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Guide - Stroke testing a Cleveland V8 (with Pics)


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#1 P100_Ute

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Posted 29 March 2009 - 06:11 PM

There are numerous threads around where people are asking how to find out if the V8 they have is a 302 or a 351. So i thought I'd throw up a guide with some photos to help.

I did this on the floor... With the engine still in the car it maybe harder... You might need a shorter measuring device.

1) Grab your block.. pull out all the spark plugs (i did this so i could turn the motor over easily by hand)

2) Place dipstick (or other measuring device) down the hole and turn over until the motor is at TDC (Top Dead Center).
This may take a couple of turns to make sure that the motor is at top. You can usually see this because the dipstick stops coming up and will hover slightly.

3) Use a permanent marker to mark the dipstick.

4) Put dipstick back in and turn motor until its at BDC (Bottom Dead Center)

5) Mark the point with a Marker.

6) Get out a tape and measure the distance between the lines.
3 Inches or 76mm = 302 Cleveland
3.5 Inches or 89mm = 351 Cleveland

Pictures below;

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Edited by P100_Ute, 31 May 2012 - 08:17 AM.
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#2 On Da Ghia

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Posted 30 March 2009 - 08:45 AM

Cheers for the write up, A must for anyone buying a claimed 351

Another tool to use could be a piece of wood dowl. That way you won't risk scratching up the bore.

speaking of the old "chicken skin", does anyone here practice the scrotul-pull when your on the gravy stroke?



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#3 huxly

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Posted 14 September 2009 - 12:37 PM

yea good thing to no for sure very quik and easy. alot easier than taking the sump off.

#4 mashy460

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Posted 12 October 2009 - 09:38 AM

well done no sump off lol

#5 PRO250

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Posted 12 October 2009 - 10:05 AM

That's good work P100 :hy:

#6 lll-HUNTER-lll

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Posted 04 December 2009 - 07:02 AM

that makes it a whole lot easier than the traditional way, excellent work mate keep it up :hy:

#7 XF.693

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Posted 29 March 2010 - 09:56 AM

good work, thanks for the effort. :hy:
what are the measurement for Windsor if different? and can it be also done the same way?

#8 FIXR7

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Posted 11 December 2010 - 06:17 PM

Windsors have completely different block deck heights so this method is not required.
302 = 8.2"
351 = 9.5"
At a glance, for a 302, the parting line of head to block is the same level as the top end of the timing cover.
There's about another 1" of block between the top edge of the timing cover and the head on a 351.
'69 Mercury Cougar XR7 S-code(being built....still)

#9 muzza351

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Posted 19 March 2011 - 11:43 PM

frigg that makes it easy to tell

#10 blownxe3934v

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Posted 10 August 2011 - 05:33 AM

i aggree with mussa351...........how we ment to scamm cra#k heads now :P

#11 FIXR7

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Posted 10 August 2011 - 10:06 AM

Crack heads can't read anyway.
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#12 ILIED

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Posted 10 August 2011 - 10:13 AM

they drive LS1s

#13 FIXR7

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Posted 10 August 2011 - 10:25 AM

they drive LS1s

:hihi:
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#14 zeuss000

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Posted 24 February 2012 - 07:39 AM

Howdy Folks, Can anyone supply stroke measurements for the stroked engines? 393ci 408ci etc?
Cheers
Ed

#15 ILIED

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Posted 24 February 2012 - 08:19 AM

383: 3.8"
393: 3.9"
408: 4"

Also, there are overbores to consider too.
Eg: mine's a 410 with a 4" stroke, but has a 4.040" bore. 408 has a 4.030" bore

#16 FIXR7

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Posted 24 February 2012 - 09:57 AM

Actually it's 3.85" for a 393 and 3.75" for the 383 but that's because most kits are based on a Plus .030" bore.
So you'd actually have a 387 with a 3.85" stroke and 377 with a 3.75" stroke if your engine was std bore.
'69 Mercury Cougar XR7 S-code(being built....still)

#17 ILIED

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Posted 24 February 2012 - 05:38 PM

My bad




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