SC + twinturbo

[X11_STE]

OK, Timg, thanks for the post. It had been awhile since I read it and I'm glad there was someone else to catch my error.

[EspanolaGuitarista]

I got an idea that can be a good...

...compromise between the two. A Viscous-coupled belt- drive Turbo. BAsically a belt drive spinning a viscous coupler(torque converter of sorts). Multiplying the gear ratio and attaining turbo rpms. Viola!

[RacerX11]

A viscous coupler will not multiply rpm.

[Guest]

Repeat this statement, in fact write it on your garage wall:

"More is not always better."

Yes compund charging can be done, but is absolutly not nessissary and only gives bragging rights in the end. Once I get my Jimmy back together I'd put it up against any other daily driven vehicle of similar concept, especially if it's compound induction, I bet I'd win in a race, BTW, Single power adder, at least most of the time, I will have a nitrous kit connected but only for track days and only when the 350+ HP produced with the help of the turbo(s), just isn't enough for me.

Even in RWD, at times the turbo lag can be a god send, I know with my Jimmy, before I added the track bars I'd blow the wheels off with little to no boost off the line, and now that I can get traction, I will add more power, but it's still going to be a challenge to get that torque down.

I will always believe that one type of forced induction is all that is needed.

[RebelGT]

Sport Compact Car did that with the MR2. I probably have the article at home.

thats funny cause i read an editorial in the same magazine, where they talked about the group b rally cars and how pointless it is for the average person to do this.

[ignoreance]

Hear is some good reading about why you would do a dual boost style application. Though I doubt you have the tuning capabilties to make it as effiective because of the lack of direct injection to top that off they have done some flapper details in the exaust and intake changing that around. A short reason is emissions. But i say if your board have lots of money and engine tuning shop and lots of dino time.....
GET ER DONE!!!!

http://www.vwvortex.com/artman/publish/volkswagen_news/article_1496.shtml?page=2

[tha_SwEdE]

Insperation or braging or what u call it:

http://www.hilmersson-racing.com/start.asp?show=j

But now its off topic again...

If I put my question like this then:

What turbos would u use if u wanted to twinturbo charge a 3.1 L 60 degree V6?? (no SC just twinturbo) If u can it would be great if u could say at what rpm the turbos start charging...

Regards
Tha Swede

[Guest]

Insperation or braging or what u call it:

http://www.hilmersson-racing.com/start.asp?show=j

But now its off topic again...

If I put my question like this then:

What turbos would u use if u wanted to twinturbo charge a 3.1 L 60 degree V6?? (no SC just twinturbo) If u can it would be great if u could say at what rpm the turbos start charging...

Regards
Tha Swede

It'll depend on the actual use of the vehicle, how much the vehicle weighs, what transmission is being used, what gear ratios are within, along with the final drive, etc.

Just to put it simply, a heavier vehicle, or one with "longer" gears, can spool a larger turbo quicker than the same turbo installed in a lighter vehicle and/or one with shorter gears. The actual load placed on the engine has a LOT to do with this.

[tha_SwEdE]

huh?? what are u talking about??
the gera ratio and weight of the car will only diterm how fast the car will go and accelerate... not when the turbo starts chargin.. thats the engine that do that part...

[Superdave]

Twin charged cars = Dyno Queens

[Guest]

huh?? what are u talking about??
the gera ratio and weight of the car will only diterm how fast the car will go and accelerate... not when the turbo starts chargin.. thats the engine that do that part...

No, actually the weight of the car AND the gears DO indeed have an effect on the spool characterists of the turbo(s).

I have tested and VERIFIED this mysefl with my Jimmy (and other vehicles), towing I spool alomost a 1000 RPM lower, in first gear, and about 800 RPM lower in 2nd, I forget about the rest. This is towing a car on a car trailer I mean, so yes weight has an effect.

Start reading up on turbocharging, anyone who knows anything about turbos and builds turbo vehicles KNOWs this is a consideration when selecting a turbocharger.

[RacerX11]

Yep...Raven is right. In the lower gears, the engine accelerates too fast, so it takes longer to build boost. Some turbo cars can't even hit peak boost in 1st gear.