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They have to catch me first........hence no throttle stop.........
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Engine options from FE Specialties.....
http://www.fespecialties.com/HTML/EngPackage.html 390 570 HP $8,995 428 635 HP 12,495 Add $3k for an Aluminum Block 427 SO 680 HP $15,495 They all look exactly alike from the top !!!!!!!!!! Any of these will fry the tires in a light weight Cobra, pick your poison, $6,500 difference top to bottom. Tony R. |
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Maybe I'll walk over and ask. FES is a stone's throw from me. |
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You're going from a flat tappet cam to a roller cam.
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Hi Gunner,
The details are available from Tom Lucas at FE specialties, he is well respected here in the Bay area for his FE motors. The point being that you can start with 40 year old Iron or get new castings in Iron or Aluminum, either way add in the right components and cost escalates quckly. The base 390 uses original style crank and connecting rods and is a budget build, I'm pretty sure that is not the 570 HP version of the motor. I saw a 390 orginal style motor that had been gone through, machined, Dyno tested and ready to install this past weekend for $5,750 at the Mustang Ranch in Santa Clara last weekend. The budget build can be had that will make 400-450 with a 390 very inexpensively. An FE can make 500+ HP with the right stuff inside, the cost of the block is simply the price of entry, you pick the right components from there (Same Cost i.e. Crank, Heads, roller rockers, Connecting Rods, Cam etc.etc.) and the 390/428/427 will all get there. A key ingredient is to have the expertise to put it together. One Man's opinion........ Tony R. |
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I have an engine from FE Specialities. Tom knows FE's. When we spec'ed out the engine, he said it would make "x" HP and when we were done, it made almost exactly "x" HP.
Having said that, 570 HP from the 390 seems a little aggressive, though from the wording it's "capable of up to 570 HP." |
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I can say with a very high degree of certainty based on many dyno runs that the average 445 cube stroked 390 on pump gas will get you between 475 and 500 horsepower and +-500TQ. This would be with a set of tweaked Eelbrock heads, a dual plane intake, a slightly lumpity flat tappet cam and a 750 Holley.
I've had several customers build their own and get them dyno'd with comparable results - no magic involved... So I'd suspect that with more compression, worked over heads, and a really snotty cam that 570 mark is very attainable... |
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For the most builds, Barry, Tom, Keith, George all basically know what they'll get since they know what they're doing and have been doing it a long time. |
Rod, that's a good bit of horsepower. Can you put the throttle all the way to the floor with the revs over 3000? Or do you get wheelspin? I'm serious -- you've got, like, 20% more horsepower than I do and can't harness what I have with my 295/50 Yoko Avids (which are pretty decent tires, btw) and, as I recall, we've got pretty similar gearing.%/
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However, with SAAC 35 at Sears Point (not calling it Infineon) next year, I'm hoping to "step out a bit." I have a 3.42 rear gear with the TKO600. |
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At my advanced age :rolleyes:, peer pressure is meaningless. |
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Hi Kevin. When I built my first Cobra, I could only afford to go 390 GT. It is an excellent engine...but...definitely a mid-range mover! It really came to life with a gear change. Since the first Cobra, I have experienced 428, 427 and 488 (Stroker)...never go back to the 390. There are a lot of stroker kits available these days for not too much money and it is definitely worth the effort. Start with a good block (pre 68) and have it sonic checked for wall thickness and go from there.
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Hey Wolfzter
What gear change are you talking about? Rearend I assume but what did you have and what did you change it to? John |
Hey John...I should have been more specific. Along with my budget, I used a Toploader I had lying around as well as a set of 2.73 gears...not an optimal combination with the 295-50-15 tires (but cheap). After nearly getting waxed by a blown Mustang I went with the 3.50 gears and this thing came to life...I had to watch my speed on the highways (65-70 max). Since those hungry years, I have discovered the Tremec solution...Cheers, Wolf
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