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Old 10-24-2010, 11:01 PM   #1
kylej
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I decided I'll just go with 500 approx rwhp, give or take fifteen but 500 would be nice... Then if I want to go bigger later I can. Is this possible with bpu++++? And still reliable.

Nevermind you clearly said 450 was possible with good compression bit not 500. If I was to go with 500 still would it involve turbo upgrade?

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Old 10-24-2010, 11:31 PM   #2
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Originally Posted by kylej View Post
I decided I'll just go with 500 approx rwhp, give or take fifteen but 500 would be nice... Then if I want to go bigger later I can. Is this possible with bpu++++? And still reliable.

Nevermind you clearly said 450 was possible with good compression bit not 500. If I was to go with 500 still would it involve turbo upgrade?
For 500rwhp you'll need a small single turbo kit. If you want to go bigger later on, you'll need a new turbo (you'll have to remove and resell the smaller 500rwhp one), and a fuel kit.

If you want to go with the goal of 450rwhp+ and bpu++++, that is only achievable with a just-like-brand-new engine, just-like-brand-new turbos, and a 6spd. Are you willing to swap out these oem parts, depending on their mileage/hours/condition? If not, 425rwhp (with a 6spd) is probably the max you can shoot for - and even that level depends heavily on those same components already being in very good condition (but brand-new condition isn't necessary for 425rwhp). If your compression numbers are low, or your oem turbos have a lot of miles/hours on them (or they've been driven very hard), and you've got an auto transmission, 375rwhp or so may be the best your setup can achieve. Again, it's all a matter of $, time and experitise.

Again, are you 6spd or auto?

Again, what is your application?
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Old 10-25-2010, 01:05 AM   #3
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6 speed manual trans, I don't think I would want a single turbo would it be possible to stay twin and reach 500whp? I just driving the car as a summer car and take it to the strip sometimes to race other people, it's like a Friday night thing at a local drag strip.

if I was to go with the 425-450 rwhp how much would it cost for the new turbo's, etc. that I would need to be brand new again?

okay I made my decision, i'm gonna go bpu++++, we will get whatever whp out of it we can without turbo upgrade, if i want i can do that and change everything later but as a daily driver 400whp approx, should do.. thanks for the help and if you could let me know what I'd need, that would be much appreciated, thanks.

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Old 10-25-2010, 04:49 PM   #4
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6 speed manual trans, I don't think I would want a single turbo would it be possible to stay twin and reach 500whp?...
Yes, it'd be possible, but it's not practical. You'd spend about twice as much (or more) as you would simply going single turbo to get that 500rwhp.
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...I just driving the car as a summer car and take it to the strip sometimes to race other people, it's like a Friday night thing at a local drag strip.

if I was to go with the 425-450 rwhp how much would it cost for the new turbo's, etc. that I would need to be brand new again?...
Last I recall, brand-new turbos from Toyota are about $2250 EACH, and a new shortblock is about $3,250 or so...
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...i'm gonna go bpu++++, we will get whatever whp out of it we can without turbo upgrade, if i want i can do that and change everything later but as a daily driver 400whp approx, should do...
You'll need all the standard bpu stuff, plus an fmic, an aftermarket bov (recirc), adjustable cam gears, and a fuel controller. You'll need a spring on your wastegate, and you'll need to run about 25% race fuel to bump up the octane.

I've never bpu'd a Japanese-spec Mkiv myself. I believe you'll also need a speed limiter defensor. We may also need to find a way to get your downpipe connection made larger so you can run a full 3" US-spec downpipe.
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NB: Please consider posting any help requests in a new thread instead of asking me for help privately. About 99.9+% of the time, private help requests end up covering great information that could be very valuable to other forum members. If you have a good reason for needing the help request to be private, I'll consider it. If not, then why not give everyone else the opportunity to pitch in too, and/or learn from the information? Remember, there's no such thing as a dumb question. We're all here to help within this family of Supra owners.

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Old 10-25-2010, 05:01 PM   #5
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So would it be cheaper to just go bpu++++ and make what I can, like 400whp or 425 or whatever I'll get or single turbo and make 500whp?
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Old 10-25-2010, 11:27 PM   #6
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So would it be cheaper to just go bpu++++ and make what I can, like 400whp or 425 or whatever I'll get or single turbo and make 500whp?
Correct. However, with a single turbo you get to choose 500whp, 650whp, 800whp, etc... In other words, most folks who go single turbo aren't content with only 500whp.
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Displacement is no replacement for boost.
Life begins at 30psi.


NB: Please consider posting any help requests in a new thread instead of asking me for help privately. About 99.9+% of the time, private help requests end up covering great information that could be very valuable to other forum members. If you have a good reason for needing the help request to be private, I'll consider it. If not, then why not give everyone else the opportunity to pitch in too, and/or learn from the information? Remember, there's no such thing as a dumb question. We're all here to help within this family of Supra owners.
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Old 10-25-2010, 11:43 PM   #7
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How much more expensive would a single turbo upgrade be? And if I chose to go bpu++++ this year how much money would I waste going single next year?
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