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Go Back   3800Pro.com Forum > Engine > Bottom End

Bottom End Discussions regarding blocks, cranks, rods, flexplates, oiling system, etc...

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Old 12-29-2004, 04:21 AM
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4.3l stroker..whats it gonna take?

Hey some of you here probably recognize me from BonnevilleClub.com, for the others "HI!" Greatings aside, figured I should ask here since..well..where better?

As my sig says I have a 1993 SSEI that I've been doing work to for quite some time now. I had a horrible dream that I'm sure I share with plenty here; throwing a rod. I figured it was time to upgrade them, and the pistons, and I figured while I'm at it why not the crank. Then came the whole stroker idea. I've managed to locate a 4.3l stroker crank and a shop to do the work but I'm wondering if there are any 3800 specific things to keep in mind. This will be the first I've dealt with stroking a motor and I trust the shop doing the work but I'd like to walk in knowing of potential problems or possible 3800 specific issues. Things like clearance, balancing issues, potential pcm issues etc...

As far as I know this will be the first of its kind in America, in a SI l67, and in a '93 Bonneville. So it might be fruitless to even ask, but heck its worth a shot.

Any helpful info is appreciated.
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Old 12-29-2004, 08:27 AM
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I'm not that familiar with the Series I engines. Why don't you shoot ZZP an email? They currently have a 4.3L stroker kit for the Series II engines.
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Old 12-29-2004, 09:01 AM
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If they're off set grinding the crank I'd be kinda scared if you're gonna be making alot of power and/or spinning up the rpms.
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Old 12-29-2004, 07:39 PM
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I am not familiar with all the details on the Series I engines, but Series II/III engines can only be stroked to ~ 3.62" (stock is 3.40"), giving you closer to 4.0 liters than 4.3 liters. This limitation is because the deck height is shorter than on the eralier 3.8 liter engines.
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Old 12-29-2004, 10:07 PM
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Quote:
Originally Posted by seen96
If they're off set grinding the crank I'd be kinda scared if you're gonna be making alot of power and/or spinning up the rpms.

Yeah, I think ZZP only recommends them in an N/A application because they cant handle much power due to the way the crank is ground.

Correct me if Im wrong.

Scott
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Old 12-30-2004, 09:02 AM
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Isn't it possible to go with a custom piston to move the piston pin up towards the crown, and go with a longer con rod? This would be ideal to make more power at high revs over a stroked configuration.
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Old 01-14-2005, 11:27 PM
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Quote:
Originally Posted by Mr. INTENSE
I am not familiar with all the details on the Series I engines, but Series II/III engines can only be stroked to ~ 3.62" (stock is 3.40"), giving you closer to 4.0 liters than 4.3 liters. This limitation is because the deck height is shorter than on the eralier 3.8 liter engines.
Yeah this was one of the changes in going from Series I to Series II. Being pre-95 I should be in good shape as far as that goes. This crank offers a 3.78" stroke giving about 4.26 with a .020" overbore.
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Old 01-15-2005, 05:44 AM
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Guys their is about to be a release of a stroker crank in OZ by C.O.M.E. racing. It's to suit the series II L67 / L36 which is our Holden Ecotec V6.

I'll give you the garble as follows and a pic.

Holden Ecotec V6 4.2 litre Stroker kits available soon

New for 2005 C.O.M.E Racing is now close to completing a full development program on a long awaited Holden Ecotec V6 4.2 litre Stroker crank, rod, piston kit assembly

Holden V6 owners will now be able to have all the advantages of a stroker engine so popular for most V8 engines families. The big advantage of course is that with the low insurance rates confronting V6 owners there will be less need to convert to the more expensive V8 alternatives.

Our development program has already seen the building of totally streetable Ecotec V6 Strokers with ported cylinder heads and matching camshaft and software upgrades to easily yeild 220KW (295HP) V6's with awesome torque increases for V8 style acceleration.

Shown in the photo is our final production nodular cast iron stroker crankshaft and our prototype forged 5140 steel matched conrod. The assembly is designed as a direct bolt in with no block modifications required and the ability to retain the OEM style production pistons. We will be offering the cranks only, cranks and rods only as well as complete crank, rod and cast piston balanced assemblies. There will be optional compression ratio cast pistons and forged piston options for Turbo, N2O or Blower applications.

We would like to wish all our customers and all automotive enthusiasts everywhere a healthy and safe 2005 and we will be back in our shop on the 10th January 2005.

In the meantime feel free to email us any queries you may have on our new Ecotec V6 upgrade program including software , camshaft and now our 4.2 litre stroker assemblies. Email to come@comeracing.com or call us after the 10th January 2005 on (03)9571-4204
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