Ya but that is only for the 4 liter V6. It would be completely awesome for the 4.7 though!!
This guy turbocharged his 4.7 v8 4runner
- Thread starter derekdevasia
- Start date
Ya but that is only for the 4 liter V6. It would be completely awesome for the 4.7 though!!
97hb
New member
Wish they had 03-04 support. Dam hall sensors lol. Also stock ecu will not support fuel for boost so please don't try it. It may run fine in vac but not in boost, too much timing not enough fuel lol.
macgyver_ga
New member
My BMW has 2 small turbos - 1 per 3 cylinders (N54 Engine), there's still plenty of lag with this setup. It's just the nature of turbos.
I'd really like to see what Audi is doing with electric turbos. Now that has the potential to eliminate lag.
Robb235
Senior Member
Turbo lag has everything to do with properly sizing the turbo to the engine and application. A poorly matched turbo can definitely lag.
macgyver_ga
New member
Agreed. Also, some people get too tied up in worrying about "turbo lag" and forget about how awesome it is when it spools up and puts you back in the seat. There's always a trade off. Small turbos will spool really fast but they'll fall on their face at the top end.
541joseph
New member
Do they sell any aftermarket variable geometry turbos? Those things are pretty much lagless and awesome pawsum!
but they have major issues
Nathana92
New member
MapECU made a wiring diagram for me for the 03 V8 for their MapECU3 piggy back. A good tuning shop can wire it in and get you set up. I'm running stock fuel system with the TRD 9th injector and a step colder T-Stat and spark plugs. So it can be done it just takes some research and money.
BlackWorksInc
New member
I don't know about the Diesel world where these originated (if I remember correctly) or the aftermarket scene (I have never seen an aftermarket one myself), I do know on a lot of the turbo failures on the more modern VGT (Variable Geometry Turbos) equipped vehicles are also GDI engines. In the case of BMW units, the turbos tend to burn-out/die mainly because of the GDI injectors being garbage/cracking and leaking fuel into the turbos which overheats them. I do know some of them have electronic actuator issues and such, but it seems most of the failures seem to be a symptom of an engine issue and not a direct failure of the turbo (like catalytic converters.) I could be completely wrong here as Toyota doesn't have any VGT engines in North America at the moment and I don't exactly get to tear apart every BMW and/or other car with them to see the root cause. This is mainly based on what I have seen and heard from others who have worked on these types of turbos.
wnelax04sr5
New member
a good article about the ford 6.0 on vgts, issues, and cleaning
Fixing Ford Turbo Troubles Early: Diesel Power Engine
BlackWorksInc
New member
Yeah but those are the craptastic 6.0L Powerstrokes that have oil pressure issues and injector issues so that doesn't surprise me. 
Most of the diesel techs I have met love and hate those engines; they love the money they bring, they would never own one. lol
Most of the diesel techs I have met love and hate those engines; they love the money they bring, they would never own one. lol
541joseph
New member
Yeah but those are the craptastic 6.0L Powerstrokes that have oil pressure issues and injector issues so that doesn't surprise me.
I can agree with that statement. all I have worked on is the 6.0 so I'm unsure about the gas engines that are running them. Just like the idea of a good old fashioned turbo
wnelax04sr5
New member
Yeah but those are the craptastic 6.0L Powerstrokes that have oil pressure issues and injector issues so that doesn't surprise me.
the 6.0's are so hit and miss, my uncle had one that was problematic from day one, all the usual issues that 6.0's have. the landscapers who have their shop next to my work have a fleet of 6.0's, one of them has over 300k with nothing but oil changes and tire rotations
None of the BMW gasoline engines use VGT technology in their turbos that I know of (it stands for variable geometry turbine BTW). The turbos are journal bearing standard units that tend to last the usual 80-120k miles.
BlackWorksInc
New member
DOH! You're right, VW/Audi/Porsche is who I am thinking of! :dizzy:
Yep, some Porsches have them starting with the 997 turbo. They aren't very reliable from what I hear, and Garrett OE units (not even through Porsche) are like $2.5k/ea IIRC. So $5k for a pair of unreliable turbos. But hey, they get just through the warranty period... most of the time. German engineering at its finest (I've been burned quite a few times by German cars and German engineering).
As far as fueling, the cheapest thing you could do would be to get something like an Apex'i S-AFC2 and some slightly larger injectors like 30-40% larger. Use the AFC to turn fueling (really your MAF signal) down across the board roughly that amount. The kicker is that this pushes things into lower load parts of the fuel/timing maps, so your timing goes WAY advanced. In cars with adjustable timing, you just crank back on the cam angle sensor/distributor something like 10-15 degrees and just deal with the somewhat lazy response and slightly worse gas mileage out of boost. If you could get it to work, you could run roughly 4-7 psi or so depending on the injectors, timing, compression, and turbo of course.
I don't think there's a way to retard our timing mechanically, so you'd probably be better off getting an AEM FIC and hacking into the harness.
wnelax04sr5
New member
a buddy of mine has an HE351 on his 01 24v that came off an 06, its an awesome turbo for that truck
