13B port? which one?
 

Hey there guys not sure if this is the correct section. Looking to port my 13B, wasn't sure which template I should use though. Pinapple racing or streetbeat?

I'm curious as to the possible power output. I have an 84 GSL-SE with the 13B, i'm unsure of if this is the 6 port or 4 port model. A friend who I bought it from offered to do it as hes very experienced with it.

I want the engine to last but I want at least 200hp to the engine, not sure how much a medium street port would give me.

any input or experience with these templates? thanks in advance.

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The GSL-SE would be a 6-port. Did you mean Racing Beat? I don't think they offer a 6-port template but Mazdatrix does. I had asked almost the same question acouple months back but didn't get too much response save one that sounded promising. Here is that thread.
https://www.rx7club.com/naturally-as...plate-1032230/

Unfortunately I am just getting my porting finished up and haven't got the car back together so no info on before and after the porting. The Pineapple ones are nice 'cause they are already cut out but as to which makes better power I have no clue.

I can say porting alone won't get you to 200hp. You will need a full exhaust if you don't have one already and a standalone ecu since I don't think Rtek offers anything fo the 1st gen ecu, or at least a S-afc to adjust fuel. I don't think you would see much benefit from porting without doing the exhaust first( if you don't have one already). Dig around this section. There is a wealth of information on how to hit your goals here.

i'm reading the 84 gsl se in 84 was a 4 port, i'm unsure now...but I already have a performance exhaust and it made a very noticeable difference. Would a large street port and a performance exhaust and intake do it? we're doing exhaust porting as well otherwise it wouldnt gain much.

its a 6 port. however, finding a front and rear 12A iron makes it a 4 port, so that would be an option...

okay......hm I have access to a 12a but i'm just bent on making a fairly quick 13b. something that keeps up just fine in traffic if you know what I mean

I think you will still need some way to tune fuel and a wideband O2 sensor and gauge(for tuning) to get to where you want to be. You will have most od the pieces but would need the tuning to bring it all together. Some in this thread talk like you may have to go to a S4 or S5 intake manifold setup to hit those numbers.
https://www.rx7club.com/1st-generati...d-ecu-1033815/

You would still have a 13b. It would just be a 4-port. Some say once you start porting the 4-port is a better base to build off of due to the timing of the ports and not alot of porting can be done on the 6-port. Can end up making more power with the 4 port but you may have to completely ditch the stock intake setup and piece something together. Someone else like j9fd3s or PeeJay or others can better explain this than I.

How simple would it be to swap in a turbo II? should be completely straight forward considering their 13b engines right?

to physically put it into the car is not much of a problem - particularly since you already have an SE block to get the needed parts from. however, to get it running is another story. then to get it running RIGHT is at least an epilogue or sequel to the story.

hmm well turbo may not be the answer then.on theother thread the guy mentioned the setup to use, im going to give that a shot but cant i just swap the intake and use turbo II one to Turbo my 4 port? Id prob have to go with a standalone system

wait would the swap not just bolt up and work with the current hardware? what would be so difficult afterwards as far as getting it to run right?

I try not to impose my thoughts too much on others looking for advice, but this is sort of what I was getting at in your other thread when I said you have to make a choice.

performance- and performance potential- wise ... the SE engine (as a unit) kind of sucks compared to the 6 ports that followed it. however, I think it was a hell-of-an-engine in it's time. what i'm saying is even if you were to keep the SE block and port it and work with it, if you applied some of the newer 6 port parts and advantages, you could end up with a pretty sweet setup.

that said, I know you seemed to be leaning toward carburetors in the other thread, but you have options. the question is which one you feel is right for you and your budget.


... and as for the Turbo manifolds fitting any 4 port 13B, it simply doesn't work like that. you'll have to do your research on this. the 4 port engines pretty much all have different bolt intake patterns.

I suppose i'm too used to chevy engines haha. Just about everything is compatible across the 305/350/and 400 so excuse my ignorance. I'm probably going to do a street port and modify the intake and exhaust portions and be done for a while. in the future ill do an engine swap but pushing 170 or so to the wheels and be done for now. I feel like I could do that on a holley and some mods.

I wanted to get s street port on my 13b too, but imma just go the same route as you for right now. I already have full header/exhaust set up. Im looking into getting a complete holly kit from racing beat. How much power do you guys think this set up will put out? This is the 1st rotary i own so im not really that inform but ive been learning a lot on this site.

I recently did a half bridgeport on my 13b. Currently running a rejetted Nikki carb and stock exhaust. I'm robbing myself of power with these components but still turned 169 rwhp on the dyno last weekend.
If all goes according to plan I'll have the complete RB street port exhaust system installed by the end of September and I'll do another dyno run to compare the results.
The RB Holley kit will be purchased in January (or Christmas if my wife decides I've been good!) and a subsequent dyno test done to document the actual power gains with each step.

I used 12a irons and 13b rotor housings to build the engine, so it's a 4 port. I'm curious as to the limits of an NA rotary so I'm going to keep pushing the envelope with mods to see how much she can take before she either breaks or stops being a reliable daily driver.
When I hit that point , then I'll do a Turbo II swap :)

so I am running a ported 6 port, not sure which templates were used, but the way it runs is WAy different than the gsl-se engine i had. Since port time was increased by the larger port, and the fact i run with the 5 and 6 port open with no sleeves and side draft carb, the power band has changed a lot. Everyone told me you can not run it with the 5/6 port open, that is bs, you can ,BUT you have to tune around the extra fuel required to make it idle and perform in lower rpm range.

That being said, i have done lots of tuning and carb mods to the Dellarto side draft to make it perform correctly, these can be found on the site Gruntled.com. when finished it ran as good as any fuel injected engine, easy starts, no hickups and smooth acceleration all the way up to 8k. so just a few thought for you to consider in your build.