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Old 06-18-2008, 08:41 AM   #1
coupe
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Turbo Fox project...

I've had my block, crank, rods, pistons, etc. for a while now. They've been "aging" in a corner of the shop because of other priorities. I pruned a few "smacktalk" posts out of this thread (including mine), since everything keeps getting delayed. LOL.

Engine will be a 331 and includes the following parts:

4-bolt R302 block
4340 forged crank
H-beam rods
Ross Pistons

Engine management will be a FAST classic sequential box.

Team Z suspension going under it along with tubular K-member and coilovers.
I have full intentions of driving the car on the street, to work, track, etc...
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Last edited by coupe; 10-05-2009 at 02:52 PM.
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Old 06-18-2008, 12:24 PM   #2
EHardy1971
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I hear ya' Matt! I know the feeling,my coupe sat under the carport for 3 years with no engine/tranny in it while I built up my 306.Not having the free time to do it all at once can be frustrating!
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Old 06-18-2008, 01:09 PM   #3
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Quote:
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Not having the free time to do it all at once can be frustrating!
yep. I had some of the parts before Italian LX even ordered his 418 stuff.
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Old 06-19-2008, 03:55 PM   #4
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You power-adder guys who've built your motors...what kind of piston clearance did you have in the bore?

I have my sights set on a figure, but I'm curious as to what you guys used. And what type piston and bore size for the given clearances.
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Old 06-19-2008, 06:05 PM   #5
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Oddly enough, I was bored, and leafing through an engine building book. This is what the guy says in regards to forced induction piston clearance:

"I prefer to bore the cylinders to within .004" of the finished size, then hone each cylinder to fit a particular piston. In this way I can keep piston clearance to a tolerance of about .0003".
[...]
First using 220 grit stones, about .003" of material is removed to bring the bore to .001" from its final size. Then another .0005" is taken out with with 280 grit stones, and finally 400 grit stones are used to bring the bore to its final diameter. This result in a very accurate bore with a fine finish that requires very little break-in."
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Old 06-19-2008, 06:45 PM   #6
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give us some SPECS on the motor.
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Old 06-19-2008, 07:00 PM   #7
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Quote:
Originally Posted by SkurdalenFox
...In this way I can keep piston clearance to a tolerance of about .0003".
Hmm..."Tolerance on a clearance"...probably along the bore. This must not be confused with a .0003 clearance alone between piston and cyl though! That would lock up in about two seconds.

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specs on the motor
Well, it's a 331. Compression is a modest 8.5:1 but I don't plan on leaving it naturally aspirated... It'll be Supernaturally Aspirated.
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Old 06-19-2008, 07:10 PM   #8
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Quote:
Originally Posted by coupe View Post
Hmm..."Tolerance on a clearance"...probably along the bore. This must not be confused with a .0003 clearance alone between piston and cyl though! That would lock up in about two seconds.
Yes, yes. I was going to say something about this guy's horrible writing.

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Supernaturally Aspirated.
Get that trademarked.
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Old 06-19-2008, 07:30 PM   #9
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so u going to have a hair dryer grey tapped in there with some long drop cords?
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Old 06-19-2008, 07:34 PM   #10
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so u going to have a hair dryer grey tapped in there with some long drop cords?
whatever it takes to win as many paper races as possible around here.
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