ZeroDCX Posted February 22, 2005 Report Share Posted February 22, 2005 http://www.bonnevilleclub.com/forum/viewtopic.php?t=22691&postdays=0&postorder=asc&start=0 Quote Link to comment Share on other sites More sharing options...
DiscoStudd Posted February 22, 2005 Report Share Posted February 22, 2005 So yeah, I'm going to have to sift through all 9 pages when I have time, but the gist of it is that all of these L27 hop-up parts are from Australia? And to think, I was seriously considering swapping in an L36 in place of my L27 due to there being more of an aftermarket (I probably still will anyway.) Quickly, where does one seek info on purchasing the cam and rockers (and possibly the stroker kit) ? My curiosity is at least piqued... Quote Link to comment Share on other sites More sharing options...
ZeroDCX Posted February 23, 2005 Author Report Share Posted February 23, 2005 Don't know ... I was trying to find that out myself. Quote Link to comment Share on other sites More sharing options...
mfewtrail Posted February 27, 2005 Report Share Posted February 27, 2005 Good to see some Series I parts out there. I assume those camshafts are made from new blanks and aren't regrinds(as some guy on clubgp can get you a reground stock cam for a little over $100). BTW, Disco(or anyone else), do you happen to know the stock rocker arm ratio for the series I engines? Judging by valve lift specs in repair manuals, I'm almost certain they have 1.6:1's. If this is the case, the rockers alone would provide an increase of .030'' lift on the intake side and .0306'' increase on the exhaust side. Should make a noticeable difference and wake the car up a little more on the highway. For what it's worth, repair manuals list the following info for the series I. Camshaft lobe lift: Intake = .250'' Exhaust = .255'' W/ the stock 1.6:1 ratio(multiply lobe lift times rocker ratio... example: .250 x 1.6), you have .400'' on the intake side and .408'' on the exhaust. Now w/ the 1.72:1 ratio, the intake would now be at .430'' lift and the exhaust at .4386'' Keep in mind that you'll probably want to upgrade the rest of your valvetrain if you when swapping in a cam/rockers. Almost forgot, do either of you have ALL the specs on the stock camshafts? I've looked in various places and only came up with the lobe lift of the cam. Quote Link to comment Share on other sites More sharing options...
DiscoStudd Posted February 27, 2005 Report Share Posted February 27, 2005 I have owned 2 L27's and actually have no clue on the stock cam specs or rocker arm ratio. I've always viewed that motor as the L36's Red-Headed Stepchild since there were no hop-up parts available. I am kind of intrigued by the new found availability of cams and rockers. Honestly I think if I were to yank my motor, with the amount of miles that are on it, I'd rather just pick up a low-mileage L36 and get a set of Stage 2 heads, GT1 cam, upgraded pushrods, 1.7 roller tip rockers, the upgraded upper plenum, and the "velocity" insert all from ZZPerformance. I've been told that the L36 will run just fine on the L27's OBD I PCM (plus there's more hi-po parts available, and the motor has more overall potential...) Quote Link to comment Share on other sites More sharing options...
ZeroDCX Posted February 28, 2005 Author Report Share Posted February 28, 2005 I have owned 2 L27's and actually have no clue on the stock cam specs or rocker arm ratio. I've always viewed that motor as the L36's Red-Headed Stepchild since there were no hop-up parts available. I am kind of intrigued by the new found availability of cams and rockers. Honestly I think if I were to yank my motor, with the amount of miles that are on it, I'd rather just pick up a low-mileage L36 and get a set of Stage 2 heads, GT1 cam, upgraded pushrods, 1.7 roller tip rockers, the upgraded upper plenum, and the "velocity" insert all from ZZPerformance. I've been told that the L36 will run just fine on the L27's OBD I PCM (plus there's more hi-po parts available, and the motor has more overall potential...) Hmm, seems like a good idea, but then I'd have to turbo the L36 ... Wonder how much boost the L27 can handle stock? They had a discussion on the Bonneville forum about boosting the L27, apparently they used to make a turbo kit for the Bonneville. It was a company called APV if I remember correctly. Quote Link to comment Share on other sites More sharing options...
mfewtrail Posted February 28, 2005 Report Share Posted February 28, 2005 Hmm, seems like a good idea, but then I'd have to turbo the L36 ... Wonder how much boost the L27 can handle stock? They had a discussion on the Bonneville forum about boosting the L27, apparently they used to make a turbo kit for the Bonneville. It was a company called APV if I remember correctly. I'm pretty sure the L27 can probably take a good 6-7psi of boost without a problem. I would like to experiment with a turbo on an L27 if I ever get a chance to do so(in stock form and upgraded). With some tuning and supporting modifications, I think the Series I's would be like a slightly toned down version of the Series II's that are turbocharged now. Quote Link to comment Share on other sites More sharing options...
ZeroDCX Posted February 28, 2005 Author Report Share Posted February 28, 2005 As a rough estimate, How much power/torque would that equal to from stock? I know that It depends to what size and trim turbo that is used, but it intrigues me. I might have to try it, the engine says "Yes" but the 4T60-E says "Hell No!" Quote Link to comment Share on other sites More sharing options...
mfewtrail Posted February 28, 2005 Report Share Posted February 28, 2005 With 7psi from a decent turbocharger w/ it intercooled I'd bet it would be in the neighborhood of 250hp and somewhere around 300 ft-lbs of torque(crank/engine). Just a guesstimate though. Someone else can probably chime in with some turbo sizing info(I would assume that we would want something slightly smaller then the basic 97-03 L36 turbo kit(uses a "P Trim" T04B Garrett turbocharger if I'm remembering right, not sure on all the specs though...there are a couple of different options with the turbo size). A smaller turbo would do if you only want to get similar numbers to my guesstimate, I personally would want something capable of supporting a good bit of power w/ future upgrades. Quote Link to comment Share on other sites More sharing options...
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