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  Topic Review (Newest First)
08-19-2017 03:33 PM
jshhasty
Re: Blue print 347 ford stroker fouls plugs

Thanks for the reply and video to it.
Would be a nice tool.
But Never used on for 50 years mechanical work.
Just use brass rod in spark plug hole.
My next step is to check the timing chain for off 1-2 link or worn out and true cam shaft timing.
Taught to me by a old machinist 40 years ago.
Just rotate engine to TDC compression no 1 cylinder.
Find opposite firing cylinder and pull valve covers on opposite firing cylinder.
Rotate engine from just before TDC compression no 1 cylinder to TDC compression
Look for intake and exhaust valve rocker arm rocking from intake to exhaust.
If not the timing chain to camshaft timing is off.
08-19-2017 02:20 PM
RAGGAREN
Re: Blue print 347 ford stroker fouls plugs

Quote:
Originally Posted by jshhasty View Post
TDC timing mark right on with no.1 piston TDC. compression
are you sure you used piston stop correctly...
heres how to....

08-19-2017 11:32 AM
Marauderjack
Re: Blue print 347 ford stroker fouls plugs

So Base Timing becomes 25* and Max Timing becomes 45* with no pinging??

Your timing marks have to be inaccurate somehow??
08-19-2017 08:46 AM
jshhasty
Re: Blue print 347 ford stroker fouls plugs

Before with time set to specs.
08-19-2017 07:39 AM
Marauderjack
Re: Blue print 347 ford stroker fouls plugs

Is this before or after you add the 10* to make it run better??
08-19-2017 06:08 AM
jshhasty
Re: Blue print 347 ford stroker fouls plugs

Base timing.
15 a idle and 35 at 3500 RPM.
MSD ign. and dist. with vacuum advance.
Sorry for not replying faster but I can not get forum to notify me of answers to my post.
08-19-2017 02:01 AM
Marauderjack
Re: Blue print 347 ford stroker fouls plugs

What's the Timing setting at Idle and what is total advance you see at 3500 RPM's??
08-18-2017 04:04 PM
jshhasty
Re: Blue print 347 ford stroker fouls plugs

No ping or spark knock. with time advanced 10 more degrees.
TDC timing mark right on with no.1 piston TDC. compression.


I turned a order into summit racing for the ATOMIC EFI MASTER KIT.
Will see what that does for it.
08-18-2017 12:25 PM
Marauderjack
Re: Blue print 347 ford stroker fouls plugs

Does it drive OK......no pinging??

If so sounds like your timing marks are way off.......I think you said you are going to double check TDC on #1 and report back....this could be your answer to very late timing and fouled plugs !!
08-18-2017 11:56 AM
jshhasty
Re: Blue print 347 ford stroker fouls plugs

Runs good and intake manifold back up to 16-17 degrees at idle and no gas fouled plugs.
08-17-2017 02:29 PM
Marauderjack
Re: Blue print 347 ford stroker fouls plugs

How does it run with the timing advanced 10 degrees???
08-17-2017 05:23 AM
jshhasty
Re: Blue print 347 ford stroker fouls plugs

Quote:
Originally Posted by GT350HR View Post
How can it idle at 600 rpm? My last 347 and current 408 idle at 850 . The 347 had a B cam and the 408 has an X both are in the 224-226 range @.050. "I" found I had to run a hotter plug with an aluminum head. "I" use an Autolite 3924 with 34* total timing. Idles in gear with a "stock" 11"C4 convertor , not a stall convertor. No black plugs


Thanks for the info.
No problem on idle it down even 500 RPM.
Just loses manifold vacuum an dumps to muck fuel in and gas foul plugs at low idle at base timed.
Our 347 at 415 HP from Blue print engine was one they redone with used stuff from there warranty stock.
They may have put a mismatched caw or wrong cam.
We have tried hotter plugs and all kinds of Edelbrock carbs from 500 cmf to 6500 cmf Edelbrock jets and metering rods and metering rod springs.
Even a Holley dual pumper.
Only thing that helps is to advance timing another 10 degrees over base.
08-15-2017 03:33 PM
GT350HR
Re: Blue print 347 ford stroker fouls plugs

How can it idle at 600 rpm? My last 347 and current 408 idle at 850 . The 347 had a B cam and the 408 has an X both are in the 224-226 range @.050. "I" found I had to run a hotter plug with an aluminum head. "I" use an Autolite 3924 with 34* total timing. Idles in gear with a "stock" 11"C4 convertor , not a stall convertor. No black plugs
08-14-2017 05:39 PM
jshhasty
Re: Blue print 347 ford stroker fouls plugs

Thanks
Good idea.
You may be right.
Will double check with no 1 piston TDC compression.
Also check cam timing with 1 TDC and opposite firing cylinder on valve rocker arm rocking intake to exhaust.
I can not hear good enough to hear pin/spark knock but will get owner to drive it with timing advance up to good vacuum..
08-14-2017 02:39 PM
falconfred
Re: Blue print 347 ford stroker fouls plugs

I'm thinking that you may not have your timing marks indexed correctly. I say this because when you advance the timing, your manifold vacuum goes right up to where it should be. Does the engine ping under load when you advance the timing?

Ford used at least three different combinations of vibration dampers, timing pointers and front covers on the small block Windsors. If you mix them up, it's possible to be off on your tdc mark.

I would try bumping your initial timing 2 degrees at a time until you get a slight pinging under load, then back it off 2 degrees. This may solve your problem.
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