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Author
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Topic: some h/c/i set ups for 5.0L require flycut pistons
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gercolla1
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Member # 3068
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posted
 
 
This is something that I've heard of people doing themselves. Does this procedure usually require the removal of alot of material? Does one simply remove a generous amount to be on the safe side? Or do I just leave it alone and find a cam that doesnt require piston modifications?
btw,I am trying to use edblk 6025's with the 2.02 intake valves on a low mile 93 short block that I believe has hypertec/non forged pistons,is that better or worse? I am clueless ![[patriot]](graemlins/patriot.gif)
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Sf Bay Area
Posts: 2171 | From: Sampan San Francisco | Registered: Jul 2003
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mtbaughs
Road Racer
Member # 4052
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posted
Contact Apex Motorsports, they have a fly cutting tool specially made to do this job in the car(i.e. shortblock installed). Doesn't matter what type of piston.
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R.I.P. Charlie Bruno Dec 2001
Posts: 2019 | From: Boise, Idaho | Registered: Jan 2004
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98slowhoe 'FIFTYLX'
Uncle Frank
Member # 895
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posted
the Hyp. pistons are not recomended with boost or N20, the forged is stronger but thats not really a problem for you though. Talk to Acames or 93pony they did a fly cut job once and can tell you how to do it.
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AKA Franky Freaking 5 liter
Advanced Engine Development
SCT dealer
Dynotuning
Engine building
916*275*8212
88 4runner on 42's
Posts: 4206 | From: Folsom | Registered: Feb 2002
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gercolla1
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Member # 3068
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posted
Great leads,Thanks ![[Smile]](smile.gif)
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Sf Bay Area
Posts: 2171 | From: Sampan San Francisco | Registered: Jul 2003
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JohnB
Tech Moderator
Member # 969
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posted
Depending on the size of the cam you're running, you do NOT need to fly-cut the pistons. I'm running the same heads on a 93 stock shortblock with a TFS Stage 1 cam..no problems here.
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1965 Shelby Cobra
1993 Cobra
2012 F150 Raptor
2020 GT500
Posts: 6523 | From: Orlando FL/Redding CA | Registered: Mar 2002
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mtbaughs
Road Racer
Member # 4052
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posted
True, you can get away with it with a tame cam. Most people just tend to run a healthy cam on a 302 with those size valves and usually higher compression or a blower.
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R.I.P. Charlie Bruno Dec 2001
Posts: 2019 | From: Boise, Idaho | Registered: Jan 2004
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AaronC
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Member # 86
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posted
I have the Isky notching tools and 93Pony did the notching. Pretty easy to do. Just time consuming. We checked every cylinder's P/V clearance. I cut .095" exhaust and .065" intake. Total clearance for each was minimum of .125" to be on the very safe side. I run a fairly large cam with 232/228 duration at .050 on a 110 LSA with very steep ramp rates.
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1991 GT Convertible: Stock 157k mile shortblock, HiTech cam, AFR 165 heads, Edelbrock RPM intake, 1 3/4 headers
12.23 at 112.99
Best MPH 113.97
Posts: 776 | From: woodland | Registered: Dec 2000
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BlackNGold
CaliforniaFords.com
Moderator
Member # 655
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posted
Personally, I would rather buy new pistons....
I dont think it's worth the time and effort, especially when you're making a 93 hyperutetic piston weaker...Now is your chance to get some nece forged pistons.... ![[Big Grin]](biggrin.gif)
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-SLOWER TRAFFIC KEEP RIGHT-
Posts: 5132 | From: Bay Area, CA | Registered: Dec 2001
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gercolla1
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Member # 3068
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posted
quote:
Originally posted by JohnB:
Depending on the size of the cam you're running, you do NOT need to fly-cut the pistons. I'm running the same heads on a 93 stock shortblock with a TFS Stage 1 cam..no problems here.
hey John, is that cam badass or what?
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Sf Bay Area
Posts: 2171 | From: Sampan San Francisco | Registered: Jul 2003
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JohnB
Tech Moderator
Member # 969
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posted
I've had nothing but fun with this combo. Stock shortblock, O-ring'd 2.02 heads with a TEA portjob, Ported Edlebrock intake, 1.6 rollers, Stage 1 cam..and..oh ya, the SQ-trim. ![[burnout]](graemlins/burnout.gif)
The stock shortblock is getting tired...so the new shortblock is in the works now. ![[Wink]](wink.gif)
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1965 Shelby Cobra
1993 Cobra
2012 F150 Raptor
2020 GT500
Posts: 6523 | From: Orlando FL/Redding CA | Registered: Mar 2002
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jmcclesk
Moderator
Member # 1355
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posted
I talked to the head piston guy at keith black (save o lite) John Erb a few years back and he assured me that a cut of .070 on a hyper-u piston is ok, he also said a cut of .070 to .100 SHOULD be ok on a hyper-u but you are pushing it. On forged pistons a cut of .100 is safe. I have a cut of .070 on my 93 motor and it has a lot of passes at the strip (150 plus) with no problems.
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Ford trained ASE master tech.
Posts: 4024 | From: marrysville | Registered: May 2002
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gercolla1
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Member # 3068
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posted
quote:
Originally posted by JohnB:
I've had nothing but fun with this combo. Stock shortblock, O-ring'd 2.02 heads with a TEA portjob, Ported Edlebrock intake, 1.6 rollers, Stage 1 cam..and..oh ya, the SQ-trim.
The stock shortblock is getting tired...so the new shortblock is in the works now.
would you say that the tfs1 is still a good cam for a na car as well? would you happen to have the part#? or would you or anyone else suggest another?
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Sf Bay Area
Posts: 2171 | From: Sampan San Francisco | Registered: Jul 2003
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