I know turbos can make outrageous hp, especially at high Rpms.

However I always considered the immense amount of torque these roots s/c make to be one of the key factors in making these 4700# brick walls we drive so fast.

With a turbo, aren't you losing that low end torque that gets these trucks off the line?

I understand why Sal went with Turbo, He wanted Peak HP last 1/2 of the track where areodynamics are the most important factor. And with 800hp he more than overcame the aredynamics issue.

So how much Torque do you lose at the low RPM's when switching over to a turbo.
I've been kicking around the idea of adding a turbo to one of my cars. Doubtful, considering I'll need a complete engine management system and Fuel injectors, as a blow through system is much harder to get tuned.

 

I didn't want peak hp at a certain rpm, I wanted MORE hp than any of the available blowers could provide without using nitrous. I was NOT willing to give up torque. And you don't have to give up torque, if you set your turbo setup properly.

Since my truck was really the first turbo guinea pig, I had nothing to go on other than the suggestions from the people I was working with on the project. Luckily, it all worked out in the end. My truck not only made over 800 rwhp, but also 800 rw torque, with no spray.

 

I think it's just a learning curve, how to launch the truck. Turbo's will alway's be KING! The SC's are just easier to use and more predictable.
My buddy race's his eclipse with a nasty turbo and is alway's talking about switching from low boost to high boost. He busted his tran's trying to get that little go-kart down the track!! He put a carbon fiber clutch in it and I'm sure it would have been a 12 second car but the weak link took it out.

I'm sure we're gonna see some awesome time's from the hair dryer's!!
Bryan

 

Whoa... I had no idea it made 800 trq!

I know you said on the street it was like a raped ape
Simply speculating, do you still think you would have cut as quick a 60' time as prior? Or a little further down the track? Would you have to spool it up at the line with a higher convertor?

 

It was really all speculation about the launch since I had not tried it yet. I had the spray on board, in case I wanted a harder launch, and then could shut it off. That was the plan with the F1R. But with the F1R, you were tied to a specific power band. With the turbo, you can spool it up on the line and leave on whatever boost you want. Scott will have to let us know how that all works out now .

 

Hurry up already Scott! your tires are probably still hot and sticky from the burnout you did!



(Sal, any update on your '05 cobra)

 

spill the beans please.

 

Red makes Mad azz torque! You have to think a lil different as to how and when you use your power but I know for a fact that I can blow the tires off on the street at 90mph with out a problem! ( and he!! freakin yes that is scary)
I love my turbo and will never go back to a blower again.

Scott

 

I can't even imagine that on a truck that is full weight!

 

What would you like to know?

 

OH BTW I just got the lug nuts for the bogarts. I WILL make it to the track this week. But Im going to keep it secret till L Fest.

 

Have you done anything else to it? Are you selling them? Anything new?
updated pictures...

 

In a nutshell the more power you want the bigger the turbo. The bigger the turbo the more exhaust load you need to get it spooled up which causes initial lag. Superchargers on the other hand don't rely on load but rpm so that's why you have very low end torque.

As Sal said you can rev the motor(create exhaust load) and spool the turbo up to create the power wanted off the line. Or you can use nitrous which creates the lost power down low and also creates more exhaust load to help spool the turbo up faster. With nitrous you can just stomp the pedal like normal and not have to worry about reving the motor.

For street use it's all dependent on what works best for you. S/C's still give you better drivabilty for low speed bumper to bumper traffic. On the other hand turbo technology has gotten much better and with the hybrids you can get a nice street turbo with minimal lag and still enough flow to give you some nice top end numbers.

For now positive displacement blowers are still the most reliable as they only spin from about 10,000rpm to 16,000 rpm and last a long time. A turbo can spin 80,000rpm + so of course there is more wear and tear that needs more frequent maintenance. I don't think anyone will disagree that a turbo is nice but there is a lot involved in installing one. Scott got lucky as Sal did most of the R&D and labor work.

 

I've had all power combinations except for nitrous on a N.A. motor.

IMO a turbo if setup properly can be dialed in to have very little lag down low but yet not die off up top. The header design, collector, and down pipe is the key.


Rich

 

They really dont need much maintenance i had a 92 volvo that was turbo which my bro has now and it has 116,000 miles on the turbo with no problems and since 75,000 i raised the boost to 15psi from 7psi stock. Turbo is the way to go.