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STROKER 6 CRANK

Started by _hypo hb_ , Feb 18 2010 10:57 AM

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187 replies to this topic

#126 Steve TPF

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Posted 23 October 2013 - 09:30 PM

What are the specs for your engine Mick?

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#127 _Dansthemanow_

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Posted 23 October 2013 - 11:19 PM

I would select Micks kit any day over one of the old cut and shut ford crank type ones PERSONALLY.

Cheers.

Maybe it would be easier to use Micks kit.With the ford crank you need to have reliefs milled into the camshaft for conrod clearance, and grind some metal of the block, also for conrod clearance.Plus the crank itself is probably gonna be cheaper,as its an offset ground factory crank.

As far as the modified ford crank being problematic or prone to breakage,I dont think its gonna be an issue,and certainly not in a mild motor.The guy who originally engineered the ford crank conversion built 60 of those stroker cranks for customers starting around 1975.None of them ever failed at the interface between the holden and ford pieces.The ford crank is forged steel like some

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#128 _Dansthemanow_

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Posted 23 October 2013 - 11:29 PM

Also you need the sump modified for the ford crank.So in all there is a bit of extra expense to accomodate the extra long stroke.I was lucky that I got the crank,cam sump,rods,flywheel,balancer for 1000 bucks,because the previous owner built a brand new engine,then busted a standard piston and sold it all off to build a turbo motor.worked out good value for me.Not so good if you gotta pay for it all from pro-stroke.

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#129 _STRAIGHTLINEMICK_

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Posted 24 October 2013 - 09:15 AM

What are the specs for your engine Mick?

OK ,218ci ,10.7 c/r ,mid 240's @.050 flat tappet cam , ported 12 port iron head ,3 x 2" SU's on a modified Armours,pacemaker 5008 with 2 1/2 " outlet ,far from ideal combination for racing but perfect for street/strip/hoon . It was the first stroker test engine.

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#130 Steve TPF

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Posted 24 October 2013 - 07:11 PM

Interesting. Why did you go with the SU's instead of Holleys/Webbers?

Roughly what power, and at what revs? What's it like in the low/midrange?

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#131 _Bomber Watson_

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Posted 24 October 2013 - 07:22 PM

I'll get in before an intelligible answer comes along....

SU's are the best. All others follow far behind, Webbers are expensive to buy and tune and dont make any more hp, Holleys suffer from distribution problems.

And none of the above has the CV awesomeness. Carbied jap sports bikes run CV carbs for a reason.

Cheers.

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#132 TerrA LX

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Posted 24 October 2013 - 07:33 PM

SU's are the best. All others follow far behind, Webbers are expensive to buy and tune and dont make any more hp, Holleys on red 6's suffer from distribution problems.

Cheers.

Made ya look more intelligent, no thanx needed...

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#133 _Bomber Watson_

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Posted 24 October 2013 - 07:42 PM

For once, i shall utter Touch'e.

Because for once, you have bested me in this little game of chess/editing each others posts we share :tease:

Cheers.

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#134 TerrA LX

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Posted 24 October 2013 - 07:48 PM

*in a drunken slur* I love you man, it's those damn red 6's I detest.

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#135 rodomo

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Posted 24 October 2013 - 07:50 PM

This thread turned to shit when someone mentioned F@4D

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#136 _Bomber Watson_

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Posted 24 October 2013 - 08:04 PM

*in a drunken slur* I love you man, it's those damn red 6's that draws me to you, your superior knowlege of engines and henceforth preference of the most awesomely epic engine ever created makes me love you.

Fixed :driving:

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#137 TerrA LX

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Posted 24 October 2013 - 08:15 PM

Spose I better come up and tow that shitty 308 powered speed boat away for ya then?

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#138 _Bomber Watson_

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Posted 24 October 2013 - 08:28 PM

Its either being sold or getting an engine transplant lol, i've had all i can take with the v8's, stupid thing keeps breaking, cant handle the good old holden six footwork....

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#139 _STRAIGHTLINEMICK_

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Posted 24 October 2013 - 09:07 PM

I'll get in before an intelligible answer comes along....

SU's are the best. All others follow far behind, Webbers are expensive to buy and tune and dont make any more hp, Holleys suffer from distribution problems.

And none of the above has the CV awesomeness. Carbied jap sports bikes run CV carbs for a reason.

Cheers.

Bomber does sound intelligent . Actually i am using su's because i know them ,they are easy to tune and i already had them. One of my customers with the same combo in a vk sedan has pulled a 12.9 with webers on pump gas(i hate that).

To answer Steve peak power is 5800-6000rpm ,the low and midrange with SU's is awsome .I havnt dynoed with these carbs but i do know it makes 210 moroso hp at the track.

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#140 Steve TPF

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Posted 24 October 2013 - 09:14 PM

I'll get in before an intelligible answer comes along....

SU's are the best. All others follow far behind, Webbers are expensive to buy and tune and dont make any more hp, Holleys suffer from distribution problems.

And none of the above has the CV awesomeness. Carbied jap sports bikes run CV carbs for a reason.

Cheers.

I've always been impressed with the beautiful simplicity of the SU, and I've heard they are great through the rev range because of the CV. But they don't seem particularly popular which always made me wonder if I was misinformed.

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#141 _Bomber Watson_

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Posted 24 October 2013 - 09:15 PM

You dont pay enough attention to drag racing results then mate.

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#142 Steve TPF

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Posted 24 October 2013 - 09:20 PM

Bomber does sound intelligent . Actually i am using su's because i know them ,they are easy to tune and i already had them. One of my customers with the same combo in a vk sedan has pulled a 12.9 with webers on pump gas(i hate that).

To answer Steve peak power is 5800-6000rpm ,the low and midrange with SU's is awsome .I havnt dynoed with these carbs but i do know it makes 210 moroso hp at the track.

The above are good reasons to use the SU's! And the peak around 5800-6000 sounds like what I would be looking for, should have plenty or mid-range driveability.

Pardon my ignorance, but what do you mean by "Moroso hp"? I presume that's a calculation based on the /4 mile speed or time.

You dont pay enough attention to drag racing results then mate.

No I don't. I'm happy to be educated.

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#143 _Bomber Watson_

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Posted 24 October 2013 - 09:26 PM

Most the guys going fast run SU's. Warrenm, Greens Nice, couple of examples off this here site.

Moroso HP is HP calculated from the moroso slide rule, there are plenty of dissers but im a firm believer, if your car doesnt have a Moroso hp level then it has no hp level.

Cheers.

Edited by Bomber Watson, 24 October 2013 - 09:26 PM.

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#144 _STRAIGHTLINEMICK_

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Posted 24 October 2013 - 09:36 PM

Most the guys going fast run SU's. Warrenm, Greens Nice, couple of examples off this here site.

Moroso HP is HP calculated from the moroso slide rule, there are plenty of dissers but im a firm believer, if your car doesnt have a Moroso hp level then it has no hp level.

Cheers.

You might be able to goggle it.

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#145 warrenm

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Posted 25 October 2013 - 06:05 AM

I've always been impressed with the beautiful simplicity of the SU, and I've heard they are great through the rev range because of the CV. But they don't seem particularly popular which always made me wonder if I was misinformed.

The problem with SU's is that people are scared of them.

1. They of the opinion that they require tuning all the time.

2. Because there's 3 of them, so they use lots of fuel, which when tuned correctly is quite the opposite.

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#146 _oldjohnno_

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Posted 25 October 2013 - 07:58 AM

Its either being sold or getting an engine transplant lol, i've had all i can take with the v8's, stupid thing keeps breaking, cant handle the good old holden six footwork....

I'd love to see the ad on ebay - "For sale: 308 Holden motor. Runs well, only removed it because I'm upgrading to a 202"

It'd make a nice change.

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#147 _Ned Loh_

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Posted 25 October 2013 - 09:19 AM

there should be a weber vs. su thread, we can all say our bit, then just refer to it. one day...

(I've had both, but worked with the webers a lot more)

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#148 _oldjohnno_

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Posted 26 October 2013 - 06:39 AM

there should be a weber vs. su thread, we can all say our bit, then just refer to it. one day...

(I've had both, but worked with the webers a lot more)

Just hit the "Start New Topic" button Ned, and see what turns up. I think it would be interesting.

I tend to think of the carb as just being something that adds fuel to the air, not as a HP maker. I think the manifold is where the power comes from, and it's the carbs job to add fuel while not disrupting any of the good stuff that's happening in the manifold. To my mind the inlet tract (from valve to air cleaner) is the centre of the engines universe around which everything else revolves. It's what ultimately determines the engines performance, and it's the one thing that everything else should be designed and selected around.

And maybe we should consider other carbs besides Webers and SUs - Holleys are a perfectly good carb too; it's just that no-one makes a decent manifold. But I suspect that three 7448s on a plenum-ram would make a killer drag race setup.

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#149 _STRAIGHTLINEMICK_

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Posted 26 October 2013 - 10:08 AM

The holley made just as much top end power as the 2"SU'S but bottom end was nowere near as good . Like johnno said its the Manifold , I was testing a new manifold jointly developed with aussie speed which ran 3 tenths better thany previous 4bbl manifold (i have one left if anybody wants one )

The SU's turned it into a pussycat with decent idle ,bags of torque and instant , violent response .

And still more tuning to go .