JayRolla
New member
The fuel mods are added when you add the underdrive pully which gives you more boost. On the low psi pully you dont need fuel mods.
Ebay 5vz-fe Turbo
- Thread starter Singtoe
- Start date
The fuel mods are added when you add the underdrive pully which gives you more boost. On the low psi pully you dont need fuel mods.
Robb235
Senior Member
Yeah, maybe I went a little far with that. His whining just irritates me.
Robb235
Senior Member
I don't see how CM's setup would be any more susceptible to knocking than the TRD blower. He's running the same PSI as the stock blower, and sees lower intake temps.
I know the top mount is going to see higher IATs than the rear mount (I'm not factoring in the intercooler), but it's my opinion that as long as you run the turbo in its efficiency range, you'll still have lower IATs than the blower. Factor on an intercooler and it drops even more.
I'm not against fuel upgrades, tuning, etc.. But I think it's been pretty much proven that it's not 100% required at 7psi as others would have you believe.
Greg_Canada
New member
Sorry bud, again incorrect.
Back in the good ol' days, gadget was just a truck enthusiast that modded his truck and gave info to all the other 3.4 S/C'd users. You can see his old site here Gadget's 4Runner, of chronicaling the issues of the TRD blower and what he did to fix them. Then i guess he saw a business opportunity and started selling fuel upgrade kits, split second fuel/timing controllers, bigger injectors and a fuel pump. A few years later, TRD came out with a 7th injector kit which basically copied what Gadget did, and denied there was ever a problem. Later on, URD copied the idea of a 7th injector and came out with a kit of their own, but differing from URD, it is end-user tuneable. URD also sells a controller to tune the TRD 7th injector.
I'm not doubting that this motor can run boosted STOCK. You are just not getting the most out of it. 2rz/3rz's are typically good up to 6-7psi stock. any higher and you need fuel mods / head gasket upgrade.
Robb235
Senior Member
My point exactly.
steezemcqueen
Moderator
My truck has been SCed for the past 3 years and 40k miles. Manual trans, URD 2.2 pulley giving it 7-8psi, No fuel upgrades other than a boost enrichment module which isn't really a fuel upgrade.
No problems. Doesn't knock or ping under load and does not lean out at high RPM. I am sure i could get more power out of it with the 7th injector but it is by no means required.
My altitude probably makes a little difference but i doubt it would run much differently at sea level.
No problems. Doesn't knock or ping under load and does not lean out at high RPM. I am sure i could get more power out of it with the 7th injector but it is by no means required.
My altitude probably makes a little difference but i doubt it would run much differently at sea level.
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Singtoe
New member
That is sweet.
Here is what I propose.
I need to start a "BUY SINGTOE A FRONT MOUNTED TURBO CHARITY". If all the interested members of the forum donated $10 to me, I'll buy it and test it out thoroughly, and report on it.
4Running Daily
New member
I'd do that
snivilous
Senior Member
If you are at Denver's elevation you are over 2psi lower than sea level, which means you are effectively only boosting at under 5psi. I haven't read much of this and what people run without supporting fuel mods, but that's a pretty drastic difference I would think (over 30% decrease in absolute boost due to altitude, so how much boost the engine is actually feeling versus sea level). And of course, if you live in the mountains that can be an altitude decrease of well over 4psi.
Greg_Canada
New member
Yes, 100%, if he was at sea level, the truck would be a ping machine.
the 2.2 pulley at colorado elevation will act like a 2.37 pulley (stock) at sea level.
1985taylor1925
Senior Member
Why isnt anyone on the forum swapping a 1kd-ftv turbodiesel for their 5vz and then just modifying the system? that would be awesome
Greg_Canada
New member
Cause that would be ridiculously expensive, difficult, and would yield about the same power (but more torque) than a stock 5vz.
BlackWorksInc
New member
You can buy one already swapped and California legal for $18k! 
LoL
LoLYup, the altitude is keeping you safe.
Mine is manual trans, URD 2.2 pulley, 7th injector w/ URD tuning and larger fuel pump and it can still ping at low rpm high load. I just avoid the situations and down shift.
(But no high rpm lean out
)
Brian757
New member
Singtoe
New member
Well, would you try it on your Taco? Or would it go on the 2UZ?
I would (Strike that out) Will put it on the taco. I have really no space on the 2UZ. Just for hits and giggles, i might do a rear mounted turbo but that would be after the Taco is boosted.
Start sending the donations. I take credit cards...
Mr. B
New member
So you do agree? there we go, now wasnt that easy?
You said your tired of me whining? Whining like a supachargahhh?? WEEEP WEEEEEEEP!!!
Like I said, the day you actually BUILD something of have the experience in building it, add in your advice. If not, let clownmeat or the person who has it do the talking. You can read this and that from someones thread, but what IF that person didnt include all the horrible things that happened? - simply because they dont want to be targeted on their mistakes or the infamous, "Ive told you so". Listen man, I havent cussed out at you like you've done to me, I just don't want someone to read this and go out there thinking its fine and stuff not discussed actually happens to them. I'm not even raising my tone if you could actually hear how I'm writing this.
I agree with you somewhat, and you agree with me somewhat. The part that I DO AGREE, is yes, Toyota did an amazing job building what we own and that our motors can stoutly handle some additional power of a supercharger/turbocharger.
HOWEVER, this is a TURBOcharging thread, NOT supercharging thread. With a turbocharger, there are multiple pieces to make the puzzle, and to make it run right and reliable. I'm talking about even your exhaust size will affect how much PSI it'll actually run, the manifold, and things for longevity. I've had a turbocharged prelude, and with just increasing my downpipe from 2.5" to a 3", all of a sudden I had a car that ran perfect daily on 7lbs, to a boost spiking son of a gun that was no longer safe for my engine. A 7psi turbo motor WILL NOT have the same dyno sheet, or same HP/TQ digits as a 7psi supercharged motor. There needs to be some tune or fuel management for the turbocharger. A turbo is shoving air into the motor, with more air, there needs to be more fuel, if not, your running lean. We all know too lean is unsafe. Hence, the tune, bigger injectors, fuel pump and so on.
I sure would be concerned for the folks without a BL and routing intercooler piping (maybe it was clownmeat with the 2" BL and the charger piping fitting perfect in the gap). There's A LOT to a turbo setup. I just hope everyone realizes that.
like i said, I'm not yelling at you, or cussing you out like how you've been doing. I could, sure would like to, but it wouldnt help the situation or forum one bit. So i'll take the first step in cooling down.
Robb235
Senior Member
I'm not sure what you're saying we agree on? Your position appears to be that tuning is 100% mandatory with a turbo setup at 7psi. My position is that, while it is beneficial and good to have, it's not absolutely needed.
Not a whole lot of middle ground there.
Workin' on it bud. Excuse the mess...
But just because I haven't built it yet doesn't mean I can't intelligently add to the discussion.
Right, I agree with that. They may not have same curve or numbers. Spool time (or lack thereof for the SC), parasitic drag, IATs, etc. will influence the dyno sheet. But that doesn't really address the issue we're discussing. Please explain why a turbo is in more need of a tune / fuel upgrades than the roots blower. A turbo which has less parasitic drag than the blower (read: less load on the engine), and presumably lower intake temps... why is it more critical for the turbo'd motor to get a tune than the SC'd one? Please explain that point to me. I keep asking this question, and about the only response I get is something along the lines of "Well, it's a turbo, so it's different, so you MUST tune for it".
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No need for tune but is always beneficial. If the maf sensor can handle the amount of air flow being pulled in by the "lets call it a pump" then the ecu will know to add more fuel, preventing running lean. As soon as you exceed the maf sensor capacity of flow then you need a tune/piggyback/stand alone.
Since the stock truck can handle a trd supercharger than it makes sense that the maf can go beyond the flow of the stock motor so no tune is required for an "air pump".
Also worth noting, you can only do so much with the maf to "trick" the ecu into adding more fuel, eventually you max the injector duty cycle and run out of fuel pressure.
Since the stock truck can handle a trd supercharger than it makes sense that the maf can go beyond the flow of the stock motor so no tune is required for an "air pump".
Also worth noting, you can only do so much with the maf to "trick" the ecu into adding more fuel, eventually you max the injector duty cycle and run out of fuel pressure.
Mr. B
New member
I'm not sure what you're saying we agree on? Your position appears to be that tuning is 100% mandatory with a turbo setup at 7psi. My position is that, while it is beneficial and good to have, it's not absolutely needed.
Not a whole lot of middle ground there.
Workin' on it bud. Excuse the mess...
But just because I haven't built it yet doesn't mean I can't intelligently add to the discussion.
Right, I agree with that. They may not have same curve or numbers. Spool time (or lack thereof for the SC), parasitic drag, IATs, etc. will influence the dyno sheet. But that doesn't really address the issue we're discussing. Please explain why a turbo is in more need of a tune / fuel upgrades than the roots blower. A turbo which has less parasitic drag than the blower (read: less load on the engine), and presumably lower intake temps... why is it more critical for the turbo'd motor to get a tune than the SC'd one? Please explain that point to me. I keep asking this question, and about the only response I get is something along the lines of "Well, it's a turbo, so it's different, so you MUST tune for it".
Steve beat me to it. And Robb, I see no mess. I see goodies! Lol
I believe with the supercharger, since its from TRD especially, they designed it so it would not exceed the MAF sensor. Hard to say how much a turbo setup will output since the turbo builds we see now are homebrew kits.
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