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Thread: Turbo Rotary Mazda B2600i Minitruck Build!

  1. #16
    Registered Member magnumP5's Avatar

    '86 RX-7 Base, '79 RX-7 GS

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    Nice build. I had an old '86 Toyota Pickup and I was thinking of going this route with a 2JZ motor. Well that never panned out, now I have a '09 Tacoma and I'm going the opposite direction.

    So what are you looking for in the engine department? Being an RX owner myself I'm curious.
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  2. #17
    minitrucker mymmeryloss's Avatar

    13bT Mazda B2600i

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    well, i may have complicated things a bit much, but being a fabricator, i want to make it work.

    the truck is converted to rhd minus the steering box which i am trying to source and everyone keeps telling me i cant go rhd with a 13b turbo because the turbo mani is in the way, but i believe there is a way to accomplish this, but if not, no sweat.

    anywho, the plan is a 13b of some sort.

    right now i am thinking an s5 turbo II engine, but i really want to figure out a way to put the 3 rotor 13bTT in there out of the fd.

    either way i know im going to have to make a custom turbo mani since the camber issues on the front wheels are probably going to sit too close to the turbo, but like i said i wont be able to tell until i totally decide on an engine and actually get it micked up in the bay.

    any suggestions?

    i am going to be running a brake booster delete with wilwood clutch and brake setup that runs the m/c and clutch m/c inside the cab and will ease the complication of the rhd conversion quite a bit i believe, so thats one step in the right direction on that and all my fuel, brake, and clutch lines as well as my wiring will be tucked and hidden out of the way, so i shouldnt have to worry about heat on these parts.

    i just need an engine, and firstly to decide on which one i want to get.

    2 rotor or 3 rotor. single turbo or twin. and which generation engine also.

    like i said, i am leaning towards the s5 swap.

    any pros or cons to anything mentioned would be greatly appreciated.

  3. #18
    Registered Member magnumP5's Avatar

    '86 RX-7 Base, '79 RX-7 GS

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    Okay, well first, a few clarifications:

    2-rotor engines:
    13B = N/A 6-port engine out of S4/S5 (FC)
    13BT = single turbo 4-port engine out of S4/S5 (FC-TII)
    13B-REW = twin turbo 4 port engine out of S6+ (FD)
    13B-RE = twin turbo 4 port engine out of JDM Cosmo
    13B-MSP = side port 'Renesis' engine out of RX-8's

    3-rotor engine:
    20B = twin turbo engine out of JDM Cosmo (option)

    20B's are expensive. Swaps into RX-7's edge upward of $20k without including labor. As for the other motors, there are slight variations between S4 and S5 turbo and non-turbo engines, S5's making the greater power in both forms. The RX-8 engines are only naturally aspirated but make more power then any FC engine and are capable of spinning 9k+ RPM.

    Plenty of options to consider. What are your goals for power, torque, etc?
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  4. #19
    Undisputed Parts God ScratchNSniff's Avatar

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    Can't believe I missed you posting this up over here...good to have you here...

  5. #20
    minitrucker mymmeryloss's Avatar

    13bT Mazda B2600i

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    Quote Originally Posted by magnumP5 View Post
    Okay, well first, a few clarifications:

    2-rotor engines:
    13B = N/A 6-port engine out of S4/S5 (FC)
    13BT = single turbo 4-port engine out of S4/S5 (FC-TII)
    13B-REW = twin turbo 4 port engine out of S6+ (FD)
    13B-RE = twin turbo 4 port engine out of JDM Cosmo
    13B-MSP = side port 'Renesis' engine out of RX-8's

    3-rotor engine:
    20B = twin turbo engine out of JDM Cosmo (option)

    20B's are expensive. Swaps into RX-7's edge upward of $20k without including labor. As for the other motors, there are slight variations between S4 and S5 turbo and non-turbo engines, S5's making the greater power in both forms. The RX-8 engines are only naturally aspirated but make more power then any FC engine and are capable of spinning 9k+ RPM.

    Plenty of options to consider. What are your goals for power, torque, etc?
    well god knows i would love a 20b swap, i mean who wouldnt. but its just not in the cards.

    the goal here really inst power, just something extra for people to look at and be like wtf kind of motor is that? is that stock, ya know?

    i think i will be happy with the stock numbers for now, but i am one of thsoe people that cant leave well enough alone ya know? so it will probably be upgraded eventually. i just want to get it in and running first.

    i am leaning towards the 13bt out of the fc turbo II, but i would really loveto go TT. any suggestions on that if it will work or what i would have to do with a turbo mani or if it would work with the rhd conversion or not?

    Quote Originally Posted by ScratchNSniff View Post
    Can't believe I missed you posting this up over here...good to have you here...
    hey buddy. ya, this place seems cool.

    how often u on here?

  6. #21
    Registered Member magnumP5's Avatar

    '86 RX-7 Base, '79 RX-7 GS

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    Quote Originally Posted by mymmeryloss View Post
    well god knows i would love a 20b swap, i mean who wouldnt. but its just not in the cards.

    the goal here really inst power, just something extra for people to look at and be like wtf kind of motor is that? is that stock, ya know?

    i think i will be happy with the stock numbers for now, but i am one of thsoe people that cant leave well enough alone ya know? so it will probably be upgraded eventually. i just want to get it in and running first.

    i am leaning towards the 13bt out of the fc turbo II, but i would really loveto go TT. any suggestions on that if it will work or what i would have to do with a turbo mani or if it would work with the rhd conversion or not?
    A lot of the guys actually end up ditching the twins. The stock system is a sequential system, which tends to bring a lot of unneeded complexity. It's been proven that a properly sized single will have just as good, if not better response than the twins.

    As for turbo mani's, there really isn't too much out there. HKS makes a cast piece that is bolt-in and also a tubular manifold with a T4 flange. A-Spec Tuning makes some good (but pricey!) complete turbo kits for the RX-7. Aside from that, you're on your own.

    If you really want to do something different, why not stay N/A and going with a bridgeport or peripheral port? Take a 4-port turbo motor, remove all the turbo stuff (and everything else), peripheral port and ITB's. Not only will you have a very minimalist engine bay, but you'll have pretty much the sweetest sound on earth coming from your engine bay.
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  7. #22
    Dog Mod FTW! Saskatchewan17's Avatar

    2008 TR Mazdaspeed 3

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    I agree with magnum... you could probably just stay N/A with a 13B and bridgeport. It will be more than enough to scoot that little truck around.

  8. #23
    Undisputed Parts God ScratchNSniff's Avatar

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    I am on here quite a bit...if you need anything let me know...

  9. #24
    minitrucker mymmeryloss's Avatar

    13bT Mazda B2600i

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    Quote Originally Posted by magnumP5 View Post
    A lot of the guys actually end up ditching the twins. The stock system is a sequential system, which tends to bring a lot of unneeded complexity. It's been proven that a properly sized single will have just as good, if not better response than the twins.

    As for turbo mani's, there really isn't too much out there. HKS makes a cast piece that is bolt-in and also a tubular manifold with a T4 flange. A-Spec Tuning makes some good (but pricey!) complete turbo kits for the RX-7. Aside from that, you're on your own.

    If you really want to do something different, why not stay N/A and going with a bridgeport or peripheral port? Take a 4-port turbo motor, remove all the turbo stuff (and everything else), peripheral port and ITB's. Not only will you have a very minimalist engine bay, but you'll have pretty much the sweetest sound on earth coming from your engine bay.
    i have a friend, another honda guy, that wants me to go n/a with the 13b also, but i really want a turbocharged vehicle(im sure u understand the reasons lol).

    i am pretty sure i am going to have to fab up a custom manifold myself or have a shop build me one(pricey either way, i know).

    alright, so im hearing the same stuff over on this site as i am on a lot of others that i have been browsing.

    looks like i will stick to the fc turbo II engine and go from there.

    i appreciate all the help man. u have been the most straightforward and knowledgeable out of anyone that has lent words to my build!

    Quote Originally Posted by Saskatchewan17 View Post
    I agree with magnum... you could probably just stay N/A with a 13B and bridgeport. It will be more than enough to scoot that little truck around.
    i know the sound of itbs is great, bt nothing matches the sound of a turbo spooling imo.

    thanks though

    Quote Originally Posted by ScratchNSniff View Post
    I am on here quite a bit...if you need anything let me know...
    alright dude. any luck on that steering box?

    imma send a few more emails today

  10. #25
    minitrucker mymmeryloss's Avatar

    13bT Mazda B2600i

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    alright, i got my taxes done yesterday so i am ready to order the swap.

    anyone have any suggestions on where to order a turbo II engine that im not going to get screwed over on?

    i dont have a problem paying a little more for an engine that is going to be lower mileage and more reliable..

    any help is appreciated.

  11. #26
    minitrucker mymmeryloss's Avatar

    13bT Mazda B2600i

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    ok, well ive got some pics. noting special, so dont hate.

    like i said the truck is back together for the most part. i just wanted to make sure everything mounted up right.

    maybe ill get to tear back into it tomorrow...

    anywho, heres it going back together. shaved cowl vents, just need to shave the windshield wiper hole..


    its still really rough for the most part, but i have enough clearance for 20's now..


    different angle. the whole fender is going to be boxed in over the trailer fenders. i just cant do anymore sheetmetal til i get the engine mocked up..


    i dont care what anyone says, that shits low..


    bumper and grill back on. ready for a rotary? i think so...


    messy ass garage...


    time to tear down again and finish the grinds and start some bodywork..



    i have decided on an engine btw..

    im going 13bt out of a 88-92 rx7 turbo II fc3s.

    this makes the most sense since it is a single turbo and most everyone with the twin turbo eventually goes to a larger single turbo anyway.

    its a 2 rotor, so its small enough to fit and look very clean in the shaved bay.

    anyway, turbo, ya. thats about it..

  12. #27
    Registered Member magnumP5's Avatar

    '86 RX-7 Base, '79 RX-7 GS

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    I'd be very weary of purchasing any engine off of eBay. While you would in fact be getting a S5 TII engine, what you don't know is how long it was sitting there before you bought it. It's bad enough when a piston engine has sat, non-running for a while, but it'll pretty much render a rotary useless. There are a couple of reputable dealers out there. Mainly the RX-7 shops, and you'll end up paying more, but at least you know you'd be getting a properly running engine. Rotary Resurrection in TN occasionally has engines in stock and pretty much has the cheapest rebuild costs of anyone around.
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  13. #28
    minitrucker mymmeryloss's Avatar

    13bT Mazda B2600i

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    Quote Originally Posted by magnumP5 View Post
    I'd be very weary of purchasing any engine off of eBay. While you would in fact be getting a S5 TII engine, what you don't know is how long it was sitting there before you bought it. It's bad enough when a piston engine has sat, non-running for a while, but it'll pretty much render a rotary useless. There are a couple of reputable dealers out there. Mainly the RX-7 shops, and you'll end up paying more, but at least you know you'd be getting a properly running engine. Rotary Resurrection in TN occasionally has engines in stock and pretty much has the cheapest rebuild costs of anyone around.
    good to know.

    ya, ive done a few honda engine swaps, and its always a huge concern of mine on getting a lemon. i dont mind paying a little more for something thats not going to need rebuilt or whatever ya know?

    i wouldnt buy an engine off of ebay, but i have found a few sites that seem pretty good with warranties and stuff, so i guess we will see when the money is in my hands what i decide to do..

  14. #29
    I'd be careful buying an engine from any site honestly if you can stay away from it. All my friends who have bought rotary engines from any site have ALWAYS had issues. You can throw up a post on RX-7 club or craigslist for CO.

    All that being said what are the plans for exhaust, ducting for the stock intercooler or front mount etc.? Just wondering if there's anything you need help with to make the motor last and get cheap power out of it if you want.

    Oh, and by the way, just sick dude. The skills, and work you've done is rare these days, I can definitely appreciate the truck but now that I know you're sticking a rotary in it, it makes it 1000 times better.

  15. #30
    minitrucker mymmeryloss's Avatar

    13bT Mazda B2600i

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    Quote Originally Posted by blackedoutFC3S View Post
    I'd be careful buying an engine from any site honestly if you can stay away from it. All my friends who have bought rotary engines from any site have ALWAYS had issues. You can throw up a post on RX-7 club or craigslist for CO.

    All that being said what are the plans for exhaust, ducting for the stock intercooler or front mount etc.? Just wondering if there's anything you need help with to make the motor last and get cheap power out of it if you want.

    Oh, and by the way, just sick dude. The skills, and work you've done is rare these days, I can definitely appreciate the truck but now that I know you're sticking a rotary in it, it makes it 1000 times better.
    i appreciate it man.
    there are a lot of guys out there that still do some crazy fab work.

    the club i am in is known for a lot of crazy stuff. www.severedties.com check it out. we have a guy in our chapter that has a crazy custom tacoma and is building a 4 door mitsu mighty max(ya, as u know mistubishi didnt make a 4 door mighty max).

    anyway, i am planning a front mount for it. i just want to get it running and reliable. this truck doesnt get driven much since its really not practical on a daily basis.

    i have done a lot of research on the rotary and such, but i still feel like i am way in the dark on this engine and exactly what i will need.

    i have heard it is a relatively easy swap, but u always run into problems. i expect problems, and i also expect to figure out a way to make it work.

    if i can get a complete swap that is going to be reliable for $1500-2000 i will be very happy, and will be able to purchase the engine soon if i can find one for that. with that being said, colorado is impossible to find an rx7 especially one that is low miles and being parted out for that matter..

    i may just end up going with a reputable site and hoping for the best. if i have to have it rebuilt, i guess thats something i have to deal with since there are no rotary gurus around here that i know of.

    there is still a lot of fab work to be done on this truck and i dont want u guys thinking this is what the truck is going to look like when done. im not just throwing a rotary in there and calling it a day. a lot more metalwork and possible a new back half for the frame. its gonna take some time. i really hate having the truck down for thew count but i am not going to rush this build one bit.

    i do appreciate the help and all of the advice, and i would appreciate some help finding a quality engine thats going to save me time and money in the long run, so any help on that would be great.

    also, any tips and tricks and things to look out for during the duration of the swap would also be very helpful.. the less i spend on this swap, the more i can dump into power adders and completing my paint and interior and such..

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