Looks great.

I realize you have specific HP goals, but that looks like cams/squaretop and you'd have a ~185-190whp BP.

 

Just to verify, this is with stock cams?

 

According to his post, yes.

 

stock cams. Yes.
We did detune it to make around 155whp. However I dont want to make that graph public. But it is Good! haha
ofcourse i did save that tune incase i want to run a different class one day

 

Was this on pump gas?
200whp with squaretop, E85 and cams doesn't sound that unrealistic!

 

No doubt about it, that is impressive. Curse my locale and its lack of E85

 

Doable but we find even an optimized STB manifold starts to choke flow. Needs silly huge .500 lift, 300* cams have zip below 5000. We went to ITB's to break the barrier using csms that have more midrange.

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.

 

This was with e85.
And I'm sure if we would have kept working on this tune we could have caried that power longer but that wasn't the goal.
Activating the Vic's would have made a huge difference alone I'm sure

 

I made the same torque on pump gas using a VVT head.

 

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.

 

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.

 

Whoa. $5100 cylinder head.

"Pay to play" and all that...

 

 

Time = money.
This is true in the machine shop and on the race track.

 

Any restriction to flow on the cylinder side off the oversize intake valves?

 

No. It doesn't work that way.

 

A few psi want in. A compression test (with no spark or combustion) can be 200+ on BP's. Point is, a lot more wants out than in.

 

I think he means, does the bore size of the engine start to limit the additional flow from going bigger with the valves because the open valve will be so close to the edge of the combo chamber.

 

Our CNC head includes a deshrouded chamber. The best flowing BP head I have ever heard of is our +2.

 

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...