Kazuma/TRD supercharger

[Beowulf]

He did all of the above to his new rig including the supercharger. Ever since he put in on he has had problems starting with overheating.

Tobin,
Welcome to IH8MUD and kudo's for a 1st post that was succinct and well written.

I have little knowledge with the S/C but I'll throw in my 2c on a couple of areas.

1. Your 260HP Runner should smoke a S/C LX. Don't expect otherwise.

2. Brand new completely stock 80 Series will get approx 16 mpg on the highway. There is no way a winched, lifted, tyred, bumpered 80 will get 16 mpg. The 11-12 mpg is normal so don't expect otherwise.

3. You say he can't tow anything but you don't give a reason. If it's lack of power then that's one thing. If it is because he has to back off due to overheating then that's another issue (potentially.)

The overheating/cooling system maintenance has been well covered above.

The lack of power has been covered but I'll add one more possibility and that's the spark advance. Is it possible that someone retarded the timing to address detontation? Check this to be sure. The knock sensor could be retarding the advance to the point where there is a noticeable loss of power. If your grandfather is as old as I am he can no longer hear the pinging even though it may be there. I'm guessing it is pinging since you mention he runs 87 octane.

Good Luck and keep us posted.

-B-

 

[YellowJacket]

First: Thanks for the welcomes and all the awesome responses. I am a member of roughly 10 Toyota BBS and your info and responses are very informative and quick compared to some forums that I am involved with.

Just for the record, my grandpa doesn't run 85, he did once or twice to see if he would notice a difference while it is running so poorly. We only have 91 around here, so that's what he runs.

Let's here what you guys think about this one. We only found it so quick because we had another 95 LC that had the same S/C and a number of issues. One of his problems and apparently one or ours is BACK PRESSURE. TRD says 4 psi is max. We were running 12. I took off the back cat and it dropped to about 6. I took of the pipe from the manifold that has the other cat and sure enough it dropped down to 2-3. The whole time he was running about 5.5 lbs of boost. Now, both his cats look good which is the weird thing. The other guys were completely gone. The other guy had a couple chunks left in the cats and the rest in his muffler. My Grandfater has a little over 100,000 miles on this motor.

Yes my grandfather's name is Landon Beales. I didn't work at Larry Miller Toyota until after he put the s/c on and he heard a lot of good things about Will down at Mark Miller so he took it there. That's too funny.

Still a little concerned though... As I was test driving it even with all the back pressure problems gone it still didn't have very good acceleration. Yes, I did forget to turn off the O/D and maybe it will work better with the proper exhaust on. It almost felt like I had to wait for it to boost like on my 4Runner with the Supra Turbo motor.

For starters, I am going to send him over to Master Muffler and get a better exhaust system put on. Exactly what size do you guys recommend and I'll have to look at the situation again to find out if it has to be done, but a header. I would assume that a header as well as a whole new high flow system should be added. Comments on that?

I needed to mention that he only really overheats when he is towing heavy loads up canyons. It bubbles out of the overflow. We got him a new factory rad cap which seemed to help a little, but then winter and now no power. I will definately check everything mentioned especially the headgasket. On my straight six it is highly recommended to run a metal hg. But I am running 10 psi and soon more. Is that nessesary on his?

About gas mileage: What were you guys running before and what now with the s/c? WC Toyota saysyou can run a pulley as small as 2" to get a max hp of 385 and 434 ft lbs at 12.5 psi but you would probably have to change up the fuel system and do something with the ECU? I'm sure you guys don't recommend that but has anybody tried a lot smaller one and what other mods had to be done. Tell me about the intercooler. How did that affect the performance. It was a supercharged system right? ETC. For this current setup, should we grab a walburo fuel pump?

Something that we need to look into is 160 degree t-stat. The guys at my work mentioned that that is nessesary. I don't see it on TRD's site? Can you get those aftermarket? I should think so. And what's up with the "1 range colder plugs"? I am fairly new to the auto industry and have never heard of those. Is that what they are called? I definately have a list of items now...

Thanks again.

 

[YellowJacket]

By the way here's the most recent pic of my Toyota. I had to majorly reduce the size to make it "postable" so it may be poor quality now.

 

[YellowJacket]

Before...

P.S. What is the deal with posting pics? I will search.








What do ya think Howard?

 

[concretejungle]

Nice rig. On the bubbles in the overflow.........that's a bad sign my friend; indication of a blown head gasket. Did you do a compression test, if not i would.

 

[Trunk Monkey]

If the 95 you're talking about is Deiter's (sp?) then there's a bunch of other problems with that truck other than back pressure.

When he came and drove my truck, it sounded like he tows a fairly large trailer. It may just be too much for the truck to handle. For mileage, I don't think there's any big difference. I know of trucks w/out a supercharger that get worse mileage than I do with. The 160 degree t-stat is a TRD item, there was some reason against installing them, can't remember what it is now.

Intercooler info: http://home.comcast.net/~csfillmore/Cooler.htm

 

[elmariachi]

Nice rig. On the bubbles in the overflow.........that's a bad sign my friend; indication of a blown head gasket. Did you do a compression test, if not i would.

If you are getting fluid out of the puke jug and its at or below the full line when cool, that's a bad sign. I still don't understand the backpressure issue. You say that there was significant back pressure that was reduced when you removed the cats, but yet "they look good". Let's face it, if those cats are driving backpressure up that far and 4 is the Toyota number, that's a problem.

I think you have numerous potential issues here that are going to require some serious diagnosis. If you are intent on replacing the exhaust, a quick way to get high-qaulity stainless for the cat-back section is to get the Borla for 95-97 Cruisers. Several web suppliers have them for under $400. I have no idea where to get new cats, but I am sure CDan can help or others here can make recommendations.

But I gotta tell ya, I think something else...headgasket/faulty wiring....may be at play here. I think you are treating the symtoms and not the cold.

Oh, and on the issue of changing pulley's: You can't be serious that you guys are contemplating boost mods on a system that is failing like this are you? If its failing, struggling and overheating at 6 lbs of boost, just wait until you jam 10-12 lbs at it. You won't need to go looking for the problem because its going to find you in a matter of miles.

Jim

p.s. Remove the blower assembly and send it to me, I'll buy it.

 

[Tools R Us]

Gadget over at Trail Talk has done some great tuning research on the 3.4 TRD supercharger setup, some may crossover to the Cruiser. His fuel pressure regulator trick looks promising to help with high boost lean running? The rest of his site is a good read.

http://www.gadgetonline.com/fuel.htm#Free FMU:

 

[YellowJacket]

Well looking inside the cats they look ok, but I guess they would have to be bad if it gets better as I take them off. That's funny, it was Deiter's LC that we did a bunch of stuff to. He's not active on this is he? Pretty interesting guy?! I was almost interested in buying it, almost.

No,we aren't thinking of replacing the pulley. I just thought it was interesting and seeing if anybody had any comments that had done it.

I believe you guys may be right about the headgasket, I hope not, but it would only make sense. I will find out shortly.

What about the exhaust? What size do you go on Cruisers? And what about a metal headgasket? I will check out some other sites also.

 

[cruiserdan]

My friend that modified my 3 inch pulley took some measurements and calculated that the absolute minimum diameter that would clear the nose-cone was 2.7 inches. It appears that there is about a 1 lb gain per 1/10th inch
diameter change. That would end up around 10-11 lbs more or less.

You would need to do a whole bunch of stuff to keep the motor togther with that much boost from a blower. Turbos can dial up more.

 

[YellowJacket]

My friend that modified my 3 inch pulley took some measurements and calculated that the absolute minimum diameter that would clear the nose-cone was 2.7 inches. It appears that there is about a 1 lb gain per 1/10th inch
diameter change. That would end up around 10-11 lbs more or less.

You would need to do a whole bunch of stuff to keep the motor togther with that much boost from a blower. Turbos can dial up more.

Thanks, that is some good info.

Do you know about the exhaust? What is stock size and what are you running? And did you go to one cat instead of two?

 

[Trunk Monkey]

What about the exhaust?

I've got the 2.5" Borla with one cat and one ugly resonator tail tip.

If you caught Andre's post over on Pirate about them blowing up a 1fz, that was Deiter's. And to make the world even smaller, I'm the one that bought your black truck box for the back of my 4runner. Didn't catch it was you until I saw the pics of your truck.

 

[cruiserdan]

Thanks, that is some good info.

Do you know about the exhaust? What is stock size and what are you running? And did you go to one cat instead of two?

Mine is OEM front pipes, OEM side-by-side cats, OEM Y-pipe and a Borla muffler with a custom tail pipe to conform to the Slee rear bumper.

 

[YellowJacket]

I've got the 2.5" Borla with one cat and one ugly resonator tail tip.

If you caught Andre's post over on Pirate about them blowing up a 1fz, that was Deiter's. And to make the world even smaller, I'm the one that bought your black truck box for the back of my 4runner. Didn't catch it was you until I saw the pics of your truck.

Holy crap dude, what's up! How's the box doing? So how do you like your exhasut. I thought that 2.5" was the stock size. I called Master Muffler and talked to them about a 3" with 2 cats and a Magnaflow. What does everybody else have?

 

[LX_TREME]

And mine's JDM Hi-Polish Dual cat back exhaust system - 2.78 piping

 

[MTNRAT]

From what I understand you don't get much if anything with bigger exhaust and the supercharger. Just more noise and a drone that drives you nuts on the hwy. Just my experience with pissing around with the exhaust. Went back to stock front to rear.
Cheers,
Sean

 

[LandCruiserPhil]

2" "Y" into 3", 1 cat , Flowmaster, and large resonator

 

[YellowJacket]

Thanks Sean and Phil. So is it not nessesary to keep two cats? Of course the exhaust shop says you do need both. Has anybody done any research oh LC exhaust systems? I have been trying to find LC sites but I think I have a virus and it's been difficult.

 

[fasteddy]

The truck has about 200hp-ish stock, right? If the stock size is 2", the x-section area is 3.14sqin (pie are squared). If the s/c truck is 300hp-ish, you need 1.5x the x-sect area, or 4.7sqin., to flow the same velocity with a guestimated 1.5x the air flow. This ignores the extra volume from higher combustion temps, and assumes the same engine performance at 1.5x the airflow.

4.7sqin is about a 2.5" pipe, so you'd put a 2.5 in if stock was a 2.0. To make life a little simpler, multiply the stock diameter by the ratio of s/c hp to stock hp (1.5 in this case), then take the square root of the answer. Multiply times 2 for the new pipe diameter. I'd add a quarter/half inch for insurance to cover higher inefficiency (i.e., less hp/cfm of airflow) in a boosted engine with the same valve and runner and port and plenum sizes, and to get the same relative benefit of a freer flowing larger exhaust on an NA engine. You also get the same type of benefits from Helmholtz exhaust tuning on a s/c engine as you would with a well designed set of headers on an NA motor. Ditto on intake tuning. Too bad you have to lose the resonators to install the s/c...

 

[Beowulf]

fasteddy,
Yellowjacket's question about the exhaust sizes was posted over 30 months ago. Somehow I don't think he has been watching this thread every day waiting for an answer before he completed his exhaust system.

Nice try though.

-B-