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BF F6 Short Motor 

 

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 Post subject: BF F6 Short Motor
Posted: Sat Mar 05, 2011 12:55 am 
Oompa Loompa
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Hi there,

I have an 02 BA XR6T and ive bent the conrod in cylinder 5, apparently this was a common problem with the first generation XR6T, anyway im rebuilding the engine and i was told to go for an BF F6 short motor because they have the stronger internals. My question is can i put my BA head on the BF F6 short motor. I wouldnt think there would be an issue. Im just not sure, and i would like to be 100% before i buy it.

Cheers,

Nathan
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 Post subject: Re: BF F6 Short Motor
Posted: Sat Mar 05, 2011 7:37 am 
Getting Side Ways
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The BA XR6T had issues with the conrods on high boost, the BA head should work and solve that problem.

 

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 Post subject: Re: BF F6 Short Motor
Posted: Sat Mar 05, 2011 8:21 am 
Getting Side Ways
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Just get a egas bottom end or any turbo bottom end from 6/06 onwards.

 

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 Post subject: Re: BF F6 Short Motor
Posted: Sat Mar 05, 2011 8:44 am 
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if your rebuilding the bottom end just put some decent rods in it...
atleast you know it then can handle more than the std f6 bottom end.

 

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 Post subject: Re: BF F6 Short Motor
Posted: Sat Mar 05, 2011 9:11 am 
Oompa Loompa
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fordy4eva wrote:
Hi there,

I have an 02 BA XR6T and ive bent the conrod in cylinder 5, apparently this was a common problem with the first generation XR6T, anyway im rebuilding the engine and i was told to go for an BF F6 short motor because they have the stronger internals. My question is can i put my BA head on the BF F6 short motor. I wouldnt think there would be an issue. Im just not sure, and i would like to be 100% before i buy it.

Cheers,

Nathan

out of interest how much power were u making to bend the rod
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 Post subject: Re: BF F6 Short Motor
Posted: Sat Mar 05, 2011 10:45 am 
Oompa Loompa
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Ride: BA XR6T, 01 DRZ400E, 08 YZ250

Location: Hoppers Crossing
VIC, Australia

I was making 227rwkw on 11.5 psi

Yeah i thought it would bolt up, i was talking to a family friend who works at ford and apparently you cant get an e-gas short motor so thats why i was looking at the BF F6 short motor.
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 Post subject: Re: BF F6 Short Motor
Posted: Sat Mar 05, 2011 11:02 am 
Getting Side Ways
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gee the ba rods cant be that week to bend at 227rwks and 11.5 psi??
unless there are other factors?...
afaik au rods are similar or to an extent the same, i was at 265rwkw @12psi and am now pushing 14 psi into it and no probs...

 

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 Post subject: Re: BF F6 Short Motor
Posted: Sat Mar 05, 2011 11:49 am 
Oompa Loompa
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Ride: BA XR6T, 01 DRZ400E, 08 YZ250

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TROYMAN wrote:
gee the ba rods cant be that week to bend at 227rwks and 11.5 psi??
unless there are other factors?...
afaik au rods are similar or to an extent the same, i was at 265rwkw @12psi and am now pushing 14 psi into it and no probs...



Yeah there was another factor i had a lean out backfire which i think caused it. Didnt know why it happened until i pulled the motor out and found that the boost/vacuum line on the fuel pressure regulator that goes to the inlet manifold had a big split in it, which i pretty sure may of caused the lean out, not too sure though but sounds possible.
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 Post subject: Re: BF F6 Short Motor
Posted: Sat Mar 05, 2011 12:02 pm 
Getting Side Ways
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I dont why people recomment an egas short motor for these things. They run above 10:1 compression and would be useless for a turbo car.

You would need to change the pistons over.
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 Post subject: Re: BF F6 Short Motor
Posted: Sat Mar 05, 2011 12:18 pm 
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Dansedgli wrote:
I dont why people recomment an egas short motor for these things. They run above 10:1 compression and would be useless for a turbo car.

You would need to change the pistons over.


There is a somewhat common beflief that the rods are better. BUT by the time you throw a rebuild kit through it, an F6 or late XR6T short motor or known quantity would be the go.

 

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 Post subject: Re: BF F6 Short Motor
Posted: Sat Mar 05, 2011 9:17 pm 
Getting Side Ways
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It is a fact that F6 and post-6/06 XR6T engines use BA E-gas conrods.

 

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 Post subject: Re: BF F6 Short Motor
Posted: Sat Mar 05, 2011 9:55 pm 
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Fit a set of these and be done !!!

http://www.spoolimports.com/content/SPO ... ONRODS.asp

With a nice set of forged pistons...
Way way stronger than F6 assembly...

 

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 Post subject: Re: BF F6 Short Motor
Posted: Sat Mar 05, 2011 10:02 pm 
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sly wrote:
It is a fact that F6 and post-6/06 XR6T engines use BA E-gas conrods.

Yes. But the pistons are different. Nearly 11:1 comp in an E-Gas engine!

 

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 Post subject: Re: BF F6 Short Motor
Posted: Sat Mar 05, 2011 10:32 pm 
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you can machine the E-gas rods to accept a rod bush and using a turbo piston you have a stronger than F6 bottom end.

 

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 Post subject: Re: BF F6 Short Motor
Posted: Sun Mar 06, 2011 9:17 am 
Getting Side Ways
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Yep the turbo pistons are full floating...
They don't appear to be any stronger other than being a lower compression piston...
Is the GAS rods and piston combo full floating ?? The pin moves in both rod and piston ??
Keep in mind the Spool rods are $780 a set...
It doesn't take much labour machining to reach this amount..

 

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