The big thing for me is that I personally want 11.5:1 AFR tapering to 10:8 (maybe 11:1)or so at the redline. These targets are just that. I have not tuned a Cruiser yet, but think anything in the mid 12s is too lean under moderate boost. My plan is to get precise fuel & timing control with the stock fuel system.
Wowsers!!! Why would you want the thing to run so rich? Yer gonna lose power with anything outside of say 12.0:1 to 13.0:1 I'd love my rig to simply stay at the 12.6 that it initially goes into Open Loop with. That would be wonderful but it creeps richer and richer the longer you hold the throttle open. Anyways, I think you are actually gonna throw away alot of power and also alot of fuel if you're striving for 10.8's. Something to think about.
Holy crap, thanks for all the interest, ideas, & concerns. Nator- I checked the rear inside carpet area after pulling a good hill under boost & it's warm, but not hot. I unbolted the stock spare tire carrier & re-welded it a few inches higher. This is what the turbo is bolted to. I should not have any off road clearance issues, it's tucked pretty good. There is room for a slider or plate if I go nuts, but I probably won't beat it off road. I intentionally left a space between it & the floor so I don't cook the interior. Now you have me thinking... I could install a aluminum sheet above the tire mount.
Our shop just installed a STS kit on a 350Z. It came with a K&N outerwear filter cover. You would not believe how water resistant that thing is. I would use one of those & leave it if I was goin Mall Queen. I do go offroad every chance I get though. My plan for the intake is pretty solid. I have all the parts for the bottom, but nothing for the outside yet. I will go straight out of the turbo into a sealed airbox. From there I go up into the left quarter where the jack is & out the left quarter to a (don't laugh) home brewed snorkel.
Landtank- I thought of running a smaller pipe to the turbo. I don't know if I made a mistake or not on that one. EGTs would probably not be affected by a 2.5" pipe & spool would be better for sure. It helps to have heat on the turbo inlet. All of the other vehicles I've done had 2.5" pre-turbo. I just figured (read guessed) that a 4.5 liter would have insane flow at 10psi and above. It sure would have been easier! 3" was tough with all the mandrels. Funny, I always tell my customers bigger is not always better. LOL
Cattledog- These pics were taken just before completion. I have added the oil line & a Turbo XS HPBC manual boost controller & a RFL blow off valve just before the MAF. It doesn't Recirc. My shop has installed several Link ECUs. The early stuff was good, but it is now dated and the new G3 platform has lots of new technology & a super fast processor. The Subarus that run this system are smooth & responsive just like stock!
The turbo is oil only It was however FREE99.. Trying not to sound cheap.
Parabola has it correct as I've seen it with most of the cars we have tuned. His post is realistic in most cases, I would never tune for 13:1 under boost. 10.8:1 is what I use 20 to 30 psi in a Subaru for a redline target only. They tend to be safer tuned crazy rich at the redline. Normal conditions under boost I will try 11.5:1 I honestly, have no idea what to expect because the combustion chamber is much different in a 4.5L 80.
Turbocruiser- You don't have any knock at 12.6:1? How much boost are you seeing at that time just before switching to open loop? Can you share your ignition timing settings? Thanks!
We will need to have a knock gauge or light when we begin to push the safe limits of these trucks. I am not sure that I want to run too much boost. I tried 7psi & it felt sooooo good. I will run more after break in. I am really happy with the spool. It is great in low 4 & doesn't feel like it lags at all. It comes on smooth & seems to be perfect. Maybe I got lucky with the turbo size. I couldn't find any specs on this turbo anywhere. I sure would have liked a Garrett. Oh well. -Andy
Landtank- I thought of running a smaller pipe to the turbo. I don't know if I made a mistake or not on that one. EGTs would probably not be affected by a 2.5" pipe & spool would be better for sure. It helps to have heat on the turbo inlet. All of the other vehicles I've done had 2.5" pre-turbo. I just figured (read guessed) that a 4.5 liter would have insane flow at 10psi and above. It sure would have been easier! 3" was tough with all the mandrels. Funny, I always tell my customers bigger is not always better. LOL
Safari rated the stock exhaust for boost up to 12lbs. I think with this sort of setup that would be a reasonable target and the smaller pipe would work quite well.
Yeah, the big advantage to a larger exhaust such as turbocruisers is lower EGTs. Doesn't really apply to mine though. Oh, plus the coveted straight 6 rumble (LOL). I really should have gone with the 24" long 4" Magnaflow muffler. Not to sound like a wuss, but this thing is a bit to hash in town. It sounds really cool under boost though, I don't think I'll change it. The cool thing is, the tires are louder than the exhaust on the highway. My wife likes it. She's had it all week
I never kept track, but prolly $1500 in parts. Countless hours though. The turbo was free from a friend. The Unichip (not yet installed) was the most expensive part.
Nator- The air actually sucks through the outside vent. It is good, but not perfect yet. I can hear some air inside the truck getting around the box above 7 psi. Still working the bugs out before I put the interior back together.
Just for kicks I ran the truck hard for a couple days without the box. The air cleaner open to the inside of the truck. It was absolutely unbearable!! I took a cheezy video with sound on my cell phone because it was so insanely loud. The wastegate was so loud through the intake, I couldn't even hear my BOV. I wish I could post it. It's stupid....
Yeah, I'm gonna submerge the turbo. It won't be that hot back there. It cools very rapidly, because the exhaust is so short EGTs come down rapidly also. I'll let everyone know if it cracks.lol It will only see deep water once & a while. Honestly, the filter under the truck would fine if I never went off road.
Hey guys, I've been a real stranger lately to Mud. I've been anxious to make some changes, but mostly just the addition of some gauges & I just picked up a used York compressor. The truck is working very well I'm happy to report . I haven't been tinkering with it much cause it has been very reliable. Mileage has been about the same as without the turbo . I have been off roading every other weekend. So, Just really enjoying the family time and the Cruiser! The turbo has been submerged on several occasions & has not given me any trouble.
Just bought a new Video camera. I'll have to make a couple videos... Still have a new UniQ in the box. I guess that should be next.
AW. Almost forgot. My intake tube collapses under the truck if I run over 8 psi. There is a soft convoluted section that needs to be hard pipe. No problems with flow at low boost though. I'll be back soon guys. I can't look at all your posts without wanting to put $$ into the cruiser. -Andy
I'm picking up my tacked together manifold on Thursday. It will hopefully fit the head and I need to position the flanges for the turbo and waste gate for final build.
Right now it's a blank check project. My fabricator couldn't guess what the price would be and I just committed to whatever it costs.
Definitely the second costliest piece in the build next to the turbo.
I was actually going to ask a question in regaurds to this. I guess someone beat me to it.
I have a 87 turbo 4runner that if I can't sell is going to be donated to some cause. I had a 88 runner with the POS 3vz ( toyota biggest flop ever) that I was running 35's on, i was planning a swap but sold the 88 first. Now I am stuck with the 87 only 143K but a possible bad tranny.
Can I use the turbo off the runner or would I mess up my engine.
I was actually going to ask a question in regaurds to this. I guess someone beat me to it.
I have a 87 turbo 4runner that if I can't sell is going to be donated to some cause. I had a 88 runner with the POS 3vz ( toyota biggest flop ever) that I was running 35's on, i was planning a swap but sold the 88 first. Now I am stuck with the 87 only 143K but a possible bad tranny.
Can I use the turbo off the runner or would I mess up my engine.
anybody talk to fj80psi since his last post (Jan 08?)
I sent him an email inquiring how things are going.
hopefully the email gets to him and he posts an update.
It was however FREE99.. Trying not to sound cheap.
NICE
