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Thread: 1968 Volkswagen Beetle 2.3L

  1. #1
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    Default 1968 Volkswagen Beetle 2.3L

    Here's my '68 Beetle Deluxe with a few mods:

    Stock motor was 1500 cc, but now has a bored & stroked 2332 cc, with Weber IDA's, hot street cam (Engle FK8), beefed transmission, headers and drag radials. Been racing at Race City and also Castrol Raceway, with best 1/4-mile of 13.156 seconds at 100+ MPH. Here's a few pics.
    M&H street legal drag radials:

    Race City Secret Street:

    Castrol Raceway Street Legals vs. Jeep SRT-8:

    Das Volks Show at Stanley Park:

    Interior:


    2332 cc with 48 Weber IDA's, MSD ignition, etc:
    Last edited by Neil68; 11-11-2008 at 12:53 AM.
    Neil
    '68 Beetle 2332 cc, 204 WHP
    12.5-second 1/4 mile

  2. #2
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    Default

    Added a roll bar from Ron Lummus Racing and installed the new Web 86C camshaft and Becker lifters. Hoping to run in the 12's this year:



    Neil
    '68 Beetle 2332 cc, 204 WHP
    12.5-second 1/4 mile

  3. #3
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    Default Update 2009

    Dynojet test at Concept 1 yesterday. Peak HP was 180.4 HP at ~6,000 rpms (versus 169.2 HP last year). Hoping the extra 11 HP will produce a high 12-second 1/4-mile pass this year. Will give it a try at Race City on Friday. Here's a dyno video:

    http://www.youtube.com/watch?v=FF2gCti3dro
    Neil
    '68 Beetle 2332 cc, 204 WHP
    12.5-second 1/4 mile

  4. #4
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    Default Castrol Raceway

    Went up to Edmonton on Friday, for the JB Power Street Legals at Castrol Raceway. Decided to drop the tire pressure to 17 lb. and also launch at 6,000+ rpms.

    Finally broke into the 12's with a best ET of 12.942 seconds at 104.27 MPH...60' time was 1.763 seconds...not my best, but not too bad with no burnout!
    Neil
    '68 Beetle 2332 cc, 204 WHP
    12.5-second 1/4 mile

  5. #5
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    Default New cylinder heads

    Just received my new cylinder heads from JPM. Now with 48 x 38 valves and should flow 25-30% more than the previous set:





    Neil
    '68 Beetle 2332 cc, 204 WHP
    12.5-second 1/4 mile

  6. #6
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    Default Update: manifolds

    Got the manifolds machined to clear the heads properly. Manifolds are from CB Performance, heads from JP Motorsports, so they didn't quite match at first.

    Manifolds are match ported to the Weber IDA's as well:



    Bevel edge to clear head castings:



    Cosworth style ports:
    Neil
    '68 Beetle 2332 cc, 204 WHP
    12.5-second 1/4 mile

  7. #7
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    Default Castrol Raceway

    Neil
    '68 Beetle 2332 cc, 204 WHP
    12.5-second 1/4 mile

  8. #8
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    Default dual valve springs

    Installed the dual Oteva 75 valve springs today. Concept 1 had the correct air-cooled VW head compressor, as my other spring tools would not apply sufficient pressure. These springs are real bruisers, so it took some effort to compress them properly and reinstall the keepers. Retainers are titanium and the dual springs are rated to 10,000 rpm and .700" lift, more than I'll be reving or lifting:



    Neil
    '68 Beetle 2332 cc, 204 WHP
    12.5-second 1/4 mile

  9. #9
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    Default Engine completed

    Finally got the linkage adjusted on the Weber IDA's and the manifolds clearanced, so everything fits with the shorter manifolds. Just need to install the engine and do some tuning:


    Neil
    '68 Beetle 2332 cc, 204 WHP
    12.5-second 1/4 mile

  10. #10
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    Default Update: engine testing

    Well, I finally got the engine installed and had to make some mods to the exhaust, carbs and linkage, as the new heads are a different size. My seat-of-the-pants judgement is that there's more power than with last year's heads. Hope to get to Race City on June 10th to test and tune. Here's a short video:

    http://www.youtube.com/watch?v=4vC5UhMWc7w
    Neil
    '68 Beetle 2332 cc, 204 WHP
    12.5-second 1/4 mile

  11. #11
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    Default Update: Mission Raceway

    Well, after getting poor results with the Web 226 camshaft, I installed my old 86C cam. Ran a 13.09 ET at Castrol, and then last Friday 12.812 seconds at 104.02 MPH at Mission Raceway. Here's a photo from Mission:

    Neil
    '68 Beetle 2332 cc, 204 WHP
    12.5-second 1/4 mile

  12. #12
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    Default New Camshaft

    Going to try a new camshaft from JPM for 2012:

    Neil
    '68 Beetle 2332 cc, 204 WHP
    12.5-second 1/4 mile

  13. #13
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    Default New Wheels

    Well, after racing with heavy steel wheels, I finally picked up some lighter spun aluminum wheels. They're 6" wide CMS rear and 3.5" Bogart on the front. Hopefully saving over 30 lbs on the set of four will gain a tenth or two on the 1/4-mile...not sure what the usual gain is:

    Neil
    '68 Beetle 2332 cc, 204 WHP
    12.5-second 1/4 mile

  14. #14
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    Default New ET

    Went out to Mission Raceway and clocked a 12.6-second ET at 106 MPH...that's a new best 1/4-mile time for the Beetle.

    Also, made another trip to Castrol Raceway and pulled out a 12.8 at 106 MPH, another best for that track.

    Still playing with the jetting on the Weber IDA's, so we'll see what happens this week...
    Neil
    '68 Beetle 2332 cc, 204 WHP
    12.5-second 1/4 mile

  15. #15
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    Default Weber IDA carb Tuning

    Ordered some new venturies for the Weber IDA carbs. These are from JPM in Sweden and should improve flow as well as dispensing with the stock auxiliary stacks. Also, should smooth out city driving. These are 44 mm venturies, which should work well with the 48 mm intake valves:

    Neil
    '68 Beetle 2332 cc, 204 WHP
    12.5-second 1/4 mile

  16. #16
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    Default Weber IDA venturies

    Here's a comparison of the stock Weber IDA venturies and the aftermarket JPM Raptor vents. The new vents replace both the stock venturi and the auxiliary stack:

    Neil
    '68 Beetle 2332 cc, 204 WHP
    12.5-second 1/4 mile

  17. #17
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    Default Update

    Had the Beetle on the Dynojet at Concept 1 for some carb tuning. We experimented with different Weber IDA jets and ignition timing. Came up with a best jetting combo of F2 emulsion tubes, 2.10 mm airs, 1.85 mm mains and 0.60 mm idles. Best run was 204 WHP with the 7500 rpm rev limiter. This was with 10:1 CR on 94 octane Petro-Canada. Will probably bump the CR up to 11:1 next, and maybe try mixing a bit of race fuel, if need be.

    Hoping to race at Central Alberta Raceway in Rimbey next, and also Castrol Raceway later this month (when the Street Legal's return).

    Here's a short video taking it up to 7500 rpm. The cam can handle more rpms, but I'll wait until I bump up the compression ratio next winter:
    http://tinypic.com/r/13ymbv9/8
    Last edited by Neil68; 09-05-2014 at 10:35 PM.
    Neil
    '68 Beetle 2332 cc, 204 WHP
    12.5-second 1/4 mile

  18. #18
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    Default Exhaust

    Had a lot of fun racing Street Legals at Medicine Hat, Rimbey (CAR) and Castrol Racway this summer. However, the Beetle is stuck in the high 12-second range for the 1/4-mile. Decided to upgrade the exhaust and bump up the CR, maybe port the heads...would love to run an 11.90 next year.

    Picked up this nice stepped header: it starts with 1 5/8" stainless steel pipes, then increases to 1 3/4" and finally to 2". My current header is simply 1 3/4" for the entire length and is a very basic economy merged header. The new JPM-CSP header has equal length pipes from all four cylinders and a quality pyramid at the collector. On a similar 2.3L engine, this header added 13.5 HP to the wheels, so I'm hoping for a similar improvement.

    Toying with the idea of adding a turbo, but I'm a diehard carb guy, so that will require some further thought:

    Last edited by Neil68; 10-25-2014 at 05:21 PM.
    Neil
    '68 Beetle 2332 cc, 204 WHP
    12.5-second 1/4 mile

  19. #19
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    Default 2332 cc engine

    Finally got around to installing the new stepped header. Had to do some cutting and welding to get the Magnaflow muffler setup to fit, and will also have to cut & weld the traction bar to fit. Here's how tight the header pipes fit, however, it had to be that way to get equal length pipes from all for cylinders:

    Neil
    '68 Beetle 2332 cc, 204 WHP
    12.5-second 1/4 mile

  20. #20
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    Default

    I've been using Manton chromoly pushrods in order to have sufficient strength at high valve spring pressure and rpms. However, in an air-cooled engine, the problem is that the aluminum heads and block expand as the engine warms up, but the steel pushrods do not expand (as much) thus creating a larger valve lash...and an annoying clatter in the valve train. Stock Beetles use aluminum pushrods, but they're only strong enough for stock or mild hi-po valve train.

    I researched the issue and found that there are several manufacturers now producing dual-tapered aluminum pushrods. I ended up buying the Logmech brand from Sweden: http://logmech.se/eng/products/engine/pushrods/

    Just need to cut these to size and install in time for the start of the Street Legal season:

    Neil
    '68 Beetle 2332 cc, 204 WHP
    12.5-second 1/4 mile

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