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Exhausted Tuner
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Discussion Starter #1 (Edited)
Btlfed1500 said:
Had a chance to do some tuning with a 2004 Pontiac GTO A4 - Magnacharged

Modifications:
Fuddle 3200 stall converter
K&N FIPK
MagnaFlow Catted mid-pipes
Custom MagnaFlow 3 muffler cat-back
90 MM TB
85 MM MAF


Bold items were added along with new supercharger housing

BLUE "BEFORE" Dyno - Custom Tune (Stock ported TB, OE MAF, Magancharger MP112 @ 11 PSI <1:1 rear drive / 2.9 front pulley>)street Tune 91 Octane

RED "AFTER" Dyno - Custom Tune (90 MM TB, 85MM MAF, MagnaVolt, Magnacharger MP122H MP122H @ 13 PSI <1:1 rear drive / 2.9 front pulley>)street Tune 91 Octane


MP112 Tuned (converter locked): 434 / 460
MP122H Tuned (converter locked): 485 / 457

67 Max RWHP increase
48 Max RWTQ increase

51 Peak RWHP increase
(-3) Peak RWTQ increase

Weather: 88-91* F / 17-21% Humidity

This is a WOT 2nd gear to 3rd gear pass on the dyno:


As you can see the minor trade off in torque is never seen in WOT 2nd, through the shift and 3rd gear (converter unlocked)

The gains were most impressive on paper BUT what really sells the upgrade is the feel. If you are a maggie owner / driver the feel is totally different. You never feel the sensation of the car topping out in the upper rpm band (5000-6500 rpm) ... it just keep pulling and pulling until the shift point. Don't forget this is a STOCK MANIFOLD car WITH CATS and a substantial exhaust system to suport street legal noise levels and interior comfort.

On a side note, some fueling issues need to be addressed at this point. The injector duty cucle is at 95% with the stock OE fuel pump and the Magnavolt. The fuel pressure drops from 60 to 50 PSI at WOT indicating a lack of volume under high demand.

Richard
MP122H revisited

8.1L Bucket and 255 LPH pump
60 lbs injectors

Here is the MP122H pre-fuel system and now post fuel system. Higher grade fuel was used to sustain timing. 91 Octane + torco

 

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Premium Member
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Sweet, Anymore details like AF or Injector Duty??

Good works guys.
 

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Exhausted Tuner
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Discussion Starter #3
ddawson said:
Sweet, Anymore details like AF or Injector Duty??

Good works guys.
Injector duty cycle is 72% and AF is totally controllable ... a flat A/F curve can be had from 11.5:1 from 3000-6500 or as high as 12.3:1 from 3000-6500. The new pump and injectors make for an easier car to tune.
 

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Was there any noticable decrease in Intake temps due to the more efficient blower or was it just offset by the increase in boost?

Maybe time for some alky to help with the timing and Intake temps.....

Amazing this thing is still on stock manifolds with cats.
 

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Bye Bye Goat..It's Been Fun
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LS2PWR said:
Was there any noticable decrease in Intake temps due to the more efficient blower or was it just offset by the increase in boost?

Maybe time for some alky to help with the timing and Intake temps.....

Amazing this thing is still on stock manifolds with cats.
The 122 runs about 15-20 degrees cooler in the iat department.:patriot:
 

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So a 122, an LS2 with headers and 500rwhp is in there like swimwear?
 

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Bye Bye Goat..It's Been Fun
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RookWV said:
So a 122, an LS2 with headers and 500rwhp is in there like swimwear?
I would sure hope so. The problem is, I don't know if they are going to be available. I recommend anyone that wants one start calling and bugging the guys at Magnuson.
 

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Please don't flame me for a dumbass noob off-topic question (just did the flaming for you).

This is an approximately 2000$ upgrade (plus labor and additional fuel system bits and pieces) on top of the 112 kit that's already paid for and installed. I can see how a 112 maggie owner would go for it, but if someone who is starting with a bone stock GTO, how much sence would this make as opposed to the upcoming APS TT kit (I've driven a number of TT kited 350z's, there is really no noticable lag per se, like in a 600whp single turbo supra for example, if a 3.5L V6 can feel almost lag-free, I can't see a 6.0L V8 having very noticable lag issues).
 

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Bye Bye Goat..It's Been Fun
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Oleg said:
Please don't flame me for a dumbass noob off-topic question (just did the flaming for you).

This is an approximately 2000$ upgrade (plus labor and additional fuel system bits and pieces) on top of the 112 kit that's already paid for and installed. I can see how a 112 maggie owner would go for it, but if someone who is starting with a bone stock GTO, how much sence would this make as opposed to the upcoming APS TT kit (I've driven a number of TT kited 350z's, there is really no noticable lag per se, like in a 600whp single turbo supra for example, if a 3.5L V6 can feel almost lag-free, I can't see a 6.0L V8 having very noticable lag issues).
It makes no sense at all to buy it that way. However, Magnuson does not want to spend the time and money to develop this as a kit. Think about it, they may sell what, 40 of them? From what has been explained to me, the expense to make new castings is very high. Not to mention, it is still yet to be determined if it will even fit under the hood. Magnuson could not make it happen. Neither have I, with the resources I have. However, I do know someone else who is going to give it a shot.

So, in short, the guys that have a 112 now can probably buy just the blower later, but they will need to get some machine work done to their parts to get this blower onto their manifold.

I do not work for Magnuson, so this is not "From the horses mouth" so to speak. I am just telling it how I see it.
 

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24v said:
It makes no sense at all to buy it that way. However, Magnuson does not want to spend the time and money to develop this as a kit. Think about it, they may sell what, 40 of them? From what has been explained to me, the expense to make new castings is very high. Not to mention, it is still yet to be determined if it will even fit under the hood. Magnuson could not make it happen. Neither have I, with the resources I have. However, I do know someone else who is going to give it a shot.

So, in short, the guys that have a 112 now can probably buy just the blower later, but they will need to get some machine work done to their parts to get this blower onto their manifold.

I do not work for Magnuson, so this is not "From the horses mouth" so to speak. I am just telling it how I see it.
Thank you. I was under an impression that the upgrade kit is already out. We'll see how things progress, if the 122 setup will be available as an off-the shelf kit and will be competitive with APS's TT setup, I may actually buy that one. I've been a sucker for a good blower ever since I saw Mad Max 2.
But with the hood clearence issue, this already is reminding me of the Stillen blower for the Z. Price is good, gains are decent, but 800-1000$ worth of bodywork is needed to alter the hood.
 
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