2004 xj8 460 532 bbf build
#21
Once you get the DOHC heads out of the way the engine bay is cavernous!
Not to hijack your thread--noticed the Jag fuel rail in your pics. Any chance you could measure the resistance of that fuel rail temp sensor? Just looking for a room ambient measurement. If you're going to toss it I'd buy it from you. PM me if you can.
Thanks,
-Michael
Not to hijack your thread--noticed the Jag fuel rail in your pics. Any chance you could measure the resistance of that fuel rail temp sensor? Just looking for a room ambient measurement. If you're going to toss it I'd buy it from you. PM me if you can.
Thanks,
-Michael
#23
#24
so my boss is a race car builder and says to stay away from the c6, he thinks he can get me a turbo 400 with c6 bell for around 2000, i am not sure if its worth it as i wont be able to get enough traction to tear anything up anyway lol! a Hughes c6 with converter is 1500 bucks from summit, ill have to think about this one. i need the longest transmission i can get to make the mount semi line up with the factory jaguar cross member, alot of guess work so far but everything looks to line up great.
Last edited by 04 xj8; 06-02-2017 at 10:21 PM.
#25
oh and so far everything on the car still works, i pulled the entire engine wiring harness from the firewall, i do not want to tap into the jaguar electronics and bypass whatever i can, notice my msd 1 wire ign, lol there are a million warnings on the dash but honestly they are round and look about the same size as a mechanical gauge so mabye in time i can swap those out with mechanical gauges but that is after i get this running and driving.
also the front end is not sagging with this coil spring conversion, it sets exactly the same as it did before though i know this 532 is a ton heavier than the 4.2,
also the front end is not sagging with this coil spring conversion, it sets exactly the same as it did before though i know this 532 is a ton heavier than the 4.2,
#27
what i hope to do is use the jaguar starter wire to crank the motor, i will see if its getting power without the eng wiring harness tommarow, the start wire is on the same side as the ford starter, if i recall this car has auto start which i do not want, if it sends power to the wire and works like im hoping then i can use my jaguar ign switch.
#28
Join Date: Jul 2012
Location: Beautiful Pilot Mountain NC
Posts: 656
Received 183 Likes
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103 Posts
Thanks for the great photos!
As you're removing the AC system(?), assume this will be a Sunday fun car?
Too bad about the water pump snout. Are there any "block hugger" pump options that would allow you to use the jag radiator? With the AC condenser removed, you would have room for elec fans, and the radiator would probably be big enough. Keeping that big lump cool will be a challenge
With the stock XJ8 diff R&P (2.87?), and assuming you use something like a 2000 + rpm stall converter, you'll probably spend a lot of time in first and second gear
What rpm is peak torque on your big block? Lowest decent idle RPM?
Do you plan to drag race? 1/4 or 1/8 mile?
Here's a link to Jag spec book pdf (you may already have this):
http://jagrepair.com/images/AutoRepa..._2007_2004.pdf
Yeah, the instrument panel may need to go stone axe as well, though I believe the VSS is in the rear diff, so your speedo should work. The ign key will provide a solenoid signal at some level in the circuit, though you will prob need to dig for it, and then use a relay before the old school ford solenoid. Check around first (see below)
Jag Specialties sells kits for doing GM V8 swaps. Here's an LS1 in an '02 X308:
Jaguar Specialties
They may be able to help with the instrument panel interface. Also, they have some experience with various Jag rear diff options and fuel system interfaces
Assume this swap will be carbureted? Will you use the stock jag EFI pump with pressure reducer/regul
As you're removing the AC system(?), assume this will be a Sunday fun car?
Too bad about the water pump snout. Are there any "block hugger" pump options that would allow you to use the jag radiator? With the AC condenser removed, you would have room for elec fans, and the radiator would probably be big enough. Keeping that big lump cool will be a challenge
With the stock XJ8 diff R&P (2.87?), and assuming you use something like a 2000 + rpm stall converter, you'll probably spend a lot of time in first and second gear
What rpm is peak torque on your big block? Lowest decent idle RPM?
Do you plan to drag race? 1/4 or 1/8 mile?
Here's a link to Jag spec book pdf (you may already have this):
http://jagrepair.com/images/AutoRepa..._2007_2004.pdf
Yeah, the instrument panel may need to go stone axe as well, though I believe the VSS is in the rear diff, so your speedo should work. The ign key will provide a solenoid signal at some level in the circuit, though you will prob need to dig for it, and then use a relay before the old school ford solenoid. Check around first (see below)
Jag Specialties sells kits for doing GM V8 swaps. Here's an LS1 in an '02 X308:
Jaguar Specialties
They may be able to help with the instrument panel interface. Also, they have some experience with various Jag rear diff options and fuel system interfaces
Assume this swap will be carbureted? Will you use the stock jag EFI pump with pressure reducer/regul
#29
Thanks for the great photos!
As you're removing the AC system(?), assume this will be a Sunday fun car?
Too bad about the water pump snout. Are there any "block hugger" pump options that would allow you to use the jag radiator? With the AC condenser removed, you would have room for elec fans, and the radiator would probably be big enough. Keeping that big lump cool will be a challenge
With the stock XJ8 diff R&P (2.87?), and assuming you use something like a 2000 + rpm stall converter, you'll probably spend a lot of time in first and second gear
What rpm is peak torque on your big block? Lowest decent idle RPM?
Do you plan to drag race? 1/4 or 1/8 mile?
Here's a link to Jag spec book pdf (you may already have this):
http://jagrepair.com/images/AutoRepa..._2007_2004.pdf
Yeah, the instrument panel may need to go stone axe as well, though I believe the VSS is in the rear diff, so your speedo should work. The ign key will provide a solenoid signal at some level in the circuit, though you will prob need to dig for it, and then use a relay before the old school ford solenoid. Check around first (see below)
Jag Specialties sells kits for doing GM V8 swaps. Here's an LS1 in an '02 X308:
Jaguar Specialties
They may be able to help with the instrument panel interface. Also, they have some experience with various Jag rear diff options and fuel system interfaces
Assume this swap will be carbureted? Will you use the stock jag EFI pump with pressure reducer/regul
As you're removing the AC system(?), assume this will be a Sunday fun car?
Too bad about the water pump snout. Are there any "block hugger" pump options that would allow you to use the jag radiator? With the AC condenser removed, you would have room for elec fans, and the radiator would probably be big enough. Keeping that big lump cool will be a challenge
With the stock XJ8 diff R&P (2.87?), and assuming you use something like a 2000 + rpm stall converter, you'll probably spend a lot of time in first and second gear
What rpm is peak torque on your big block? Lowest decent idle RPM?
Do you plan to drag race? 1/4 or 1/8 mile?
Here's a link to Jag spec book pdf (you may already have this):
http://jagrepair.com/images/AutoRepa..._2007_2004.pdf
Yeah, the instrument panel may need to go stone axe as well, though I believe the VSS is in the rear diff, so your speedo should work. The ign key will provide a solenoid signal at some level in the circuit, though you will prob need to dig for it, and then use a relay before the old school ford solenoid. Check around first (see below)
Jag Specialties sells kits for doing GM V8 swaps. Here's an LS1 in an '02 X308:
Jaguar Specialties
They may be able to help with the instrument panel interface. Also, they have some experience with various Jag rear diff options and fuel system interfaces
Assume this swap will be carbureted? Will you use the stock jag EFI pump with pressure reducer/regul
I hardly even need ac in idaho, i hope it will stay cool but it will need a good radiator and cooling fans, I am half tempted to get a electric water pump, it will be a sunday driver but i will drive it to work also. i haven't started this motor since it came off the dyno.
#30
Join Date: Jul 2012
Location: Beautiful Pilot Mountain NC
Posts: 656
Received 183 Likes
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103 Posts
Your engine builder can give you those rpm numbers. And, they're probably right on the cam card
My only experience is with GM big blocks, and if IRRC, a 500 ci rat motor making over 600HP is pretty fluffy below 2500 RPM
What cam are you using? Set straight up?
Regarding gearing, I checked - the x350 diff is an 8" visteon. Lowest OE R&P is ~ 3.58. Quaife torsen LSD is still available; ~$1,500
Reason I asked about your engine build was possibility of using the XJ8 trans. If this will be primarily a street car, you might want to consider it. The ZF 6 speed is pretty stout, and there are apparently high stall converters available eg
(* Looking For A 6 Speed High Stall Ford Torque Converter?
Using an old C6 or TH400 drag trans on the street with that way-high R&P might get old pretty fast. Most C6 gearsets are 2.46 / 1.46 / 1.00. The 6HP will be something like :
1 2 3 4 5 6 R
4.171:1 2.34:1 1.521:1 1.143:1 0.867:1 0.691:1
This would make things way more liveable.
Another thing to consider is trans cooling. With the C6, the OE XJ8 R&P and a 2500 RPM converter, you will be in slip most of the time, which makes a ton of heat
Love that you're doing this swap. Making it truly streetable will be the challenge
My only experience is with GM big blocks, and if IRRC, a 500 ci rat motor making over 600HP is pretty fluffy below 2500 RPM
What cam are you using? Set straight up?
Regarding gearing, I checked - the x350 diff is an 8" visteon. Lowest OE R&P is ~ 3.58. Quaife torsen LSD is still available; ~$1,500
Reason I asked about your engine build was possibility of using the XJ8 trans. If this will be primarily a street car, you might want to consider it. The ZF 6 speed is pretty stout, and there are apparently high stall converters available eg
(* Looking For A 6 Speed High Stall Ford Torque Converter?
Using an old C6 or TH400 drag trans on the street with that way-high R&P might get old pretty fast. Most C6 gearsets are 2.46 / 1.46 / 1.00. The 6HP will be something like :
1 2 3 4 5 6 R
4.171:1 2.34:1 1.521:1 1.143:1 0.867:1 0.691:1
This would make things way more liveable.
Another thing to consider is trans cooling. With the C6, the OE XJ8 R&P and a 2500 RPM converter, you will be in slip most of the time, which makes a ton of heat
Love that you're doing this swap. Making it truly streetable will be the challenge
#31
#32
If your tires don't break loose, you will probably overstress the driveshaft and differential, and maybe bend the entire chassis. Used XJs are throwaways unfortunately, so doesn't matter if you destroy it. Hate to say that but poor Jag engineering makes it inevitable that few persons will pay average $2k year in maintenance for a $15k car.
Perhaps a better option than a big block with way too much weight and torque would be a 351 Cleveland or 5.0 Coyote. If you live where they don't smog check you can put anything in there; hmm perhaps an Aston Martin or Rolls Royce V-12?
Perhaps a better option than a big block with way too much weight and torque would be a 351 Cleveland or 5.0 Coyote. If you live where they don't smog check you can put anything in there; hmm perhaps an Aston Martin or Rolls Royce V-12?
#34
#38
figured out starter wiring, its pretty much plug and play, my switch works with the ford starter, meaning my factory jaguar ign switch will start this thing with no other mods, about ready to start this thing after i get a yoke for the transmission. motor and trans are all bolted down and ready to roll.
#39