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Engine Swaps Discussion of engine swaps. |
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04-10-2019, 02:12 PM | #71 | |
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Iron block vs aluminum. Aluminum manifold vs plastic. 6 vs 4 cylinders. One of the beefiest 6speeds ever versus one of the weakest. Twin turbo system vs NA. This isn’t adding the FMIC and piping or larger radiator of course, but still that seems low.
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04-10-2019, 02:23 PM | #72 | |
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And two heads vs one, four cams vs two (plus all associated hardware), timing chain vs timing belt. Boxers are very heavy for aluminum 4 cylinders... I'm just using published weights found online. My original point was that it's definitely more than a 70lb weight difference, wasn't arguing it's a light engine. Digging further, it seems that maybe the 594 is without gearbox. I'm finding sites claiming 594 with gearbox and others claiming 750ish with gearbox.
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04-10-2019, 02:54 PM | #73 |
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I always saw it as almost 600lbs (590's) WITHOUT transmission.
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04-10-2019, 03:15 PM | #74 | |
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04-10-2019, 06:27 PM | #75 |
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For shits and giggles, here's how a Synergy V8 sits, in comparison:
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04-10-2019, 07:25 PM | #76 |
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What’s the displacement on that one? That motor would be nice for this chassis, but way too expensive. What transmission do people run with those?
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04-11-2019, 11:12 AM | #77 |
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04-11-2019, 11:28 AM | #78 | |
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Is that a stroked or overbored zx14r? So they make an adapter or custom bellhousing? Do transmissions have limits on rpms? Like a 1:1 gear would spin equal to the engine, and the first gear would spin a lot less, but final gear would spin more than the engine, and I didn't know if a car with a 12k-15k redline needed a special transmission to handle those rpms, sustained or hot. At minimal, I feel like heat buildup could be an issue.
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04-11-2019, 01:07 PM | #79 | |
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I believe it is a little bit of both. It's a custom cylinder block. Pretty much the only OEM Kawasaki parts are the head castings, throttle bodies, and a few other things.
They designed these particular billet blocks to bolt right up to the OEM transmission. They can modify the design to bolt up to anything they want. Quote:
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04-16-2019, 09:18 AM | #80 | |||
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Additionally it seems conservatively less than 50 lbs are gained from the swap (and weight closer to the center of the car) when compared to a S/C kit (I/C and piping up front, etc.) probably even less gained when compared to a turbo kit. I say it's good hard data that can give confidence to anyone considering swapping that you won't just destroy the car handling characteristics. Of course, not all engines are LSs and this doesn't mean the car handles absolutely the same as stock, but it gives a good idea that you're not drastically changing it. Quote:
Quote:
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04-16-2019, 01:59 PM | #81 | |
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Of course, more weight can be added to the rear of the car by upgrading the differential, etc. I don't think the surge tank or other rear mods this guy did added much to the rear (did he do a diff swap/upgrade?). Jacking up the front suspension to corner balance the rear will give an even footing, but it doesn't change the moment of inertia. For instance, a Cayman and a Carrera could both have a 50/50 weight distribution, but the Carrera would have more weight further from the center of mass being a rear mounted engine versus the Cayman's mid mounted engine. This is the big argument with the 2jz besides absolute weight gain. They said they were able to cross balance the car to 50/50 without jacking up the suspension to weird heights/angles, which is good, but that doesn't mean the car is balanced 50/50 left to right or front to back just because cross balance was 50/50 (but they probably did those too the best they could, just saying), nor like I said above, does it mean weight wasn't displaced away from the center of mass or up higher than stock.
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04-16-2019, 02:01 PM | #82 |
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Yes, I'm not in any way saying this is equivalent to stock handling or better, I'm just saying the handling is not destroyed. I can personally attest to it based on before and after driving.
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04-16-2019, 02:39 PM | #83 |
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Fun fact. The dude that started this thread never did the swap.
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04-16-2019, 04:36 PM | #84 |
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I will defer to your guys expertise but I got the 56-44 numbers from Vorshlag but now looking back at it that was a modified car with a turbo kit. If anyone has pictures of a stock car getting a corner balance I'd love to see the weight and front to rear distribution. If it really is 53 front 47 rear from the factory I'd say that is impressive.
Here is mine for reference with fuel and a 225 lb driver. It's really hard for me to believe that this swap is going to negatively effect handling more than a turbo kit or TVS supercharger. When you get a good look in my engine bay and see how low and far back the LS sits. Then you factor in that I think the majority of the weight gain is in the trans not the engine which shouldn't hurt the handling or COG. I am expecting the handling to be effected but not as much as you'd think. I will get some drivers behind the wheel who are more sensitive to handling dynamics than I am to try and get a true unbiased opinion on whether I "ruined my car". |
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