Newbie with some not so FAQs

[boostiality]

Originally Posted by mach schnell

I don't live to far from Pomona (yeah, I know, I'm not that excited about that fact either) - anyway, I passed by that area on the I-10 and believe it or not, saw an asian with a super tight mohawk/mullet driving a hot 78 Camaro with the back end jacked up atleast 4 feet. Ironic thing, it had a center exhaust and a Japatucky personalized license plate, wshiwasabox -

I think this whole thread is a scam by a schlitz drinking, luke duke loving Hemi hopper who's just trying to get a rise out of a bunch of guys who appreciate true automotive engineering and drive real cars!

Yeah well we cant all have fate smile upon us now can we? Your more then welcome to come see it when I have the appropraite funds to do it since your near. Besides, quote any one of my reponses where I got out of line inorder to get a rise out of people. Theres already enough sterotypes about boxster owners that I'm not even going to get into, so I would suggests not fueling them even more.

Btw, heres my recently sold 914


With matching Corvette 283

[986Jim]

I'm just not quite sure how an LS1 would fit. The motor and tras are quite long, I'm wondering how you would fit the rear end assembly in there as well. The drive shaft would be 3" long at best if it would all fit together. The boxster is basically like a FWD motor in the middle of the car, ie no rear end no drive shaft, just motor trans to a set of half shafts right out of the diff located inside the trans like a FWD car.

There really isn't much length to play with, I can see the motor and trans fitting in but the rear end would probablly touch the transmission not even allowing for a drive shaft to be fitted, there just isn't that much room for a long motor/rear end setup like that.

[Dr. Kill]

Why is everyone so down on this guy’s idea? No, it is not something that I would do, but I am all for innovation and creativity as long as it isn’t practiced on my car. It’s not like he voiced an opinion on concealed weapons carrying .

I don’t imagine the engine is going to be a perfect swap with no other mods required. This isn’t a two hour job, nor will it be cheap, but it can be done. Anything can be done.

This guy obviously has an interesting hobby and his own niche going on. He already did this successfully with a 914 and wants to take it to the next level of complexity, creativity, and performance.

Boostiality, you are breaking new ground here so it appears that there is little our forum can offer you in terms of direct experience with a similar project, but many of these guys (not me) do know quite a bit and will be able to provide you with great insight to specific challenges that you will face along the way.

Go for it man. Good luck, and please keep us posted.

[Brucelee]

I say go for it. I for one would love to be kept up to date on this.

Imagine an engine swap for the Box that doesn't cost $15G!

I have to admit that I like the fact that it will annoy the Porche intelligensia!

Imagine open the bonnet at a PCA meeting?


Hee hee!

[Finallygottaporsche]

post a pic of the mullet please

[chrisg]

Boostiality,
look what you started, you've opened up the 914club's box of motor swap debates !

Hell, unlike the teener, at least with the Box you don't have to mess with plumbing rads and you already have a tranny that can take some extra power.

[boostiality]

-986Jim

Hmm I think your looking at it the wrong way. I'm not trying to swap the t56 here along with the rear, its merely the motor alone. When we do it to the 914s, the only foreign thing that creates more length besides the motor is the adapter plate. which is only several inches. As for its orientation, the motor isnt horizontally mounted like the GSX, its just longitudinally mounted like say most of the worlds supercars. This is actually one of the big reasons why I like the chassis.

-Dr. Kill & BruceLee
I appreciate the support. I have alot of faith that it can be totally done under 10k actually. If you guys' want to check out some of the prices the Rx7/LS1 guys are paying for their swaps (also note we spend less b/c we're not going to buy and support the t56) check out www.hinsonsupercars.com. They even use the stock motor cradle, merely just modifying it with GM mounts and there you have it.

-Finallygottaporsche
Lol I dont have one now, but ironically I already did have the fau-hawk until recently

chrisg
Well great to see someone else with teener knowledge. And your right about the cooling part which just solves alot of headaches and would make the swap alot less complicated. If the 70s teener trannys can take basically 3x the amount of power and torque stock, I wonder what a late 90s boxster tranny can do

LS1 dimensions


Old SBC dimensions

[986Jim]

Okkk.. I wasn't sure how you were going to do the trans/rear end.

An adaptor plate with a custom clutch will work good. I made an adaptor plate for an Miata to run a full RX7 tranny rear end and drive shaft shop axels. We cut it from 1/2" aluminum and used threaded ARP bolts to each point.

THe clutch was a Miata flywheel and pressure plate with an RX7 spline in the miata disc. It was a pretty trick setup and held together well. The Miata made 476whp with a 50trim and spray, on 110octane. Pretty cool setup and the RX7 trans and rear end with a Kazz diff held up for 200+ passes down the track ~ 11.2-11.4.

My question would be then, I wonder how a 2.5L trans / axel setup would handle an LS1. The LS1 makes a lot of torque where the trans on the boxster is only technically designed for 200-220ft/lbs vs say 400. If you were to dump in a Quaife or Kazz it might work, then half shafts would become the next problem.

Another problem is the limited bellhousing size on the Boxster, again you will be stuck with a small sized clutch (whats the boxster? 225mm or so ish.. vs say 300? in an ls1?) which will take a lot of abuse from that motor.

[boostiality]

Originally Posted by 986Jim

Okkk.. I wasn't sure how you were going to do the trans/rear end.

An adaptor plate with a custom clutch will work good. I made an adaptor plate for an Miata to run a full RX7 tranny rear end and drive shaft shop axels. We cut it from 1/2" aluminum and used threaded ARP bolts to each point.

THe clutch was a Miata flywheel and pressure plate with an RX7 spline in the miata disc. It was a pretty trick setup and held together well. The Miata made 476whp with a 50trim and spray, on 110octane. Pretty cool setup and the RX7 trans and rear end with a Kazz diff held up for 200+ passes down the track ~ 11.2-11.4.

My question would be then, I wonder how a 2.5L trans / axel setup would handle an LS1. The LS1 makes a lot of torque where the trans on the boxster is only technically designed for 200-220ft/lbs vs say 400. If you were to dump in a Quaife or Kazz it might work, then half shafts would become the next problem.

Another problem is the limited bellhousing size on the Boxster, again you will be stuck with a small sized clutch (whats the boxster? 225mm or so ish.. vs say 300? in an ls1?) which will take a lot of abuse from that motor.

Daymn that miata must've been flyin'

The part about the tranny holding up is where its just going to be shot in the dark. I'm only going under the assumption that if porsche could engineer a tranny 3 decades ago that handled 3x the power/torque, we can atleast hope that the boxster tranny has the same strength behind it. Torque is what actually kills the 914 trannys and subsequently dsm trannys , hence forth why many owners use 283, 302, 327s etc instead of 350s. Wish I could have the funds to destroke the LS1 just so I could cheat around that torque issue or find other means of destroying low end torque without loosing too much hp in the process. I'll tell you something though, my 914s clutch was only 215mm lol. Again though I believe its all up to the driver. Many people have destroyed their 914s very quickly while others have the same tranny for years, its merely a matter of driving style.