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Author Topic: Australian Jaguar Build  (Read 35980 times)

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Offline Lynchy

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  • Posts: 124
  • Location: Brisbane - Australia
Re: Australian Jaguar Build
« Reply #90 on: January 21, 2016, 05:55:08 AM »
Another long overdue update.....

The jag won't be going to Speedweek at Lake Gairdner this year. Gary has parked it for this year pending another engine build. So far, the Jag ate a motor on it's first year out (in 2014) running just under 200mph on it's maiden voyage - well, almost maiden voyage, he had to do his licencing runs in the days leading up to the sub 200mph spin out run.

Fun little factoid - since the DLRA got the new timing system only one piece of equipment has been trashed. A timing light hit by the Jag at full steam sideways with it's bonnet flopping on the salt. Who is in the crew for the Jag - the Chief Timer..... how embarrassing.

So he built a new engine. This one was good for 2 runs. One at 224mph and then another at 236mph (which we think makes it the world's fastest Jag?). The motor went off song just prior to the timing light with oil pressure dropping and the rear end again stepping out a little. The engine wasn't hurt too bad but needed a rebuild.

This is where Monty Python comes to mind....

So he's going to build another engine. This time the blown V12 (that wont rev to 9k - so embarrassed I wrote that - never drink and type kids!). It should be OK for power and 7000 revs is more than enough for 250mph. But...the 2.5 diff centre won't get it there. He has a Hone overdrive fitted with a nodular iron carrier and a locker. He is thinking of changing the ratio so he gets a 2.4:1 final drive. This should get it there. Does anyone have any experience using one of these. We've heard of them being used before. It's an early one which, from all accounts, is stronger... Yes? No? Maybe? Discuss?

Hopefully it will be ready next year, we all want to hear a v12 screaming down the lake with unmuffled headers!

Offline kiwi belly tank

  • Hero Member
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  • Posts: 2550
  • Age: 167
  • Location: Lava Hot Springs Idaho
Re: Australian Jaguar Build
« Reply #91 on: January 21, 2016, 11:33:09 AM »
Hey Mate, good to see you flappin ya gums again.
The Hone is a bit of a dinosaur in this day & age. They were a decent piece but can you still get parts for them plus they are a divorced unit. Jags used to use the big Laycock Overdrive & that is now owned & sold by Gear Vender. Mk 10's, 420's & XJ's also used to have a TH400 in them. I believe the Laycock is a .67 over plus you can use a TCI direct drive coupler on the 400 & loose the converter.
Back in the 80's before I moved up here I drove a turbo'd V-12 KT boat in the bridge to bridge for a guy from Gosford who was scared of the thing. It was basically a stock bottom end with Walkinshaw top end & I ran that muther wide open for an hour & 20min at 7500 with 11lb's & it never missed a beat. 
  Sid.

Offline tauruck

  • Hero Member
  • *****
  • Posts: 4883
  • Location: Johannesburg, South Africa
Re: Australian Jaguar Build
« Reply #92 on: January 30, 2016, 03:28:13 PM »
Another long overdue update.....

The jag won't be going to Speedweek at Lake Gairdner this year. Gary has parked it for this year pending another engine build. So far, the Jag ate a motor on it's first year out (in 2014) running just under 200mph on it's maiden voyage - well, almost maiden voyage, he had to do his licencing runs in the days leading up to the sub 200mph spin out run.

Fun little factoid - since the DLRA got the new timing system only one piece of equipment has been trashed. A timing light hit by the Jag at full steam sideways with it's bonnet flopping on the salt. Who is in the crew for the Jag - the Chief Timer..... how embarrassing.

So he built a new engine. This one was good for 2 runs. One at 224mph and then another at 236mph (which we think makes it the world's fastest Jag?). The motor went off song just prior to the timing light with oil pressure dropping and the rear end again stepping out a little. The engine wasn't hurt too bad but needed a rebuild.

This is where Monty Python comes to mind....

So he's going to build another engine. This time the blown V12 (that wont rev to 9k - so embarrassed I wrote that - never drink and type kids!). It should be OK for power and 7000 revs is more than enough for 250mph. But...the 2.5 diff centre won't get it there. He has a Hone overdrive fitted with a nodular iron carrier and a locker. He is thinking of changing the ratio so he gets a 2.4:1 final drive. This should get it there. Does anyone have any experience using one of these. We've heard of them being used before. It's an early one which, from all accounts, is stronger... Yes? No? Maybe? Discuss?

Hopefully it will be ready next year, we all want to hear a v12 screaming down the lake with unmuffled headers!

So Lynchy, what's going to happen to the 351C?. Is Gary going to use it elsewhere?.