hrk:s 2013 build
Well,
I guess I spent my time building the engine instead of updating this thread.
Some highlights:
Engine ran well 332 hp 325 tq with now sold Garret 2560 turbo.
Dyno thread
https://www.miataturbo.net/megasquir...s3x-%3D-73409/
June Dragon Hillclimb
https://www.miataturbo.net/local-mee...llclimb-73330/
August Dragon Hillclimb
https://www.miataturbo.net/local-mee...g-3-4-a-73705/
Barber Time Trial event
https://www.miataturbo.net/local-mee...weekend-74674/
Hillclimbs I got overall 1st on both times, at Barber won the class and was fastest in the rungroup but I lost to formulas and CSR. Downforce and smooth course helps them.
I broke 5-speed transmission again, this one had < 60 minutes lifetime in the car. Still have couple spares and one working one back in the car so it is all good for now, and excuse for more power...
Upgrading turbo to 6758 EFR and downpipe and exhaust to 4".
Would there be any recommendations on reasonably lightweight muffler with 4" inlet and outlet, quiet sound and minimal backpressure?
I did like my previous Raptor for sound, if that gives an idea of noise.
Thanks
I guess I spent my time building the engine instead of updating this thread.
Some highlights:
Engine ran well 332 hp 325 tq with now sold Garret 2560 turbo.
Dyno thread
https://www.miataturbo.net/megasquir...s3x-%3D-73409/
June Dragon Hillclimb
https://www.miataturbo.net/local-mee...llclimb-73330/
August Dragon Hillclimb
https://www.miataturbo.net/local-mee...g-3-4-a-73705/
Barber Time Trial event
https://www.miataturbo.net/local-mee...weekend-74674/
Hillclimbs I got overall 1st on both times, at Barber won the class and was fastest in the rungroup but I lost to formulas and CSR. Downforce and smooth course helps them.
I broke 5-speed transmission again, this one had < 60 minutes lifetime in the car. Still have couple spares and one working one back in the car so it is all good for now, and excuse for more power...
Upgrading turbo to 6758 EFR and downpipe and exhaust to 4".
Would there be any recommendations on reasonably lightweight muffler with 4" inlet and outlet, quiet sound and minimal backpressure?
I did like my previous Raptor for sound, if that gives an idea of noise.
Thanks
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iTrader: (6)
Joined: Oct 2005
Posts: 335
Total Cats: 3
From: Atlanta GA
Yes I have one for testing, and learned that their selection is a bit tall for stock cams. If you reduce the base circle in cams by 0.040", the lifter needed would fall to midway of Ford lifter selection, giving plenty of selection to each direction for individual seat/valve/cam variance.
This is based on having +1 supertech valves, rebuild head and stock -01 cams.
I ended up getting Mazdasport shim under bucket lifters, height measured 0.6129" and 0.040" valvecaps from Manley, because I ran out of time to get new cams and Zetec lifters. The Supertech valves were individually shortened (max 0.012") to get the lash to 0.008 intake and 0.012" exhaust.
I did not feel comfortable shortening valves 0.040" or more to get the Zetec lifters work with stock cams.
Stock lifter with shim weight 47.1 grams while Zetec 32.6 grams, and the quality appears to be better than Mazda. Fitment is good if there is enough length between cam and seat for the valve to be.
Attached photos of stock lifter and Zetec in comparison.
Hope this helps.
This is based on having +1 supertech valves, rebuild head and stock -01 cams.
I ended up getting Mazdasport shim under bucket lifters, height measured 0.6129" and 0.040" valvecaps from Manley, because I ran out of time to get new cams and Zetec lifters. The Supertech valves were individually shortened (max 0.012") to get the lash to 0.008 intake and 0.012" exhaust.
I did not feel comfortable shortening valves 0.040" or more to get the Zetec lifters work with stock cams.
Stock lifter with shim weight 47.1 grams while Zetec 32.6 grams, and the quality appears to be better than Mazda. Fitment is good if there is enough length between cam and seat for the valve to be.
Attached photos of stock lifter and Zetec in comparison.
Hope this helps.
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iTrader: (6)
Joined: Oct 2005
Posts: 335
Total Cats: 3
From: Atlanta GA
Here are part numbers for
Ford Zetec 2.0l
YS4Z-6500-DAD--------SELECT-FIT 17.145MM THICK 0.6750
YS4Z-6500-EA--------SELECT-FIT 17.175MM THICK 0.6762
YS4Z-6500-EAB--------SELECT-FIT 17.205MM THICK 0.6774
YS4Z-6500-EAC--------SELECT-FIT 17.235MM THICK 0.6785
YS4Z-6500-EAD--------SELECT-FIT 17.265MM THICK 0.6797
YS4Z-6500-FA--------SELECT-FIT 17.295MM THICK 0.6809
YS4Z-6500-FAB--------SELECT-FIT 17.325MM THICK 0.6821
YS4Z-6500-FAC--------SELECT-FIT 17.355MM THICK 0.6833
YS4Z-6500-FAD--------SELECT-FIT 17.385MM THICK 0.6844
YS4Z-6500-GA--------SELECT-FIT 17.415MM THICK 0.6856
YS4Z-6500-GAB--------SELECT-FIT 17.445MM THICK 0.6868
YS4Z-6500-GAC--------SELECT-FIT 17.475MM THICK 0.6880
YS4Z-6500-GAD--------SELECT-FIT 17.505MM THICK 0.6892
YS4Z-6500-HA--------SELECT-FIT 17.535MM THICK 0.6904
YS4Z-6500-HAB--------SELECT-FIT 17.565MM THICK 0.6915
YS4Z-6500-HAC--------SELECT-FIT 17.595MM THICK 0.6927
YS4Z-6500-HAD--------SELECT-FIT 17.625MM THICK 0.6939
YS4Z-6500-JA--------SELECT-FIT 17.655MM THICK 0.6951
Ford Zetec 2.0l
YS4Z-6500-DAD--------SELECT-FIT 17.145MM THICK 0.6750
YS4Z-6500-EA--------SELECT-FIT 17.175MM THICK 0.6762
YS4Z-6500-EAB--------SELECT-FIT 17.205MM THICK 0.6774
YS4Z-6500-EAC--------SELECT-FIT 17.235MM THICK 0.6785
YS4Z-6500-EAD--------SELECT-FIT 17.265MM THICK 0.6797
YS4Z-6500-FA--------SELECT-FIT 17.295MM THICK 0.6809
YS4Z-6500-FAB--------SELECT-FIT 17.325MM THICK 0.6821
YS4Z-6500-FAC--------SELECT-FIT 17.355MM THICK 0.6833
YS4Z-6500-FAD--------SELECT-FIT 17.385MM THICK 0.6844
YS4Z-6500-GA--------SELECT-FIT 17.415MM THICK 0.6856
YS4Z-6500-GAB--------SELECT-FIT 17.445MM THICK 0.6868
YS4Z-6500-GAC--------SELECT-FIT 17.475MM THICK 0.6880
YS4Z-6500-GAD--------SELECT-FIT 17.505MM THICK 0.6892
YS4Z-6500-HA--------SELECT-FIT 17.535MM THICK 0.6904
YS4Z-6500-HAB--------SELECT-FIT 17.565MM THICK 0.6915
YS4Z-6500-HAC--------SELECT-FIT 17.595MM THICK 0.6927
YS4Z-6500-HAD--------SELECT-FIT 17.625MM THICK 0.6939
YS4Z-6500-JA--------SELECT-FIT 17.655MM THICK 0.6951
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