KahnBB6

iTrader: (5)

Hey guys,

I had a longer version of this but I simplified my query (and yes, I have searched a LOT). I know this isn't a new topic but all I can find are threads where much higher than totally stock horsepower levels are talked about in conjunction with a W58's lifespan against boost.

I have the original 200k+ mile W58 in my car. It's never seen boost but I do drive somewhat aggressively. I don't slam gears, power shift, drift or drag race but I do occasional tail slides and get to 50mph+ fairly quickly by revving the engine up frequently. I have a 4.27 LSD rear end (and the original 4.08 open in case I need it). The transmission has an ACT Stage 2 organic-face clutch and the stock flywheel.

If I swap in a 1JZ-GTE VVT-i engine and keep it 100% STOCK down to the side mount intercooler and stay with only the minimum uprated clutch I need to hold stock power, am I still going to risk blowing the W58 due to shock-loading given my driving style?

I am absolutely planning on getting an R154 to swap in but what I don't care to do is blow the W58 before that happens, so I want to know if such low factory horsepower is still going to be a problem for the NA transmission.

Thanks!

blk&blu*j

iTrader: (1)

Sorry to say but GL.
even on stock boost your adding atleast 60-80 hp over stock and it comes on much more abrupt (torque) than stock.

KahnBB6

iTrader: (5)

blk&blu*j, I appreciate your honesty. Those characteristics sound like exactly what I want and exactly what my stock 5-speed doesn't want. I'm not doing the swap right now but I am planning ahead. My thought is that if I'm chancing my W58 no matter what I do I have to procure the R154 and all swap parts for it first and then start looking for a 1JZ VVT-i, since manuals are scarce.

It's just confusing when many, many people seem to have this opinion that a W58 can handle xxx horsepower and yet they are also considered fragile depending on how you drive them under boost.

blk&blu*j

iTrader: (1)

Yeah sorry but based on your own admission (driving style ) it will be done!!!!!!!
But curious why a 1jvvti? the turbo sucks, parts are a pain in the ***, Soarer 5spds vvti rare and correct me if I'm wrong but your putting this in the car from your signature??????Right.

KahnBB6

iTrader: (5)

Fair enough, lol. I'd rather eventually sell the W58 in working condition than see it strip a gear.

The 1JZ VVTi? Yeah, that's what I'm now building towards. I built the car to its current state for California mountain roads. That's the reason for the custom 4.27 rear end. I wanted it to be a road handler. I've ridden shotgun in a 600hp 2JZ-GTE SC300 with a V160 and loved the rocketship quality but the oversquare bore and stroke of a 1JZ appeal more to what I want from my car's powerband and lower horsepower goals since it's a daily driver.

The non-vvti 1JZ turbo system is expensive to rebuild, doesn't flow well and tends to get replaced by an aftermarket turbo kit followed by more modifications than I'd care to get into outside of a weekend hobby car. The 1JZ VVTi system, on the other hand, seems to give the engine great low end power, slightly better flow if you upgrade the turbo to a better steel wheel or just replace it altogether with the Tomei ARMS turbo. Other than that (well after the stock engine swap) I'm just not going to go further with the engine, so I'm content to stay within the 500hp ceiling for the 1JZ VVTi.

I like the 2JZ-GTE too of course but they're more much expensive and I'd still want just the stock power with a later maximum of a USDM twin setup to Stu Hagen specs.

I've read plenty about NA-T setups and they just aren't for me. Too custom for a daily.

Also, as a last consideration, I was very concerned about emissions while the car was registered in Cali. Now that I'm in Florida it's not a worry but I could move elsewhere in the next couple of years so while it's not a USDM engine, the 1JZ VVTi will run a bit cleaner than the 1JZ non-VVTi.

From what you've got listed in your signature you have one sick car! Way beyond my goals though And where are you getting E85?

account2x

iTrader: (5)

500hp is the point where it starts getting hard for even a single turbo 2jz vvti to make on pump gas.

If I were you I would buy a 1jz vvti 5spd soarer complete swap from a local importer. They have the best prices and it'd be complete. Buying a 1jz w/o a r154 is a very poor idea IMO.

KahnBB6

iTrader: (5)

With the 1JZ VVTi I only stated that it had a general ceiling of 500hp with an upgraded turbo. Nowhere did I say that I was focused on making 500hp. I'll probably try for more horsepower well after I've actually swapped in a stock 1JZ VVTi and R154. Right now I just want 280-300hp (crank) with the mere potential to raise that later. After banging my head against a wall with Cali smog I can now actually consider this engine and even choose to leave it stock if I feel it's enough for my modest DD.

I hear you about buying the whole package but whether I do that or not comes down to cost and availability. I have time to wait as I still need to buy many little things before a swap is possible but given the nature of beaten used engines with manuals and the fact that I may be better off rebuilding an R154 and converting it for SC duty myself rather than run a worn out trans, I think the transmission being on the engine or not will be a moot issue.

The point of my thread was to make absolutely sure a W58 shouldn't be used with even a 100% stock 1JZ VVTi. I have my answer, so as much as I want to focus on finding a 1JZ VVT I see the biggest priority as replacing my W58 before even looking for a swap. I could change my mind later because the entire combination can be found for JZX100's and Soarers but right now I see the W58 as the roadblock.

g-magoo

iTrader: (2)

I have a bolt on 1J, original W58 (180k), beat the **** out of the car every day and have had zero issues in almost 3 years.

KahnBB6

iTrader: (5)

That's good to know! I just bought an R154 front driveshaft so I am already one step closer to making the conversion. My W58 has 213k+ or whatever my current mileage is. I do drive aggressively but in the sense that I only have 180whp to accelerate with. Edit: This has mostly to do with getting up to 50mph. I don't abusively shift or clutch kick. "Aggressive" driving in terms of what most owners with high horsepower cars would define it as I really can't say. I feel as if I wouldn't work the engine out as much as I do now under normal circumstances if it were a 1JZ.

I do wonder if the delivery of torque would make a difference to the W58 between the non-vvti 1J you have and a stock 1JZ VVT-i since torque shows significantly by 1800rpm and peaks/levels at 2400rpm.