Ok guys, give me the pros and cons of these motors. Given an equal starting point, which motor is a better choice for a small daily driven performance wagon?
Ok guys, give me the pros and cons of these motors. Given an equal starting point, which motor is a better choice for a small daily driven performance wagon?
1uz gets a lot of its torque really early in the powerband. And it is a very reliable engine. Aftermarket is small but parts are affordable and plentiful. Oh and they hardly break. Just replace the starter before you swap it in.
Do you want it in auto or manual?
Manual.
I've been looking through a lot of different kits for the 1UZ, tons of options around the $600-$1000 and the w58 fitsmy budget and power potential. S50/52 manual is easy, but the Gegtrag trans have never been the smoothest. I miss the "slap and go" smoothness of my Honda civic trans :/
Well the 1uz has plenty of options. But making it manual increases the price and complexity a lot. The 350z trans and ka24 trans shift and feel very well behind the 1uz.
Use the zf trans if you go bmw
ZF trans will most likely be used unless I decide to keep the 318i trans...
I've spent the last 2 hours looking at 1uz manual conversion kits. Lots of options for spending money, lots of 1/2 done homebrew solutions. Still picking through the pieces. Looks like the swaps will be very close in price once everything is taken into consideration.
That said, which motor would you pick for overall awesomeness? Both were on the Wards Top 10 engine list, it's a pretty close comparison.
1) 3.2L at 7.5K redline is 24,000L/minute 4.0L redline of 6.5k is 26,000L/minute so decently close pumping potential.
2) Kelford Cams for the 1uz are $1520, Sunbelts/Shricks are around 1,600.
3) Off the shelf, only the S50/52 has chip tuning options, 1uz gets expensive in this regard very quickly.
What else am I forgetting?
mr2peak wrote: What else am I forgetting?
Ease of maintenance/repair once in an engine bay?
ProDarwin wrote:mr2peak wrote: What else am I forgetting?Ease of maintenance/repair once in an engine bay?
That is an excellent question. I will be emailing a few people in regards to that.
If you do think about going the 1uz route and need a trans adapter. These guys are the best. They are super knowledgeable and the parts are produced on high end cnc equipment.
http://www.1uzfeswapkit.com/
The quality and fit is awesome...the alignment is based off the bolt centers and dowel pins and my 350z plate from them was bang on. I have heard some horror stories of ill fitting adapters from another supplier/manufacturer based in Florida...but do not have any first hand experience.
The more research I did on the 1uz motor the more it cemented itself as a great reliable option for a hi performance V8 project. It has strong forged internals and is quite light. And cheap!
Also, the early motors can be had with different oil sump locations depending on what they were in originally. I have one out of an LS400 (that has the front sump) and the rear portion of the pan is really shallow. This allows it to fit pretty well in my 190e over the rack and cross member. Just my 2 cents.
Pierre
I have 2 LS400's. It's an awesome motor. I think my 99 is faster than the 98, but teh w3bz say it's the same, so must be ECU tuning from Toyota. They really come on at 4K RPM. Even my slower one is as fast as my Elise was.
In reply to Dr. Hess:
Wasn't that around the time Toyota switched to the 5 speed autos.
They both have 5 speed autos. The 99 has nicer headlights and rides a little nicer. The 98 has a nicer stereo (Nakamichi). They both get the same gas mileage and have similar miles on them.
mr2peak wrote:ProDarwin wrote:That is an excellent question. I will be emailing a few people in regards to that.mr2peak wrote: What else am I forgetting?Ease of maintenance/repair once in an engine bay?
My guess would be the S52 is a lot easier to deal with in the engine bay... but it is slanted to one side, maybe not. I've only had one V-engined RWD car and the difference in access between that and an inline engine is astounding.
The S50 was designed by BMW Motorsports and it a great motor. I'm biased because I have on in my '95 M3 track car. It's won more races than you could count.
The 1UZ-fe is a passenger car motor.
I know which one I'd choose
maj75 wrote: The S50 was designed by BMW Motorsports and it a great motor. I'm biased because I have on in my '95 M3 track car. It's won more races than you could count. The 1UZ-fe is a passenger car motor. I know which one I'd choose
As I probably know as little about the BMW motor as most do about the 1uz motor...here are some details.
The V8 1UZFE is a 3969cc all alloy quad cam as found in the Crown, Lexus, Celsior & Soarer model Japanese vehicles. They have 2mm thick cast iron cylinder sleeves with six bolt main bearing caps and make around 260 hp/200kw at the flywheel. They have sintered and forged connecting rods plus a forged steel crank, which is why they have been known to rev to 9000 rpm on stock internals...as well as withstand upwards of 15psi boost...hardly traits of "just a passenger car motor". Rumors circled that Toyota spent over $1 billion USD in research and development in the UZ engine lineup. Originally released in 1989, the Lexus LS400 was the first model introduced with this groundbreaking motor. This engine was originally meant as a racing prototype for the GT500 series in the JGTC, now known as SuperGT.
"Its resemblance to a race engine platform (6 bolt cross mains and over square configuration) was confirmed in 2007 by David Currier (in an interview with v-eight.com), vice president of TRD USA, stating that the 1UZ platform was based on CART/IRL engine design".
Not to mention: the s50 (US) is barely different than the venerable (passenger sedan) motor the m50/m52 dating back to the early 90s.
That said, I love those motors - stout and easy to work on. And they love the boost.
Don't rule out the m52 2.8 with s52 cams and m50 intake as a low(er) budget option.
M62, best of both worlds?
M52 hybrid doesn't have the potential of the 1uz or S50/52. Sure it puts out S52 numbers, but mod the S52…
M62 is expensive and heavy compared to the 1uz
I've been doing a lot of research over the past couple of days, and the 1uz is sounding better and better. The 1uz is an over-square design while the S52 is under-square. The swap will be more complicated, but not by too much. The driveshaft is the only hurdle I haven't found a solution to other than a custom modified shaft. Also have to make mounts, but that should be easy enough and I'm sure I can borrow a template from someone. The overall potential is truly amazing, I'll be plenty happy with the stock 300hp for a DD for a while, and a 150shot for hooliganism should be no problem at all. If I want to break axles, boost is tried and true.
And Toyota spent 100 million dollars developing the 1UZFE.
The 1uz if you get really dumb, will also make totally obscene power under boost.
I know someone on this board blew through many 1UZs under boost because of a crankcase ventilation problem, so watch out for that.
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