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18-11-2005, 07:43 PM
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#1
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Registered User
Join Date: Mar 2004
Posts: 6,891
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What's the difference
between an NGK BR6FS and a BPR6FS (except for a P)?
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18-11-2005, 07:58 PM
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#2
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Registered User
Join Date: Mar 2004
Posts: 6,891
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I kinda answered my own question
http://www.mattyorke.co.uk/gallery/2...sym_001?full=1
So what's the difference between a "normal" insulator and a protruding insulator? Except one protrudes. 
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18-11-2005, 08:09 PM
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#3
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numbskull
Country: United Kingdom
Location: South
Occupation: none
Interests: none
Boat name: Leviathan
Boat make: Phantom 28
Cruising area: South Coast
Join Date: Mar 2004
Location: South
Posts: 15,959
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I guess the spark is 'out amongst it' and away from the combustion chamber wall
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"I Agree with everything you say really!" - John Cooke to Jon Fuller - 26-01-2013
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18-11-2005, 09:11 PM
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#4
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Registered User
Join Date: Mar 2004
Posts: 6,891
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So in theory, the flame front starts more in the center and spreads out to the edges=more efficient combustion. But on a 1950's piece of pig iron, it won't make an ounce of difference and I'll buy the cheap ones.
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18-11-2005, 09:26 PM
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#5
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Registered User
Country: US
Location: Virginia
Interests: Quiet desperation
Boat name: A Little Noisy
Boat make: Excalibur 24
Engines: Express Racing 525
Cruising area: Mobjack Bay (where?)
Join Date: Mar 2004
Location: Virginia
Posts: 1,974
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Quote:
Originally posted by Matt
But on a 1950's piece of pig iron, it won't make an ounce of difference and I'll buy the cheap ones.
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50's indeed. The first rat motor was a child of the 60's which makes it the height of modernity!
I seem to recall a 'Hot Rod' magazine from 63 that had a Chevrolet 427 c.i. "Mystery Motor" on the cover.
__________________
I thought that having more patience was a result of my getting older. Turns out that I just don't give a sh*t.
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18-11-2005, 09:31 PM
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#6
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Registered User
Join Date: Mar 2004
Posts: 6,891
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I apologise, I was referring to the generic GM V8 family, rather than specifically the big block.
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18-11-2005, 09:35 PM
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#7
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Registered User
Join Date: Mar 2004
Posts: 6,891
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18-11-2005, 09:58 PM
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#8
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Registered User
Country: US
Location: Virginia
Interests: Quiet desperation
Boat name: A Little Noisy
Boat make: Excalibur 24
Engines: Express Racing 525
Cruising area: Mobjack Bay (where?)
Join Date: Mar 2004
Location: Virginia
Posts: 1,974
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What a fabulous engine. $10k and a 24 month insurance policy.
Didn't JF visit Bill Mitchell in Ronkonkoma a while back?
If a small block is a mouse and a big block is a rat, what's a hemi?
__________________
I thought that having more patience was a result of my getting older. Turns out that I just don't give a sh*t.
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18-11-2005, 10:06 PM
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#9
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Registered User
Join Date: Mar 2004
Posts: 6,891
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I think I might have to dry sump it to fit under the hood - even that might not be enough, so have been looking at other solutions. Reckon this is a work of art - but would probably cost a fortune:
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18-11-2005, 10:19 PM
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#10
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Registered User
Join Date: Mar 2004
Posts: 6,891
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I suppose I should point this is wishful thinking - I'll probably get something similar to an ho zz4 in reality.
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18-11-2005, 10:25 PM
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#11
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Registered User
Country: US
Location: Virginia
Interests: Quiet desperation
Boat name: A Little Noisy
Boat make: Excalibur 24
Engines: Express Racing 525
Cruising area: Mobjack Bay (where?)
Join Date: Mar 2004
Location: Virginia
Posts: 1,974
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Uh oh, I have absolutely no idea what a ho zz4 is but it sounds like it only has half the cylinders that it should.
__________________
I thought that having more patience was a result of my getting older. Turns out that I just don't give a sh*t.
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18-11-2005, 10:28 PM
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#12
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Registered User
Join Date: Mar 2004
Posts: 6,891
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It's basically the standard High Output SBC of a couple of years ago. 355hp if I remember correctly, and in a crate straight from GM with a warranty.
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18-11-2005, 10:37 PM
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#13
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Registered User
Country: US
Location: Virginia
Interests: Quiet desperation
Boat name: A Little Noisy
Boat make: Excalibur 24
Engines: Express Racing 525
Cruising area: Mobjack Bay (where?)
Join Date: Mar 2004
Location: Virginia
Posts: 1,974
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You could always try something a little different and go with a 351W crate motor. Tony Dowley replaced the wheezy 302 in his AC Mk 4 with one. Nice engine - not terribly expensive and I think 380 to 400 hp.
If you want to be really different, you could always go with a Mopar sb crate motor.
__________________
I thought that having more patience was a result of my getting older. Turns out that I just don't give a sh*t.
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18-11-2005, 10:40 PM
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#14
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Registered User
Join Date: Mar 2004
Posts: 6,891
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I could, and I know the aussie motors go with fords for emissions certification, but I've been down the road of having to make all sorts of gubbins to fit an unusual motor and regretted it from the day I built the car. So what I want in it is an SBC, but a nice one.
Some people have fitted BMW V12's - now that is a beauty. The BMW V12 is almost exactly the same dimensions as an SBC despite having 4 extra cylinders, so it fits in the car a treat.
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19-11-2005, 11:54 AM
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#15
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Registered User
Location: Scotland
Interests: Hole maker
Boat make: Humber Ocean Offshore
Engines: KAD 300/DPX
Join Date: Mar 2004
Location: Scotland
Posts: 958
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Re: What's the difference
Quote:
Originally posted by Matt
between an NGK BR6FS and a BPR6FS (except for a P)?
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Sposed to keep the tips free of carbon cos they get a bit hotter at the end.
If they're not the recommended plug, make sure your pistons don't wallop them. 
That's a nice alloy casting. 
__________________
JW.
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19-11-2005, 11:58 AM
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#16
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Registered User
Join Date: Mar 2004
Posts: 6,891
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The price for just the finished manifold & weber 45 dcoe carbs is ............wait for it................. $4900!!!!! Ouch
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19-11-2005, 12:28 PM
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#17
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Registered User
Country: uk
Location: brighton
Occupation: CABINET MAKER
Interests: SPEED BOATS,MOTO G.P
Boat name: MOTIVATION
Boat make: MARSHAN 21
Engines: AINT GOT ONE!!
Cruising area: sea
Join Date: Sep 2005
Location: brighton
Posts: 1,223
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i have about a ton of this ,basically the same thing!
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Taurus excreta cerebrum vincit
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20-11-2005, 08:16 PM
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#18
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Registered User
Country: England
Location: Hertfordshire
Occupation: Airline Operations.
Interests: Rum. Pirates. And West Cornwall pasties.
Boat name: Any suggestions?
Boat make: Ring 18
Engines: Mercury 200 Black Max
Cruising area: The Bay of 'E'
Join Date: Sep 2005
Location: Hertfordshire
Posts: 369
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Quote:
Originally posted by Ben
What a fabulous engine. $10k and a 24 month insurance policy.
Didn't JF visit Bill Mitchell in Ronkonkoma a while back?
If a small block is a mouse and a big block is a rat, what's a hemi?
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A rat wearing a round hat?
__________________
Boat: (Noun) - A hole in the water, lined with fibreglass, into which you pour money.
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20-11-2005, 08:18 PM
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#19
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Registered User
Join Date: Mar 2004
Posts: 6,891
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I never understood the whole rat & mouse thing - can you explain Ben?
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20-11-2005, 08:37 PM
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#20
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Registered User
Country: England
Location: Hertfordshire
Occupation: Airline Operations.
Interests: Rum. Pirates. And West Cornwall pasties.
Boat name: Any suggestions?
Boat make: Ring 18
Engines: Mercury 200 Black Max
Cruising area: The Bay of 'E'
Join Date: Sep 2005
Location: Hertfordshire
Posts: 369
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The length of the 'nose' determines the heat rating of the plug. I'm pretty rusty on all this, but basically the longer nose plugs run hotter and (On 2 strokes at least) tend to be less prone to fouling but make the engine run hotter and thus more prone to heat seizure if you really nail the bugger.
Most competition engines that I used to play with on bikes tend to use very cool running plugs, the reasoning being that the increased tendeny to 'soot up' isn't going to be a problem as the engine's not gonna be spending time idling. It will, however, spend most of its running time having the 'nads caned off it, so you need it to run fairly cool, or right in the middle of the gauge.
We used to cheat by blanking off bits of the rad with gaffer tape if it ran too cool on chilly days, etc.
As far as I recall, withy NGK plugs the higher the number is the hotter the plug.
'Hemi' just refers to the hemispherical shape of the combustion chamber, as opposed to Ye Olde 'flathead' engines.
No idea where 'rat' and 'mouse' came from. Sorry!
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Boat: (Noun) - A hole in the water, lined with fibreglass, into which you pour money.
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