When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
You are going to limp mode your car with any more pressure. You will need a map clamp. Do you have long tube headers yet?
no I dont. I have the raceIQ tune for it and it runs 10.5 AFR now... I assume that is a tunning issue they can fix when i go to the smaller pulley?
mods include:
Rebuilt SC
Rebuilt Motor
Rebuilt Trans
3.5" Intake
Midlength headers
74mm fixed pulley
tune from race IQ
DRLs
Euroteck diffuser carbon
Carbon Side splitters
E63 Bumper Carbon Spoiler
carbon mirror covers
Custom headlights HID Kit
Secondary HE Superflo pump
Trunk tank and install kitV3 HECustom
3" Exhaust
550 cc injectors
adapter harnesses
Looped rail
One step Colder Plugs
Intake Scoops
3 piece pulley set
Belt Wrap Kit and green belt
82mm TB with ported snout
TCU
Powdercoated Surge tanks
Wrap in cooper
Carbon interior
Caron steering wheel
Freenavi with data logger
Stop Tech Rotors, Pads,lines
with headers 74 and stock 154 crank you should be around 14.5-15 psi, stock 154 crank and 70mm with headers will put you around 15.5-16psi so about a 1 psi increase
with headers 74 and stock 154 crank you should be around 14.5-15 psi, stock 154 crank and 70mm with headers will put you around 15.5-16psi so about a 1 psi increase
That chart is just an estimate and not accurate. Elevation, DA, certain mods like headers, ported heads and throttle bodies change this. I had a 74 in the past and only saw 8-9psi peak boost. My buddy that lives near atco was seeing 16-17psi with just a 77 with long tubes and a 82 tb. This is why you need to datalog and not guess.
no I dont. I have the raceIQ tune for it and it runs 10.5 AFR now... I assume that is a tunning issue they can fix when i go to the smaller pulley?
mods include:
Rebuilt SC
Rebuilt Motor
Rebuilt Trans
3.5" Intake
Midlength headers
74mm fixed pulley
tune from race IQ
DRLs
Euroteck diffuser carbon
Carbon Side splitters
E63 Bumper Carbon Spoiler
carbon mirror covers
Custom headlights HID Kit
Secondary HE Superflo pump
Trunk tank and install kitV3 HECustom
3" Exhaust
550 cc injectors
adapter harnesses
Looped rail
One step Colder Plugs
Intake Scoops
3 piece pulley set
Belt Wrap Kit and green belt
82mm TB with ported snout
TCU
Powdercoated Surge tanks
Wrap in cooper
Carbon interior
Caron steering wheel
Freenavi with data logger
Stop Tech Rotors, Pads,lines
Goodyear Eagle® F1 Asymmetric 3
Slap on a set of long tube headers to drop the boost a bit more over the mid lengths. Contact Race IQ to adjust that tune a bit to lean it out closer to low 11s.
That chart is just an estimate and not accurate. Elevation, DA, certain mods like headers, ported heads and throttle bodies change this. I had a 74 in the past and only saw 8-9psi peak boost. My buddy that lives near atco was seeing 16-17psi with just a 77 with long tubes and a 82 tb. This is why you need to datalog and not guess.
x2. If you are seeing 16-17 PSI right now with the 74mm through torque, that means your ECU is seeing it. Car goes limp mode if the MAP sensor sees right around 17.5PSI so you are already very close (all it takes is one blip split second single read of too much pressure). If you go to 70mm you will limp mode the car on WOT pulls. Unless you either get a MAP clamp or get some legit long tube headers and get a couple of PSI decrease from the mids to the LTH (I dont know how much more flow you will achieve from mids to LTHs, so still a little bit of a gamble if it doesn't drop pressure enough.)
That chart is just an estimate and not accurate. Elevation, DA, certain mods like headers, ported heads and throttle bodies change this. I had a 74 in the past and only saw 8-9psi peak boost. My buddy that lives near atco was seeing 16-17psi with just a 77 with long tubes and a 82 tb. This is why you need to datalog and not guess.
thanks for the info I never took this into consideration, what is DA? i see it mentioned here all the time
x2. If you are seeing 16-17 PSI right now with the 74mm through torque, that means your ECU is seeing it. Car goes limp mode if the MAP sensor sees right around 17.5PSI so you are already very close (all it takes is one blip split second single read of too much pressure). If you go to 70mm you will limp mode the car on WOT pulls. Unless you either get a MAP clamp or get some legit long tube headers and get a couple of PSI decrease from the mids to the LTH (I dont know how much more flow you will achieve from mids to LTHs, so still a little bit of a gamble if it doesn't drop pressure enough.)
I went from EC mids to Maximizer long tubes. I saw around 1psi in boost drop.
thanks for the info I never took this into consideration, what is DA? i see it mentioned here all the time
Density Altitude. It helps racers confirm the quality of the air. The higher the DA the less oxygen is available for the engine to use. Less oxygen, less power and slower times. The lower DA the better. Sometimes is so low it goes negative. When its negative expect to run better. Better air, more boost, more power, faster times. There are apps available for your phone that helps give you DA. Drag Times, That Racing Channel are example of apps.
Fyi ,your car is not seeing 18 psi boost ,your in - vac ..lol
He didn't say 18, he said 16-17 peak. In torque that little red mark (that is sitting right on 16psi in his pic) indicates the peak value seen during that session (and the indicator can be manually reset if you want to).
I have a 77 SC and stock crank, gutted exhaust to muffler with the kleemann mids...I see like 13.7 actual boost, the torque app sees a spike sometimes a touch over 14 but I don't really count that I just assume its for a brief second at like gearshift or some ****.. How do you get so much more boost than me? I'm at sea level too! Pretty sure I don't have airleaks, havent smoke tested but exhausted a can of brake cleaner checking for intake leaks..
I could care less ,but you would hit limp at 17 psi FYI .The Elm is not accurate and only way your seeing that high is top of 4th gear maybe to 5 th gear
My E55 is seeing 19psi and no limp mode at all. I'm stacked 83/180 and LTH.
Originally Posted by drothgeb
x2. If you are seeing 16-17 PSI right now with the 74mm through torque, that means your ECU is seeing it. Car goes limp mode if the MAP sensor sees right around 17.5PSI so you are already very close (all it takes is one blip split second single read of too much pressure). If you go to 70mm you will limp mode the car on WOT pulls. Unless you either get a MAP clamp or get some legit long tube headers and get a couple of PSI decrease from the mids to the LTH (I dont know how much more flow you will achieve from mids to LTHs, so still a little bit of a gamble if it doesn't drop pressure enough.)
I consistently saw 17psi when I first started racing my E55 and zero limp mode ever. I'm now 83/180 stacked and seeing 19psi in the heat. I expect 20 or more when it cools down.
Originally Posted by oneslow55
I could care less ,but you would hit limp at 17 psi FYI .The Elm is not accurate and only way your seeing that high is top of 4th gear maybe to 5 th gear
I consistently saw 17psi when I first started racing my E55 and zero limp mode ever. I'm now 83/180 stacked and seeing 19psi in the heat. I expect 20 or more when it cools down.
Interesting. I wonder if it's a model year/firmware version type thing.
How do you get that read out into the car's dash screen? I have for 4 years now, run a Race IQ tune on a 74mm fixed pulley with EC stage 2 parts, no cats. I love the jumpy throttle response you don't get with the clutched pulley. I have read the the efficiency of the blower starts reducing rapidly if you spin it faster than a 74mm pulley does.
How do you get that read out into the car's dash screen? I have for 4 years now, run a Race IQ tune on a 74mm fixed pulley with EC stage 2 parts, no cats. I love the jumpy throttle response you don't get with the clutched pulley. I have read the the efficiency of the blower starts reducing rapidly if you spin it faster than a 74mm pulley does.
. That's a torque display on an android head unit. And this is a couple year old thread ;-)
11-15-2018, 12:36 AM
How do you get so much more boost than me? I'm at sea level too! Pretty sure I don't have airleaks, havent smoke tested but exhausted a can of brake cleaner checking for intake leaks..
