Pontiac - Boost Turbo, supercharged, Nitrous, EFI & other Power Adders discussed here.

          
Reply
 
Thread Tools Display Modes
  #101  
Old 01-06-2020, 03:14 PM
Half-Inch Stud's Avatar
Half-Inch Stud Half-Inch Stud is offline
Ultimate Warrior
 
Join Date: Jul 2000
Location: BlueBell, PA or AL U.S.A.
Posts: 18,458
Default

ROOTS blowers are bad like Domed Pistons, 2-speed trans, and spools; the worst on paper., yet the best in the right hands.

Procharger; 0.7 Sec ET imporved for running an intercooler is stunning at 8.2 to 7.50 level applied horsepressure.

Im Half-Wit enought to try the compressed air with a blow-thru carb.

  #102  
Old 01-06-2020, 03:22 PM
GTOGEORGE's Avatar
GTOGEORGE GTOGEORGE is offline
Suspended
 
Join Date: Mar 2003
Location: South Rockwood, MICHIGAN
Posts: 8,884
Default

Quote:
Originally Posted by Half-Inch Stud View Post
ROOTS blowers are bad like Domed Pistons, 2-speed trans, and spools; the worst on paper., yet the best in the right hands.

Procharger; 0.7 Sec ET imporved for running an intercooler is stunning at 8.2 to 7.50 level applied horsepressure.

Im Half-Wit enought to try the compressed air with a blow-thru carb.
Yea, my money says he made more improvements then a inter cooler to pick up all that ET.......kinda common sense!

People make comments without giving ALL the info.


GTO George

  #103  
Old 01-06-2020, 05:12 PM
Tom Vaught's Avatar
Tom Vaught Tom Vaught is offline
Boost Engineer
 
Join Date: Dec 2001
Location: The United States of America
Posts: 31,294
Default

Quote:
Originally Posted by Half-Inch Stud View Post
ROOTS blowers are bad like Domed Pistons, 2-speed trans, and spools; the worst on paper., yet the best in the right hands.

Procharger; 0.7 Sec ET imporved for running an intercooler is stunning at 8.2 to 7.50 level applied horsepressure.

Im Half-Wit enought to try the compressed air with a blow-thru carb.
Brian H would have to give you the Dyno Measured Compressor Discharge Temps when he ran the thing at Steve Morris Dyno. I do know it was over 300 degrees discharge temp going into the Carb Bonnet.

Now he has an intercooler with Water and Ice, a LARGE ONE.
Typical temps at the starting line with that type of set-up is 40-45 degrees.
You do the math HIS. There were other changes for airflow (Tony Bischoff changes) but the charge temps into the engine were a major problem for Brian for several years. F-2 Superchargers make a LOT of heat.
Course you should already know that.

Tom V.

__________________
"Engineers do stuff for reasons" Tom Vaught

Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward.
The Following User Says Thank You to Tom Vaught For This Useful Post:
  #104  
Old 01-07-2020, 09:44 AM
Half-Inch Stud's Avatar
Half-Inch Stud Half-Inch Stud is offline
Ultimate Warrior
 
Join Date: Jul 2000
Location: BlueBell, PA or AL U.S.A.
Posts: 18,458
Default

Tom, yea i have done the calcs for the superchager thermal rise; WE all get mighty concerned with thermal rise of beaten & compressed air!

There is a Fackebook joke of a Van with a roof-mounted Turbo; well the discharge pipe is sooo long that it may be a good intercooler ( several RT-turn elbows will harm momentum&velocity, but compare what an intercooler does to momentum & velocity.

IF our people would avoid momentum loss upon Compressor exit-to-Intake opening...goodness!

  #105  
Old 01-07-2020, 03:51 PM
Tom Vaught's Avatar
Tom Vaught Tom Vaught is offline
Boost Engineer
 
Join Date: Dec 2001
Location: The United States of America
Posts: 31,294
Default

As you know HIS, there is a thing called Charge Density and Charge Density when affected by Thermal increases IS affected. More lbs per min or Kg/sec and the HP goes upward. Simple Physics.

I could care less what some guy who put a turbo on the roof of his vehicle did

I do have a 351 Ford Van story for you though. He had a Ford Pantera style (engine between the seats vs just behind the seats Van). Engine was designed for boost and he put a large diesel Turbo on the engine. One day he came in with a piece of the driveshaft with 7 "spiral wound" turns on the tube.
Rev Limiter saved the engine when the yoke/driveshaft exited the vehicle on the dyno.
RW dyno, it made 570 hp and over 600 lbs/ft of torque, so easily over 600 hp at less than 14 psi of boost. That ended the dyno session.

Tom V.

__________________
"Engineers do stuff for reasons" Tom Vaught

Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward.

Last edited by Tom Vaught; 01-07-2020 at 04:02 PM.
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 10:05 AM.

 

About Us

The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.

 




Copyright © 2017