VVT or No?
 

Hey guys. I'm currently rebuilding my engine, also putting in forged Wiseco pistons and Manley h-beam rods along with ACL bearings, head and main studs, etc. in preparation for my future turbo setup. As for the cylinder head in this rebuild, I'm just going to buy a remanufactured head from Heads Only. My plan is to put heavier springs, cams, and SUB lifters. Power goal around 500-600hp. I will leave the head stock for now until I actually put the turbo in.

Since I'm buying the cylinder head ready to go (I send mine in after I get the new one, no core charge up front), I can choose the BP4W head or BP6D head. I am using an MS3-Pro, was told I could just leave the connector undone if I go for the BP4W head. Reason being is I plan on putting cams in anyway, and I don't think there even are bigger cams for VVT heads? Unless I'm mistaken, but even then I'm sure they are a lot more expensive compared to 4W cams. That and I don't really like VVT, all the potential problems it can cause (and has caused) for the little hp it makes... no thanks.

Question is, are there VVT cams available? I am searching for 264-272 duration and higher lift. I plan on buying a 6266 so I will need as much flow as I can make; at this power level I'm pretty sure I can't get far enough on stock cams.

(ZF 5-speed w/ ACT HD E46 clutch and Getrag 3.42 before someone asks)

When I talked to them the return had to be same model as what was bought. In other words, you can’t order a VVT head and send back a 94-97 head as a core.

Also, they’re not showing any 99-00 BP4 heads only 1.6, early 1.8 and later 1.8 (VVT).

If you have the ECU why not opt for the VVT and gain the mid-range torque?

Will Fab9's forced induction cams work on the BP6D?

https://fab9tuning.com/fab9-forced-i...-1-8l-engines/

I haven't given much thought to VVT. At 30lbs of boost and longer duration I figured VVT is not worth the headache at that point.. But if I can't get a non-VVT head as it turns out, guess I have no choice lol

I'm really hoping those cams work, I haven't had much success finding 1.8 VVT cams anywhere else.

Edit: I'm dumb... It's an exchange service so of course it will work lol

If hooking up two wires for vvt is a massive headache, then how do you live? Lol.

You can find VVT cams. Tomei, Maruha, CatCams (and I am sure also others) offer them. They are quite more expensive though. Also; I am quite sure I saw a BP4W head for sale somewhere in here yesterday or today.

Well first off I've seen some pictures of Fab9's cams and they look like hot garbage in terms of quality. I would avoid those at all costs. Tomei does make an intake cam for the BP6D, and then you can use any NB compatible cams for the exhaust. But it's not as big as you're looking for.

.425" lobe, 252° seat duration, .008" cold lash, 33mm base circle

Second, not sure how much "mid range torque" there is to be had with a 600WHP turbo application. It might help spool just a tiny bit but if this is a drag application it'll be useless since you're already going to be using launch control and anti lag strategies to leave the line making power already.

For something that is going to be all top end and pretty much undrivable on the street anyways I'd probably lean towards the BP4W with cheaper and better cams.

Here you go.... BP4W head for sale

This pretty much sums it up:

The headache I'm talking about isn't two wires, its the leaky high pressure feed, solenoid that commonly fails or gets stuck, plastic filter that gets brittle and cracks over time, etc. How about all the people that have problems with the VVT system simply because of the oil weight they use?

Like he said (and he is right) this is a drag application. This car is going to be a specialty drag car, I will street it from time to time but it's main purpose is running 9s or 10s down the 1/4. There is no point in keeping the VVT when it adds nothing to the 600whp the car is going to make.

Wonder if I can buy just the head... I'll be changing out the intake manifold and fueling anyways lol