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View Full Version : Figured out why my car isn't really getting any faster....

Andrew
05-13-2007, 12:24 AM
Took the ride out to Northstar tonight and JamesB, theHead and I finally figured out what the deal is... the increase solenoid on my boost controller isn't working so while I thought I was turning up the amount of CO2 on top of my wastegate, there was no CO2 going on the wastegate at all.... all numbers so far have been run on the wastegate spring (~10 psi or so - you get more in higher gears depending on weather, etc.) only....
Magnimike1
05-13-2007, 12:31 AM
Hmm, well good luck getting it ironed out. Like to see some 4's out of your car. I am sure you would too.
mikeb
05-13-2007, 12:40 AM
Hmm, well good luck getting it ironed out. Like to see some 4's out of your car. I am sure you would too.

It's just a matter of time :cool:
Nate
05-13-2007, 01:13 AM
Get if fixed for Sunday trick!
musclestang89
05-13-2007, 03:16 AM
here comes 4's at the cruise :D
slow55
05-13-2007, 03:21 AM
Took the ride out to Northstar tonight and JamesB, theHead and I finally figured out what the deal is... the increase solenoid on my boost controller isn't working so while I thought I was turning up the amount of CO2 on top of my wastegate, there was no CO2 going on the wastegate at all.... all numbers so far have been run on the wastegate spring (~10 psi or so - you get more in higher gears depending on weather, etc.) only....
WTF did you just say?
SNEAKY
05-13-2007, 04:01 AM
WTF did you just say?
KINDA LIKE YOUR BIG SHOT SOLENIOD NOT WORKING.

you only get the first stage.
302_plus_a_few
05-13-2007, 06:16 AM
Your next time out should be real freakin interesting.
Dawkins
05-13-2007, 06:42 AM
I have no idea what you just said but I think a fast car just got scary fast. Congrats man.
SSMAN
05-13-2007, 08:17 AM
Good to hear it Andrew, I bet it was like a breath of fresh air to you finding that out. It a new one on there and let us see what it is going to do at the cruise.
Big Thumper
05-13-2007, 09:18 AM
Have you bought an AMS1000 yet?
Andrew
05-13-2007, 09:24 AM
Good to hear it Andrew, I bet it was like a breath of fresh air to you finding that out. It a new one on there and let us see what it is going to do at the cruise.

I was actually kinda pissed off when we figured it out! lol
Andrew
05-13-2007, 09:25 AM
WTF did you just say?

I can't turn the boost up.
Andrew
05-13-2007, 09:26 AM
Have you bought an AMS1000 yet?

The MSBC1 gets one more chance......

I have actually been thinking about designing my own...
Blue99Ws7
05-13-2007, 01:14 PM
The MSBC1 gets one more chance......

I have actually been thinking about designing my own...

fuck if you can design or own why not
564826
05-13-2007, 04:22 PM
I don't know much, but it seems like your stang is going 2 fly like a bat out of hell! :D
302_plus_a_few
05-13-2007, 05:04 PM
I have actually been thinking about designing my own...Need someone to program a PIC to drive it????
Andrew
05-14-2007, 01:14 PM
Need someone to program a PIC to drive it????

I might... the issue is that everything runs off of a 16V system with an alternator, so it's more like 18+V downtrack....
Got Twins
05-14-2007, 02:22 PM
Why are you running an alternator. ITS A RACE CAR!!!
302_plus_a_few
05-14-2007, 02:23 PM
I might... the issue is that everything runs off of a 16V system with an alternator, so it's more like 18+V downtrack....That's what voltage regulators are for!
46Tbird
05-14-2007, 02:25 PM
That's what voltage regulators are for!You would think an electronic engineer would know that. :confused: :p
wade_racing
05-14-2007, 02:32 PM
ok so are you running FAST or Big Stuff? did you not see that the increase in CO2 was not making the boost go up on the graph. not accusing or anything just asking for future endevors. i know on most of those systems they will max out at 30 PSI since finding a 4 bar map sensor is hard. hence having an on board computer to moitor the systems and not effect them. glad you got your systems figured out i am sure that she will fly next time out.
302_plus_a_few
05-14-2007, 02:36 PM
You would think an electronic engineer would know that. :confused: :pEspecially one with a Masters degree!
Andrew
05-14-2007, 02:37 PM
ok so are you running FAST or Big Stuff? did you not see that the increase in CO2 was not making the boost go up on the graph. not accusing or anything just asking for future endevors. i know on most of those systems they will max out at 30 PSI since finding a 4 bar map sensor is hard. hence having an on board computer to moitor the systems and not effect them. glad you got your systems figured out i am sure that she will fly next time out.

That is correct. I never really saw the boost go above 16 psi or so even with an increase in CO2 pressure. We then checked the system out and determined that the increase (to raise wastegate pressure) was never firing and thus it wasn't working correctly.
Andrew
05-14-2007, 02:37 PM
Especially one with a Masters degree!

So how exactly are you going to get your 3.3V PIC controller to output an 18V signal? OR accept an 18V signal without blowing the gate oxides on the PIC inputs?
Andrew
05-14-2007, 02:49 PM
You would think an electronic engineer would know that. :confused: :p

That alone won't quite do it! ;)
wade_racing
05-14-2007, 02:56 PM
cool like i said glad you got it figured out i am sure once you are actually pushing 30 lbs she will fly...:)
wade_racing
05-14-2007, 02:58 PM
http://s124.photobucket.com/albums/p22/N2O-ARMD/?action=view&current=6-1.flv

a bid little turbo small block...
302_plus_a_few
05-14-2007, 03:04 PM
So how exactly are you going to get your 3.3V PIC controller to output an 18V signal? OR accept an 18V signal without blowing the gate oxides on the PIC inputs?Transistor (power darlington) and control it with pulse width modulation. And the PIC is 5v. ;)
Andrew
05-14-2007, 03:14 PM
Transistor (power darlington) and control it with pulse width modulation. And the PIC is 5v. ;)

OK, so the PIC has 6V gate oxides. Still not enough.....

I also need to drive it DC...

Basically I need a simple state machine that can take three inputs: Arming switch, brake switch, and transbrake. I might be able to procure some levelshifters but I don't like using them because they're slow.
Andrew
05-14-2007, 03:16 PM
cool like i said glad you got it figured out i am sure once you are actually pushing 30 lbs she will fly...:)

Man I hope it will do something worthwhile... then again, 5.0 @ 146 on just the wastegate spring isn't too bad...
wade_racing
05-14-2007, 03:24 PM
Man I hope it will do something worthwhile... then again, 5.0 @ 146 on just the wastegate spring isn't too bad...


no its not man i mean hell we went 4.90 at 151 still trying to figure out the truck on 30lbs and that was at an A/F ratio of about 10.3 WAYYYY FAT....

good luck to you cant wait to see what it runs next time out.
Andrew
05-14-2007, 03:36 PM
Why are you running an alternator. ITS A RACE CAR!!!

A little extra insurance against leaning out... I have a Weldon 2035 on the car that will be marginal without an alternator on high boost...
Andrew
05-14-2007, 03:37 PM
no its not man i mean hell we went 4.90 at 151 still trying to figure out the truck on 30lbs and that was at an A/F ratio of about 10.3 WAYYYY FAT....

good luck to you cant wait to see what it runs next time out.

Thanks! What's your best time with the truck? got any pics?
302_plus_a_few
05-14-2007, 04:14 PM
OK, so the PIC has 6V gate oxides. Still not enough.....

I also need to drive it DC...

Basically I need a simple state machine that can take three inputs: Arming switch, brake switch, and transbrake. I might be able to procure some levelshifters but I don't like using them because they're slow.My can't your drive it with a power darlington. You can get 8amps out of one of those.
Jetfast50
05-14-2007, 05:18 PM
Man I hope it will do something worthwhile... then again, 5.0 @ 146 on just the wastegate spring isn't too bad...

What spring? we leave with 45#'s on the 2.5 ltr 4 cyl we race in pro-mod import , 4.70 in the 1/8. Got the nitrous set up to run the shifter, pressurize the gate, and get the turbine spooled up.


A little extra insurance against leaning out... I have a Weldon 2035 on the car that will be marginal without an alternator on high boost...

Do you have a 12 or 16 volt system?
Thehead
05-14-2007, 09:39 PM
Do you have a 12 or 16 volt system?
it's a 16v system!
Andrew
05-15-2007, 09:30 AM
What spring? we leave with 45#'s on the 2.5 ltr 4 cyl we race in pro-mod import , 4.70 in the 1/8. Got the nitrous set up to run the shifter, pressurize the gate, and get the turbine spooled up.




Do you have a 12 or 16 volt system?

The wastegate has the 8.5 psi spring in it. I have a 16v setup with an alternator... the FAST clamps at 17 or 18V downtrack so who knows what it is....
red dragon
05-15-2007, 11:39 AM
A little extra insurance against leaning out... I have a Weldon 2035 on the car that will be marginal without an alternator on high boost...


Isn't that pump only good to about 1800hp? And with your setup at full boost I would expect you to be a little over 2200-2400.
Blackhawk
05-15-2007, 04:56 PM
Have you bought an AMS1000 yet?

doesn't sound like it. :D
Blackhawk
05-15-2007, 04:59 PM
The MSBC1 gets one more chance......

I have actually been thinking about designing my own...

:rolleyes: When your ready to upgrade, look me up. AMS1000.com
Andrew
05-15-2007, 09:11 PM
:rolleyes: When your ready to upgrade, look me up. AMS1000.com

I have an MSEE and design mixed signal ICs, 6 years experience.... don't think I could?
Blackhawk
05-15-2007, 10:17 PM
Have at it...

Or just take the easy road, and use what the world's fastest are using.

Keep in mind. The guy who helped write the program/algorithms for the MSBC, also designed the AMS to improve on all of the things he felt the MSBC lacked in terms of precision control.(see? all the work has been done for you.) :D