map sensor...
10-09-2003, 12:12 AM
#1
Supreme Member
Thread Starter
Join Date: Dec 2002
Location: Central FL
Posts: 2,564
Likes: 0
Received 1 Like
on
1 Post
Car: 91 Camaro
Engine: 3.1...not hardly stock
Transmission: 700r4....not stock either
Axle/Gears: 3.73
map sensor...
how far can a stock MAP sensor be pushed? can you run boost on it? if so, how much?
10-09-2003, 12:26 AM
#2
Supreme Member
Join Date: Aug 2002
Location: Gainesville, FL
Posts: 3,827
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1988 Chevy Camaro Hardtop
Engine: Turbocharged/Intercooled 3.1
Transmission: World Class T5 5 Speed
Can't run boost... stock MAP sensor runs out of 'reading' at 1 bar (WOT, remember - atmospheric pressure is 14.7psi!)
a 2 bar MAP will read up to 15psi, and a 3bar will read till 30.
a 2 bar MAP will read up to 15psi, and a 3bar will read till 30.
10-09-2003, 12:59 AM
#3
Supreme Member
Thread Starter
Join Date: Dec 2002
Location: Central FL
Posts: 2,564
Likes: 0
Received 1 Like
on
1 Post
Car: 91 Camaro
Engine: 3.1...not hardly stock
Transmission: 700r4....not stock either
Axle/Gears: 3.73
ok, thanks. do you know how much these cost and where they can be obtained?
10-09-2003, 12:59 AM
#4
Senior Member
Join Date: Jul 2003
Location: The Nest
Posts: 506
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1985 GMC Jimmy/1998 Chevy Malibu
Engine: 3.2L turbo Hybrid/bone stock 3100
Transmission: T-5 soon to be 700R4/4T40E
You can run bost on a 1 bar MAP sensor, it just won't read anything above approximatly 2 PSI, there is this margin in the variance of them.
I'm running about 6 PSI in 3rd and 4th gears, and so far everything seems OK, I'd still rather use a tuned PROM and 2 BAR MAP, but I am waiting for certain pieces to do so.
To use a 2 or 3 BAR MAO the PROM needs to be tuned for it, other wise the engine will not run right.
I'm running about 6 PSI in 3rd and 4th gears, and so far everything seems OK, I'd still rather use a tuned PROM and 2 BAR MAP, but I am waiting for certain pieces to do so.
To use a 2 or 3 BAR MAO the PROM needs to be tuned for it, other wise the engine will not run right.
10-09-2003, 02:04 AM
#5
Supreme Member
Join Date: Aug 2002
Location: Gainesville, FL
Posts: 3,827
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1988 Chevy Camaro Hardtop
Engine: Turbocharged/Intercooled 3.1
Transmission: World Class T5 5 Speed
Raven's correct... the easy part is getting the sensors... the hard part is calibrating the ECU. 
Easiest way would be convert your '730 ecu to a '749. Still running the idea of a S/C?
Easiest way would be convert your '730 ecu to a '749. Still running the idea of a S/C?
10-09-2003, 07:17 PM
#7
Senior Member
They help the ECM determine how much load the engine is under. They do this by mesuaring the amount of vaccum present. The faster you go or the more you Crack the throttle open the faster the in comming air goes by witch increase the vaccum in the intake.
MAP= Manifold Absolute Presure
MAP= Manifold Absolute Presure
Trending Topics
10-09-2003, 08:27 PM
#8
Senior Member
Join Date: Feb 2002
Location: Lehigh Valley, PA
Posts: 830
Likes: 0
Received 0 Likes
on
0 Posts
Car: 00 T/A Firehawk
Engine: 346ci LS1
Transmission: MN6
Axle/Gears: 3.42 LSD
So basically for any 3.1L thirdgen to be able to run boost, we would need to take care of the MAP sensor somehow...? This is what I am understanding from this...
10-10-2003, 03:05 PM
#9
Senior Member
Yes. New MAP and a custom Prom. You might be able to get a way with out the Prom, but should have it done for safty. To much pinging while running boost is a bad thing.
10-10-2003, 04:17 PM
#10
Member
Join Date: Apr 2003
Location: Ocala, FL
Posts: 254
Likes: 0
Received 0 Likes
on
0 Posts
Car: 95 Mustang GT Vert
Engine: 5.0
Transmission: T5
Originally posted by BitchinRS
They help the ECM determine how much load the engine is under. They do this by mesuaring the amount of vaccum present. The faster you go or the more you Crack the throttle open the faster the in comming air goes by witch increase the vaccum in the intake.
MAP= Manifold Absolute Presure
They help the ECM determine how much load the engine is under. They do this by mesuaring the amount of vaccum present. The faster you go or the more you Crack the throttle open the faster the in comming air goes by witch increase the vaccum in the intake.
MAP= Manifold Absolute Presure
The less throttle you have, the more vacuum (air being pulled into the cylinders)
The more you open the throttle, the less vacuum - less restriction going into the cylinders.
3.1 stock ECU/MAP reads 1 bar - WOT is atmospheric pressure (no restriction) which is 14.7 psi of pressure.
1 bar of 'boost' is really 14.7 psi of pressure, over atmospheric pressure. Your 'absolute' pressure is 29.4psi of total pressure, in the intake.
10-10-2003, 04:21 PM
#11
Member
Join Date: Apr 2003
Location: Ocala, FL
Posts: 254
Likes: 0
Received 0 Likes
on
0 Posts
Car: 95 Mustang GT Vert
Engine: 5.0
Transmission: T5
Oh yeah, Doward here btw -
You can switch the MAP and PROM, but the ECU itself is what can't read over 1 bar of pressure... hence going to the 749 - also speed density, and CAN read 2 bar!
You can switch the MAP and PROM, but the ECU itself is what can't read over 1 bar of pressure... hence going to the 749 - also speed density, and CAN read 2 bar!
10-14-2003, 09:35 AM
#13
Moderator
iTrader: (1)
Join Date: Mar 2002
Location: Chasing Electrons
Posts: 18,405
Likes: 0
Received 216 Likes
on
202 Posts
Car: check
Engine: check
Transmission: check
The easiest way to go boosted is to use the $8F mask from the Turbo GranPrix's (TGP). The TGP is a 3.1l front drive application that runs in the '730/'727 ECM. The '90-'92 f-body v6's use the '730 ECM.
As the $8F mask is based on the $88 mask (what is in your car now), the code is a drop in. Change the MAP sensor out for a 2 bar unit, install 22lb/hr injectors, burn a PROM and go. PLug & PLay at its finest.
RBob.
As the $8F mask is based on the $88 mask (what is in your car now), the code is a drop in. Change the MAP sensor out for a 2 bar unit, install 22lb/hr injectors, burn a PROM and go. PLug & PLay at its finest.
RBob.
10-14-2003, 04:26 PM
#14
Senior Member
Join Date: Feb 2002
Location: Lehigh Valley, PA
Posts: 830
Likes: 0
Received 0 Likes
on
0 Posts
Car: 00 T/A Firehawk
Engine: 346ci LS1
Transmission: MN6
Axle/Gears: 3.42 LSD
Originally posted by RBob
The easiest way to go boosted is to use the $8F mask from the Turbo GranPrix's (TGP). The TGP is a 3.1l front drive application that runs in the '730/'727 ECM. The '90-'92 f-body v6's use the '730 ECM.
As the $8F mask is based on the $88 mask (what is in your car now), the code is a drop in. Change the MAP sensor out for a 2 bar unit, install 22lb/hr injectors, burn a PROM and go. PLug & PLay at its finest.
RBob.
The easiest way to go boosted is to use the $8F mask from the Turbo GranPrix's (TGP). The TGP is a 3.1l front drive application that runs in the '730/'727 ECM. The '90-'92 f-body v6's use the '730 ECM.
As the $8F mask is based on the $88 mask (what is in your car now), the code is a drop in. Change the MAP sensor out for a 2 bar unit, install 22lb/hr injectors, burn a PROM and go. PLug & PLay at its finest.
RBob.
10-14-2003, 10:27 PM
#15
Supreme Member
Join Date: Aug 2002
Location: Gainesville, FL
Posts: 3,827
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1988 Chevy Camaro Hardtop
Engine: Turbocharged/Intercooled 3.1
Transmission: World Class T5 5 Speed
That's a new one on me, too! I'd love to try it out!!
10-15-2003, 09:50 AM
#16
Supreme Member
Thread Starter
Join Date: Dec 2002
Location: Central FL
Posts: 2,564
Likes: 0
Received 1 Like
on
1 Post
Car: 91 Camaro
Engine: 3.1...not hardly stock
Transmission: 700r4....not stock either
Axle/Gears: 3.73
sounds a lot better than swapping to the 749! i want to try one or the other. anybody got a used fageol for sale?
Thread
Thread Starter
Forum
Replies
Last Post
