CJM Fuel Starvation Control Product, Round 2

phunk

I have some ideas that might make the conversion a lot more simple. I think I can do it with the VHR timing covers and VHR ECU, making it essentially just a headswap with no added complication. I should know by summer hopefully.

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G37Sam

But isn't the whole point of the head swap is to run aggressive cams and a standalone ECU since UpRev has limitations?

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phunk

For me, the point is to eliminate the mechanics of the VVEL system. The camshafts and the ECU are up to each user to choose based on their needs from there.

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1slow370

considering the factory vvel is set at .460 or so max lift they better be some BIG hr cams, only advantage would be reliability at higher rpm. You would lose a lot of the drive ability of the car for this so again not for a street car. Also you can run HR cams in VHR heads with minimal work so why even swap the heads?

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Megan370z

VVEL from JWT research the stock maximum position is around 280 degrees of duration and 0.450 lift, about what an aggressive street cam would be.

Again I do not recommend anyone doing this HR head swap for a street car .. but only for a true track car that needs 375whp+



where did you see about the capability of running the HR cams in the VHR heads ? link ?
edit: how will you install those cam sensor on each of these , 4 in total... the vhr valve cover aren't the same....
also if you don't swap the HR head and the timing cover .. you wont have VTC on the exhaust ... kind of not optimized

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Megan Journal *Click Me* ....................One Man Team Motorsport *Click Me*

phunk

Why do you guys say this is not for a street car? 375whp is great for all-motor and all, but I am perfectly cool with 700-800rwhp street cars!

The advantage of reliability at higher RPM is precisely the goal. If not for that goal, there would be absolutely no sense in removing the VVEL heads. The drive-ability of a HR without VVEL isn't so poor that you should say its no good for a street car, lol! Its still much better than most import cars. VQ's have rather decent torque due to the VVT system. The lift is the only thing that would be gone.

HR cams should not be put in a VHR motor. Obviously the intake cams could never go in since the VHR does not have anywhere to place them. The VHR exhaust cams are offset from the valve centerlines and require a special profile because of it. (According to Jim Wolf, I have not measured it myself). Therefore HR cams shouldn't be installed to a VHR even if they did fit.

I would not use the VTC on exhaust for HR head swap. The exhaust VTC is the main complexity of the HR swap, and to not bring it with would make life much cleaner and easier.

Exhaust VTC is all about emissions, and does little to no good for power and torque.

Here is the phunk's style of HR head swap. VHR timing covers. VHR exhaust cam gears. VHR intake "cam" gears with trigger. VHR timing covers. HR cam sensor positions in the valvecovers plugged. Stock 370z harness and ECU. This is my plan and how I will be attempting it. No guarantees it all fits or works, or what the VHR computer will do when the VVEL solenoids are gone. But I will let you all know! I am pretty confident that this is going to be the winning formula for me based on what I have compared and looked at. Of course, I can just machine custom parts if needed somewhere. EDIT: forgot to mention. Let me also say that another big perk of ditching the exhaust VTC is that I should still be able to run VHR style pistons. That is a big one right there. I have to confirm valve placement but I say its most likely to work.

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Megan370z

something that I want to specify, the HR head swap that im talking about is to have those big *** cam for the max power...

So this is why I wouldn't recommend this for a street car ..
not because you can drive a 800whp car which is F/I and not N/A, your idle with those big cams and overlap you will need about 1500rpm idle at minimum ,,, good luck in your stop and go traffic. your clutch will take a beating on this alone.... thats my opinion anyway who care , right ?

next, according to the research of a friend and a certain company , you will want the VTC on the exhaust . just saying... will see how much power you make at the end and more importantly how your power curve will be.

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Megan Journal *Click Me* ....................One Man Team Motorsport *Click Me*

phunk

Ah yes I will not need the large camshafts. I will probably even run the stock HR camshafts. They should be more than fine for 700+ when boosted.

Trust me, I do not want the VTC on exhaust. It will cost me TONS of time and money and it will not help my powerband much at all. Exhaust VTC is all about emissions.

Keep in mind that VQ DE's and VR38DETT from GTR do not use exhaust cam phasing.

The potential perks of stock ECU and VHR style pistons is well worth it.

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Megan370z

ok now I understand what you actually plan

we weren't exactly talking about the same goal....

anyway im not debating on the use of vtc with your setup , which isnt a problem,,, but i would strongly suggest those who would ever wish to go with the HR head for those big cams ,,, the exhaust VTC should be used.

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Megan Journal *Click Me* ....................One Man Team Motorsport *Click Me*

phunk

BACK TO PROPER TOPIC FOR THOSE LOOKING FOR UPDATES: (I will start new threads this winter about the intake manifold, oil pump, and HR conversion products that are being developed along side my engine build).

Spoke with my anodizer this morning. All the parts are hanging on the racks ready for dipping!

The only hold up is he is waiting for more blue dye to make my dark blue. While the RRPs this batch are going to be black, I have several other parts there for blue. He says the dye will be there today or tomorrow!! I am hoping to pick up the parts tomorrow, otherwise I will swing out there Monday!

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Ron

black? I wanted hot pink.. no deal Charles!

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2011 Twin Turbo PW nismo #113 - My Journal - My TT Build Thread
[ GTM GTX Stg2 TT || HKS EVC6 || Custom CarPC || F.I 3'' TDX CBE || SB 6puck clutch/ZSpeed CSC || BC BR Coilovers || SPC camber arms || Work VSS-X || Custom Headlights || PW:JDM CF Covers || Seibon CF Engine Cover ]

phunk

careful what you wish for.....

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Ron

oh God.. haha

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2011 Twin Turbo PW nismo #113 - My Journal - My TT Build Thread
[ GTM GTX Stg2 TT || HKS EVC6 || Custom CarPC || F.I 3'' TDX CBE || SB 6puck clutch/ZSpeed CSC || BC BR Coilovers || SPC camber arms || Work VSS-X || Custom Headlights || PW:JDM CF Covers || Seibon CF Engine Cover ]

Rusty

Knowing phunk, he will do it just for sh!ts and giggles. LMAO

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martin82

if u do pink, I want a clear cover, bling!