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Old 02-07-2009, 09:05 PM   #1
REDAUXR6II
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Default 5.4 engine

Hello All,

I know this has probably been done a few times, but would a 5.4L engine physically fit into an AU Xr engine bay?

Would it be much larger than the engine that Cat600 put into his T series?

Cheers

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Old 02-07-2009, 09:13 PM   #2
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It's bigger but it can be done as I have seen it done.

If you really want a mod engine the 4.6 is the way to go though.
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Old 02-07-2009, 09:16 PM   #3
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Where would i start looking for 4.6L engines?
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Old 02-07-2009, 09:30 PM   #4
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as with EVERY one of these conversions way cheaper and beter to sell xr6 and buy ba xr8 if you want modular motor
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Old 02-07-2009, 09:35 PM   #5
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nah i want to do something different
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Old 02-07-2009, 09:59 PM   #6
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i asked this same question last year on here, the final answer i got was that the AU would be nose heavy and a pig to drive with a boss motor in it.
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Old 02-07-2009, 10:14 PM   #7
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lol ok that solves that then.
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Old 02-07-2009, 10:43 PM   #8
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i asked this same question last year on here, the final answer i got was that the AU would be nose heavy and a pig to drive with a boss motor in it.
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Old 02-07-2009, 10:47 PM   #9
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the au front suspension and steering is much the same as ba isn't it? and if you were to use a 4.6 they are all alloy aren't they?
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Old 02-07-2009, 10:50 PM   #10
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How about a B series turbo six engine as an alternative?
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Old 03-07-2009, 07:53 AM   #11
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I am actually considering a raptor S/C kit as well, but I am unsure of whether it will affect getting the through rego?

Has anyone been through the process of fitting a S/C to the car and what they had to get done to pass rego?
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Old 04-07-2009, 12:13 AM   #12
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what state are you in? some states are more leniant than others in regard to modifications, i have no idea which is best but one of the guys on here will have a clue what your up against.
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Old 04-07-2009, 08:34 AM   #13
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i live in NSW
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Old 04-07-2009, 11:16 AM   #14
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A number of blokes here have put superchargers on their cars, particularly I6s, but quite often the SC and gear appears for sale a number of months later.

Not sure exactly why, but it appears to be something that people can't get absolutely right.

I've also noticed that there's a number of SC'ed V8s around, and they have ended up the same way, or have taken a while to sell.

I understand you want to do something different, but I suspect all that will do is cost you a packet (which really is overcapitalising for the I6), for no extra resale value later on, and give you a lot of headaches.

Of course the car and hard earned cash is yours and the decision is all yours.

I wouldn't do it though.

I'd probably sell the XR6 and Get a AU 220 V8 with 5 speed and give that a few mild mods (exhaust, extractors, CAI) and be done with it.

All the best with your deliberations.

GK
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Old 04-07-2009, 12:12 PM   #15
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What about something like a turbo?

I am only chasing 220 to 240 rwkw at the moment.
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Old 04-07-2009, 01:53 PM   #16
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Quote:
Originally Posted by REDAUXR6II

I am only chasing.......
For now! LOL!

Watch out for that mod bug.

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Old 04-07-2009, 02:49 PM   #17
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well I decided to go to Crescent Motorsport and talk to them about options.
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Old 04-07-2009, 06:23 PM   #18
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Quote:
Originally Posted by CAT600

http://www.fordforums.com.au/showthr...=boss+motor+AU

funny??
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Old 04-07-2009, 06:32 PM   #19
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Quote:
Originally Posted by REDAUXR6II
I am actually considering a raptor S/C kit as well, but I am unsure of whether it will affect getting the through rego?

Has anyone been through the process of fitting a S/C to the car and what they had to get done to pass rego?
Send a PM to ClassicAU about that. He'll give you reasons to not do this.
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Old 04-07-2009, 07:20 PM   #20
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Originally Posted by Mont5.0
Yes, it is funny, because my blown 4.6L is HEAVIER than a N/A Boss engine and, with the right springs and shocks in the front, it drives great and feels quite well balanced ...... in fact, when I weighed the car on a bridge I did a F:R split and it was 56/44..... not bad for an iron block modular with a blower!

You can thank the heavier AU IRS for that.

There is no difference in engine location between AU and BA, as they have the same front crossmember and the same front suspension position.... so I would not assume that a BA "accepts" the Boss better than the AU because it was "designed' for it. There is no difference there

Daniel
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Old 04-07-2009, 07:44 PM   #21
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I had a talk to Joe at Crescent and he has changed my outlook on what to do with my AU.

It looks like I will go with a stage 4 kit at this point!!!! he recons about 170-180 RWKW
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Old 05-07-2009, 08:24 AM   #22
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Quote:
Originally Posted by CAT600
Yes, it is funny, because my blown 4.6L is HEAVIER than a N/A Boss engine and, with the right springs and shocks in the front, it drives great and feels quite well balanced ...... in fact, when I weighed the car on a bridge I did a F:R split and it was 56/44..... not bad for an iron block modular with a blower!

You can thank the heavier AU IRS for that.

There is no difference in engine location between AU and BA, as they have the same front crossmember and the same front suspension position.... so I would not assume that a BA "accepts" the Boss better than the AU because it was "designed' for it. There is no difference there

Daniel

Thats awesome info. Thankyou. I wonder what the F:R split would be on a Live Axle AU?
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Old 05-07-2009, 10:48 AM   #23
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Originally Posted by Mont5.0
Thats awesome info. Thankyou. I wonder what the F:R split would be on a Live Axle AU?
Probably 60:40 The IRS is pretty heavy in an AU..... if I was going to go MOD in a live axle AU, it would be alloy block 4.6L with turbos to keep the weight lower (COG) and lighter.

For the sake of comparison, I did a weight split back in '99 on a manual trans AU XR8 with the factory iron heads.... it was 54:46 and the car was 1720kg. By shifting weight in the split forward 2% by adding a modular (and that's not reducing weight at the rear just adding more at the front, that means that my T1 should equate to 1798kg, which is right on what i got at the weighbridge last year.

Daniel

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