Quote:
Originally Posted by venturaII
If 300 NA bhp is your goal, and entirely achievable with a J series, then explain how that's 'down on power'?
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NA headroom. 300hp NA is entirely possible. I had a bored and stroked 3.6l J and made 296/275 at the wheels without a tune. But, it costs a good amount of money to make more than ~340whp, which is the reason I got away from that platform (that and it was in a FWD boat...).
And yes, I am aware that 340hp is more than 300hp, but my point is that there are other swaps that provide better bang for your buck, and a better base to start your build on. Nearly everyone says their initial goal is 300hp; then they live with it for a while and want more. If you're staying NA, you reach a point of diminishing returns around 340whp with the J. It's good power - don't get me wrong - but it's pricey to get there. Most that say they are there don't have dyno graphs to back it up, and those that do spent A LOT of money doing so.
Quote:
Originally Posted by ort895
Shhhh, there is no reasoning with a "put an LS in it" guy.
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I'm confused...are you referring to me? If you look through the thread, I was the one that took an old J block and lined it up with the FR-S transmission while I was replacing my clutch. I wanted and
planned this swap out, but when I ran the numbers, it just didn't make sense.
This swap is entirely possible. A transmission adapter and a new clutch can certainly be made to mate the J to the FR-S tranny. But I really don't think it's worth it, which is why I scrapped the idea. I also had my doubts that the transmission would be up to the task.
It's no secret that I do like the LS, however I think it's a bit "lazy" for this chassis. I also like the 2J, but the iron block is a turnoff. Truthfully, the 1UZ appeals to me more than both, however you're still kinda tapped out for NA power.
Quote:
Originally Posted by venturaII
Not to mention that an LS or 2J will require a different transmission, better cooling, and likely axles and such. A V6 needs none of that.
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As I mentioned above, I'm not sure the stock transmission would last long. I don't know why you think the stock axles can handle a 300whp/260-280wtq engine - Sprintex powered cars are breaking stock axles, and they're making less. Also, from my measurements, I'd want to shift the engine back a bit, otherwise it's hanging over the front axle pretty far and would foul on the hood (it's a 60* block, the engine with heads and intake is tall). So thats money into a new oil pan, oil pickup, and intake manifold. While those are still requirements for other swaps, parts are plentiful, and in most cases, cheap. For cooling - quite frankly, you should upgrade cooling on a stock FR-S/BRZ, so this would already be done for someone that is starting a swap.
I'm not looking for a fight, I'm just speaking my mind. I love the J, even for all it's quirks. It sounds good, it's reliable when built properly, and surprises a lot of people with what it's capable of. But I don't think it's a great use of money for a motor swap into this chassis.
With that said, I'd still love to see it happen, but with someone else's wallet lol