So i have a question since this seems to be a good swap even though i really want a V8 there are alot of these engines in my state and nicely priced. My question is i was reading and notice the supercharged L67 and non L36 have some differences above the block and was wondering if i pick up an L36 can you put a M90 on that engine or no?

Thanks

[This message has been edited by ShaneSAW (edited 11-02-2011).]

Yes, it's called a Top Swap and they even have kits on ebay for that too.

Price wise is it worth it or just better to find a complete or near complete used L67 vs L36 and later swapping the top end? I could probably pick up an L37 with 10k and under for about a grand and one with around 60k for $600. These are just engines, nothing else that is required... alternator, ac compressor sensors etc... So what do you think?

Thanks

G, I should start reselling these engines.

With some leg work you can get a complete accessorized L67 for under $500 with under 100kmiles

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Turbo 3800 E85 5spd spec5
11.53@126.7

quote Originally posted by Justinbart: G, I should start reselling these engines. With some leg work you can get a complete accessorized L67 for under $500 with under 100kmiles

I dont doubt that but why not invest some extra cash for a nearly new engine? Anyway where is a good place to find an accessorized L67?

quote Originally posted by Justinbart: G, I should start reselling these engines. With some leg work you can get a complete accessorized L67 for under $500 with under 100kmiles

This is true but it takes some time and looking but it can be done....

if ur doing a swap buy a whole car so you have 90% of the parts you need and you know how everything runs

Start with the L67, I bought mine for $425. Get as much of the harness as you can, and all the sensors.
I believe the internals of the L67 and L36 are different, since the L67 accommodates for the different compression ratio that the supercharger necessitates. Please correct me if I'm wrong. edit: I am totally right. See below.
Plus M90's go for around $200 or so on the 'Bay.

Just start with the L67 if you want a supercharged engine, don't make a ton of extra work for yourself.

[This message has been edited by Fiero1K (edited 11-02-2011).]

L36 vs L67 Rods



https://www.fiero.nl/cgi-bin...5323&style=printable

quote Originally posted by ShaneSAW: I dont doubt that but why not invest some extra cash for a nearly new engine? Anyway where is a good place to find an accessorized L67?

Yes, but the L67 engine and its family have pretty well proven themselves to last well into the 100k range and above. If you ever visit the Grand Prix forums, a lot of guys do not start modding their engines until the mid to upper 100k range and have no problems whatsoever. I agree that having a nice low mile engine is a benefit, but I always wonder when I see people rebuilding these engines why they even bother. For the most part I would just leave the engine alone, clean it up, and throw it in a car and be good to go. The L67 engine I bought had 80k miles on it and I don't even think twice about going through the bottom end of the engine, just leave it alone and move on.

As for doing a top swap, I say go for it if you have the time. I have a spare L36 short block that I will be doing a top swap on to go in my Fiero. The extra compression and power is definitely nice with supercharger.

quote Originally posted by Fiero1K: Plus M90's go for around $200 or so on the 'Bay.

You can find them for much less than that. I've been trying to sell my Gen III s/c with the throttle body for $125 for almost a year with no luck. I have a local guy that may pick it up this week, finally. Do some looking on ClubGP.com in the For Sale section and you should find plenty of Gen III s/c for very cheap....I believe I saw one the other day for only $50 plus shipping!

If you do go with the NA version first, be aware that the NA heads will not work with the supercharger setup. The fuel injector holes are in the heads on the L67. They are in the manifold on the NA version. So in order to do the top swap you will need heads, lower intake, supercharger, crank pulley, belt tensioner and I'm sure I'm leaving something out. Plus don't forget the new bolts and gaskets. You can probably find an L67 for less money than buying all of the top swap parts. If you think you want to go with a supercharger, do it the first time around.

quote Originally posted by 2002z28ssconv: If you do go with the NA version first, be aware that the NA heads will not work with the supercharger setup. The fuel injector holes are in the heads on the L67. They are in the manifold on the NA version. So in order to do the top swap you will need heads, lower intake, supercharger, crank pulley, belt tensioner and I'm sure I'm leaving something out. Plus don't forget the new bolts and gaskets. You can probably find an L67 for less money than buying all of the top swap parts. If you think you want to go with a supercharger, do it the first time around.

x2. Top swaps cater to those with a na3800 car already. The top swap can be completed in one long day without removing the engine.

Or if you need to replace your bottom end and just move all your supercharged goodies on top of the cheaper na3800.

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Turbo 3800 E85 5spd spec5
11.53@126.7

[This message has been edited by Justinbart (edited 11-03-2011).]