Maggie 112, valve float or out of blower ?
11-21-2012, 05:21 AM
#23
Besides, most of the guys who have these blowers aren't after peak numbers anyways, if they were, they bought the wrong system.
11-27-2012, 01:51 AM
#25
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Just love how you act like people are just making stuff up
Ddawson for instance is a mod on LS1GTO and a local member to me. Had his car tuned and dynoed at the most respected shop in this area. Bottom line is a basically stock LS2 can put down 480-500 WHP with a Maggie 112. Mine put down 480 with shorty headers being my only other "power" mod. I have since dropped from the 2.7 pulley to a 2.6 pulley and gained 2 MPH at the track with a slightly worse DA. Pretty sure that puts mine a tick above 500 WHP now. Getting another 40 WHP out of a mild sized cam only will get me to the 550 range and that is without adding heads or Long tubes. so hate all you want but the 112 is a very solid 550-600 WHP capable blower on a LS2 anyway.
11-27-2012, 05:59 AM
#26
I'm not hating, but what you don't understand is with a blower, you don't just magically gain more horsepower with bigger cams or exhaust work, it's not like N/A. The blower can only flow so much air before it won't push anymore, all you do if you spin it faster is cause it to heat the air even more.
The point of this thread was tying to help out a guy who is at the limit of his blower. To try and tell him that it will magically make another 50-70hp is just wrong.
Can you get a money shot dyno sheet, sure. Ice the blower, turn up the timing, lean it out a little, and for one or two pulls, you might see over 550rwhp, but by the end of the run your IAT's are going to be through the roof.
I'm running a D1SC, and I understand completely about coming to the limit of the blower. Spinning it faster doesn't always produce more power.
The point of this thread was tying to help out a guy who is at the limit of his blower. To try and tell him that it will magically make another 50-70hp is just wrong.
Can you get a money shot dyno sheet, sure. Ice the blower, turn up the timing, lean it out a little, and for one or two pulls, you might see over 550rwhp, but by the end of the run your IAT's are going to be through the roof.
I'm running a D1SC, and I understand completely about coming to the limit of the blower. Spinning it faster doesn't always produce more power.
11-27-2012, 10:21 AM
#27
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Alchemist I understand what your saying, the question I have is let's say your making 480rwhp @10lb's boost, so you put on a set of 243 heads and a small cam and now your at 500-510rwhp @8lb's are the IAT's going to be lower?
Your spinning the blower just as fast but since you have better flow is that going to make any difference in the IAT's?
Your spinning the blower just as fast but since you have better flow is that going to make any difference in the IAT's?
11-27-2012, 11:27 AM
#28
I'm not an expert with positive displacement blowers, but the guys above are far more experienced than I am, but from everything I've read, and seen, the 112 just doesn't move enough air, and you get to a certain point that it just gets hotter and doesn't produce more power or boost.
11-27-2012, 10:26 PM
#29
Truth be told everyone here has a good point to make. Alchemist is right, at the end of he day the 112 is good for certain amount of flow and that's it. Science and physics is a definite process and my blower certainly has its limitations given its size. The other side of the coin is that it certainly can produce power in the mid 5xx (anymore is a push and inefficient at that) however, the torque under the curve ... Down low where I like it, is huge by any standards. At any rate, here is what I've found so far:
After adjusting my throttle to hit WOT we found 515 rwhp ( Mustang Dyno) The interesting part of this experiment is that the torque was so much of an increase that the wheels spun on the Dyno. We literally had two people sitting on the back deck and a passenger in the seat ( still spun the wheels until the upper RPM range). Now that's no sign of anything other than it never reacted like that before, this tells me that the extra throttle has increased my torque & HP. In addition, my boost peaked at 8.1 lbs and dropped to 6.9 at 6300 rpm. That's far better than before ( now I am out of blower, or the belt is slipping on top) . We also found that my fuel system was maxed out at the top end and could not hit the nitrous for that reason. Within the next three weeks I plan on upgrading the fuel system, as this is dangerous in my opinion. In addition we are going with the SD tune and I will put on a heavy duty tensioner from ECS.
IATs were at 135* after four pulls, that's high however for a maggie that seems to be the way of life. AFR was 11.5 across the spectrum and timing was at 21*
( no sign of knock). On the street the car is a complete beast, the additional power was evident the moment I drove it. My goal is for the " seat of the pants" thrill ..... I'm there ! Will this blower get me to 600 HP ( NO .. And I don't care what the numbers say). This car is a blast to drive and who can argue with that.
I'll post up the results in a few weeks after the SD tune and extra fuel pump is in. I'm not expecting a drastic change in the numbers other than the benefit of a small 50 shot as it pertains to cooling and power added.
To put a point to this rant ... At the end of the day, with allllll of my mods ..... The typical 112 is limited to a peak of mid 500 's. but the street performance holds with the best of them.
After adjusting my throttle to hit WOT we found 515 rwhp ( Mustang Dyno) The interesting part of this experiment is that the torque was so much of an increase that the wheels spun on the Dyno. We literally had two people sitting on the back deck and a passenger in the seat ( still spun the wheels until the upper RPM range). Now that's no sign of anything other than it never reacted like that before, this tells me that the extra throttle has increased my torque & HP. In addition, my boost peaked at 8.1 lbs and dropped to 6.9 at 6300 rpm. That's far better than before ( now I am out of blower, or the belt is slipping on top) . We also found that my fuel system was maxed out at the top end and could not hit the nitrous for that reason. Within the next three weeks I plan on upgrading the fuel system, as this is dangerous in my opinion. In addition we are going with the SD tune and I will put on a heavy duty tensioner from ECS.
IATs were at 135* after four pulls, that's high however for a maggie that seems to be the way of life. AFR was 11.5 across the spectrum and timing was at 21*
( no sign of knock). On the street the car is a complete beast, the additional power was evident the moment I drove it. My goal is for the " seat of the pants" thrill ..... I'm there ! Will this blower get me to 600 HP ( NO .. And I don't care what the numbers say). This car is a blast to drive and who can argue with that.
I'll post up the results in a few weeks after the SD tune and extra fuel pump is in. I'm not expecting a drastic change in the numbers other than the benefit of a small 50 shot as it pertains to cooling and power added.
To put a point to this rant ... At the end of the day, with allllll of my mods ..... The typical 112 is limited to a peak of mid 500 's. but the street performance holds with the best of them.
12-31-2012, 03:13 AM
#36
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I am actually running the same MPH and better ET at the same track with another GTO owner who has a TVS1900 with more boost then I am running. Could be his tune I dont know. He is also an A4. He actually accused me of having a small cam in mine since my little 112 shouldnt be able to trap that high 
As others have said they are a complete blast as a DD. Mean as hell pretty much anywhere you stab the throttle.
As others have said they are a complete blast as a DD. Mean as hell pretty much anywhere you stab the throttle.
12-31-2012, 03:31 AM
#37
Just love how you act like people are just making stuff up Ddawson for instance is a mod on LS1GTO and a local member to me. Had his car tuned and dynoed at the most respected shop in this area. Bottom line is a basically stock LS2 can put down 480-500 WHP with a Maggie 112. Mine put down 480 with shorty headers being my only other "power" mod. I have since dropped from the 2.7 pulley to a 2.6 pulley and gained 2 MPH at the track with a slightly worse DA. Pretty sure that puts mine a tick above 500 WHP now. Getting another 40 WHP out of a mild sized cam only will get me to the 550 range and that is without adding heads or Long tubes.
so hate all you want but the 112 is a very solid 550-600 WHP capable blower on a LS2 anyway.
Ddawson for instance is a mod on LS1GTO and a local member to me. Had his car tuned and dynoed at the most respected shop in this area. Bottom line is a basically stock LS2 can put down 480-500 WHP with a Maggie 112. Mine put down 480 with shorty headers being my only other "power" mod. I have since dropped from the 2.7 pulley to a 2.6 pulley and gained 2 MPH at the track with a slightly worse DA. Pretty sure that puts mine a tick above 500 WHP now. Getting another 40 WHP out of a mild sized cam only will get me to the 550 range and that is without adding heads or Long tubes. so hate all you want but the 112 is a very solid 550-600 WHP capable blower on a LS2 anyway.
03-04 cobras with full race ports and long tubes only make a tad over 500 on pump gas and they run eaton 112s also.
12-31-2012, 12:34 PM
#38
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Lol just gotta ask if its so capable, why havent I seen it yet? There are thousnads of 112s out there and Ive yet to see any even remotely clsoe to 600. Even 550 are heads/cam/long tubes/ e85 cars.
03-04 cobras with full race ports and long tubes only make a tad over 500 on pump gas and they run eaton 112s also.
03-04 cobras with full race ports and long tubes only make a tad over 500 on pump gas and they run eaton 112s also.
Not sure what you are LOL about since I already proved 550 mark is EASILY attainable. Hell mine is right at 500 with worthless shorty headers, STOCK cam, STOCK heads, STOCK airbox and their horrible intercooler. I have gone to a 2.6 pulley since it was dynoed at the 480 and that is where I am getting the 500 from. Might evne be a tad higher as others have run over 500 with the same setup. Oh 91 octane to boot. I know another member making 520ish on stock cam as well and a 2.6 pulley. These are without even touching the TB . $20 heatercore mod and I dont even get heatsoak now which I proved with about 5 hot laps within 15 min period last time out to track.
As for cobras not so sure whats so impressive about that. Forged internals they can run a lot more boost. LSx are making these numbers with 8-10 PSI.
These blowers might not be the best thing since sliced bread but that are very good and very respectable.
12-31-2012, 07:50 PM
#40
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Well the issue was dyno numbers so is there a better thing to quote other then real world dyno numbers ? Perhaps we should all just keep guessing at what they can make ... lol