what do ppl think of the ef xr6? - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

great one · 08-14-2005, 02:47

what do ppl think of the motors in them and anything about the hole car.

Ghia5L · 08-19-2005, 00:30

Good diff ratio, good motor

Apart from the diff & bodykit, it's probably not really worth getting an XR6 over a GLi or a Fairmont/Ghia, as they're only marginally quicker. Mod your standard six and you'll be ahead of the XR6.

-Dave-

pepsimax · 08-22-2005, 02:04

doesn't really matter what we think,,it's your choice and money,,they are ok ,,depends on what your looking for..

great one · 08-22-2005, 03:31

yeah but xr6 comes in manual fairmont's and stuff dont.

Ghia5L · 08-22-2005, 03:43

that's where a T5 conversion comes in

... Or a BA shifter conversion

It really depends what you want to do to your car. You can start with a manual XR6 and replace the doorskins & seating with luxo gear (keeping in mind that fitting electric windows, Ghia cluster, climate control, etc may be difficult electrically), or you can start with a Ghia and slot in a T5 box, pedal box & clutch, etc. There's negligable difference between the motors, and the non-XR motors respond better to general modifications (for turboing or decent NA mods)

-Dave-

RAVEN · 08-25-2005, 01:45

Quote:

Originally Posted by Ghia5L

non-XR motors respond better to general modifications (for turboing or decent NA mods)

-Dave-

do they? how is that?

Ghia5L · 08-25-2005, 02:30

I just recall reading from an old Jim Mock article that non-XR heads are better for porting & shaving, due to the XR heads already having some work done to them. Think of the non-XR heads as being a "blank slate" on which better working can be achieved.

Having said that, XR heads tend to respond better to your basic N/A mods I am lead to believe, such as exhaust, extractors, XH snorkel, etc. (if I'm wrong, someone please correct me!)

As for turboing a car, you don't want a high(er) compression head! Boost from a turbo will "give" your car extra compression, and more compression = you need a higher octane-rated fuel to avoid detonation. Since a non-XR head has a lower compression rating than its XR counterpart, it will perform better if that particular motor has a turbo hanging off the side. I think every 2PSI that a turbo pumps into the motor = 1 point of compression. And once you go above (I think) 10:1 compression ratio, I think you need 95RON (premium) fuel for your motor.

So, if your car normally runs on 9:1 compression, having an 8PSI turbo will bump up the compression to 13:1 (8PSI = 4 points --> 9 + 4 = 13). So you'll probably need 98RON fuel for this compression ratio. This is why higher-boosting turbos need intercoolers, water injection, timing retardation, etc, to control/minimise detonation.

Your XR head might have a 10:1 compression ratio, so slapping that same 8PSI turbo on will give you 14:1. You might need 100RON fuel for this, being either 98RON + octane booster, or some form of avgas, etc etc. (or better intercooling)

Makes the car a bit more of a bitch to run.

Oh, and then there's toughening up the bottom end, such as the pistons, so that they're happy with that compression that they're dealing with. Holed piston = ouch!

-Dave-