FWD dyno for Mazda Speed 6 - Mazda 6 Forums : Mazda 6 / Mazda Atenza Forum

josh04m6 · 01-20-2009, 02:20 PM

I want to dyno my 2007 Mazda Speed 6 but there is not anywhere in my state that has a AWD dyno. Is it possible to convert the car to front wheel drive so It can be put on a regular 2 wheel Dyno Jet??

I searched the forums but I did not find what I was looking for. Please help!!!

Thanks

jd42 · 01-20-2009, 02:25 PM

QUOTE (josh04m6 @ Jan 20 2009, 02:20 PM)

Quote:

I want to dyno my 2007 Mazda Speed 6 but there is not anywhere in my state that has a AWD dyno. Is it possible to convert the car to front wheel drive so It can be put on a regular 2 wheel Dyno Jet??[/b]

Lifting the parking brake lever disengages the rear clutch pack, but I don't think I'd want to rely on this for a dyno run. What if the mechanism suddenly engages for some reason during a run? Yikes!

Probably your best bet would be to physically disconnect the rear drive shaft.

Of course, such a setup wouldn't be very accurate for measuring absolute power delivery at the wheels. I guess you could do some basic engine tuning.

knyghtryda · 01-20-2009, 02:27 PM

QUOTE (josh04m6 @ Jan 20 2009, 11:20 AM)

Quote:

I want to dyno my 2007 Mazda Speed 6 but there is not anywhere in my state that has a AWD dyno. Is it possible to convert the car to front wheel drive so It can be put on a regular 2 wheel Dyno Jet??

I searched the forums but I did not find what I was looking for. Please help!!!

Thanks[/b]

short answer.... probably.

Long answer... you can disconnect the rear clutch electronically somehow, and that'll stop power going to the rear. You can also pull the handbrake, which should tell the sensor to do the same thing. My question to you is why, and what do you hope to glean from this experiment?

josh04m6 · 01-20-2009, 02:38 PM

QUOTE (knyghtryda @ Jan 20 2009, 11:27 AM)

Quote:

short answer.... probably.

Long answer... you can disconnect the rear clutch electronically somehow, and that'll stop power going to the rear. You can also pull the handbrake, which should tell the sensor to do the same thing. My question to you is why, and what do you hope to glean from this experiment?[/b]

You mean dyno numbers. I'm doing it for a tuning session. I really only want answers from people who actually knows what works and what doesn't.

I am doing basic mods and I would like to have a before and after dyno chart. I don't just want to guess how much of a gain I am getting with the addition of the modifications and tuning.

b12sentra · 01-20-2009, 05:51 PM

If you are only doing moderate modifications then I dont' know that it's worth alot of trouble to find one once you figure in the cost of the test and everything.

Would a DashHawk work out good enough to help?

smoker6 · 01-20-2009, 05:55 PM

Trying to tune an AWD vehicle on a FWD dyno can't be good. The ebrake bit shouldn't work. IIRC you have to be in motion to disconnect the rear diff with the ebrake (it reengages then if you brake hard for example), and you can't really pull the ebrake in motion on the FWD dyno. lol If we had electronic control of the rear diff that'd be cool, but we don't.

MS6 P.C. · 01-21-2009, 12:03 PM

There is a member here who claims he dynoed his on 2-wd dyno. Cant recall exactly who, but I will search around for him. Theres also a box (cant remeber if its under the dash or the seat) but its the box for our AWD.

josh04m6 · 01-21-2009, 02:57 PM

Mazspd6,
Maybe its not worth the trouble to you , but it is to me.

Smoker6,
Are you just assuming it isn't good? DSM owners have been converting their awd cars to fwd for years and strapping them on dynos. I don't think Mazda would let the car go into FWD mode with the ebrake trick if it was harmful to the car.

smoker6 · 01-21-2009, 04:03 PM

I have absolutely no useful opinion on whether it's ok or not to tune an AWD car in FWD mode. I simply know nothing about it, and thus what I wrote on that was intended to be nothing more than speculative rubbish. lol As to the ebrake trick, what I meant is that the guy that figured it out in detail and hooked up a switch said AWD reengages if you brake hard, and sometimes even randomly after a certain period of time. My point was thus only that it seems it might throw off your results.

Cliff notes: Ignore the bit about FWD tuning, IDK anything about it. Do you think you'll get consistently accurate results with the ebrake pulled to disengage the rear diff if, from what I've read, the car may reengage it without you wanting it to?

MS6 P.C. · 01-22-2009, 05:15 PM

PM freekwonder(sp?), He is the one that dynoed on 2wd dyno. Give us details or unless he wants to add anything

01-20-2009, 02:20 PM	#1 (permalink)
josh04m6 Learners License Join Date: Mar 2008 Location: Shawnee Oklahoma Posts: 20 Thanks: 0 Thanked 0 Times in 0 Posts Groans: 0 Groaned at 0 Times in 0 Posts iTrader: 0 reviews	I want to dyno my 2007 Mazda Speed 6 but there is not anywhere in my state that has a AWD dyno. Is it possible to convert the car to front wheel drive so It can be put on a regular 2 wheel Dyno Jet?? I searched the forums but I did not find what I was looking for. Please help!!! Thanks __________________ 2004 M6i ATX, Intake, Exhaust, NGK Iridium Plugs

01-20-2009, 05:51 PM	#5 (permalink)
b12sentra Track Racer Join Date: Oct 2006 Location: Raleigh, NC Posts: 759 Thanks: 0 Thanked 2 Times in 2 Posts Groans: 0 Groaned at 0 Times in 0 Posts iTrader: 0 reviews	If you are only doing moderate modifications then I dont' know that it's worth alot of trouble to find one once you figure in the cost of the test and everything. Would a DashHawk work out good enough to help? __________________ '06 Speed6 RPM Street springs, TWM S.S.&bushings, Cobb Tpi, ETS 3.25, 19's w/Bridgestone RE960's, SU BOV, Mazdaspeed CAI, Corksport tower brace, JDM tails, SPC ball joints, SU engine mount, Turbo XS Race Pipe, Technafit brake lines, full syn., Prosport bst ga., shark fin. The difference between stupidity and genius is that genius has its limits.

01-20-2009, 05:55 PM	#6 (permalink)
smoker6 Mazda Guru Join Date: Feb 2007 Location: Midlothian, VA Posts: 3,533 Thanks: 4 Thanked 26 Times in 18 Posts Groans: 0 Groaned at 2 Times in 1 Post iTrader: 0 reviews	Trying to tune an AWD vehicle on a FWD dyno can't be good. The ebrake bit shouldn't work. IIRC you have to be in motion to disconnect the rear diff with the ebrake (it reengages then if you brake hard for example), and you can't really pull the ebrake in motion on the FWD dyno. lol If we had electronic control of the rear diff that'd be cool, but we don't. __________________ '06 Black Cherry Mica Speed6 Since 2-26-07 \| 0-60: 3.87s \| CPE CAI, SU MM, SU Boost and Recirc Tubes, Synapse BPV, Magnaflow 2.5" CBE, MDS DashHawk, TWM SS Stage 1 w/Bushings, TT Front MM, TT Rear Diff Mount, SU StiffDiff, Whiteline RSB, CX-7 Antenna, BC Coilovers, mrlilguy CDFP, CPE Catted DP, HKS Twin Power Ignition System, RAYS Gram Lights 57 Maximum Time Attack, CPE TIP, Denso 2Step Colder Spark Plugs, COBB Shifter Weight, SPC Ball Joints, VTCS, BS, & EGR Delete, VentPod w/VEI Boost Guage, Saikou Michi CC, Labonte ISG-S3, GT2871r, DNP manifold, Tial 44mm EWG, Cobb AP, TT Liquid to Air Intercooler. Spare GT2871r for sale.

01-21-2009, 12:03 PM	#7 (permalink)
MS6 P.C. Rally Racer Join Date: Apr 2006 Location: Sunny Florida Posts: 1,287 Thanks: 0 Thanked 0 Times in 0 Posts Groans: 0 Groaned at 0 Times in 0 Posts iTrader: 0 reviews	There is a member here who claims he dynoed his on 2-wd dyno. Cant recall exactly who, but I will search around for him. Theres also a box (cant remeber if its under the dash or the seat) but its the box for our AWD. __________________ gone.

01-21-2009, 02:57 PM	#8 (permalink)
josh04m6 Learners License Join Date: Mar 2008 Location: Shawnee Oklahoma Posts: 20 Thanks: 0 Thanked 0 Times in 0 Posts Groans: 0 Groaned at 0 Times in 0 Posts iTrader: 0 reviews	Mazspd6, Maybe its not worth the trouble to you , but it is to me. Smoker6, Are you just assuming it isn't good? DSM owners have been converting their awd cars to fwd for years and strapping them on dynos. I don't think Mazda would let the car go into FWD mode with the ebrake trick if it was harmful to the car. __________________ 2004 M6i ATX, Intake, Exhaust, NGK Iridium Plugs

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01-21-2009, 04:03 PM	#9 (permalink)
smoker6 Mazda Guru Join Date: Feb 2007 Location: Midlothian, VA Posts: 3,533 Thanks: 4 Thanked 26 Times in 18 Posts Groans: 0 Groaned at 2 Times in 1 Post iTrader: 0 reviews	I have absolutely no useful opinion on whether it's ok or not to tune an AWD car in FWD mode. I simply know nothing about it, and thus what I wrote on that was intended to be nothing more than speculative rubbish. lol As to the ebrake trick, what I meant is that the guy that figured it out in detail and hooked up a switch said AWD reengages if you brake hard, and sometimes even randomly after a certain period of time. My point was thus only that it seems it might throw off your results. Cliff notes: Ignore the bit about FWD tuning, IDK anything about it. Do you think you'll get consistently accurate results with the ebrake pulled to disengage the rear diff if, from what I've read, the car may reengage it without you wanting it to? __________________ '06 Black Cherry Mica Speed6 Since 2-26-07 \| 0-60: 3.87s \| CPE CAI, SU MM, SU Boost and Recirc Tubes, Synapse BPV, Magnaflow 2.5" CBE, MDS DashHawk, TWM SS Stage 1 w/Bushings, TT Front MM, TT Rear Diff Mount, SU StiffDiff, Whiteline RSB, CX-7 Antenna, BC Coilovers, mrlilguy CDFP, CPE Catted DP, HKS Twin Power Ignition System, RAYS Gram Lights 57 Maximum Time Attack, CPE TIP, Denso 2Step Colder Spark Plugs, COBB Shifter Weight, SPC Ball Joints, VTCS, BS, & EGR Delete, VentPod w/VEI Boost Guage, Saikou Michi CC, Labonte ISG-S3, GT2871r, DNP manifold, Tial 44mm EWG, Cobb AP, TT Liquid to Air Intercooler. Spare GT2871r for sale.

01-22-2009, 05:15 PM	#10 (permalink)
MS6 P.C. Rally Racer Join Date: Apr 2006 Location: Sunny Florida Posts: 1,287 Thanks: 0 Thanked 0 Times in 0 Posts Groans: 0 Groaned at 0 Times in 0 Posts iTrader: 0 reviews	PM freekwonder(sp?), He is the one that dynoed on 2wd dyno. Give us details or unless he wants to add anything __________________ gone.