It's Turbo Upgrade Time!
09-11-2003, 02:11 PM
#21
Senior Member
Join Date: Dec 2001
Location: Jensen Beach, FL / Sylva, NC
Posts: 2,934
I did the Series 5 T-o4E hybrid thing from Majestic. My other mods were two 720 cc secondaries, upgraded Fuel Pump, S-AFC, Profec B, 9.5# flywheel, K&N intake with a Mariah cold air box. Racing Beat Downpipe, presilancer and Apexi N-1 Cat-back.
I do not 1/4 mile - my car is set up for Autocross - BUT I did take it out for a test and tune to see what it would run. I turned a 13.08 running 10 PSI and dont know what I am doing. If your mods are similar and your a drag racer you'll see high 12's with that setup.
I do not 1/4 mile - my car is set up for Autocross - BUT I did take it out for a test and tune to see what it would run. I turned a 13.08 running 10 PSI and dont know what I am doing. If your mods are similar and your a drag racer you'll see high 12's with that setup.
09-11-2003, 02:15 PM
#22
Senior Member
Join Date: Dec 2001
Location: Jensen Beach, FL / Sylva, NC
Posts: 2,934
Just look at your sig. GET A BOOST CONTROLER!! It will make your car ramp up boost faster and higher. The turbo upgrade is awesome but will not shine until you do a boost controler. I prefer Profec B but there are others. Sell a kidney whatever you have to do just get a boost controler.
09-11-2003, 04:01 PM
#23
Super Moderator
Thread Starter
Join Date: Apr 2002
Location: VA
Posts: 2,532
Help me to understand this. I thought a boost controller would only let you increase maximum boost. The ones I've looked at just delay the opening of the stock wastegate to a higher pressure.
How does the boost controller affect how quickly the boost comes up?
How does the boost controller affect how quickly the boost comes up?
09-12-2003, 07:04 AM
#24
Super Moderator
Thread Starter
Join Date: Apr 2002
Location: VA
Posts: 2,532
Originally Posted by 1988RedT2' date='Sep 11 2003, 09:01 PM
Help me to understand this. I thought a boost controller would only let you increase maximum boost. The ones I've looked at just delay the opening of the stock wastegate to a higher pressure.
How does the boost controller affect how quickly the boost comes up?
How does the boost controller affect how quickly the boost comes up?
09-12-2003, 10:12 AM
#25
Senior Member
Join Date: Dec 2001
Location: Jensen Beach, FL / Sylva, NC
Posts: 2,934
I am not going to get into a whole debate on the actual workings of the boost controler. I will tell you my observations from my own experiance.
With out a boost controler I would see peak boost at 6K RPM on up WITH the boost controler I would see peak boost at 3,500 RPM and it would stay there until redline.
When you have a boost controler your car will pull harder down low.
You will not regret it. Best money I ever spent and if I could do it over again it would have been my FIRST mod. Period.
With out a boost controler I would see peak boost at 6K RPM on up WITH the boost controler I would see peak boost at 3,500 RPM and it would stay there until redline.
When you have a boost controler your car will pull harder down low.
You will not regret it. Best money I ever spent and if I could do it over again it would have been my FIRST mod. Period.
09-12-2003, 10:33 AM
#26
Senior Member
Join Date: Nov 2002
Posts: 3,108
Originally Posted by Jims5543' date='Sep 12 2003, 10:12 AM
I am not going to get into a whole debate on the actual workings of the boost controler. I will tell you my observations from my own experiance.
With out a boost controler I would see peak boost at 6K RPM on up WITH the boost controler I would see peak boost at 3,500 RPM and it would stay there until redline.
When you have a boost controler your car will pull harder down low.
You will not regret it. Best money I ever spent and if I could do it over again it would have been my FIRST mod. Period.
With out a boost controler I would see peak boost at 6K RPM on up WITH the boost controler I would see peak boost at 3,500 RPM and it would stay there until redline.
When you have a boost controler your car will pull harder down low.
You will not regret it. Best money I ever spent and if I could do it over again it would have been my FIRST mod. Period.
APEXI AVCR! best money spent on car. Other then buying car itself.
09-12-2003, 01:31 PM
#27
Super Moderator
Thread Starter
Join Date: Apr 2002
Location: VA
Posts: 2,532
Originally Posted by Jims5543' date='Sep 12 2003, 03:12 PM
I am not going to get into a whole debate on the actual workings of the boost controler
For those of you with self-installed boost controllers, what does a boost controller consist of?
09-12-2003, 02:42 PM
#28
Senior Member
Join Date: Dec 2001
Location: Jensen Beach, FL / Sylva, NC
Posts: 2,934
I didn't mean it as I do not want to argue with you 1988RedT2.
Everytime this subject comes up an argument brakes out over how they work.
I really dont care how they work other than how it feels when I drive my car. Is it faster with a boost controler? Yes much faster. Thats all that really matters. It makes your boost more constant over a wider RPM range.
Everytime this subject comes up an argument brakes out over how they work.
I really dont care how they work other than how it feels when I drive my car. Is it faster with a boost controler? Yes much faster. Thats all that really matters. It makes your boost more constant over a wider RPM range.
09-13-2003, 07:06 AM
#29
Super Moderator
Thread Starter
Join Date: Apr 2002
Location: VA
Posts: 2,532
Well, you can call me crazy if you like 
but I'd have a hard time coughing up the hundreds of bucks for a boost controller without having a clue as to how it would help me. And the butt dyno is not a very objective test method. Can anyone shed some light on what means a boost controller uses to control boost besides the wastegate?
I've read several product reviews and some of these controllers perform no better than a ball valve.
http://www.sportcompactcarweb.com/tech/020...boostcontrol08/
I've read several product reviews and some of these controllers perform no better than a ball valve.
http://www.sportcompactcarweb.com/tech/020...boostcontrol08/
09-13-2003, 07:30 AM
#30
Senior Member
Join Date: May 2003
Location: Dover DE
Posts: 989
Let me see if I can shed a little light on this for you. We all agree that boost controllers work by changing the boost pressure to the turbo acctuator. Now think of it this way, your acctuator is controlled by a spring, and as any other type of metal it weakens over time. on and off boost puts a strain on the sping over time, and it just cannot hold the boost desired or hold the acctuator closed against the boost pressure being fed to it. In some cases a boost controller takes away the boost pressure from the spring, allowing it to work as it should and then meters the boost pressure according to how it is set. If Jims boost controller dropped his spool up that much, I would have to say he has a worn acctuator spring or the boost line was too big for the acctuator (or wastegate of which I am not sure of his setup).
So yes, there is a possibility that a boost controller can lower boost peak levels, but it is becasue the unit is not feeding the same boost pressure against the spring anymore.
Hope this makes sense to you.
So yes, there is a possibility that a boost controller can lower boost peak levels, but it is becasue the unit is not feeding the same boost pressure against the spring anymore.
Hope this makes sense to you.