Then you're misinterpreting. Like you said, they were responses. They're responses to people saying the blower is used for low end torque and throttle response, and the turbos top end power. I'm just saying that the same result could be achieved without the dual power adders. I'm not saying it isn't creative or different, and I'm not saying that I don't like it. People are theorizing about why when its very likely not the reason he did what he did.

Don't make it what it isn't. Ill be the first to admit that 4 turbos is 100% completely unnecessary for what I'm doing. Does that mean I don't appreciate my own setup?

 

Then there are 2 different conversations happening on the same thread.

IMO, anyone who wants to try compound boost should do it. The regurgitated one size fits all setup, is old.

 

Yup it is old....like 100 years old....and just happens to still work better than compounding at going faster. That's said, everyone has a choice to do what they want with their money.....unless you live in CA

 

It can work, just depends what you are looking for.

If I remember correctly, the supercharged 2.0L LSJ, compounded with the LK9 turbo was relatively popular for creating power-dense little motors.

Sticking a turbo in front of a positive displacement blower is a great idea, especially for elevation compensation. Roots/TVS blowers move volume, and adding a turbo to provide a measured mass makes sense.

 

for drag racing compound doesn’t make any sense. The SC will just be adding weight and restriction as you have time to get the turbo spinning whilst sat on the line. And with an auto you are WOT the whole time so never slowing the turbo down (much).

Hill climbing, road racing, rallying, etc. is the exact opposite. Lots of throttle modulation and the need for instant power. Any ‘lag’ is time lost. Yes you can around it with anti lag, rocket boxes, N2O, etc. but it’s still masking the issue. As soon as you close the throttle the turbo is slowing down. As you go WOT it takes time for the turbo shaft speed to come up. This is why people love PD blowers for HPDE cars and street cars, they feel fast (torque all the time).

(Not trying to teach anyone to suck eggs)

 

Theres no reason a turbo only setup won't perform for all other types of racing. The turbo has to be sized properly for it. All the OEM racing stuff have full boost by 2k rpms, some even earlier. Size it right for the application.

 

All the OEM racing stuff ?

What exactly is that ? And why would a racing car be concerned about sub 2k rpm ?

 

Serious? There are multiple racing classes out there that require OEM engines and only allow suspension and brake upgrades. I don't know of a single OEMs that use a turbocharged motor on a mass production street car that designs the turbos for max power at max rpm. They design it for part throttle and low-end/midrange. They under sized the turbos intentionally.

 

So they don't design them for drag racing ? They don't design them for maximum power ? They don't design them for one single thing ? Going as fast as possible ?

A bit like the guy asking about using two forms of boost to achieve what he wants...

Weird eh.

 

The whole TCR class is OEM turbo cars, Honda, Hyundai, VW/Audi, Kia, Subaru etc all compete. Most have less power than their road going counterparts. Then you have factory backed turbo GT cars with from Mazda, Nissan, Acura, BMW, etc so the OEM racing list is quite expansive.

 

AKA VR30DDTT... smh

 

what was your point? To ask a question about OEM class racing and then acknowledge exactly what I said? Did I not already say above that it's his money and he can do what he wants? Yup.

 

I'll hold it down until you return. Now I'm just bitter because you were making the path to HPT easier for me.

 

Dude, you dont know how much I miss that fricken car. If it wasnt for me about to buy this house, I'd have another one right now. But I will resist temptation and wait until spring/summer. Messed up thing was, I had JUST licensed the car the day before. I was going to start tuning it on the day it got wrecked. Got wrecked at 1:30am the same day........

 

😳That hurts big time. Congrats on the house tho!

 

So Im also building a rear mount setup for my LS swapped Tacoma. Does anyone have links to some good rear mount setups? Just wondering about turbo sizing, proper scavenging pump, and any other things needed to get it setup, Im going to do this before I turbo the Camaro for now...
Thanks!

 

I've got a rear mount build thread on here. If you do a search you'll find it. There is also the "Zombie rear mount saga" thread that is also good info if you search for that as well.

 

turbowerx exa pump.

Don't cheap out.

 

Well you can cheap out, especially if you want to just get it running and swap some parts out later. I tried the ebay oil gear pump for $60 basically to mock up my rear mount but it worked fine, just noisy. I then swapped to the Turbowerx Spartan pump which was much quieter and worked fine as well. Turbowerx Exa is generally good and have used them personally in the past, but I've also seen two recent failures that left the vehicles undrivable. I ended up scrapping the rear mount and going back to front mount twins anyway.

 

Turbowerx Spartan here going strong still.