Rotoraider

If my memory serves me correct, I think Rob quoted a base price of around $9500 for a 4-rotor. Could be wrong but it wouldn't be a bad deal at all, considering it is from Pineapple.



Just went to Pineapple website and it says this:



"Pineapple Racing is capable of building almost anything you can dream up, from a tame, non-turbo street engine to a high-boost, nitrous injected drag racing motor to a 4-rotor monster (yes, one is in stock and ready to build to your specs)..... "

Jeff20B

Any word on your 4 rotor project? The motor mounts are almost ready in the GSL-SE.

Danomite

I spoke to Jeff on thursday night and he just needs to get a front counterweight then send it to be balanced. Once it is balanced I think it just needs to be packaged and shipped Going back to the assembly, if you run the stock ball-spring setup it has to start from the middle since the jet assembly is not self contained, unlike jet assmbly in a 20b which is self contained. So basically the oil jet bore goes all the way through the extension lobe (3rd and 4th lobe).

Jeff20B

Congrats on getting closer. My next step is exhaust.



I think I understand. Since the ball and spring assemblies are longer than the simpler, shorter jet-only setup, they actually extend through the front and rear lobes and into the main shaft itself. Thus requiring the builder to not add the ball and spring assembly until after each lobe is installed. The only way to do that is to assemble the middle of the engine first. Then add the front and rear lobes and ball and spring assemblies. Did I get that right?



So I guess the next question is: which oilers should we use? What are the differences/benefits? If I remember correctly, you can use Weber jets as oilers but you have to watch your oil pressure at low RPM and it's not that great for street use. I'd think that with a 4 rotor, there are twice as many opportunities to reduce oil pressure and volume simply because of twice the amount of bearings needing oil, as well as double the oiler jets; I'd prefere to use stock oilers and drive it on the street.



We want a maximum RPM of around 8k so the stock oilers make more sense for this project. We also don't want the extra hassle and expense of running an external oil pump. I know Lynn will smack me but we want to keep it simple and use an FD oil pump.



Looks like I need to come up with a way to secure the middle on an engine stand.

Danomite

Yea, thats pretty much it. I am going to be running the stock setup since it will be a streetcar, and the fact that low rpm oil press is a good thing I'm just going to fab up an adapter for the engine stand outta some .25" plate...my friend has a 20ton break and punch I can use I've been thinking about running a 20b pump, just not sure what that will require, if anything?

Jeff20B

I think the 20B pump is the same as an FD pump. I could fit a 1st gen front cover on my 20B. It's probably compatible with whatever you want to do.



I need to pick up some 1/4" steel and build myself an intermediate plate holder for my engine stand. Then I can stack rotors 2, 3 and 4, lock everything together, flip it and add the front rotor, then lock it and flip it back over to add the tension studs and nuts. Does that sound like the correct assembly order?

Danomite

That will work fine. 1/8 carbon steel strips will work to hold the assy together for flipping it over, and its cheap...probably the only thing that will be cheap for this project I'm egarly awaiting the "ready to ship" email from Jeff...

z-beater

wow, there has been a lot of progress. Congrats to you both. And Jeff, that car used to have a REW in it, right?

Jeff20B

Yeah. Now the owner is considering using 13B parts. It's his car and money but I'd prefer to stick with 12A stuff because it fits. 13B stuff would require moving the tranny back, redoing the motor mounts blah blah blah. Plus it will end up costing nearly twice as much.

Danomite

umm...why? For an extra 80hp or so probably not worth the extra time and costs. It'd be different if you hadnt started yet, but like you said it's his car. If he absolutley has to have more power just "slap" a small gtr turbo on there =P