Reviving the Jag... - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Your Other Rides: Pics & Videos Post your pictures of your non-GM vehicles. Also discuss mechanical problems regarding your non-GM (Car vids not yours should be in the lounge)

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Old 04-09-2010, 03:34 PM   #11
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that is one unique project.thats something you can really be proud of when its complete. what motor is in that Regal of yours?
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Old 06-08-2010, 11:39 AM   #12
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that is one unique project.thats something you can really be proud of when its complete. what motor is in that Regal of yours?
The Regal'* motor is the L27. Old reliable. However, on the 19th the car is going to Ohio for an engine swap with an L67, the Series 2 3800 Supercharged.

The Jaguar arrives to my driveway in Illinois today. Took the company a month to find a driver, but they did it. I'll probably take off work early to get the car off the truck. Pictures and videos to come.
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Old 06-09-2010, 11:56 AM   #13
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Awesome X. Can't wait to see it!
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Old 06-11-2010, 11:47 AM   #14
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From the XJS-Help book:

WHAT’* IN A REDLINE?: Some people, probably accustomed to American pushrod V8’*, feel that the 6500 RPM

redline marked on the tach is really aggessive and far too high for an engine this big for everyday use. Nothing could be

farther from the truth; this is

not an American pushrod V8, it’* an OHC V12 with an unusually short stroke. Roger

Bywater, who worked in the engine development department at Jaguar when this engine was designed, provides a more

realistic understanding of just what that 6500 RPM redline is all about: “6500 r.p.m. is certainly safe and 7000 would

not be a cause for concern. In fact I know of basically standard 5.3 V12s cobbled together with second hand bits being

taken to near 8000 in race cars without suffering any problems at all. On the other hand an elderly engine does deserve a

certain amount of respect. I expect the one thing that would result is that the timing chain and tensioner would start to

show signs of distress a bit sooner if subjected to continual high r.p.m. In reality, there is not much point in revving a

standard V12 beyond 6000 because it will be running out of breath anyway and therefore won't be making much power.





Here'* where my heads come in. They're ported, polished, and so are the intake manifolds, throttle bodies, downpipes, and custom mandrel bent 3" intakes. The engine can now breathe, and with as simple as a vacuum modulator kit, I can crank up that shift point. I think 7500 RPM is what I'm going to shoot for. 5.3L V12 at 7500 RPM should sound downright sexy, and with 80% of torque at 2000rpm and a Turbo 400 with a 2.88:1 rear end, it should also be fast as hell.

I revved it right before pulling it into the garage one last time, at 4000 rpm, with nothing but downpipes on. I have a feeling the whole damn neighborhood heard me.
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Old 06-13-2010, 01:12 AM   #15
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I have a feeling the whole damn neighborhood heard me.
That is A.W.E.*.O.M.E.!!!
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Old 09-10-2010, 06:14 PM   #16
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Ever wanted to hear what my Jag V12 sounds like at 5500 RPM? Had to move it out of the garage earlier and figured this would be a good time to find out. Keep in mind this baby redlines at 6500.

http://www.youtube.com/watch?v=xrXEy6daay0
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Old 09-10-2010, 11:07 PM   #17
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Wow sounds great. How good does it sound with the full stock exhaust on?
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Old 09-10-2010, 11:14 PM   #18
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Wow sounds great. How good does it sound with the full stock exhaust on?
You can barely hear it. The stock exahust has 4 catalytic converters and 4 mufflers.
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Old 09-10-2010, 11:18 PM   #19
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Wow now that'* one heck of a exhaust setup
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Old 09-10-2010, 11:32 PM   #20
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Wow now that'* one heck of a exhaust setup
Oh yeah I forgot, and 1.5" flared entry ports for the intakes in order to further reduce noise. I'm turning this Jaguar into a real animal.

You have to hear it in person, but it sounds so damn sexy.
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