5.3 LS 996 Vs GT3 - Performance

I have this setup to start playing from when the driving stuff starts (I don't and can't figure it out, jump to 55:40) but earlier in the video this LS swapped .1 weighed 2937 LBS full fluids ready to rip with a 62% rear bias. I looked at my car's rear bias when it weighed 2968 LBS and it was 62%. Despite what is often claimed, no weight penalty here. Spoiler, it smokes the GT3 on the autocross too so I am excited to hear about how the COG change is so detrimental which has been a laughable assumption made by people. Double spoiler, 4 seconds FLAT 0-60 MPH with a 25 year old 911 thanks to a 5.3 truck motor, bonkers. You Tube

Great video. Very cool to see what can be built with not spending a ton of money. Tony's 996 is an amazing car for the dollar. Really well done and those numbers are wild. Its a rowdy beast of a car that has the performance to back it up. It doesn't really compare to the GT3, two entirely different animals. I just had my friend's 2004 996 GT3, with 997 ceramic brake, manual, the full manthey k410 kit, and KWs, for the past few days. Amazing amazing car for sure. The engine sound, power, and those BRAKES. Incredible. But then I jumped back in my car. I like them both. Just different. If the prices were the same, GT3 all day every day. But, is it worth the $80k difference in price? Maybe. I'm not sure. But I will still dream of owning one. Guards red and E88s. Can't get much better than that.

I must admit that the V8 sounds awesome! Interesting video. Thanks for posting. Missing part for me was they should have put the main dude in the GT3 for a few laps of the "AutoX" course. Driver experience makes a big difference in that situation.

Quotes source post: 19691048

Agree 100%

I like that guy a lot, and his work on the 'Powerkraut' has been fun to follow. This particular test though really only demonstrated one thing to me; the LS has more low end torque than a 3.6 Mezger. 0-100 (or 5-100?) runs might have had a closer outcome. Autocross favors that bottom end torque as well, allowing the driver to punch up quick speed between corners. I kinda think the GT3 guy wasn't too keen on flogging the whee out of his car as well. Can't blame him. I don't quite get why Powerkraut's brakes were toast after 3 60-0 stops. Maybe they had crap brake fluid in there? (I didn't watch every minute of the earlier stuff.)

Should have let me be the gt3ish test mule. I would have got closer to the ls times.

That was my gt3 in the video and me attempting to drive on a really small course. 2 seconds slower vs very seasoned pro driver doesnt upset me. I easily lost that in braking too soon on the straight. I offered to let Tony drive it on the little track but he declined. It was very tight with zero runoff, at the end of the short straight there was a fence. And the surface was pretty beat and slick. We were there all day and going pretty hard. A lot of things going on to get everything done and make the content. We got shorted on the big track due to the exotic car rental event. Tony and crew were an awesome bunch of guys and we laughed and had a great time all day. That LS hits hard from down low. A roll race would of been fun but it was getting late.

I'd say point here is bang for the buck

Two different cars. Depends on what you want. My guess is both cars are fun!

Quotes source post: 19692072

Truth of the matter for me is.... I don't really care how the GT3 performed and I think its inclusion was to help draw viewers. I LOVE the GT3 and the mez motors and it's clear in the videos, Tony is a G D wheel man, I wouldn't want to compete against him if my car had double the power of his. Additionally, for the owner that posted in here, your car is sick, the polished wheels and red paint, perfect. For me the eye raising take away is the performance you can get out of a 996 Carrera with this swap and what 400WHP does in a 996. 4.0 second 0-60, right at home on an autocross'ish and most importantly, everyone who drove or rode in it looked like they were having A LOT more fun than they would in a stock 996.

Quotes source post: 19691941

Awesome job and thanks for helping out with the comparison. Love your GT3 (and color), but I'm a bit biased. ​​​​​​​

Great video. You can hear purists grumbling under their breath learning an LSx swapped car is lighter than a factory issued Porsche powerplant car. "But....but......" No buts.

Great video comparison but I would love to know real world costs for a total plug and play scenario on the LS I feel that the price gap would be closer with a tech rebuild in an ordinary 996 but maybe not the performance gap

Displacement has its benefits when it comes to torque. The sub-three thousand weight is damn impressive.

Quotes source post: 19692494

Sell a working M96 - I got $10.2K for mine and do the below. If you're going to pay someone else to do it I would add $10K, Originally Posted by zbomb 5.3 Iron LM7 $850 - 5.3 Alum LM4 $1500 - 6.2 Alum L92 $2000 LS3 style intake manifold, fuel rail, injectors - $700 Front sump oil pan $500 Accessory stuff - $500 DIY Intake - $250 Headers - $200 DIY Exhaust - $800 Motor mounts, trans adapter - $1950 Clutch/FW - $1883 Air conditioning plug and play with factory lines - $750 Electric power steering - $1000 Plug and Play ECU/Harness - $3000 (this can be done for cheaper if you do your own wiring, this is a P&P solution with full OEM functionality retained) Cam/Valve springs - $800 (optional, but you should if you like to party) Porsche DWB Pedal - Free, if you do this I'll send you mine A bunch of this stuff could be done cheaper (wiring, electric PS) depending on your level of handiness and how much research you're willing to do, or more expensive. I would set aside $1K-$2K aside on top of this for misc stuff. Tony would have done the swap for a lot less money than I relay above.

So @$29k with "just in case" $$ thrown in and professional conversion. Minus the M96 running take-out of approx $10k...so @$19k. Right? Not all that bad!

Entertaining video on several levels, I hope everyone who wants a car like the white one will just go ahead and do it...I'll help with the math.. If you have a 996/997 and have a healthy engine right now you can get about $10k for it on the market.....Chavis will do you a Swap just like the white car except finished for $40k...Actually Chavis helped or did most of that one...So you will only be out about $30K and have it right away with no fuss and the best job availible ...Just get it out of your system if you are lusting for this.. If you want a replica of Zbomb Confused 996 im sure Chavis can do that also after the swap he can add some Track Focused goodies like roll bars, strip/gut/lighten it, track focused suspension/wheels/tires...electronics...dry sump.....aero ...body mods..all for maybe $80k-$100k..... Of course if you do the labor yourself you wont have to lay out all that cash but don't think you time costs nothing, figure your own worth at least $25 and hour to be above min wage, so if you got few hundered hours to spare it can save you thousands and thousands... Remember all these cars were $80-$100 cars when they were brand spanking new...and if they were produced new again right now they would be over $100k I really don't think much about the $$$, but I know most people do... I'm defiantly not a Purest I have modified.every car I have ever owned some to a great great extent..I am an aspiring Perfectionist so I will never be satisfied because nothing is ever perfect... That why I am ot a fan of swapped car...they are usually always less perfect..As to 50 year Dealer Technician one of the goals in working on any car any Brand is when you are done working on it," no one can tell ". How would you like your brand new $100k car to be worked on everyone could easily see that it had been worked on ?? No.. I feel the same about modifications, they should not stick out like a sore thumb but should blend in when ever possible...That's the way I developed the UAOS was to blend in but improve performance dramatically.. Yeah anyway if you have a 996/7 you have a car just like the white one for $30K and never beak a sweat and even help out the community by offering up your healthy engine..and if enough people do this maybe it will drive the cost on engines down...I remember when you could get a new complete OEM M96 X51 for $6895 and no core charge...Porsche had an abundance of them built up...Now it cost more than that for unknown health used one with lots of miles..

Chavis supplied parts for this build, to say he did everything is indicative of your ignorance on this particular build. Watch the build series, it's not a matter of conjecture. Perfectionist... Ha ! Additionally, while Chavis does builds, I would not have him do one for me or necessarily recommend him to do one for anyone else. While he has done a good job commercializing this swap, the reality is, with his swap electronics, it's just not that hard. A few hundred hours for a street car swap is absolutely absurd, ask @De Jeeper or @theprf who I would guess have a lot more experience around a 996 swap than you (which I'm guessing is none based on what you wrote above). I'm confident if you gave @De Jeeper all the parts required and an engine ready to go in, he could have the full swap accomplished in a long weekend and the only way you would know it every happened when you turn the key is the sound coming out of the exhaust... For people looking into this, don't be scared anymore - there is good support and the components have matured to a level putting this at a legit DIY level. ****, watch Tony;s videos and you're a good way there. Now if you decide to be like me and rebuild the motor, plumb a dry sump, custom cooling system, full chassis rewire, like not a stock wire in the car - Yeah, it takes time to engineer that stuff in a one off manner, But, if it's for a fun car to rip on the road, none of that work is required.

I couldn't get past the coil- over swap on the video....it was entertaining but as an "aspiring" perfectionist, his clumsiness on the strut and bake pad installation was more than I could stand.. I was going by what Chavis and others said in the "Swapped Porsche" FB page about the build on the white car and that Chavis ( aka CPE ) supplied all the parts and oversaw the build and gave invaluable help to the build.. If you know of someone else who could/would do the build as good or better AND expensive than CPE/Chavis I'm sure those who are interested in this sort of this would like to know... The white car wasn't finished at least as far as I got in the video when he was driving it... he said so himself... It has been said several times in CPE/Chavis FB page that the cost is about $40K tun-key and that gives a new engine with 2 year warranty....Yes there is a lot of support for thee kinds of adaptions and if you DIY you will certainly need it.. Not trying to dissuade anyone who has their heart set of this adaption, life is to short, just do it and get it out of your system, you may be hooked for life but then again you want to get back to a more "factory build"..

Quotes source post: 19693080

Hows the kit from that shop in Las Vegas,,, think its Renegade Hybrids. Read a while back they do a turn key if you supply the LS engine for 25K. And even have a smog legal E-Rod version available...

Quotes source post: 19693122

Ya, Tony wasn't ready for the 996 pads to not pull right out...lol. At least he didn't edit that out and showed his real world experience. That brake job was wonky for sure. Unless they just didn't show rotor change, brake fluid flush, and bedding in the pads before a race. no wonder 3, 60mph stops produced brake fade.... And the coil over job was a Porsche learning experience for him. But i like him and his show. Was good to see a less than perfectionist can get this swap going without to much cash, expertise, and effort.

You can LS swap a 996 for around $15-20k. The adapter and clutch are around $2300 depending on where you buy it. There�s some companies like Kennedy Engineering that have been making them for a while. Avoid the others, it�s just rebranded or copied garbage. The aluminum LS variants are around 80lb lighter than the iron blocks and typically 60-100lb lighter than the M96 depending on exhaust. I couldn�t tell the difference in performance between my LS1 swapped 996 and the multiple other 996 and 997 cars with equal or more power. I will say the torque in my car is ridiculous and addictive. This was a cool comparison video and I�d like to see a more equal comparison with same drivers. Still, like others have said, it�s definitely a bang for buck thing and I�d still love a GT car.

Quotes source posts: 19693080, 19693122

Well said. Anyone can swap these cars. A guy from New Jersey that was previously just installing home camera and alarm systems started swapping these cars in his parent�s garage and taking credit for other people�s hard work in the process. While Chavis claims these swaps take tons of hours, the reality is they just don�t. You can do the majority of the swap in one long weekend. Sell your M96 for $10k and buy a LS3 crate engine complete with harness and CPU from GM. Spend your remaining $5-10k on adapter, clutch, fittings, and exhaust. If you have a 996.2, just buy your wiring harness from Wiring Specialties direct. They came up with that harness, not Tyler. Andrew Stowell came up with the adapter that CPE sells and Tyler bought Andrew�s company, Stuttgart Muscle. Kennedy makes an adapter that actually has support from engineers. Buy that one instead. It�s a standard stage 2 996 clutch used in all the conversions. Convert to the GT3 electric hydraulic power steering. It�s easy. Tons of kits and refurbed pumps available. Exhaust is easy too. I make the 180 headers for these conversions just to make it even easier. Run a front sump LS oil pan. Go for DBW and you can even use your 996 e-gas pedal. Seriously guys, it�s a very easy conversion. CPE sold him a few parts and did none of the work from what I saw in the videos, regardless of that FB posts claims from Tyler. Don�t believe everything you see from Tyler. There are many people that aren�t happy with their purchases and service from Tyler and CPE, some of them Rennlisters. For most people it�s not worth the hassle of Tyler harassing them for speaking the truth. Apologies if this is off topic but I get tired of people believing the lies. The truth is these swaps are incredibly easy, cheaper than the $40k price tag by about half ($20k), and don�t take nearly as long as the swap shops want you to believe. What�s that saying? There�s a sucker born every day�

Is it possible to run the LS3 with a cable throttle?

Quotes source post: 19693294

Yes, very common and easy to do. You�d need to run a cable through the trans tunnel and connect to your pedal. I did this initially but DBW is much easier and has much better performance and response.

Ten years ago I swapped my 1999 c2 cabriolet with a ls1 .It has proven to be extremely reliable and a good quick point and squirt combination .As a highway cruiser the gearing is less than optimum .Albin offers a better ring and pinion combintion but hard to justify the cost . The hardest part of the swap was the ex haust-apparently there are now off the shelf kits . There are a lot of opinion's out there but suggest contacting users for facts .

Quotes source post: 19693248

I think Renegade only wants to do in-house conversions, I have no idea how much they cost, I did talk to them once, I will never talk to them again. The motor plate/mount I run is a Renegade part I got from @De Jeeper and it's fine, but nothing special. The CPE parts certainly look better, if there is any performance benefit, I have no idea. The nicest parts I got apart from the dry sump were from Kennedy Engineering, they do the trans adapter and FW/clutch and they were as good to work with as the parts were baller.

Yes, out of all the 30 swaps I have done, the 996 is easy. The only ones easier are the ones I have put into gm cars and trucks. My 996 swaps were more complicated with an automatic swap and the twin turbo narrow ls swap. The straight manual swap with a Kennedy adapter was easy with a normally aspirated engine, dry sump is a real need.