No. Anything above 500hp requires an engine rebuild. $25,000 minimum for blue printing and the whole 9. This option is not for me at this time.

I agree, me neither.

My goal was to build an E53 that is track capable. I have never been interested in straight line speed.

I've spent countless hours looking at how far I can go with the 4.6. The bottom end of the engine might take it but the transmission and drivetrain won't take near 700HP even if you can find a way to get to 700HP. The stock engine and drivetrain, while conservative, was only designed for an engine generating 340HP and 382TQ. With the mods I am doing now I expect the transmission will fail soon after. I have a source ready to beef it up and increase the torque convertor stall speed. If I keep chasing expensive weakest link failures it will be time to back off on nitrous until it is reliable and then sell it and start over with an X5M.

The X5 is very heavy. Unless top speed is ones goal I think mods need to be torque focused. Torque gets you going and HP keeps you going. Light to light races are usually won in the first 60 feet. I think the best torque curve for an X5 is one that increases very rapidly to peak, stays fairly flat and falls off slowly after HP curve crosses over. When I started I researched rear mounted twin turbos and superchargers. The primary reason I chose nitrous was it was the only route that delivered the torque curve I wanted.

There is plenty of torque with a supercharged M54, provided the vanos upgrade has been performed.

When discussing 600 or 700 hundred horse power with a manual gearbox, I would be inclined to keep my shifts extremely conservative. JMHO..

Not jumping into the middle of you guys fun, but I will say that it’s all in how you want the power to come on and the purpose of the build...

Back in the day a buddy and I both had foxbody mustangs, mine was an 87, his was an 89. He was running a well built 302 with a kennybell supercharger putting out 520 dyno verified horsepower and I was running a very well built 302 putting out 405 naturally aspirated horsepower, also dyno verified.

Every time we raced (light to light) he stomped me (obviously)... So, when I scrapped the cash together I picked up a 125 hp nitrous worx nitrous system, which in theory put me at 530 hp to his 520 - not enough of a difference to be concerned with honestly - but I can say - he never beat me again. We would come off the line about equal and as his built power... I was gone!

Again - all in what you’re looking for and the purpose of your build. Turbos and superchargers - in my opinion - are “long haul power”, quarter mile type, nitrous does it too but light to light... nitrous is OMG!


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Methanol injection and Nitrous installed
 

I had an 87 as well. One of my favorites!

I never had a problem smoking the tires!

Oh man I LOVED my 87, I think back to how stupid I was to sell it.... so much so that I just picked up another black on grey 93 notchback [emoji106]

93 is a 5sp, 306 (bored .30 over) with trickflow heads, ported cobra intake and all the goodies.

I just couldn’t get the performance that I wanted out of my X (for a price that I wanted to spend) so I had to get a new toy - or, another toy as my wife would say [emoji16]

I have a soft spot in my heart for the foxbody mustangs to this day... I’m actually looking at another 93 notchack that is still all stock that my son would love to have one day.


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Methanol injection and Nitrous installed
 

I got my 87’ and it stunk like fuel. Bad fuel cell, if you know what I mean. My Stang was awesome!

My bank account and I go round after round with my E53.

Methanol injection and Nitrous installed
 

BC, there has to be a way to build it!

Make sure you take a look at your main bearings!

Ha - I know that feeling! I just pulled my rear calipers to paint them blue and found the bottom bolt on the passenger side caliper broken off! Thank goodness it was just the head and the shank stayed in the caliper or it would have been catastrophic! It’s totally a love hate... mainly me hating that I love it so much!



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I wonder if you could pull the shafts and diff gears and have the shaft heads cut back and say “41” spline ends welded on and “41” spline diff gears cut - would cost a pretty penny for sure but I’m sure would add some strength... but there’s still the trans and transfer case to contend with... and I’m sure any mods to it would cost more than another good used E53 [emoji50]

Never opened the bottom end of one yet, but I’d be curious if you could main girdle a 4.4/4.6, hmmm


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