This is addressed to Lynn because he replied to someone else's thread on doing a homebuilt p-port using 12A parts, but if anyone else has any opinions, please chime in. I'm totally new to rotaries though I've loved them forever.



In calculating my need/want list for a 20B turbo swap, the grand total has basically scared me away from it. The car is a 1973 Datsun 240Z which used to have a 383 small block Chevy and 6-speed trans, but the engine/trans were sold because I got bored of it!



The new plan, which is turning out to be too expensive, was the 20B. I already know that the 13B-REW ex manifolds will not clear the frame rail, so a new manifold and a big single turbo will most likely be needed. Add on aftermarket ECU, injectors, intercooler, piping, manual trans/clutch, etc. and I can easily see how people end up spending $20,000 or more on this swap. Also need to include porting and rebuild kits.



The new plan in my head is a 13B p-ported turbo...i can do all the labor myself and hope to end up spending much less than the 20B idea. Just getting a 20B costs at least $4,000, without shipping!



My thinking (after reading your 12A p-port post) is to scour the junkyards for 13Bs (hopefully T2s) and buy them at $150 a pop, tear them down and keep what's good and put together a p-port engine. Even if I bought 3 engines and 1 trans, it would only be about $700. Money saved could be used for a nice turbo, intercooler, clutch, etc. etc. If I could break down the engine at the yard, it'd be even cheaper as I wouldn't have to buy parts I don't need. FDs don't show up in our junkyards and are too expensive for me to buy elsewhere-I've spent so much money already, am extremely cheap now!.



The car is smog exempt and won't be driven daily. I would weld up new intake and exhaust manifolds as well as all the piping. I could use the stock ECU for ignition and a Megasquirt for the fuel. It's more of an occasional autocross/Sunday drive in the canyons kind of car. Going back to the stock engine is not an option. I know a turbo probably wouldn't be ideal for this, but I want it anyway :-)







What do you think of this plan??? I'm guessing that a p-port would be bad at low rpms, but a quick spooling turbo would compensate. I'm not shooting for highest HP bragging numbers, etc.



Would I definitely want to get 13B engines or would 12As suffice? There are more of them in the junkyards. Price is the same for either. Are engine internals the same for NA and turbo 2nd gens?



Thanks!

Owen



PS I know someone who has a 13B-REW Cosmo engine and don't want to do the same exact thing as him...it's so hard being unique!

 

Someone move this to the rotary engine building forum...

 

Scaliwag on vintagerotaries has done a great job with the custom PPort motor, go there and search for his name you are bound to find the infomation that you will need.

 

make sure in your junkyard search for engines that youfind rotors with matching letters.

 

[quote name='drftk1d' date='Jul 26 2005, 07:04 AM']make sure in your junkyard search for engines that youfind rotors with matching letters.


[/quote]



Thanks guys, sorry for posting in the wrong place!

Owen