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Posted by: yarin Jun 5 2003, 10:38 PM

2.0L case
2.0L heads
Chevy V8 pistons and cylinders (105mm)
2.5L final displacement
8-8.5:1 compression
P&P, 3 angle.

Has anyone ever heard of a Type IV with mixed components like this?

This means the engine wasn't stroked, only bored. I'm assuming with a thicker cylinder wall heat dissipation won't be as bad as an original bore only 2.5l type IV.

Comments? http://www.strictlyvw.com/ built this engine. I know that a LOT of machining must have gone into this.

Posted by: LvSteveH Jun 6 2003, 09:31 AM

I wish this topic came up a week ago. I just traded off an engine I've had for a couple years. It was a 2580 type 4, had a stock case, opened up to accommodate larger pistons, 1.8L heads ported and polished with 38mm exhaust and 48mm Intake valves, 76mm stroke on a stock 2.0L crank that was reworked and fully counterweighted, 104 or 105mm TRW forged chevy 350 pistons in Biral (forged aluminum finned) cylinders. It ran with dual weber 44's. I know it was built some time ago, and when I got it, it ran, but needed a rod bearing, so I disassembled it and put everything into boxes awaiting a rebuild. The crank and rod setup were a bit crude. The rods were stock 2.0L that were ground at the base for clearance, all the way up into the rod bolts, and a substantial amount was taken out of the bolt heads for clearance. Didn't look pretty at all.
Of course everyone knows that a big type 4 can cost $6-7K easily, so I thought I hit the jackpot, but the more I saw the stuff from Raby’s Aircooled Technology and other high end builders I doubted the integrity of the engine. It should have produced around 200hp easily. I’m a bit of a perfectionist and that got the better of me, I traded it off for a few boxes of nice 914 stuff like seals, lenses, mirrors, a set of old weber 40’s, and such a few days ago. After doing the math, I probably didn’t come out that great, I’d guess around $1200-1500. In hindsight, I should have kept the case, cylinders, heads, and carbs, got a new crank and rods and properly clearanced the case. Then I would have had a pretty nice engine for around $3000 based on the value of what I traded it off for. Such is life. I don’t know if that helps you much, but at least it does confirm that such things exist. Good luck.

Steve

Posted by: seanery Jun 6 2003, 10:30 AM

one question....where did they get the cylinders? Chebby's are built into the block.

Posted by: aufaber Jun 6 2003, 10:53 AM

Odd.. chevy 350's have a 4" bore which is 101.6mm.

-Aaron G>

Posted by: Mueller Jun 6 2003, 11:46 AM

Brad has (or had) two 2.3+ liter /4's...they had aluminum cylinders (Mahle I am pretty sure was cast on them)

So I am guessing that modified 911 /6 cylinders can be used.

Posted by: Aaron Cox Jun 6 2003, 04:47 PM

i think bernie bergmann vw mixes chebby components with vw type 4 stuff. i have heard of mixing journals and rods....i dunno how you take the cylinders

Posted by: airsix Jun 6 2003, 04:54 PM

Posted by: LvSteveH Jun 6 2003, 05:46 PM

Of course “Chevy 350” pistons can be purchased in a variety of overbore sizes, such as .020, .030, all the way up to .080 I believe. I just looked up the specs, my pistons said TRW and JE230 on them and measured 104mm. That coupled with the 76mm stroke netted 2580cc’s. I don’t know who made the cylinders, but they were beautiful, very thick steel walls, approaching ¼ inch, and heavy 1/8 forged aluminum fins that were very clean and sharp, like you see on some racing engines. All this talk is making me wish I didn’t trade it off, maybe I could get it back, what would I have to give up? Hmmmm

Steve