Im always looking at ways of horsepower gain and stuff like that, but recently i was reading some forums and i herd someone mention about a 3 rotor engine. I know they exist but i have only herd of them being in a 3rd gen. I wanted to know where you get one of these, how much they are, how much work it would be to convert my 87 NA to a 3 rotor, is it NA or is it turbo, what all else has to be changed when converting to a 3 rotor (tranny, rear end, etc...). Is it worth it?

 

Do you have $20,000?

Yes: Continue the thread.

No: [/thread]

 

EXPENSIVE. to get it done u need like 40,000 dollars.

also if u wanna do it urself, u gotta change the crossmember and mounts cuz they are not the same.

unless u got a good paying job, i wouldnt do it.

however, it would be nice

 

There's a 20B forum on this board. It's in the Rotary Performance section.

 

If you have to ask all these questions, then I highly suggest walking away NOW!

You could search and find the info you need but I'll give you some info. The 3 rotor 20b engine was only available in the Eunos Cosmo sold in japan. It was available only in a sequential twin turbo setup. Most people that put them in Rx's go with a single turbo setup with a nice EMS. However it can be converted to NA too.

Since your car is an NA you would need at least a turbo drivetrain, EMS capable of running the 20b, turbo kit for 20b, intercooler, plenty of fuel system upgrades, and more.

If you want major HP the 20b can do it. Many 20B drag cars produce well over 1000HP.

 

it'll cost you twelvteen bajillion right off the bat, plus you need a standalone.

in all seriousness, you need about 10K for a bare bones setup from where you're at

 

Spend two years researching 20B FC projects done by others. Then ask us again.

 

put nitrous on your fc.

 

for some reason, most people on this forum with a 20b think they are superman or some ****. Its really not that hard, or that expensive if you do most of it yourself.

heres what you do:

Learn to weld.
Learn to fabricate (involves a hell of a lot more than just welding)
Buy a TII rolling chassis.
Buy a 20B ($3500) and ECU($1000 used)

then make your own mounts and plumbing and all that ****.

I got lazy and paid for some **** i didnt need to, and my swap only cost around 7k. I alkready had a modded TII tho.

pat

 

well said.

not to take anything away from those that actually worked hard (not just spent hard) on their 20B projects, but it all comes down to a need for elitism. and i'm not saying that to defend all people that posts these types of questions because i see a lot of guys come on here after waking up from a wet-dream after reading something in a magazine or on a forum and then get to thinking, "wow, that looks easy and i can get XXX hp just like that guy." - it must be frustrating to those that have done it. however, what i don't like are those that respond with clear disdain for anyone that dares to ask a question or those that simply speak out of their ***.

 

patman. . .don't forget to buy a welder, factor in the cost of materials for learning how to weld, because you're not just gonna pick it up first time you strike an arc. . .plumbing and what not isn't free, no matter how frugal you are, even crap like fluids adds up

those few hundreds here and there keep piling up. plus, you didn't factor in the cost of the car, if he's starting with an NA, he needs a turbo tranny, and rear end

i don't think my 10K estimate was far off even with the approach you suggest. i think that buying mounts is a WAY cheaper alternative than getting a welder and learing how to weld for an fc install, they're like 300 with poly mounts.

 

big rizzlah,

i wasnt actually referring to you. 10k is a decent estimate. for that amount you could get a rolling TII, a 20b, a ecu, and a turbo. plus plumbing and ****.

as far as learning to weld....well, MIG welders are cheap nowadays, a used lincoln is like 3-500, add $120 for a lease on a small bottle of argon and a small bottle of 75/25, and youre set. Hell a monkey can MIG weld. and mounts arent the only thing you want to weld together... The major things I made myself for my swap were: T4 manifold, downpipe, various mounting brackets, radiator mounts, IC mounts and pipe. I actually bought a set of mounts off ebay, then rewelded them cause they looked flimsy.

put all that together, and even including the cost of the welder, i probably saved 4-5k over what i'd have paid a shop to do it.

7k is my total cost, including pretty much every bolt, for the 20b, ecu, wideband, all the plumbing, fuel system, wastegate, manifold, mounts, and everything. all i started with was an empty engine bay, a turbo, a radiator, and an IC. I might end up just a hair over 7k by the time i get it streetable, but i dont think so.

pat

 

since your asking the motor is around 3500 Longblock; around 6000 for complete motor, tranny, harness, ecu... (ecu and tranny is pointless unless you want it Auto).... mounts SpeedmachinePerformance.com sell them for 230 i believe... Which saves you the crossmember but will require you a custom oil pan or get a Moroso racing oil pan... then you need a ECU (1200 for Haltech), Stock harness for the clips, Single Turbo setup since the stock twin setup will be hard/impossible to clear th shock tower, then you need a FMIC (between 200 ebay and 900 from greddy etc, then you need custom piping, upgrade the fuel Injectors around 300, pump depands how much HP you wanna push under 450 get a Walboro 255lph 100, and hopefully your good with wiring and could wire the ecu your self and not pay for it... then you need tuning usually runs around 180 per hour so know think if you really wanna get into this... if you have the $$$ go for it if you dont then its going to be a long project

 

not to mention a turbo kit, BOV, Wastegate, and a manifold which could be from around 1500 to 5000 depanding how big you wanna go