Thinking about an LSX?

[Crepitus]

I have been thinking about a high HP sports car, a 944 or a C4 Vette. So I bought 1 of each, a 87 944 and a 84 Z51. When I get each properly sorted out i will decide what one will get some HP. A 944/951 with 500hp & 450fp just got a lot easyer. All the stuff a guy needs to know in a handy little manual. I just got mine and its mighty cool. You can check it out here.

http://sites.google.com/site/944v8conversions/


[/url]http://944hybrids.forumotion.com/forum.htm

[Schumi]

Interesting way to go about it. Discover which one you like most and do what you want to it. Sounds logical.


Be aware that theres cars like this:

http://forums.pelicanparts.com/porsche-cars-sale/473170-1986-951-400-hp-15-000-a.html

that pop up from time to time.... 951's can be a quicker and potentially less time consuming/involved way of having that horsepower without the extents of swapping in a new drivetrain.

[gt1scca]

Originally Posted by Crepitus

I have been thinking about a high HP sports car, a 944 or a C4 Vette. So I bought 1 of each, a 87 944 and a 84 Z51. When I get each properly sorted out i will decide what one will get some HP. A 944/951 with 500hp & 450fp just got a lot easyer. All the stuff a guy needs to know in a handy little manual. I just got mine and its mighty cool. You can check it out here.

http://sites.google.com/site/944v8conversions/

here's a good bbs on the swaps.
944hybrids Forum: V8 Conversions

Corrected links...
944hybrids Forum: V8 Conversions

The Porsche® 944 V8 Conversion Manual

[gt1scca]

Originally Posted by Schumi

Interesting way to go about it. Discover which one you like most and do what you want to it. Sounds logical.


Be aware that there's cars like this:

http://forums.pelicanparts.com/porsche-cars-sale/473170-1986-951-400-hp-15-000-a.html

that pop up from time to time...

Nice car...Far too nice to disassemble and start over. The great thing about the V8 conversion is the opportunity to "salvage" a sub-$K car. There are nice cars being brought back from the brink of the crusher...for about $5K or so.

In other words, I can respect both views...although a GM V8 is going in mine.
But, it is a 120K mile blown Turbo...

[jsteve340]

If you are going to go through all that work,make sure you read up on the 84 Corvette engine and the crossfire injection system.It has the least horsepower of any Corvette motor from 1984 thru current models.The crossfire system lasted only one year on the C4 and was switched to tuned port injection for 85.
I think the engine itself will be fine,but the crossfire just does not allow it to breathe and make any power.Although the 205hp the 84 Corvette engine makes is still better than the 150 my 87 944 makes.

[jcommin]

+1 for Steve.

The FI on the 84 only lasted a year. I would use the engine as a base and determine what it would take to switch to the tuned port injection.

My personal favorite is the all aluminum LS series. About 50 lbs heavier than an N/A but you would more than triple the HP. Lots of aftermarket engine components to make one wicked small block.

[flash968]

one thing to note about engine weights is that american engine weights are published stripped of accessories and manifolds, whereas european engines weights are published complete with all standard accessories and manifolds

this frequently amounts to about 50 more pounds, so factor that in

[Crepitus]

Thanks for the comments! That 951 is fantastic! In the long list a built 951 was a real posibility... well, still is. The C5 was in there too. That 951 package is a real deal at 15k. I am a little concerned about how long the motor will last at 20+ psi, any thoughts on that? I will see if I can give the shop a call. It has the same advantage as the built SBC in the Vette, it already fits. But at 400hp the LSX has not even started to wake up yet. The LSX tork curve is sweet too. There are a few shops doing the Porsche LSX swaps, I have not been checking out the prices though as I am planing on doing this myself.

I hear ya about the Cross Fire. I like the 84 Z51, If I go that route the engine trans will come out. I plan on something like we run in the short track late models with a TKO-600. The Vette has great aftermarket support, is easy to work on, but is 300# heaver.

Sorry bout scrwein up the links, Thanks for fixing them GT.

[rickharrison]

That conversion manual looks like a MUST buy for a swap. Awesome link.

[xschop]

I am about finished with my swap and I wish I had the manual before I started. Greg has done an A-1 professional job in the publishing of this manual. Thanks Greg

[DVC]

Originally Posted by flash968

this frequently amounts to about 50 more pounds, so factor that in

There's less than a 50lb difference between an LS1 and an N/A on a finished swap. LS1 weighs the same as a 951 motor and I/C.

[Cocacolakidd]

The LS series with the low profile injection air intake is also the only set-up that fits under the oem 944 hood - otherwise it is a bubble in the hood or exposed to the outside.

The expense of a conversion is always around 15K so I would rather put the 15K in the Porsche motor and lightening the car for performance - then it would more than likely out perform the V8 conversion.

[flash968]

dvc - check the corner weights again

[924RACR]

Price out a C6 Z51 before you commit that route. They're surprisingly inexpensive - even MY08 Z06's are going now for like 50-60k. And all of the mod cons. Take one for a drive. The C6's are light years beyond those old fiberglass beasts.

Think about it: 440hp, and enough chassis that you have to really work to get it seriously out of shape.

I work on 'em (the new ones) - they truly are world-class sportscars. Not that an LS-powered 944 sucks - driven them too - but I'd have a hard time talking myself out of a 3rd year C6 Z06 - what'd that be, like '04-05?

At the same time, it'd be hard to pass up the opportunity to own something I actually made (a new one - '09-onward)... just money!

Anyway, just a counterpoint to consider, before you commit...

[speedracing944]

Originally Posted by Cocacolakidd

The LS series with the low profile injection air intake is also the only set-up that fits under the oem 944 hood - otherwise it is a bubble in the hood or exposed to the outside.

The LT1 also fits under the stock hood.

Speedy

[DVC]

Originally Posted by flash968

dvc - check the corner weights again

Again? I've done it more than once. Guess what...it makes a 968 lighter than stock

[flash968]

prove it - show me before and after weights

an LS1 is 385lbs bare (no accessories no manifolds) - a 968 engine is 372 lbs complete - the larger radiator, manifolds, alternator, chassis reinforcement, bigger brakes, yada yada would put a 968 at over 100lbs heavier

[DVC]

You prove it.

[flash968]

it's all over the web and easy to find - a fully dressed LS1 is far more than a fully dressed 968 engine - you have to compare apples to apples

if you end up lighter it's because you yanked out other stuff from the car, not because of the engine weight

[xschop]

Don't forget to shave off another 10-12 pounds getting rid of the large 944 vacuum booster during the swap....The simple LS uprights shave off another 10 lbs compared to the fandangled 944 motor mount contraptions too....
Fidanza LS flywheel shaves another 15 lbs off the equation...hehe

Tilton Dual MC Setup - Page 4