Because CNC
03-14-2014, 12:10 PM
#187
As with most of these builds, they are aimed specifically at a racing class. Given the 5 speed ratios and a 4.77 diff, you want a specific power level 4500-8000. Stock cams achieve that.
We have yet to test or see data for any cam that makes as much low and midrange corner exit N/A torque without huge steps/dips than the stock BP6D cams. Im sure its possible to improve, I just havent seen it so I still recommend stock cams for builds like these. Sonnys PTD/TTD crushing NB2 engine from nationals was a blueprinted stock 1839cc 10.3:1 BP6D long block.
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03-14-2014, 01:57 PM
#190
Yup, the BP6D just makes more torques. My CA91 best is 145lbs @ 4250rpm with 10.4:1 85.5's, ~130whp from 4600-8300 (capped). That's the one that got killed by the broken TB shaft at Sonoma last year :(
I think Eric didn't want to mess with VVT. He asked whether he could hit his targets with a 4W on E85 and I thought he could.
To be fair E85 doesn't seem to make much more torque over pump below torque peak. I notice most of the gains are past the torque peak, assuming you reach MBT on CA91. That magic is running a bunch more compression than you can with pump gas.
I think Eric didn't want to mess with VVT. He asked whether he could hit his targets with a 4W on E85 and I thought he could.
To be fair E85 doesn't seem to make much more torque over pump below torque peak. I notice most of the gains are past the torque peak, assuming you reach MBT on CA91. That magic is running a bunch more compression than you can with pump gas.
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10-02-2014, 06:50 PM
#191
A few updates:
We are now offering Tomei cams as an option in our CNC heads. They are short duration and can be made to idle like stock with a little tuning finesse. We just started playing with these cams but we're seeing roughly 10% power gains for any given build. Check every option including cams on a BP6D have and you have exactly whats in deviate right now. We're getting so much flow from the +2mm O/S CNC head that it's about 2psi lower boost but another 20whp than we would see with a stock head.
Cam specs on the website.
We are now offering Tomei cams as an option in our CNC heads. They are short duration and can be made to idle like stock with a little tuning finesse. We just started playing with these cams but we're seeing roughly 10% power gains for any given build. Check every option including cams on a BP6D have and you have exactly whats in deviate right now. We're getting so much flow from the +2mm O/S CNC head that it's about 2psi lower boost but another 20whp than we would see with a stock head.
Cam specs on the website.
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10-06-2014, 01:39 PM
#200
I am already eyeing this for the race car. I did port the head; the amount it was ported I am sure there is some inconsistencies between the ports, and the valves and all that are stock. Originally wasn't planning to go over 7,000 but why not if I can. The cams you guys have are probably not boost-friendly? Would you still recommend +2 for turbo too? It's odd as talking to a few boosted local gurus (drag racing, 5,000+ HP) they keep the exhaust valve small for velocity reason... What are your thoughts on that?
Additionally what sort of a cost increase for ceramic coating? How has been the longevity of the coating? We have had some uber-failures on rotaries with the ceramic coating on the rotors...
Additionally what sort of a cost increase for ceramic coating? How has been the longevity of the coating? We have had some uber-failures on rotaries with the ceramic coating on the rotors...
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