Turbo Alky ?'s

I am getting questions on a mechanical turbo alky setup.
500cid, 3 turbs, high boost
I want to set it up to be boost sensing vs my stages coming on by fuel psi.
Besides Hilborn's Sensor valve, do you know of any boost sensing valves to do this?

 

How much boost is High. I run a twin turbo 50 PSI.

 

Hear me out, I'm not crazy!

A typical engine like what I'm talking about is inline 6 that started life as a diesel. Because of rules the heads aren't that good plus they have 2 less intake valves than most drag motors, there also limited to 504cid. All this being said typical boost number is around 90 psi.
Most have a set of nozzles that are extremely similiar to hat nozzles/BV/idle check, then 2 to 3 more stages. A stage being another set of nozzles activated by either boost psi or fuel psi.

I want these to be boost activated and want to know if anyone else is using a valve like this?

 

Try calling Hypermax.... They do a lot of that stuff for tractor pullers.

 

I Bought One Of Those Valves A While Back, Think It Was From Hilborn Though... Had An Adjustable Orifice For Boost I Believe. Do You Need One?

 

I think you could make it boost sensitive by using pop off valves just like for fule and set them to open at different air pressures. once they open have the pressure activate an air over electronic valve and use the electricty to open an additional fuel port. Much the same way we lean out or richen up our blown alky dragster. Sort of like a mega hobbs switch.

 

Thanks but we are running alky, Hypermax is diesel only.




Thanks for the idea Rodney.
Yours got me thinking. We planning on using a MSD 10+. Would MSD have the stuff to be able to measure boost psi then turn a enrichment valve on?

 

SoDak, what hardware do you already have and what exactly are you trying to accomplish with the fuel system as a whole? Is this twins compounded into a single? Why I ask is because there are a number of mech, mech-electric, and electric approaches which could be generally applied, but the path to follow is sort of dictated by where you're at already and where you want to go. Will there be intercooling? What sort of data system onboard? Drop me a PM with your address and we can discuss.

 

what is the reason for not using the hilborn sensors and p-valves? trying to come up with a better system?

 

ron's fuel injection does one i think..
also,
there are guys out there making the "hilbourn enrichment " style valve, but it's also different ... if you get the drift...

also email travis quillian, he's alway making , designing something different to work in a persific application....
turbopromod@yahoo.com

cheers
ash

 

A simple way to do what you want is to set up your pop off valves to the various boot levels (air pressure) you want the fuel to turn on at. Plumb them into your manifold / plenum and so they see boost. then route the air out of the pop off valves to simple hobb switches that are NC wire the Hobbs to NOS alky solenoids. Plumb the solenoids into your fuel system and Ta Da. The problem would be that you would need to bleed the air out between the pop off valve and the hobbs switch after the pass to shut the hobbs switch off. This can be done with a little plumbing to a NOS purge switch, after the run just bump the purge switch manually or with a timer and vent the unwanted pressure and you are ready to go again.

 

I grew up watching turbo alky motors not run, not run right and then there were ones that built enough cylinder psi to literaly blow chunks onto the track. My impression was that most those guys were trying to make it work with fuel systems that were too much like a roots fuel system. In that they were basically RPM/fuel psi controlled, since the boost (in a roots) is consistent with the motor/fuel pump RPM, it works fine.
I still occasionally see motors scatter because of the fact that the motor RPM can be pulled down, thus it leans itself, but the boost stays up.
It seems to me I want my fuel system sensing boost.
The Hilborn one might be fine, my impression was it wouldn't work over this range of boost.
Rules say no intercoolers or EFI.
We have very few fuel and turbo parts at this point.
Yes, twins compunded into one.
Keep the ideas and questions coming.

 

I agree you are lookin at it correctly. I have a blown hemi today but my turbo experience (20 years) says yep u are on the right track. I used the hillborn boost sensing valve along with my own ideas to make my stuff run. I still have the twin turbo V-6 and a single turbo in line 168 cu in 4 cyl that makes 1200 HP. Mike Strasburg has a manifold with NOS type solenoids that he make's to shift the B&J trany. It has the purge solenoinds and everything. Its abot 500 bucks but its billit alum and would work for part of what you are after. You should also check out electromotion.com Dave has a varitey of air over electric switches that may get the job done.

 

1200HP from 168CID

1200HP out of 168cid is awesome!!!


Rodney, thanks for the info.

An adjustable air pressure sender could be used to activate the other stages. That would eliminate the purge thing.

 

i have a 2200 hp set up i was running on a drag race boat this system is mechanical and works all those other mechanical systems fall way short we ran this system in a ihba capsule pro mod boat for 4 yrs

 

Turbo setup

Hi,
Sounds like you should go and listen to the tractor pulling guys. They get roughly 4000 HP out of a 500 ci 6 cylinder in line that started life in a farm tractor. I don't know exactly how they do it, but they also use a 2-stage 3-turbo setup with at least 90 PSI pressure.
HTH,
Marcel

 

Rodney,

I had thought about chiming in on this as I am adept at searching the web for switches relays and such to make systems to control different components on race cars, I also thought the nitrous solenoids like the 16060 nos nitro/akly would work well.

However I did not post as I have no experience with staged turbo's and thought that on a multiple staged turbo setup the change in flow through the intake tract particularly after the shift (due to the changing backpressure) might need to be accounted for? I helped a guy a long time ago map a single turbo rotory (800hp 2 rotor) but we were looking at fairly low exhaust backpressure so we were able to just follow the boost and rpm and get real close. In your experience does the change in backpressure play a big enough role to be a problem?

Just curious,

Richard Gavle

 

today's tractor

I agree that years ago the turbo alky tractors had more than their fair share of problems. Today if you were to go to any major tractor pulling event you would see almost all of the tractors in the Super Stock are turbo alky. Bryan Conner builds great fuel systems for these machines 5128940044

 

Are you allowed to go with a EFI set up ??? Either way give Travis a call and tell him the turbo Olds guy sent you. Travis is one sharp guy. He is a personal friend of mine and has been a invaluable asset on my car.