A strange request - Page 2

NAD23ZX3 · 11-03-2009, 07:16 PM

and you plan to learn what, piston/valve contact=bad????

That'll be $20,000 please

ah1f39 · 11-03-2009, 07:40 PM

How about piston to head contact results in broken connecting rod. = BAD

They actualy make a compund called Plasti-guage. To measure clearances and prevent the dead part.

Who gets to clean the dyno room when you "kill" it.

iminhell · 11-03-2009, 08:27 PM

Quote:

Originally Posted by Eulaca

Keep milling small amounts from the engine and dynoing it until it dies. The fuel economy at a set point will be measured on each run.

So pretty much you want to find the compression limit of the fuel?
Because that's really all you'll be finding, well that and inherent flaws in the head/chamber/piston design (actual limit vs expected limit).
And if more fuel can suppress pre-ignition, how much more and how much does fuel economy suffer . . .

I get what your doing I think. Just be sure to do the math before hand so you know what could/should be changed in the engine to reach the expected point. If it surpasses the expected point, why.

Oh, and Plasti-gauge in a combustion chamber will tell you nothing. It's meant for bearing clearances and really nothing more.

ah1f39 · 11-03-2009, 08:33 PM

[QUOTE=Oh, and Plasti-gauge in a combustion chamber will tell you nothing. It's meant for bearing clearances and really nothing more.[/QUOTE]

It can be used to check piston to head and valve to piston clearance, When things get really close.

kylesvt720 · 11-03-2009, 08:34 PM

Man you guys know your stuff! I love this site!!

NAD23ZX3 · 11-03-2009, 08:43 PM

Quote:

Originally Posted by ah1f39

It can be used to check piston to head and valve to piston clearance, When things get really close.

that would still be called claying the engine, not plastigage. Two different compounds

uncle tail · 11-11-2009, 03:13 PM

1) "How to Build Horsepower" by David Vizard. Old school, but the premise of hp increases through flow dynamics/timing, etc.., etc... all there.

2) "High Performance Focus Builders Handbook" by Richard Holdener. Tom hates, but he hasn't published a book for us yet. Many hate but will give you some general ideas of hp increases to the individual mods that you may want to do/FI/etc.../etc....

ah1f39 · 11-11-2009, 04:54 PM

Quote:

Originally Posted by uncle tail

2) "High Performance Focus Builders Handbook" by Richard Holdener. Tom hates, but he hasn't published a book for us yet. Many hate but will give you some general ideas of hp increases to the individual mods that you may want to do/FI/etc.../etc....

His testing is not thorrow and jumps all over the place but it does give some good baseline info.

It's worth the read. Try to buy it cheap.

iminhell · 11-11-2009, 05:16 PM

^But this guy is using a 1.25L zetec. Totally different engine. The FFHB is for the 2.0 only.

. . . and if you didn't know David has his own web site now (very good one too). It's called Go Fast News. I'd urge anyone to jump on there are read --> http://www.gofastnews.com/board/technical-articles/

svtf1417 · 11-13-2009, 02:28 AM

he wont be able to use the same octane rated fuel every time either. The more the compression goes up the higher octane he will have to use so it burns slower to prevent pinging since it will want to diesel.

I say screw that test and just find out how much fuel you can dump into a cylinder to put it near hydro-lock at full throttle lol. Thats how the top-fuel dragsters are.

11-03-2009, 08:34 PM	#17
kylesvt720 Focus Addict Join Date: Nov 2007 FF Member#: 51359 Location: Lake Orion, MI What I Drive: 2003 Yellow EAP SVT Posts: 1,395 FF Reputation: 6 Buy-Sell-Trade Rating: (0)	Man you guys know your stuff! I love this site!! __________________ "Speed has never killed anyone, suddenly becoming stationary... That's what gets you." -Jeremy Clarkson

11-11-2009, 03:13 PM	#19
uncle tail Focus Enthusiast Join Date: Dec 2006 FF Member#: 41846 Location: Calgary What I Drive: 2001 Red ZTS Posts: 121 FF Reputation: 3 Buy-Sell-Trade Rating: (0)	1) "How to Build Horsepower" by David Vizard. Old school, but the premise of hp increases through flow dynamics/timing, etc.., etc... all there. 2) "High Performance Focus Builders Handbook" by Richard Holdener. Tom hates, but he hasn't published a book for us yet. Many hate but will give you some general ideas of hp increases to the individual mods that you may want to do/FI/etc.../etc.... __________________ ZETEC CREW #123 ATX Faction #48 PW. Lentec. Eibach. MBRP. CFM. Comp 2's. 1972 Mach1 351C

11-13-2009, 02:28 AM	#22
svtf1417 Focus Enthusiast Join Date: Aug 2008 FF Member#: 58428 Location: Canton, MI What I Drive: 2002 Sonic Blue SVT Focus Posts: 494 FF Reputation: 3 Buy-Sell-Trade Rating: (2)	he wont be able to use the same octane rated fuel every time either. The more the compression goes up the higher octane he will have to use so it burns slower to prevent pinging since it will want to diesel. I say screw that test and just find out how much fuel you can dump into a cylinder to put it near hydro-lock at full throttle lol. Thats how the top-fuel dragsters are. __________________ [#1417] 2002 Sonic Blue SVT Focus Born on June 25, 2002

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11-03-2009, 07:16 PM	#13
NAD23ZX3 Focus Addict Join Date: Sep 2008 FF Member#: 59327 Location: NC What I Drive: 2004 Red Zx3 Posts: 1,030 FF Reputation: 8 Buy-Sell-Trade Rating: (1)	and you plan to learn what, piston/valve contact=bad???? That'll be $20,000 please

11-03-2009, 07:40 PM	#14
ah1f39 Focus Enthusiast Join Date: Oct 2009 FF Member#: 70006 Location: Marysville What I Drive: 2002, Liquid Grey, ZX5 Posts: 108 FF Reputation: 5 Buy-Sell-Trade Rating: (0)	How about piston to head contact results in broken connecting rod. = BAD They actualy make a compund called Plasti-guage. To measure clearances and prevent the dead part. Who gets to clean the dyno room when you "kill" it.

11-03-2009, 08:33 PM	#16
ah1f39 Focus Enthusiast Join Date: Oct 2009 FF Member#: 70006 Location: Marysville What I Drive: 2002, Liquid Grey, ZX5 Posts: 108 FF Reputation: 5 Buy-Sell-Trade Rating: (0)	[QUOTE=Oh, and Plasti-gauge in a combustion chamber will tell you nothing. It's meant for bearing clearances and really nothing more.[/QUOTE] It can be used to check piston to head and valve to piston clearance, When things get really close.

11-11-2009, 05:16 PM	#21
iminhell Banned Join Date: Jun 2006 FF Member#: 36222 Location: Darwin, MN What I Drive: a delightful bottle of pills Posts: 3,413 FF Reputation: 209 Buy-Sell-Trade Rating: (3)	^But this guy is using a 1.25L zetec. Totally different engine. The FFHB is for the 2.0 only. . . . and if you didn't know David has his own web site now (very good one too). It's called Go Fast News. I'd urge anyone to jump on there are read --> http://www.gofastnews.com/board/technical-articles/