I don't know... I've never worked with a QR25, I don't know anybody that's tried to turbocharge one. There's a lot of stuff you'd have to sort out, like engine management for example. There's no ECU available for the QR25. And then it can't take too much forced induction because it's an open deck block, it has thin ring lands, soft valve springs... there's a lot to be figured out.
Since no one has done it yet that I know of (though area 51 has a supercharged one?), there's one pretty safe way to do it; basically replace a lot of the internal part of the motor. This would mean the pistons, rods, and valve springs. I don't know if anything else needs replacing yet. I guess if you don't go over the stock rev limit, the stock valve springs would be okay; you'd have to worry about hitting it a lot with a turbo though, especially in the first 2 gears. You'll also probably need to sleeve the block. For the engine managment, since JWT doesn't have a program out, the safe bet would be a stand alone system. You could get away with those black boxes but I wouldn't try!
Well, there's a first for everything so they will be a first turbo QR someday.
'01 Frontier S/C 4wd Crew Cab with AUTO tranny
I've owned my truck for 4 years - and just the other day it had go like I've never seen before. Then the next tank of gas the power disappeared again. So I started trouble shooting and need a bit of help.
Problem: 1 or 2 runs from warmup...
Having some problems with the AFM of my '89 S13 Ca18det...
It is running a AFM of around 12.0 idle, 13.4 low trottle, 10.0 or lower on WOT.
stock exhaust (for MOT) or normally a 3".
Stage 2 chip (brand unknown)
AEM AFM wideband
What I have...
Just wondering how much work it would be to turbo this engine, considering how little space is in the engine compartment. If the latter is possible, I'd also like a little help finding reliable power for it at about $1300.
New member looking for some help.
My 1999 Terrano is suffering from power loss under acceleration and struggles up an incline. The MIL is not on.
I have endured MAF sensor failure (80k miles) and fuel pump failure (110k miles), and the power loss is not as bad as either of these faults...