LS1 in a boxster - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Lobo1186 · 01-06-2010, 02:12 PM

So I know this has come up before. However, recently there has been some good forward motion on this and I was wondering if anyone has any more insight than what i can find on GOOGLE. So i have tracked down some threads but they drop off. I know brad roberts had hooked his up to his sixspeed but was working on the mounting of the engine. But shortly after the thread ends.

here are some pics of the build on this thread.
boxster spec thread on ls1 convert

this is a real interest since I have an older box and is a great contigency plan for IMS failure. or any other

JTP · 01-06-2010, 02:29 PM

I also had been following Brad Robert's V8 conversion thread and was wondering what had happened. It's too bad the Cayenne/Audi engines he originally wanted to fit didn't work out.

This is the thread I had been reading: http://www.914club.com/bbs2/index.php?showtopic=69069

Topless · 01-06-2010, 03:14 PM

Brad lives nearby and I have seen the project in various stages. It's a long slow process and the devil is in the details.

Lobo1186 · 01-06-2010, 04:24 PM

I cant wait for this to be completed. It would be a real supercar essentially. Not only that for a fraction of what you would pay for a similar Porsche motor putting down the same power. (disregarding longterm upkeep even)

wonder how much the kit would cost. I wish I could help with it all seems groundbreaking.

RandallNeighbour · 01-06-2010, 05:09 PM

I'd drop a LS1 in my car when the motor blows if someone made a kit for it.

Brad, are you listening??????

JAAY · 01-06-2010, 06:24 PM

I want to know if the new 4 cyl turbo that might come out will fit our tranny and mounts. If so I will drop that in and figure out the wiring later.

Lobo1186 · 01-06-2010, 06:25 PM

I was looking through the other thread from a while ago about this and there were alot of haters. it seems maybe some people now see the merit?

Lobo1186 · 01-06-2010, 06:27 PM

Quote:

Originally Posted by JAAY

I want to know if the new 4 cyl turbo that might come out will fit our tranny and mounts. If so I will drop that in and figure out the wiring later.

from what i have heard around the NET is that if they do the 4cyl it may still be just entry level and not meant to compete with the 987S seems childish to me.

they should do it like the 968TS

3.0 4cyl turbo

nice.

jmatta · 01-06-2010, 07:03 PM

Great...a Boxster that sounds like a NASCAR.

coreseller · 01-07-2010, 03:08 AM

I too had been following that thread. The deck height would be an issue, that along with probably screwing up the handling dynamics due to weight / torque. Regarding the sound, my daily driver is a LS1 6 speed and IMO it sounds MUCH better than the 3.2 Boxster, even with a B&B TriFlow exhaust.

Lobo1186 · 01-07-2010, 05:10 AM

I wonder if to help lose some height you could put a dry sump oil system in. that would let you drop the engine at least a couple inches and help with your center of gravity as well.

as far as torque... of course you would need to upgrade suspension a little but I think that if the carrera GT which weighs 3000 lbs and has about 100 more torque than even a well tuned LS1 can handle it. then the boxster should be able to also with some well invested upgrades.

widebody kit anyone?

landrovered · 01-07-2010, 05:57 AM

I have become quite familiar with the LSx to porsche G50 inverted transaxle setup through researching the Factory Five GTM. It is a doable conversion but there are numberous issues that you would face trying to shoehorn that big a setup into a chassis as small as the 986. It is very tight in the GTM and it is a much bigger car.

I suggest you go to the Factory Five website and check out some of the eye candy there. I have seen the cars in person and have the assembly manual sitting here on my desk. It is an awesome car with awesome performance. But it is not for the technically meek. There is a whole lot of problem solving and engineering that goes into the build.

Cheers!

Lobo1186 · 01-07-2010, 08:35 AM

the GTM has an LS7 motor in it. I believe much bigger than LS1. Either way Brad has some pics in those original few posts in this thread and it looks like it fits quite well actually. but it is much more tight than with the stock. (obviously)

the factory five guys have some cool toys..

I LOVE the model 65 coupe... dream car. (that and GT40) among many others of course

landrovered · 01-07-2010, 09:53 AM

FYI: All LS variants are based on the same block design. So they are the same size on all naturally aspirated engines with the exception of the ancilaries but those differences are minor. The supercharged versions are taller but clearance is the same in the other dimensions.

I have lots of info on the LS engine family if anyone is interested PM me and I can email it to you.

Lobo1186 · 01-07-2010, 10:09 AM

oh ok my bad! thanks for the info! well that is good news since It opens up more power opportunities.

love it. (except the wheels dont like those)

Mike_Yi · 01-07-2010, 12:39 PM

The LS7 is a 427 cu.in. engine. The 427 has historically been a big block. I know that the LS7 is nothing like the 427 of the past, but I would be very surprised if the LS7 was based on the same block as the LS1/LS2/LS3. The increase in bore and stroke would be really hard on an aluminum block engine.

landrovered · 01-07-2010, 02:11 PM

I hate to burst your bubble but the LS7 is a small block. Like I said I have been up one side and down the other on the LS family and would be happy to share a fact sheet with the willing. Guessing about stuff is useless at least in the forums I am acustomed to, they would eat my lunch on a rover board.

Lobo1186 · 01-07-2010, 02:43 PM

actually sizes info and weights (im guessing factory) would be much appreciated! I do not doubt what you say be it would be nice to be able to actually get a handle on the sizes in real life as opposed to just pictures online.

but brad has fit one with the mounted tranny in a 986 so either way it should be able to happen as far as that is concerned. we will hopefully find out the rest soon.

if he can get a kit going... i know a few Turnkey motors i could possible find a new home for!

imagine the experience of having a big V8 rumbling inches behind you! only a dream for now

:dance:

Mike_Yi · 01-07-2010, 07:08 PM

Sorry to guess Landrovered. Here's some specifics for you.

The LS1 block is part number 12561166.

The LS7 block is part number 17802854.

They might both be small blocks (though I'm not sure what the definition of small block is versus big block with current motors), but they are definitely NOT the same block.

Lobo1186 · 01-07-2010, 08:06 PM

from cruising a few vette forums it seems the LS series are all short block and essentially the same block.

full motor i have seen a LS1 weigh 480ish and I saw some people say their m96 is around 430ish... not bad.

lose some ass fat on the box and you can end up with ur perfect 50/50 no prob.