DD/time attack Build: Mazda Rx7 FC

[ESRotary]

Bought my fc back in January 2010, but didn't get it on the road until february 2012.
It had a 13B turbo engine with aprox 220rwhp(measured with a gtech) when i bought it, just got one track weekend in before the turbo blew(was probably already on it's last psi's when i bought the car), so i took out the engine and planned to put on a bigger turbo and make lots and lots of hp. Bought the Stock NA angine and threw that in the car as a temporary engine, that way i could get the car street legal and daily it, while i built the other engine.
After some soulsearchin i decided to go NA instead, less things to go wrong, and IMO nothing beats NA power, tho it might not make as much as a turbo.

Since i decided to go NA, i knew getting loads of hp would be too expensive and just not drivable on the street, so i have set my goals on around 200-250rwhp, wich should be doable without selling my kidneys.

That's more or less the history of the car in my ownership, so time for some pictures.

When i bought it:










Last summer at a trackweekend:







My "new" S4 NA engine



Stripping off some parts







Went from distributor to CAS


The engine is in the car and has been running strong ever since Febuary.

[ESRotary]

Tearing down the turbo engine, to use it as a base for the NA build.

[ESRotary]

Made some ducting for the radiator last weekend, should help keep temps down. It was kind of a rushed job, since i need to get the car ready for an upcoming track weekend.

[ESRotary]

Plans for the Semi pp build.

Semi pp (Small periphial port and medium size streetport). (link to help non rotary people understand what i'm talking about: Porting)
4*42mm tb's mated to a custom intake manifold, longer runners for the side port tb's and mechanicly staged so that the periphial port tb's does not open until higher throttle openings.
High comp rotors
2*1000cc ID injectors
Aeromotive 13301 FPR
Haltech sprint RE




A sketch of how i plan to build the intake:


Engine components.




Mock up off the Semi pp engine.
http://i1073.photobucket.com/albums/...P/IMG_1757.jpg

[JoeyV]

This makes me warm and fuzzy inside! Keep it up!

[ESRotary]

Thanks

Talking about fuzzy, meet "Pissy the dead piston"

[JoeyV]

haha, that's awesome! Rotary FTW. :P

[RotaryEnergy]

Hello mate,

Would advise you to change the stock oil cooler to a pair of stock FD3s ouil coolers. They fit perfectly below the lights.

J

[ESRotary]

Any point in doing so? With the turbo engine last year i ran oil temps around 80-90 celsius at trackday's.

[ESRotary]

Turned out the front iron need extensive lapping and possibly nitrating to be usable and the center iron was ported badly(port cut in to the oil seal tracks).
So i have just ordered center and front iron, + new side seals(one of the old once had clearence of 2-3mm, as a reference this should be closer to 0,15mm).

Also ordered extended streetport template and bridge/PP exhaust template, so when this all arrives i should have everything i need to build the shortblock.