85turbo12a

glorious torque is what we are all after....that and an engine that starts without feeding it rare earth elements....

the 1uzfe is no slouch in the torque dept, for such a small cu in engine, as opposed to chevy engines that were originally truck engines reworked for performance, the 1uz is the opposite, it was initially designed as a racing engine, then they decided to turn it into a low end power luxury car engine....so you get a cam profile that lumps up on the bottom end...but the engine will rev to 7500....turbocharging this combo yields some pretty nasty numbers well north of 500 ftlbs at the wheels, for a 4.0L thats pretty healthy, hell even the factory torque is like 280ft lbs at around 2800rpm(dont quote me on that im going off of memory)

and for a 400lbs engine its all good. yes the aluminum LSx engines have more...but so what...im tired of looking at them in everything. i might end up with one eventually but for now, as a street car ill keep it unique, but if i want to turn it into a drag car and run 8s i will use an lsx.

85turbo12a

engine is in the car, here are some pics of the various clearances, and just...well pics..still a long way to go, but every step counts.

digitalsolo

iTrader: (2)

I'm with you for the most part, but the SBC was designed for and originally used in the 55-56-57 Chevy cars, which were performance models of their day. The LS1 design was originally used in the Corvette. Both have truck engine variants, but they were modified to use in a truck, not the other way around.

85turbo12a

while i refer to them as truck motors, technically you are correct, but they are truck motors, they are overly heavy, and overly common and they even sound like truck engines up until you make one really radical or with a 4/7 swap cam...those sound pretty nice.. and all aluminum SBCs are super expensive, the ls1/2 is a much better starting point than a boat anchor iron engine.

i dont hate them..i love engines of most types, my friend has a 427cui alum SBC that makes about 900hp on motor alone....i would run that in my car in a second, but i wont put an iron engine in it. on principle alone. that and as i said before...tired of seeing them...they are in everything...every hot rod at the local shows has one, every race car at the track has one....nearly every swapped 7 has one...i know they work good but man..there are other more interesting options lol though i dont recommend a DOHC v8 in a gen 1 7 for the average guy...its a bit of a squeeze to make it proper and not just cobb job it in there and glue a hood scoop on it.

eidk

iTrader: (3)

Yes, DOHC V8. This is what i want.

StatusPerformance

Very nice project! Whats the build cost looking like for this kind of project?

eidk

iTrader: (3)

What transmission setup you using?

85turbo12a

the mazda T2 trans, its in the thread here or on RCC or lextreme and my facebook page linked here. read up.

cost...well not as much as you think since i do my own machining and fab...but if you had to pay someone to do it...quite a lot due to huge time investment.

pics and updates coming soon

85turbo12a

actually i did not detail the trans here yet in this forum, sorry. the other forums are linked here though, as well as the facebook folder. in short here is some info

the choice to use the T2 trans is simple...cost, i already had a forged steel flywheel and nice ACT clutch/pressure plate capable of the HP intended so since i did all the adapters myself for free, all it cost me was about 25 bucks for some special hardware, and then bout 100 bucks for a brand new camry starter since the T2 starter lacks the testicular fortitude to roll over a 4 cam v8, as for the strength of the t2...we shall see, they are pretty tough, my 12a made a good 400+ and i beat it like a stepchild, trans still works and sounds perfect.

here are some pics of said adapters and trans, and subsequent shifter modification to move the engine/trans back 4 inches in the car which was very very needed...

the most annoying part of the conversion was having to make my own hardware...since the m10 x1.25 and m12x1.25 bolts needed for the bellhousing adapter were not available in a socket flat head, however both 1/2 and 7/16 fine bolts are both 20 threads per inch, and are available in socket flat head, and 20 TPI is VERY close to 1.25 pitch in 1 inch length it only varies like 10 thousandths-ish, so i simply made a set of soft jaws to clamp the screws in the lathe and turned them down to respective diameters and rethreaded them at 1.25mm and you cant even tell it was done, got lucky on that.

the rest of it was straight forward and fairly simple, all coords were logged accurately on a horizontal mill at work and it fits really nice, is doweled properly and should work as good as the trans will work. its strength comes into question, but i will just be nice to it at first and test it as i grow accustomed to it.

85turbo12a

incidentally the alternative transmission solution is going to be the LT1 version of the t56 6 speed. with the same sort of adaptation configuration and it will use the lt1 starter in the same manner.
the t56 is nearly perfect dimensionally to what i have with the modified T2 so it will just need the new adapters, Xmember and driveshaft, then one of those nifty speedo drive units.

but thats only if needed, since thats a pricey addition, probably cost nearly $2k after its all said and done to buy it, the clutch/flywheel/press plate, the speedo box and mod driveshaft.

85turbo12a

progress update, headers are fabbed and turbos hung in place to begin plumbing down pipes and intake piping, intake is bolted down now, just have to finish the throttle body and install it.

ill probably end up using a free standing IAC unit with a GM motor and billet housing so i can put it where i need to and run lines to it

still have to detail the underside of my hood before installing on car, then i can monitor clearances as i finish it out.

TRISPEEDFD3S

iTrader: (26)

That is just beautiful.

ZDan

Thing one: so what? Thing 2, as mentioned, neither the original small block Chevy nor the LS V8s were designed to be TRUCK motors, they were high-performance CAR engines.

Toyota UZ engines are truck and luxobarge engines, never came in a performance car as far as I know. But again, so what?

How much does a 1UZ weigh? I would bet it's about the same weight as an LSX, maybe more.

DOHC adds bulk and adds weight. And it adds the weight up HIGH. DOHC is the best solution if you can only have a limited displacement. But for the same external engine size and weight, you can generally get more performance with a larger-displacement cam-in-block OHV V8. And it will have a lower c.g. and get better fuel mileage for the same power.

On principal? There's a good enough REAL reason: the iron small block Chevy motor is about 100 lb. heavier! But an OHV ford 302 with iron block and aluminum heads isn't any heavier than an LS, so "iron block" doesn't *necessarily* imply "overly heavy".

Good to have some variety, but then again I've never encountered another LS V8 RX-7 on the road...

All that said, it's a very cool swap that you're doing, I do hope you can keep the gen-1 hoodline

85turbo12a

^well if you actually read the thread you would already know its under the stock hood, with 2 turbos hanging on it.
as far as encountering other v8 7s, the last local car show there was 1 rx7 there, it was a gen 3 with an ls2, there were 3 lsx 7s and 1 lt1 7 at dgrr the year i went, and that is just a few examples, they are very common if you hang around car meets, shows and rallys.

and i dont care what info sights and speculation say, i weighed my engines, the 12a was 375lbs with turbo, the 1uz was 405lbs without turbo(s) so no significant difference in weight...but a HUGE difference in horsepower, torque and everything else except for center of gravity and im 100% unconcerned with that little detail.

now for updates

waiting on some mandrel bends to show up to begin the final plumbing, my exhaust isnt going to be as quiet as i had planned due to space constraints but it will still be fairly innocent sounding none the less.
i was hoping to have the final drive ratio changed before i drive it but time and money are pushing that back, ill just play with it as is for now, ill still get better mpg than the 12a regardless, it just might be a bit of a handfull to drive with the 3:90s...but that will make it fun.

more pics soon as plumbing begins, still waiting on my intercooler as well.

digitalsolo

iTrader: (2)

Looking good, should move out. Keep up the pictures.

85turbo12a

thank you, and it better

I am very anxious to drive the car again, cant wait, i want to experience the new steering and suspension more than the power....but lets not BS...the power is going to be fun too hehehehe
that and i want to just drive it..its been down for just over a year now since the swap began, i remember that night well, my little 12a made it back home wheezing and coughing but it drove into the garage under its own power before it stalled and that was that, the process began that night with some teardown.

ZDan

Didn't read every word in thread, not likely to, apologies there... Judging from the pics, I was worried about clearance at the front of the intake plenum, didn't look like it was gonna fit under the stock hood. Great job if it does!

Ah. I generally don't.

OK. For me, the lower the better. 405 lb. without turbos, but with all other ancillaries and the stock exhaust? Curious what it will weigh in at fully dressed, with turbos and intercooler(s). Total weight gain will surely be over 100 lb., which all considered ain't bad for a twin turbo V8 swap!

Will be interesting to see what the F/R distribution winds up being.

Anyway, disparaging LS engines for being "overly heavy" is a funny criticism as there's no way your twin turbo 1uz is going to be lighter than an LS. Granted, with twin turbos you'll have a TON more streetable power potential! But weight-wise, you're most likely going to be heavier than an LS swap...

3.90s would definitely be fun! Instant smoke show in the first 2, maybe 3 gears

Looking forward to seeing this run!

85turbo12a

never said it would be lighter than an LSx, just more original, the lsx series is awesome in every way, there is no argument there, i just dont want to be another ls swap in a sea of many, as it stands my build is a 1 of 1 and that matters to me, i can swap an ls in easier than the 1uz, but meh no challenge there. any redneck can do that, takes a bit more finesse to do something special as for power potential, im nor worried it will have more than it ever needs as it is, it is a STREET car that goes turns and stops, not just a straight line car.

and yes i predict my total gain to be around 100lbs, mind you i added weight to the rear with the 8.8 and the battery so overall the balance should remain the same or better.

85turbo12a

just a word of advice zdan, before trolling someones build thread that obviously has WAY more building experience than yourself, might wanna actually read the info contained and study the pics for the little details that make up a build, and do some real research on the subjects contained, because belting out a bunch of figures and speculations on a project already carefully planned just makes you stand out as a forum racer.
i know all about said engines, have owned many, built many of neat car, mine and for others, i have driven 1k+ hp cars, and therefore know what will and wont work for my application.
i have already done the supporting mods to make my car better on the road than it ever was stock, if you dont think it will be, come to the mountains with us and just try your luck against the little silver 7.
and i like being different.

that said..back to the build.

I am looking for a used(read cheap) autopower cage for the gen1 somewhere in the lower eastern states preferably, i saw a few for sale but are too far away to be realistic.

im also casually looking for a kamei front spoiler

and dont worry when its up and running i will be making HD vids of it on dyno etc.
and if you want a pic of a specific part of the build that i havent already posted just ask. but do follow the links to the facebook and RCC and lextreme forum as I have lots of info between them all.

thank you for the support guys
this website has always been usefull to me for info so just trying to give back what i can.

jaggermouth

iTrader: (1)

that bay looks awesome man

85turbo12a

ah ha learned a new trick...sorry machining and fab i can do...not so great at forums sometimes

digitalsolo

iTrader: (2)

I always find this attitude sad.

Which redneck built this car?



Seriously though guys. This thread is a nice car and nice build. No need to give him **** and 85turbo, why talk down to other setups? FWIW ZDan has a very nice LS2 FD, that is quite sorted, I think he'd hold up pretty well with your car on the corners.

So, let's cut the bullshit. Less bitchin, more pics.

85turbo12a

here is a pic of the hood closed with the engine in the car for all you skeptics out there

85turbo12a

i wish i had even as much room as an FD to work with...and thats not saying much...but im not giving up...
as for talking down im not talking down on them except for not wanting them and the fact that everyone seems to keep trying to justify them instead of X engine, that FD in that pic is nasty no doubt, i dont hate it, but i dont want it either...see what im saying?

as for pics...im learning...bear with me...i just figured out the insert thingy...dont hate..im not a forum expert...

85turbo12a

i weighed the 1uz with all the stuff i will be using plus a little fat like wiring etc, car does not have AC as there is no room for it and the previous owner of the car butchered the under dash and i just never wanted to go through the torture to replace everything, and living in florida i constantly slap myself for that..but now with the 1uz i cant have a compressor or condenser anyway...just have to man up, muscle cars didnt usually have AC and i love them too so its a muscle car yeah!!

dont know the weight of my cooler as i dont have it yet, but as for weights of coolers and turbos its negligible to me to the gains they provide, as for balance, again it should be fine if not better, im not sweating over that stuff im building it the way i want it, its a street car not a time attack or drag car, it handles like any other gen1 mildly scary at times with the straight axle but i dont push it that hard because the very last thing i want to do it wreck it or even put so much as a scratch on it, i drive it hard...but carefull...

but rest assured i will weigh it when done, i have a friend with race scales to mooch off of

my biggest concern after startup is the alignment of the car, with all the new changes i hope we can get the front end sorted out without much issue, then ill go toss it around in a parking lot or something and see how it acts, i dont want any suprises