SUPER CHARGED GASSER??

[mike_s]

Engine longevitiy on any newer ish vehicle really isn't a concern diesel or gas....Wouldn't really use that as a point of comparison.

This is true when the engine is run within the designers intended parameters. The minute you add aftermarket items you generally push it outside of those parameters. IE running higher RPM for extended periods might not be an issue with a gass engine, but put forced induction on top of that...an engine designed to run at 300 HP all day long wont generally be happy running at 450 HP for the same amount of time. Case in point: early GM vortech engines had a plastic rimmed "O" ring intake manifold gasket, worked fine when subjected to vacuum forces, however when subjected to pressure (read boost) they simply dont hold up for long. Whereas a late model direct injection diesel engine is intended to run with boost and everything affected is designed to handle the stresses added by it.

In my humble oppinion, unless all you tow is a pair of jetskis or sleds on weekends now and then, you couldnt give me a gasser to tow with. There is a reason that semis and transport trucks dont run extreemly big cube gas engines...

 

[Dogmeat]

I don't think it would pass current emissions and fuel economy requirements.

Great motor but lots of people getting rid of them because of fuel economy was horrible.


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They could make the 8.1L pass the NLEV standards any time they wanted to.

That motor doesn't get appreciably worse mileage than the 6.0's do on the highway, my experience was that I got 14.5 with my 8.1L and 15.5 with my 6.0L in the same exact truck configuration. In town, yes the 8.1L does about 9 where the 6.0 does 12 ..... towing, they're virtually identical but the 8.1L pulls a lot better than the 6.0.

If they would do something like a VVT/DOD 8.1L it'd be awesome.

 

[Jaynelson]

This is true when the engine is run within the designers intended parameters. The minute you add aftermarket items you generally push it outside of those parameters. IE running higher RPM for extended periods might not be an issue with a gass engine, but put forced induction on top of that...an engine designed to run at 300 HP all day long wont generally be happy running at 450 HP for the same amount of time. Case in point: early GM vortech engines had a plastic rimmed "O" ring intake manifold gasket, worked fine when subjected to vacuum forces, however when subjected to pressure (read boost) they simply dont hold up for long. Whereas a late model direct injection diesel engine is intended to run with boost and everything affected is designed to handle the stresses added by it.

No different than putting chips, different turbos, etc on a diesel really. Just for example, Toyota makes an s/c for the tundra 5.7l that bumps it from 380hp to 505hp and still covers it on warranty. Obviously they are confident it won't puke the motor. In general, all modern motors are built a lot tougher than years ago.

 

[niles]

Thanks for the input everone, I am learning alot. I appreciate the opinions without bashing. Lets hear some more.

 

[polarisfornow]

This is a little off topic but I have in the works a custom shop in my town doing a turbo on my hemi ram. This will be the second one that he has done and we are shooting for a mild 480hp on 8lbs of boost. This will be on 91 fuel and all stock internals except for a cam lifters and retainers that I had already done. Because of the cam my truck should be a little hotter than the truck that was already done. The other truck that he did gets a solid 18-20mpg empty running 75 on the hi-way. I will have about 3k into this kit.

480hp may not sound like much to you diesel guys but remember my truck will weigh about 2k less. To me it was far and away the best bang for the buck.

 

[Mafesto]

Toyota makes an s/c for the tundra 5.7l that bumps it from 380hp to 505hp and still covers it on warranty.

That in a Sequoia would make a great biler rig!

 

[thspepper@gmail.com]

Here's my 2 cents. (most people only think it's worth 1 cent)

I have a 03 dmax stock, love it, will never buy a gas truck again. I've driven 100's of time from utah/idaho to alberta. I put it on cruise at about 80 mph. Never once will it down shift and rev up. I normally have less then 1500lbs in the back. But I CAN"T STAND when I'm climbing a hill or driving into the wind in a gas truck and it down shifts then back up to O/D then down into drive all the time. Nothing pisses me off more then that.

I drove my brother inlaws 12 F150 for a few days. Nice truck I guess. (Anything 9 years newer then what I'm used to is gonna be nice) But it always was down shifting. Gasser's also have that lag when you step on it. I can't stand that too.

Did I mention a hate gasser's.

Keep your dmax. . . Hell trade it in for a powerstoke or cummins I'm not picky just don't buy a gas

 

[mike_s]

No different than putting chips, different turbos, etc on a diesel really. Just for example, Toyota makes an s/c for the tundra 5.7l that bumps it from 380hp to 505hp and still covers it on warranty. Obviously they are confident it won't puke the motor. In general, all modern motors are built a lot tougher than years ago.

In many cases though, it is different. The toyota supercharger likely comes with a completely different intake manifold as it is probably a part of the chargers housing. Along with this is going to come gaskets and tuning specifically for the combination, directly from the engineers who designed the whole package. Dont get me wrong here, it can definately be done, and kept reliable too, but you will not see a 500 HP gas engine live for over 300,000 miles like you will a diesel. Especially if you tow with it.

i Like gas vehicles, as well as diesel. For an off road toy or a sports car give me a gas engine any day of the week. But for a highway or tow rig, i'll take diesel every time. Plus, there is just something really fun about the look on the dudes face whos little rice grinder just got destroyed in the quarter mile by a truck that weighs 8000 LBS.

 

[av8er]

I used to own a 99 chevy extended cab with Whipple Supercharger

It was a half ton, with a 5.3L vortech, the gears had been changed to 4:56 front and rear, it had a 6" lift with 35"s > that pickup blew up the motor, tore out the transfer case, ate a transmission and tore out the rear axle( my fault powerbraking it in the drive way after a few too many beers) I lost $25K in less than 2 years time sure it had lots of power, but it only got about 9 MPG not towing ,6 MPG when towing. I sold the supercharger for $2K on ebay it retailed for $6k will never buy another one.

 

[Jaynelson]

In many cases though, it is different. The toyota supercharger likely comes with a completely different intake manifold as it is probably a part of the chargers housing. Along with this is going to come gaskets and tuning specifically for the combination, directly from the engineers who designed the whole package. Dont get me wrong here, it can definately be done, and kept reliable too, but you will not see a 500 HP gas engine live for over 300,000 miles like you will a diesel. Especially if you tow with it.

Yes, it would come with all of that, as I would hope any quality "kit" would as well.

It really depends what you want to do with the vehicle. If you want to keep the vehicle for 300,000 miles and tow heavy loads often with it....it's obviously quite hard to beat a diesel. If you drive the vehicle unloaded often, and use it as a weekend warrior tow rig, there is really nothing wrong with a gas motor. A gas motor with an S/C is a helluva lot more responsive and fun to drive than even a hopped up diesel.

Either motor will outlive the service life of the rest of the vehicle in my experience.....unless you enjoy driving old POS's with blown out seats, shocks, front ends, etc, etc. I work in the auto biz and just don't see many people keeping their vehicles to the bitter end like that these days.

 

[mike_s]

Yes, it would come with all of that, as I would hope any quality "kit" would as well.

It really depends what you want to do with the vehicle. If you want to keep the vehicle for 300,000 miles and tow heavy loads often with it....it's obviously quite hard to beat a diesel. If you drive the vehicle unloaded often, and use it as a weekend warrior tow rig, there is really nothing wrong with a gas motor. A gas motor with an S/C is a helluva lot more responsive and fun to drive than even a hopped up diesel.

Either motor will outlive the service life of the rest of the vehicle in my experience.....unless you enjoy driving old POS's with blown out seats, shocks, front ends, etc, etc. I work in the auto biz and just don't see many people keeping their vehicles to the bitter end like that these days.

IMO though, i would generally shy away from a supercharger if mileage is a concern, as they do draw power at all times. There are kits that you can get that have clutched drive and intake bypass systems to avert that situation, but they are very expensive and add alot of complexity. Superchargers are tons of fun though, boost is there as soon as you smack the go peddle. Very responsive for sure.

There are several companys that make turbocharger kits for late model gas engines, could be a better alternative for mileage while driving unloaded or with light loads as the turbo wont generally increase output and fuel consumption untill the load on the engine increases. If i ever get enough money saved up for my sports car, it will have turbochargers on it.

I agree with you about people not keeping their vehicles till the bitter end these days, but are they really not keeping them as long, or are they lasting longer? LOL! The drivetrains are better than they have ever been for the most part, and the interiors are getting cheaper and cheaper (no matter what brand you buy IMO).

i dunno, i guess the only real pertinent advice i would give to the OP is make sure you research your needs well, and never never get a first year all new engine. Like the first year all new duramax had alot of problems, didnt really get everything all ironed out till late '04 on that one, the brand new LML duramax has tons of problems with the urea injection system...let the eager people help GM figure out where the problem areas are gonna be and fix them first, buy a second or third year production model and you generally wont have many issues with them.