Understanding the difference, I don't want to be misinformed Options

[frosty]

I'm not looking to getting flamed, I just need to understand something.

As I've been searching the forums about my previous post on future engine mods, I found that it's not good to turbocharge the beams motor.

Is this true? If so then why? To my understanding hondas v-tech motor can be turbocharge. Is not the vtech and the beams vvt-i somewhat similar in what they do? PLEASE, IF YOU KNOW THE ANSWER, CORRECT ME AND CLARIFY THIS!!!! I do not want to be misinformed on this. As a celica lover I need to know this and as you guys are celica lovers you should correct this information.

Thank you.

[mark_426]

Well, I dont know about the beams at all, howeever....

The 300zx has had a feature that held the valves open longer at high rpms to add more fuel (aka VTEC)... and they sold them TT from the factory..

I dont see why it would be a problem if the Beams just has a valve/timing setup like so.... however, if the compression and things like that are off, it could be less desirable to do..

[WannabeGT4]

You can turbo almost anything. There may not be as much of a margin of error with the beams though. High compression and a moderate amount of boost mean you'll more than likely have to run an octane higher then what you can pump at the gas station. If you're going to run low comp pistons and change the head gasket you might as well invest in a 3SGTE. The only reasons I can see for boosting a Beams would be for individuality or if your Celica came with it stock. VVT should not be an issue if it is properly tuned.

[DmVinny]

VVT would not be an issue whatsoever, like Wannabe said you can turbo almost everything, and since VVT is almost on the same principle as V-TEC and V-TEC has been turbo'd many times over.

[Digndoug]

The only thing is, stock turbo engines come with stronger parts and designed to handle boost. In a non-turboed engine, then turboing it, will just proved more stress on parts that wernt designed for it.

[macavely]

like everyone one else said you can turbo it .... but you have to be more careful with what you do on the beam engine cause of its higher compersions ... it would puitting more feathers in a pillow that is already full ... and isn't made out of something that can streach to hold more feathers in ... you can add more .. but how much more is ever limited before you cause extream damage..

[Kwanza26]

Wannabegt4 is the only one rolling in the right direction here unfortunately.

First off... VVT/i is NOT anything remotely similar to VTEC. VVTL-i may be almost the same as VTEC... but VVTi is NOT. VVT works like a computer controlled adjustable cam gear. It only affects cam timing. VTEC actually changes cam profiles (cam lift and duration), able to run a low cam for normal everyday use and then able to run a high cam for high performance in the higher rpms, where longer duration cams and higher cam lift is of greater use. There are however many different versions of VTEC...

As for turbo charging the BEAMS... it can be done. The only major mechanical issue is the high compression. I'm actually gonne go out on a limb and guess the BEAMS and the other n/a 3SGE motors have the same crank and rods as their 3SGTE counterparts. Why do I say this? Consider the 4AGE. Smallport, 20V... all of the later model 20mm pin versions all share essentially the same rod/crank set-up as their purposeful forced induced family engines (4AGZE in this case). Chances are, the n/a 3SGE's are exactly the same way. Besides that... other problems will include custom tuning for VVTi, fuel managment... etc. The reason people warn against turbocharging the BEAMS motor... because it's built inheirently as an n/a motor. Turbocharging and tuning will yeild no advantage over a 3SGTE...

Other things to consider... performance n/a engines tend to have more overlap than forced induction engines. Higher boost and a lot of valve overlap can cause issues...

[frosty]

I knew you would post Kwanza26 . I'm glad you guys did. I figured that if it could be turbocharched that it would have to be under a very watchful eye and not something just slapped on. In the past few months I have learned more about proper tuning and understand the nessecity of it.

HAS anyone turbocharged the beams yet? I'm curious to see how it turned out.

[BlackSTX]

Wasn't there a post-production Altezza with a turboed BEAMS?