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| 250 WHP Supernatural 3.4 Build (Page 43/47) |
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jdv
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DEC 28, 11:01 PM
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La fiera nice build.I had a stock 3500 and that was fun but nothing like that beast.
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Will
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DEC 30, 08:49 AM
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| quote | Originally posted by Raydar:
These?
Click me!
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Actually, those might be the Potter castings. The aluminum versions of the Fiero heads were production prototypes; those are... not.
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Will
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DEC 30, 08:50 AM
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| quote | Originally posted by La fiera:
WOW!!!!! I didn't know that existed! That's a unicorn!
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They're not exactly common, but I think I see one for sale about every year.
| quote | Originally posted by La fiera:
If i get that block I'd do exaclty that!
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If you get it, treat the exposed surfaces with Cerakote MC-5100 to keep it pretty and shiny.[This message has been edited by Will (edited 12-30-2019).]
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La fiera
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DEC 30, 11:08 PM
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Before I had the fuel pressure dropped from 50psi to 0 within 4 seconds after priming the system. I replaced the fuel pump with a Walbro 480lph and a new FPR.
This picture was taken 15 minutes after priming the system. We are good now! It seems that the check valve in the pump was bad.
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Will
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DEC 31, 03:08 PM
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| quote | Originally posted by lou_dias:
I almost bought one of those 10+ years ago but when I read the specs, it could only be bored to about 3.2L ... |
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It should be good for at least a 92mm bore. I'm pretty sure that's what GM calls out as the max bore. It could probably go to 94mm if you stay naturally aspirated and be careful that the head gasket fire ring still falls on the end of the liner.
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lou_dias
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JAN 03, 01:43 PM
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| quote | Originally posted by Will:
It should be good for at least a 92mm bore. I'm pretty sure that's what GM calls out as the max bore. It could probably go to 94mm if you stay naturally aspirated and be careful that the head gasket fire ring still falls on the end of the liner. |
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My next engine will use a 97mm bore. ;-)
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Will
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JAN 04, 03:35 PM
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| quote | Originally posted by lou_dias:
My next engine will use a 97mm bore. ;-) |
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If I could do that with the aluminum block, I'd already have built one. Why couldn't they have siamesed the liners?  [This message has been edited by Will (edited 01-04-2020).]
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lou_dias
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JAN 05, 12:18 PM
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| quote | Originally posted by Will:
If I could do that with the aluminum block, I'd already have built one. Why couldn't they have siamesed the liners?
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IDK, but the question I want answered is: having seen a 3500VVT block in person - I wonder if that 3.37" stroke crank will bolt onto a 3400 block...
The blocks don't look that different at all.
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Will
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JAN 05, 08:34 PM
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The 3900VVT (LZ9) has the same 84mm stroke as the 3100, 3400 & 3500 LX9.
The 3500VVT (LZ4) has a 75mm stroke, but so does a 2.8.
The VVT engines upsized the rod journals to the 4.3 V6 size at 2.25".
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La fiera
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JAN 05, 08:59 PM
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| quote | Originally posted by Will:
The 3900VVT (LZ9) has the same 84mm stroke as the 3100, 3400 & 3500 LX9.
The 3500VVT (LZ4) has a 75mm stroke, but so does a 2.8.
The VVT engines upsized the rod journals to the 4.3 V6 size at 2.25". |
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How about the mains, are they the same as the V6 60*?
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