Community Forums

clyon51 · 06-25-2012, 11:51 AM

They couldn't afford the fuel to get it out of the driveway

Roll · 06-26-2012, 06:57 AM

Quote:

Originally Posted by clyon51

They couldn't afford the fuel to get it out of the driveway

As I recall Prom they may not want to actually "go" anywhere. But your driveway might be awkward. LOL

Still, good idea to lock it up tight.

cb1000rider · 06-26-2012, 01:11 PM

What's wrong with a supercharged motorhome? Makes a lot of sense to me, especially at altitudes.

There's a ton of room on my Class-A chassis around that V10.

clyon51 · 06-26-2012, 03:50 PM

Let us know how it works out.

cb1000rider · 06-26-2012, 05:39 PM

Quote:

Originally Posted by clyon51

Let us know how it works out.

Buy one for me and I'll signup to test it.
There's nothing wrong with moderately tuned forced induction systems, especially when managed by modern EFI systems. We have timing control, fuel control, detonation detection and modern superchargers (Eaton) are actually fairly efficient...

Roll · 06-27-2012, 07:33 AM

Quote:

Originally Posted by cb1000rider

Buy one for me and I'll signup to test it.
There's nothing wrong with moderately tuned forced induction systems, especially when managed by modern EFI systems. We have timing control, fuel control, detonation detection and modern superchargers (Eaton) are actually fairly efficient...

It is also more to break and cause to you pull over and a mod of that significance could void your warranty if you still have one.

On the other hand, I supercharged two cars (Miata and Porsche) over the years and never had one break. Did have fuel mapping problems with the Porsche though; eventually sorted it out.

Roll

cb1000rider · 06-27-2012, 07:58 AM

Quote:

Originally Posted by Roll

It is also more to break and cause to you pull over and a mod of that significance could void your warranty if you still have one.
Roll

That's possible. Anything that puts down more power creates more stress. It's a fallacy, however, that bolting on "part A" will void your warranty... That includes superchargers. If the part did not cause the failure, the warranty still applies. Ref: Magnuson-Moss Warranty Act of 1975.

Again, I'm talking about appropriately managed power adders. Although it is possible to stuff more air into a motor, doing so without appropriately controlling fuel, timing, and airflow is bound to cause problems.

Roll · 06-28-2012, 04:18 AM

Quote:

Originally Posted by cb1000rider

That's possible. Anything that puts down more power creates more stress. It's a fallacy, however, that bolting on "part A" will void your warranty... That includes superchargers. If the part did not cause the failure, the warranty still applies. Ref: Magnuson-Moss Warranty Act of 1975.

Again, I'm talking about appropriately managed power adders. Although it is possible to stuff more air into a motor, doing so without appropriately controlling fuel, timing, and airflow is bound to cause problems.

Agree.

I did have a serious engine problem with the Porsche, worn main bearings. They pointed at the SC at said that was the reason. Extreme stress. I only ran 4-5 psi. I knew that using the car for instructional performance driving at MidOhio had put it through the ringer so I was unable to put forward a winning argument. Dumped the car and moved on.

Magnuson-Moss, sure, but they will still challenge the warranty; makers don't just roll over. So if you do the mod, be prepared to wage a battle if something goes wrong. There is the way it should work and then the way it does work. :-)

sparent · 06-29-2012, 01:54 PM

Thanks for all the replies. I think this is opportunity here to cut teeth and try something new and bring it back to the forum. Maybe I will get around to it at some point. I think a little boost in the mountains would be welcomed.. it doesnt have to be 15lbs, but a few pounds will go a long way.... Have you ever tried driving a Turbo Diesel without the Turbo? Just sayin, that Turbo is what makes it what it is. I think a Gasser could have some of that magic also.

cb1000rider · 06-29-2012, 06:33 PM

Man, just 1-2 psi in the mountains would make a huge difference.
As a few of you are aware, Toyota trucks were used on motorhomes. They're already anemic as trucks, I can't imagine them as a motorhome.

Anyway - same base motor with a turbo:

Bolting on a turbo was easy, it was replacing the 1980s fuel injection system that was the hard part. This isn't a motorhome, it's a 4-runner, but same concept and exactly the same motor.. The change made the 4runner entirely different in terms of drive-ability. No more downshifting to 3rd in the hill country. In the mountains, I'm sure the difference is dramatic.

Here's the superchaged version (earlier) that I did. The one is early enough that it was carb'd. Carbs won't run on inclines, so I adapted a TBI unit from a Chevrolet and again, used a programmable fuel injection system to control it:

The modern Eaton blowers are much better and much more efficient than the supercharger that I was using...

The ultimate "Toyota Motorhome" Would be a SunRaider (fiberglass, sought after and one of my motors... Just another 20-30hp and the ability to hold power in the moutains against altitude. It's on my to-do list, but my wife is spoiled by the 7mpg V10 class A.

I won't do the V-10 that we have now, mainly because I don't plan on keeping it for a long time. I would, however, strongly consider a 7.3L turbo rig if the right one came up...

Fiesta48 · 06-30-2012, 06:53 AM

Just what the world needs! A nitrous supercharged 20,000+ lbs. vehicle going 85 MPH (now legal) getting 2-4 MPG pulling a full size SUV driven by a non-thinker that can't stop.....

clyon51 · 06-30-2012, 08:49 AM

Quote:

Originally Posted by Fiesta48

Just what the world needs! A nitrous supercharged 20,000+ lbs. vehicle going 85 MPH (now legal) getting 2-4 MPG pulling a full size SUV driven by a non-thinker that can't stop.....

Time to form a new oganization:
N.M.H.R.A. (National Motorhome Hot Rod Association)

cb1000rider · 06-30-2012, 06:25 PM

Quote:

Originally Posted by Fiesta48

Just what the world needs! A nitrous supercharged 20,000+ lbs. vehicle going 85 MPH (now legal) getting 2-4 MPG pulling a full size SUV driven by a non-thinker that can't stop.....

I think you guys are missing (my) point... Or perhaps I'm not making one.
These are not hot-rods. They're simply adapted for reasonable performance. We're talking about motors that put out 80-90hp at the rear wheels. Boosting them by 50% simply means that they are reasonable to drive in hills. If I wanted a hot-rod, I'd drop in an LS-1.

Personally, adding something like this doesn't adjust my highway speed. It simply means that I'm not dropping into 2nd and holding it all the way some hill in New Mexico. Forced induction can adjust for density altitude...

The cost of having more power on tap is marginal. Using that power does cost, as you've got to keep that air/fuel ratio in line.

cb1000rider · 06-30-2012, 06:31 PM

Quote:

Originally Posted by Fiesta48

Just what the world needs! A nitrous supercharged 20,000+ lbs. vehicle going 85 MPH (now legal) getting 2-4 MPG pulling a full size SUV driven by a non-thinker that can't stop.....

I think you guys are missing (my) point... Or perhaps I'm not making one.
These are not hot-rods. They're simply adapted for reasonable performance. We're talking about motors that put out 80-90hp at the rear wheels. Boosting them by 50% simply means that they are reasonable to drive in hills. If I wanted a hot-rod, I'd drop in an LS-1.

Personally, adding something like this doesn't adjust my highway speed. It simply means that I'm not dropping into 2nd and holding it all the way some hill in New Mexico. Forced induction can adjust for density altitude...

The cost of having more power on tap is marginal. Using that power does cost, as you've got to keep that air/fuel ratio in line.