944J

why would it blow up any more than an lsx with nitrous?

Olli Snellman

I suppose it's not just european manufacturers who use parts from various vendors, it's the same think with japanese and american manufacturers as well.

Ferrari use also parts from other vendors like Bosch, Magneti Marelli, Brembo, Speedline etc.etc. just check out older Ferrari's they use parts from Fiat, like winshield wiper and blinker switches. It's like first gen 944 used quite many VW parts. And those Nippondenso A/C parts can be found also from 911 &928 models, not just 944's. Also new 911 use japanese parts like Aisin transmission in several models.

I do not have anything against these engine swaps, i just think GM V8 is not that innovative engine to use. Also my country's law is against this, we are not allowed to increase engine disaplacement more than 25%, so GM swaps are out of question.

Lorax

I understand why people do it, but then again.. I don't.

Everybody and their mother has some kind of lsX in their RX/240/944. Nothing new or interesting about it, and those motors have been built a bajillion times in a bajillion different ways already. I guess it doesn't fulfill my need to tinker and push the limits. The idea is just rather... boring.


I want to put a cayenne v6 in the car. That would be a cool swap with lots of potential. You would have to partially tube frame the front end.

V2Rocket

too much boost pressure and inadequate fueling (it can happen even in the best setups) will detonate, destroy pistons and valves, blow head gaskets, blow piston rings, snap rods, shear crankshafts......

the same can go for nitrous though as well...

Lorax

If you have proper failsafe devices it is difficult to do.

I would have to try really hard to overboost and destroy my motor... really hard.

Then again 951's mysteriously spin rod bearings without explanation.

944J

isnt that because of the oil problem?

it seems like all the reasons are known for blown up 915's so what's the problem? use more fuel

i think that at 400-500hp the 951 is the engine to use

if you want 600 or more then the lsx is cheaper

944J

use more fuel if you have inadequate fuelling, $200 fix, problem solved, next...

Lorax

He's talking about AFR. Sometimes crazy stuff happens. At 500rwhp a 944 motor is much closer to the limit than a lsX. A small lean condition can equal big problems.

Lorax

You could have a custom crankshaft made (Which costs thousands)

You can try perp drilling the crank, although some argue that this only makes it worse, especially if the drilled holes are too large.

You could go dry sump, which is a large amount of work, and an even larger amount of money.

Personally I have wound up changing rod bearings about every 20k miles so it hasn't been an issue for me.

944J

yeah i agree, but whats the cost difference?

i think i'll be doing an lsx engine but want to know the cost difference for home built engines 951 3.0 vs lsx

Lorax

I think the cost to do a really bulletproof 3.0L would be about the same, that's just my opinion.

If I were going to build a 3.0L 500rwhp reliable motor it would look like this

whole 968 motor in excellent shape - 2000

Dry sleeving - 2000

custom rods - 1200

custom pistons - 1200

crank work - 600

custom turbo/ exhaust 3000

custom cams and head work - 2500

Some kind of EMS - 2000

clutch etc - 1000

FMIC - 500

custom oil cooler - 500



and that's before all the miscellaneous costs that would be incurred.

944J

sounds like an lsx crate engine can be more plug and play, less searching for parts, etc.

Lorax

If that's what you are into. You will also just have the same boring old crate motor as a billion other folks with all sorts of different cars.

Really just depends on what you are looking for.

If you build a 3.0L to 500whp.. that's impressive.

building an lsX to 500whp is well.... forgettable.

Sure as hell would be fun though.

I guess the only solution is to have both.

V2Rocket

it only takes a second of improper AFR to destroy everything...

another thing, in order to get that high of HP youll need a bigass turbo, which will take a while to spool up...and suddenly at 4500+RPM when it spins up all the air starts rushing in, and suddenly your DME fries lol and you get like a drop of fuel when you really need 50x more you go kabloooommm

doesnt seem likely but it happens...

944J

is this a good engine?

what's a good price for it?