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351C Intake on 351M/400 study
351C Forum Tech
351C Intake on 351M/400
a quick study on intake spacers
351C Intake on 351M/400
a quick study on intake spacers
text and photos -blizzard
I was once considering making my own spacers to correctly align a 4V intake on my 400 block using 4V heads, it seemed easy, folks sell spacers all the time, what I found out though was you need a much thicker spacer then the 7/8" spacers you could by from Weiand.
Ford single plane intakeD1ZX-9424-FA, Roush stuffers
Weiand spacer, .88' thick with a Weiand end gasket of .42"
I was once considering making my own spacers to correctly align a 4V intake on my 400 block using 4V heads, it seemed easy, folks sell spacers all the time, what I found out though was you need a much thicker spacer then the 7/8" spacers you could by from Weiand.
Ford single plane intakeD1ZX-9424-FA, Roush stuffers
Weiand spacer, .88' thick with a Weiand end gasket of .42"
Intake used Ford singleplane D1ZX-9424-FA, Roush stuffers and a
new home built spacer, 1.50" thick with a end gasket spacer of 1.25"
I found that the with added height of the 1.25 end gasket atop the allready 1" higher block,my carb would hit my Cobra hood even without a air cleaner. Thus the 400 FMX block wound up in the wife's Bronco.
blizzardND |
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, Dec 27 2007, 12:22 PM EST
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| Started By | Thread Subject | Replies | Last Post | ||
|---|---|---|---|---|---|
| 417stroker | 351 c intake on a 400 block | 2 | Sep 4 2008, 2:34 PM EDT by blizzardND | ||
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Thread started: Aug 6 2008, 6:10 PM EDT
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I am using this set up on 417 , I found that the heads with the Roush stuffers would ET slower than ported heads with out the stuffers . i do a gree that the spacers could be thicker to aline the ports better .What are you using for heads and pistons ? i am using 1971 heads and flat top K / B cleveland pistons with reworked 400 rods bushed to .912 small end. this gives me about 12,7 compression. Maybe the roush stuffers work better with lower compression.
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