14.8@93.5mph speed6 - Mazda 6 Forums : Mazda 6 / Mazda Atenza Forum

buttons · 07-03-2009, 11:23 PM

So i made 3 passes at my local track. 15.0@93 14.9@92.8 and 14.8@93.5 my best 60' was 2.1, worst was the 15.0 (2.45)

To little RPM and it bogs, to much rpm and my clutch slips. I think i have a serious boost leak too, recently ive walked bolt on mustang GT's and 350z from a roll so the 93mph trap speed seems a bit off!

i have CAI, 3" downpipe back, rear motor mount, no tune. Shouldnt i trap 99-100mph?

Race weight with me and 1/4 tank of gas was 3630lbs.

DCYT · 07-03-2009, 11:26 PM

QUOTE (buttons @ Jul 3 2009, 11:23 PM)

Quote:

So i made 3 passes at my local track. 15.0@93 14.9@92.8 and 14.8@93.5 my best 60' was 2.1, worst was the 15.0 (2.45)

To little RPM and it bogs, to much rpm and my clutch slips. I think i have a serious boost leak too, recently ive walked bolt on mustang GT's and 350z from a roll so the 93mph trap speed seems a bit off!

i have CAI, 3" downpipe back, rear motor mount, no tune. Shouldnt i trap 99-100mph?

Race weight with me and 1/4 tank of gas was 3630lbs.[/b]

This seems a little slow for sure.
What RPM are you shifting at?

Maybe you got bad gas?

mazda6club6 · 07-04-2009, 12:02 AM

The low mph indicates you're down roughly 15% hp, not counting what the downpipe should have added. Sumpthin' needs fixing, a little clutch slip on slow 60s are not near enough to cause the low trap speed.
FYI, trap speed and hp/pound are about a cubic relationship: to got 2x as fast takes 8x the power in theory, more in practice.

bova80 · 07-04-2009, 12:07 AM

did you remember to turn the traction control off?

superskaterxes · 07-04-2009, 12:46 AM

dont shift past 6k, ever

buttons · 07-04-2009, 01:43 AM

QUOTE (superskaterxes @ Jul 3 2009, 09:46 PM)

Quote:

dont shift past 6k, ever[/b]

I was shifting at 5700rpms, not lifting off the gas pedal either. After leaving the track, merging on the highway felt almost non-turbo... i think there is a boost leak or something.... going to look in the morning.

according to horsepower calculator my car is making 226hp at the flywheel..honestly thats what it feels like right now too. I can feel boost, but it feels more like 6-7lbs sure wish i had some gauges or my cobb tuner still...

Yes, traction control was always off all night. i launched at 3500rpms. What kind of 60' do you guys cut on stock clutch/drivetrain? seems like 1.7 should be possible if the clutch didnt slip.

djuosnteisn · 07-04-2009, 02:15 AM

QUOTE (superskaterxes @ Jul 3 2009, 08:46 PM)

Quote:

dont shift past 6k, ever[/b]

I do now.

*snicker snicker*

In fact its hard not to bury it in the red.

buttons · 07-04-2009, 12:20 PM

QUOTE (djuosnteisn @ Jul 3 2009, 11:15 PM)

Quote:

I do now.

*snicker snicker*

In fact its hard not to bury it in the red.[/b]

Yes...i really miss my cobb AP. Just cant drop $700 for another one.

bkbmazda · 07-04-2009, 08:48 PM

what were your shift points?

need to be short shifting...5500 seems to work best.

buttons · 07-05-2009, 05:35 PM

ok, had my buddy come over. we put the speed 6 against my 95 firebird formula. its 6 speed, full exhaust, intake dyno 276whp/302tq weighs 100lbs less. from 10-80mph it only pulled about 5-6 feet. my front bumper was at the firebirds door. i havent been to the track with the firebird yet, but it should trap 101-102.....still dont understand crappy trap speed and track times....

Here is a short video of my firebird next to my mazda (not racing)
95 Firebird Formula M6

07-03-2009, 11:23 PM	#1 (permalink)
buttons Drivers License Join Date: Dec 2008 Location: Grand Rapids MI Posts: 90 Thanks: 0 Thanked 0 Times in 0 Posts Groans: 0 Groaned at 0 Times in 0 Posts iTrader: 0 reviews	So i made 3 passes at my local track. 15.0@93 14.9@92.8 and 14.8@93.5 my best 60' was 2.1, worst was the 15.0 (2.45) To little RPM and it bogs, to much rpm and my clutch slips. I think i have a serious boost leak too, recently ive walked bolt on mustang GT's and 350z from a roll so the 93mph trap speed seems a bit off! i have CAI, 3" downpipe back, rear motor mount, no tune. Shouldnt i trap 99-100mph? Race weight with me and 1/4 tank of gas was 3630lbs. __________________ 06 MazdaSpeed 6: Fujita CAI, Custom 3" Catback Magnaflow, SU MM, RPM street springs 14.8@93.48 2.21 60' slipping clutch

07-04-2009, 12:07 AM	#4 (permalink)
bova80 Mazda Guru Join Date: Mar 2007 Location: Pittsburgh, PA Posts: 3,795 Thanks: 0 Thanked 3 Times in 3 Posts Groans: 0 Groaned at 0 Times in 0 Posts iTrader: 0 reviews	did you remember to turn the traction control off? __________________ 07 Mazdaspeed6 GT MzdSpd.com

07-04-2009, 12:46 AM	#5 (permalink)
superskaterxes Mazda Guru Join Date: Mar 2007 Location: Central Jersey Posts: 3,355 Thanks: 3 Thanked 6 Times in 5 Posts Groans: 0 Groaned at 0 Times in 0 Posts iTrader: 0 reviews	dont shift past 6k, ever __________________ 2006 Mazdaspeed 6 GT Black Mica #4126 GT3076R BITCHES ~ TXS BOV ~ Custom 3" MAF SRI w/ giant AEM filter ~ AP PROtune'd ~ MBC ~ Custom Side-to-Side FMIC w/Treadstone TR8 Core ~ CPE DP ~ DNP Mani w/Tial 38mm MV-S EWG VTA'd~ CPE BT TIP ~ TWM Stage 1 Short Shifter ~ CPE RMM ~ TTFMM ~ CPE RDM ~ BC CO's slammed ~ SPC BJ's ~ EBC Red's ~ Stoptech's ~ Technafit SS Lines ~ Autometer Boost & STRI EGT in Custom Built Vent Pod ~ 20% Tint ~ LED Tails ~ Denso ITV-24's ~ Xtra Shorty Antenna ~ Dashhawk ~ CPE Dual CBE ~ Custom Strut tower bar ~ Whiteline RSB ~ PnP'd IM ~ CDFP Internals ~ labonte meth kit ~ VC tapped OCC ~ 320WHP/385WTQ ~ 12.9 @ 107 1.8 60' ~ fastest stock turbo trap speed in the USA

07-04-2009, 08:48 PM	#9 (permalink)
bkbmazda Track Racer Join Date: Aug 2008 Location: San Diego Ca. Posts: 178 Thanks: 0 Thanked 0 Times in 0 Posts Groans: 0 Groaned at 0 Times in 0 Posts iTrader: 0 reviews	what were your shift points? need to be short shifting...5500 seems to work best. __________________ 2007 MS6 GT & 2007 6 GT WAGON "mazda won me over with their 6 so much I bought 2 of em"

07-05-2009, 05:35 PM	#10 (permalink)
buttons Drivers License Join Date: Dec 2008 Location: Grand Rapids MI Posts: 90 Thanks: 0 Thanked 0 Times in 0 Posts Groans: 0 Groaned at 0 Times in 0 Posts iTrader: 0 reviews	ok, had my buddy come over. we put the speed 6 against my 95 firebird formula. its 6 speed, full exhaust, intake dyno 276whp/302tq weighs 100lbs less. from 10-80mph it only pulled about 5-6 feet. my front bumper was at the firebirds door. i havent been to the track with the firebird yet, but it should trap 101-102.....still dont understand crappy trap speed and track times.... Here is a short video of my firebird next to my mazda (not racing) 95 Firebird Formula M6 __________________ 06 MazdaSpeed 6: Fujita CAI, Custom 3" Catback Magnaflow, SU MM, RPM street springs 14.8@93.48 2.21 60' slipping clutch

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07-04-2009, 12:02 AM	#3 (permalink)
mazda6club6 Track Racer Join Date: Oct 2006 Posts: 782 Thanks: 0 Thanked 0 Times in 0 Posts Groans: 0 Groaned at 0 Times in 0 Posts iTrader: 0 reviews	The low mph indicates you're down roughly 15% hp, not counting what the downpipe should have added. Sumpthin' needs fixing, a little clutch slip on slow 60s are not near enough to cause the low trap speed. FYI, trap speed and hp/pound are about a cubic relationship: to got 2x as fast takes 8x the power in theory, more in practice.