 » Site Navigation | | | | » Recent Threads | | | |  |  |  | |  06-09-2011, 09:34 PM | #1 | | Junior Member Join Date: May 2011 Location: Dalton, GA Posts: 9 |  M44 3.4" Pulley
Ok, waiting on someone to say search, but here goes..
Have a m44 (OBDII) with a dasc stock tune, cai and exhaust. Planning on swapping the stock pulley for the 3.4" pulley. Only scare is running hot, be alright without a meth kit, and sitting on stock tune? Thanks guys |  |  | | 06-10-2011, 06:30 AM | #2 | | Senior Member Join Date: Dec 2007 Location: Gulfport, Florida Posts: 3,208 |
Quote: Originally Posted by setho1993  Ok, waiting on someone to say search, but here goes..
Have a m44 (OBDII) with a dasc stock tune, cai and exhaust. Planning on swapping the stock pulley for the 3.4" pulley. Only scare is running hot, be alright without a meth kit, and sitting on stock tune? Thanks guys | Ok I have a lot of experience with this stuff. You will most likely get away with the 3.4" pulley on the stock setup. You should have around 8.5psi now stock with the 3.6" and you will be around 10.5psi with the pulley change. The RRFPR will add the extra fuel needed but it is not as safe since your fuel pump is running at a very high pressure plus it's not as accurate or tuned correctly. With a proper tune and 30# injectors, plus adding a 1995 M3 3" MAF it will open the intake up and allow more air flow. I've seen people do this 3.4" without the tune and not have any issues but to really feel the power you need a tune and 1995 3" M3 MAF to let it breath and get that air in the SC so it can be compressed and boost the motor correctly. A RRFPR is a half-ass way to add fuel to a boosted application and you will really enjoy a correct tune with the correct injectors, larger MAF, timing changes, etc if you choose that route. No Meth needed unless you go to the 3.2" pulley which will be 15psi and then you better hold on since your car will be beating M3's all day long Best, John Smith | | | | | 06-10-2011, 05:26 PM | #3 | | Junior Member Join Date: May 2011 Location: Dalton, GA Posts: 9 |
Quote: Originally Posted by xxxJohnBoyxxx Ok I have a lot of experience with this stuff. You will most likely get away with the 3.4" pulley on the stock setup. You should have around 8.5psi now stock with the 3.6" and you will be around 10.5psi with the pulley change. The RRFPR will add the extra fuel needed but it is not as safe since your fuel pump is running at a very high pressure plus it's not as accurate or tuned correctly.
With a proper tune and 30# injectors, plus adding a 1995 M3 3" MAF it will open the intake up and allow more air flow. I've seen people do this 3.4" without the tune and not have any issues but to really feel the power you need a tune and 1995 3" M3 MAF to let it breath and get that air in the SC so it can be compressed and boost the motor correctly.
A RRFPR is a half-ass way to add fuel to a boosted application and you will really enjoy a correct tune with the correct injectors, larger MAF, timing changes, etc if you choose that route.
No Meth needed unless you go to the 3.2" pulley which will be 15psi and then you better hold on since your car will be beating M3's all day long
Best, John Smith | Appreciate it John, Yeah I really wana go to 3.2" might just have to break down and do it. What all would I need to hit in the tune just to make sure I don't miss anything. Might just go ahead and do the whole banana at 15 psi suggestions? By the way how did bearings hold up, heard you had yours for awhile. | | | | | 06-11-2011, 01:05 AM | #4 | | Senior Member Join Date: Dec 2007 Location: Gulfport, Florida Posts: 3,208 |
Quote: Originally Posted by setho1993 Appreciate it John, Yeah I really wana go to 3.2" might just have to break down and do it. What all would I need to hit in the tune just to make sure I don't miss anything. Might just go ahead and do the whole banana at 15 psi suggestions? By the way how did bearings hold up, heard you had yours for awhile. | No issues with bearing or anything. Ran 50K on 15psi and retired that motor at 173K. Checked out perfect at Metric when they tore it down You would need a Nick G TT stage 3 and meth kit to run 15psi plus a clutch to handle the extra HP & Torque | | | | | 07-26-2011, 03:00 PM | #5 | | Member Join Date: Jul 2011 Location: Northampton, UK Posts: 35 |
This is some information I was looking for. Would the uprated clutch be needed at 10psi? What clutch would be needed? Mine was recently changed so I don't want to change unless it's absolutely necessary. | | | | | 07-30-2011, 05:35 PM | #6 | | Senior Member Join Date: Dec 2007 Location: Gulfport, Florida Posts: 3,208 |
Quote: Originally Posted by Prince This is some information I was looking for. Would the uprated clutch be needed at 10psi? What clutch would be needed? Mine was recently changed so I don't want to change unless it's absolutely necessary. | My stock clutch was ok at 10psi. It should be ok until you hit 15psi then it is slip city | | | | | 07-30-2011, 08:50 PM | #7 | | Member Join Date: Jul 2011 Location: Northampton, UK Posts: 35 |
Quote: Originally Posted by xxxJohnBoyxxx My stock clutch was ok at 10psi. It should be ok until you hit 15psi then it is slip city | Thanks for that mate! Is it worth going for a lightened flywheel or anything like that? | | | | | 07-30-2011, 10:38 PM | #8 | | Senior Member Join Date: Dec 2007 Location: Gulfport, Florida Posts: 3,208 |
^^Depends on your cash-flow. I run a 9# billet flywheel. I did notice a nice increase in how fast the motor revs. The stock dual-mass flywheel is like 29# and every 1 pound of rotating mass you remove is like removing 15# of car weight. So if you take the 29# flywheel and install a 9# flywheel you remove 20# of rotating mass or 20x15=300. It is like removing 300 pounds of car weight by going with the light flywheel. Also the same for all rotational mass, rims/tires, motor rotational parts, etc. All these little tricks add up and make a very fast I-4 car. | | | | | 07-31-2011, 02:23 PM | #9 | | Member Join Date: Jul 2011 Location: Northampton, UK Posts: 35 |
Quote: Originally Posted by xxxJohnBoyxxx ^^Depends on your cash-flow. I run a 9# billet flywheel. I did notice a nice increase in how fast the motor revs. The stock dual-mass flywheel is like 29# and every 1 pound of rotating mass you remove is like removing 15# of car weight. So if you take the 29# flywheel and install a 9# flywheel you remove 20# of rotating mass or 20x15=300. It is like removing 300 pounds of car weight by going with the light flywheel. Also the same for all rotational mass, rims/tires, motor rotational parts, etc. All these little tricks add up and make a very fast I-4 car. | Cash flows not amazing by any means, but I want things to be done properly. Thanks for the advice as well, I will definitely take it on board and start looking up costs. | | | | | 08-01-2011, 05:06 PM | #10 | | Junior Member Join Date: May 2011 Location: Dalton, GA Posts: 9 |
Question i didnt think of what kinda diff did you go for? Looking for a medium case e30. Straight swap? Ratio? | | | | | 08-01-2011, 05:58 PM | #11 | | Senior Member Join Date: Dec 2007 Location: Gulfport, Florida Posts: 3,208 |
Quote: Originally Posted by setho1993 Question i didnt think of what kinda diff did you go for? Looking for a medium case e30. Straight swap? Ratio? | Can't help on the model. I run a E36 318is coupe so I run all 328 or M3 stuff. I have a medium case LSD with 3.23 gears. I run 17" rims/tires. Cruise is about 80mph at 3,500rpm | | | | | 08-01-2011, 07:27 PM | #12 | | Senior Member Join Date: Jan 2011 Location: south wales uk Posts: 135 |
what power was your putting out in the end john?
did you have it rolling roaded? as i wouldnt mind seeing the printouts to see how the power and torque at different revs compair to that of the 328i's | | | | | 08-01-2011, 08:02 PM | #13 | | Senior Member Join Date: Dec 2007 Location: Gulfport, Florida Posts: 3,208 |
Quote: Originally Posted by m44lee what power was your putting out in the end john?
did you have it rolling roaded? as i wouldnt mind seeing the printouts to see how the power and torque at different revs compair to that of the 328i's | Sorry no dyno testing when I had the DASC. I think Pat Nosker has his dyno sheets up and we ran the exact same boost and shot meth on the stock motor. I think he was around 250 at 15psi | | | | | 08-01-2011, 08:30 PM | #14 | | Senior Member Join Date: Jan 2011 Location: south wales uk Posts: 135 |
ok thats not bad!  is that fly? or at the wheels? do you know of any dyno results using the 3.4 pulley 10-12 psi or whatever it is? just wanna know what results i should be expecting for when i have it mapped soon i'm dying to beat a mates 328 down a 1/4 mile strip!  he'd be gutted if a 4 pot beat him!  | | | | | 08-01-2011, 09:50 PM | #15 | | Junior Member Join Date: May 2011 Location: Dalton, GA Posts: 9 |
Quote: Originally Posted by m44lee ok thats not bad! is that fly? or at the wheels? do you know of any dyno results using the 3.4 pulley 10-12 psi or whatever it is? just wanna know what results i should be expecting for when i have it mapped soon i'm dying to beat a mates 328 down a 1/4 mile strip! he'd be gutted if a 4 pot beat him! | Has to be at the wheels. Guy I bought mine from had it dynoed  | | | | | |
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