Re: Will Supercharger effect off-road performance?
Quote:
skersfan previously said:
My only knowledge of a SC and Rock Crawling was the All Pro Hammers event. Billybongo had one and he snapped both the CV and the ring and pinion on the second obstacle. It delivers a lot more power instantly and these vehicles do not have the storngest 3rd member.
I had wanted one up until seeing that happen.
Could have been driver error, but all of us make mistakes. A lot more potential for damage it seems to me.
But if I was not doing the type of trails we have here, I would certainly have one. It was my intention when I bought the truck.
But I am very happy with the performance the way it is and I do not have the added worry at this time.
True. One thing to take into consideration when adding a lot of horsepower is that the other parts were not built to take this kind of horse power. But a careful driver who understood the limits of the vehicle would certainly be okay with the s/c.
Re: Will Supercharger effect off-road performance?
Quote:
skersfan previously said:
My only knowledge of a SC and Rock Crawling was the All Pro Hammers event. Billybongo had one and he snapped both the CV and the ring and pinion on the second obstacle. It delivers a lot more power instantly and these vehicles do not have the storngest 3rd member.
I had wanted one up until seeing that happen.
Could have been driver error, but all of us make mistakes. A lot more potential for damage it seems to me.
But if I was not doing the type of trails we have here, I would certainly have one. It was my intention when I bought the truck.
But I am very happy with the performance the way it is and I do not have the added worry at this time.
Quote:
layonnn previously said:
True. One thing to take into consideration when adding a lot of horsepower is that the other parts were not built to take this kind of horse power. But a careful driver who understood the limits of the vehicle would certainly be okay with the s/c.
Good concerns and observations, especially/but since several FJ's lost their 3rd's last weekend in Moab (4/40) and none of them had a s/c. 90% driver and knowing when and how to use all that juice.
Re: Will Supercharger effect off-road performance?
Superfly all the comments posted so far are right on target. However I disagree with a couple points about the added HP causing mechanical failure.
I am on my third replacement set of ring and pinion gears, and I'm supercharged. So I will do some explaining here.
1. The S/C is awesome. Get it. You will laugh yourself silly terrorizing the roads like layonn says.
2. It has no negative effect on your offroading, because you don't use HP offroad. As many here will tell you, if you are having to floor it offroad then you are doing something wrong. If you are crawling with the pedal down you are seconds away from breaking something.
If snapping a ring and pinion was caused solely by superchargers you would see it happening on the highway. The strains that cause ring and pinion failure are twisting and torque loads far greater than what the engine and clutch can deliver. As you probably know, large tires and large rocks break things. When the two are going at dramatically different speeds and then meet suddenly, get out the tools.
Here's how to break your CV's in about 5 seconds. Get a front wheel up in the air, gun the engine to get the wheel spinning fast, and then let it suddenly come down and hit a rock. Do this in a Hummer and it usually removes the whole wheel, spindle and lower arm as well. To break your ring and pinion, do this with a rear wheel.
My ring and pinion debacle over 10,000 miles was caused by a bent housing that has been bending my third member in some way. This has caused three sets of gears to whine for a few months and then eventually explode. Because I am not a big crawler, more like a desert runner, I assumed my loads would not be that great. But Demello told me that higher-speed shock loads are actually greater, since you are doing a lot of that wheel-spinning thing and then suddenly contacting the road.
Because my axle is damaged anyway, I'm ordering a Currie Ford 9-inch which will solve the problem but at pretty high $ cost. The only other FJ with one is the ex-Donahoe Baja winner and it was not supercharged.
So yes, you may need driveline reinforcement eventually, but not because of the blower.
Re: Will Supercharger effect off-road performance?
Quote:
layonnn previously said:
x2 If speed is in your idea of offroading, go super charger.
If you are doing tight trails and traversing rocks, rarely are you up to high enough rpm to take advantage of the supercharger. I find it to be more of a onroad mod.
I think you have a supercharger confused with a different forced induction part called the turbocharger. Superchargers are different b/c they run off of the pulley system (crank) rather than a turbo which runs off of the exhaust gas, hence why there is "turbo lag". A supercharger does not have much lag and is known for its immediate torque. They are big in autocross events b/c of that low-end power, and are known for their torque curve. Good stuff, especially for power needed to get over large rocks or obstacles. In that case you arent looking for hp, you want ft/lbs (torque).
As for adding forced induction to a na (naturally aspired) vehicle, (i.e. s/c) you arent going to boost as much as you would for an engine that was built for a s/c. Now as for if the parts are going to break; its always the weakest link. I am unfamiliar with these vehicles in particular, (just now getting into some of the offroad side of the spectrum; besides autox and rally with my subaru wrx), but I would find that weak link and substitute it out for a stronger one. But if toyota made the s/c then, I think you would be good to go, and they probably have a reflash for your ecu to get more out of it and to function properly. They probably have a fuel inj. upgrade, or one you can pick up that you will need to complement the boost so you wont have any knock.
(To the OP) Oh and one other thing. I would get a larger diameter exhaust to even out the intake/exhaust. Your car needs to release all of that back pressure if you decide to add a s/c.
Re: Will Supercharger effect off-road performance?
Quote:
Air2air previously said:
Superfly all the comments posted so far are right on target. However I disagree with a couple points about the added HP causing mechanical failure.
I am on my third replacement set of ring and pinion gears, and I'm supercharged. So I will do some explaining here.
1. The S/C is awesome. Get it. You will laugh yourself silly terrorizing the roads like layonn says.
2. It has no negative effect on your offroading, because you don't use HP offroad. As many here will tell you, if you are having to floor it offroad then you are doing something wrong. If you are crawling with the pedal down you are seconds away from breaking something.
If snapping a ring and pinion was caused solely by superchargers you would see it happening on the highway. The strains that cause ring and pinion failure are twisting and torque loads far greater than what the engine and clutch can deliver. As you probably know, large tires and large rocks break things. When the two are going at dramatically different speeds and then meet suddenly, get out the tools.
Here's how to break your CV's in about 5 seconds. Get a front wheel up in the air, gun the engine to get the wheel spinning fast, and then let it suddenly come down and hit a rock. Do this in a Hummer and it usually removes the whole wheel, spindle and lower arm as well. To break your ring and pinion, do this with a rear wheel.
My ring and pinion debacle over 10,000 miles was caused by a bent housing that has been bending my third member in some way. This has caused three sets of gears to whine for a few months and then eventually explode. Because I am not a big crawler, more like a desert runner, I assumed my loads would not be that great. But Demello told me that higher-speed shock loads are actually greater, since you are doing a lot of that wheel-spinning thing and then suddenly contacting the road.
Because my axle is damaged anyway, I'm ordering a Currie Ford 9-inch which will solve the problem but at pretty high $ cost. The only other FJ with one is the ex-Donahoe Baja winner and it was not supercharged.
So yes, you may need driveline reinforcement eventually, but not because of the blower.
Well said. And right on. Impact or Shock loading is significantly larger than typical slow speed loading that you would see while crawling.
i.e. compare the suspension on a professional rock crawler to that of a professional class 1 SCORE car.
Plain and simple, Toyota is a good car manufacturer and has excellent engineering depth. They won't endorse a part for a modern car that has the potential to adversely affect the rest of the vehicle's design. Trust them, buy the supercharger. Now.
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