AirSpeed VW Community Forums
Technical => Engine Tech Forum => Topic started by: neil68 on September 04, 2007, 07:31:07 PM
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Alan, or any others running 2332 cc type 1's:
In your current engine, are you using a crankshaft with VW journals or chevy size?
I'm looking at increasing my displacement to 2332, but would prefer to re-use my current 5.5\" H-beam rods (to stay within a reasonable budget). However, these rods have VW-sized journals, which would probably require some extra clearancing inside the case...I'm currently using a recent Brazilian mag case (three years old).
Thanks!
Neil :)
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Neil, Alan is using a Chev journal crank.
VW journals can be made to work, but it gets very very close. What rod bolts do your rods have, 5/16\" or 3/8\"? Who's rods are they?
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Hi Bruce,
I currently have CB Performance H-beams with 5/16\" ARP 2000 bolts (didn't feel the need for 3/8\" bolts with my current 2017 motor and only 131 HP at the wheels).
I may go with either 2175 or 2276 displacement for winter motor upgrade, if the 84 crank is not in the cards...
Thanks,
Neil.
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my 2276 has vw journals, and it got quite thin in the roof of the case, i would imagine that an 84 would be really close. imho i think the best thing to do is save up a bit more and buy an 84 with chev journals and get some scat h-beams to match...
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The rods you have may work with an 84 stroke VW journal crank. If you had 3/8\" bolts, they would not fit. I know that 5/16\" rod bolts in Eagle rods on an 84 stroke VW journal crank can be made to fit. Whether the CB rods are the same as Eagle is unknown to me.
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btw, my 2275 has the 3/8 bolts
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2332cc scat H beam 3/8\" bolts, 84mm DMS welded crank with chev (actually buick) rod journals. My case was done by rimco, I honestly didn't look at how close (thin) the clearancing was.
If your case is on it's last legs you could always go to a cb \"raised roof\" alum case to gain some room.
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Josh,
That's my dilemma. My mag case is only three years old, with fairly low mileage, tight lifter bores, standard mains, bluerprinted matching oil pump, the whole package is there and I could use slip-in 94's (90.5 case bore).
However, I can also get a raised-roof aluminum case for $600 CDN that's already cut for 94's and then pretty much drop in an 84 crank.
Thanks for the suggestions...
Neil.
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Thanks for the input. I placed my order today with Concept 1 for an 84 mm crankshaft with chevy journals and 5.5\" rods, so I'll go with a 2332 cc for next season.
It looks like the amount of clearancing that I've already done on the case for the current 78.4 x VW journal rods, will only require a bit more work to make the 84 x Chevy journal rods fit.
Also toying with replacing the current FK8 with an FK 10...
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but the k-8 is such a wicked cam!
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sell your rods, regrind to a chevy rod journal ,get it wedgematted at the same time,buy new rods.done
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I tried a K10 over a K8 a few years ago on a 2275 with no other changes and if I were you I would stick with the K8
Chow,
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I tried a K10 over a K8 a few years ago on a 2275 with no other changes and if I were you I would stick with the K8
Chow,
Speaking of case machining ........................................................
;)
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I tried a K10 over a K8 a few years ago on a 2275 with no other changes and if I were you I would stick with the K8
Chow,
but he's going up in displacement from a 2017 to 2332 so would that benifit from more cam? not that i'm questioning a real engine builder.........just wondering B)
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We have one or two more Friday-night street legal races here in Calgary and then I'm going to send my heads and manifolds to K-roc for some work. The heads are \"out-of-the-box\" CB 044 CNC oval-ports and the manifolds probably need some porting as well.
I will stay with the FK8 for now and then perhaps experiment with other cams later, if necessary. The FK8 is so nice for street driving, so that is certainly a plus :)