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The discussion here about the cylinders on the M96 going oval over time made me think about this old design from the late 70's ... The cylinders don't have to be perfectly round BUT they do have to SEAL . That's why I designed the Blow-by Test for M96 found here only on Rennlist...
The cylinders do start to go oval after time on the M96 but the rings also go oval to keep the seal. That's why you can't just throw in a new set of rings on an old cylinder, you would be better off reusing the old rings that are fitted to the cylinder, the new rings will not seal on an ovaled cylinder..To install new (round) rings you have to correct the cylinder...
This engine design was a 500cc V4 with 32 valves designed by Honda to race in GP motorcycles...The rules stated it could have no more than 4 cylinders and the V4 two-strokes were dominating ....Honda was known for four-strokes and wanted to compete so they fudged the rules by creating this oval v4 with 8 valves per cylinder that had the air flow of a v8 to get more air in....Took them years to get the valve train and ring seal problems worked out.And they still got spanked by the two-strokes because the 4-stoke was 20kg heavier up high on the top of the cylinders and caused a higher center-of-gravity .....
But it was a Proof of Concept...and quite impressive..
Potentially silly question, would a vortec 8.1L fit? Is that substantially larger than the 5.3 externally?
Not sure if it will fit.
8.1 is a big block, not a LS.
Seems the biggest LS most swap in a 996 is the 6.2 LS. LS aluminum block type engines are the most swapped engine to go in a 996, with the most support and install kits/parts by far.
An easy.500 HP engine.
. Just like Zbomb's LS 3 that probably puts out 550chp naturally aspirated. Although Zbomb's is not a simple swap. Its set up for the track with a sweet dry sump system + many other details his build thread here details. You should read it...
Potentially silly question, would a vortec 8.1L fit? Is that substantially larger than the 5.3 externally?
I can't tell you it won't fit as I have never heard of anyone trying it, my thought is no. I can say, none of the stuff I listed would support such an effort.
Ok so just looking more heavily in to the 3.2 swap and wanted to clarify, it looks like there are a couple of versions a 250-260hp earlier one and the 05-06 one that makes 280hp.
obviously more power is preferred especially since I’d be taking a cut regardless just wondering if both versions plug right in to the 911 computer and are truly plug and play or if there are any electronic alterations (different ecu?) needed for either option. Also wondering if my 2000 is a drive by wire or not/ how to easily check.
Used 3.2 prices on eBay including freight are currently about $5500 for the 05-06 and around
$4500 for the earlier 00-02 for 100k examples
I also saw a 3.4 in a crashed 911 with 216k on it listed at $7000 which seems extremely steep to me for such high miles. I called and they said ther bottom was 6k shipped. This puts it almost even with a 100k 3.2 but trying to determine how scared I should be of that 216k mileage, I would think very scared but I’d like opinions anyway. This swap would probably be a temporary measure until I pull together the time and money for something more drastic in the future
Ok so just looking more heavily in to the 3.2 swap and wanted to clarify, it looks like there are a couple of versions a 250-260hp earlier one and the 05-06 one that makes 280hp.
obviously more power is preferred especially since I’d be taking a cut regardless just wondering if both versions plug right in to the 911 computer and are truly plug and play or if there are any electronic alterations (different ecu?) needed for either option. Also wondering if my 2000 is a drive by wire or not/ how to easily check.
Used 3.2 prices on eBay including freight are currently about $5500 for the 05-06 and around
$4500 for the earlier 00-02 for 100k examples
I also saw a 3.4 in a crashed 911 with 216k on it listed at $7000 which seems extremely steep to me for such high miles. I called and they said ther bottom was 6k shipped. This puts it almost even with a 100k 3.2 but trying to determine how scared I should be of that 216k mileage, I would think very scared but I’d like opinions anyway. This swap would probably be a temporary measure until I pull together the time and money for something more drastic in the future
I have gotten many parts from this place. Very reasonable to deal with.
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