful exhaust note.  Folks, this is the way to go when modifying a British sports car.  The proof of concept was my cousin Jim’s TR4.  He has been working on this car for a couple of years, and little by little it has become a reality.  There are so many awesome things about this car!

The frame is hand built.  This is the same design that is being used for bowtie6‘s new frame.  My frame will be a simpler version of the one on the TR4 but basically will consist of the basic principle:  square tubing, modified TR6 front suspension, and a 4 point suspension rear axle with posi-traction.

The TR4’s body has been left stock, except for the bonnet, boot lid and hard top.  These components have been hand-made out of aluminium.  Yes, aluminium.  The main directive for the TR4 was to make it as light as possible and by making these body panels from aluminium a great deal of weight was saved.

The engine is an ECOTEC 2.4 litre and matching five speed from a Solstice.  Last year, the car was tested with the smaller 2.2 litre version.  We found the engine to be awesome and very responsive.  The ECM had to be fiddled with a little, but the result was quite impressive.  If you want to see a video of the car at that time, check this out:  ECOTEC TR4 video

Pretty cool huh?  Well – that was done about a year ago and showed the car in pretty rough state.  It was in primer, things were not bolted down tight, the interior was missing and the wiring was still being worked on.  Some 1500 miles were put on the car by Jim and all pointed in the right direction:  the care was lightweight, very responsive and the frame provided a very tight, solid feel.

The TR4 was fully disassembled, this time for its final assembly including a new 2.4 litre ECOTEC, paint and interior.  This time it is for real!  After many months of work, this is what the first ECOTEC powered  TR4 looks like:

ECOTEC Engine

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The 3.4 litre V6 that has faithfully powered bowtie6 for the last 15,000 miles has been a great engine and has provided enough power to obliterate a frame.  However,  it is dated, cannot be modified furthermore and the ECM cannot be re-programmed.  An LS engine although attractive would be too heavy.  Colin Chapman had it right:  to go fast, one must keep weight at an absoloute minimum.  So a highly powerful yet lightweight engine is the ticket.

The GM ECOTEC is the answer.  This engine is truly magnificent.  The engine is all aluminium 2.4 litre twin cam 4 cylinder with variable valve timing.  In stock form, it produces 177hp and with a little boost can easily produce 250hp at the rear wheels.  The sky (no pun intended) is the limit.  I’ll let you Google for more info on the engine – suffice to say, bowtie6 has to have one.

So let me tell you about my ECOTEC engine…

Ever heard of Mallett Cars?  These folks would take a brand new Pontiac Solstice or Saturn Sky and pull the Ecotec out.  In the cavity left behind they would stuff an LS2 or LS7 V8.  Well, my ECOTEC is one of the ‘take out’ engines they took out of a Solstice/Sky.  I was lucky enough to find a gentleman that had purchased 40 of these engines.  To put icing on the cake, I was able to hand-pick my engine/tranny combo and (get this) I found one that has only 4 miles on it.  The donor car was obviously driven off a transporter and immediately modified.  Lucky me!

So where are the pictures to prove it?  Read along…

Lets start with the engine as I purchased it.  This is the engine fully crated in one of the original “LS” V8 crates.  This shows this was the “025” conversion made by Mallett Cars.

Crated ECOTEC engine…

Moving right along, here is another picture taken of the crate once we got it on a trailer:

Crated ECOTEC on trailer

Another closeup of the crate:

Crated ECOTEC closeup

And finally, the piece d’resistance.  The sticker showing four miles on the engine.  The “V8-025” matches the same numbers on the crate and once we took the crate apart we found more stickers with the same info on it.  I have no idea who “Bob Anderson” is but I presume his Solstice/Sky at one time had this engine under its bonnet.  Soon it will be powering bowtie6.

ECOTEC mileage sticker… Yes! 4 miles!