Wassup Guy's:

I want to purchase some cams but I don't know what is the benefit of them installed alone. My G35 is FI with a Vortech V3 SC. So would my car benefit from CAMS installation alone>?

 

here's the cam you need

 

Yes, your car would benefit greatly from cams since your supercharged. Most people seem to like jwt cams.

 

Yes, cams and headers will benefit you.

 

I'll just respond here instead of through PMs.

First thing to consider, the Vortech blower produces power in a very linear fashion. They tend to keep gaining power as RPMs increase. The downside is they don't offer a wallop of torque across the powerband like a turbo or roots-type blower. The advantage to centrifugals blowers is they offer a powerband that doesn't sneak up on unexpectedly. In that aspect, they're great for road racing.

So, my main question is what kind of driving do you do and where do you like the power? If you're looking 1/4 mile performance, then cams aren't going to be a very cost effective mod. By nature, the cams will increase power in the upper rpms at the expense of some low and some midrange. Off the line, the car will feel a bit weaker or boggier.

Cams will allow the VQ to breath at much higher rpms (up to around 7600rpms) so you'll need to take the necessary safeguards to keep the VQ alive in the upper rpms. The OEM heads will flow more than enough power so they're not a bottle neck. What you'll need to do add a Revup higher flowing oil pump as well as stiffer valve springs to reduce valve float (OEM springs float at ~7200rpms). You'll also need to consider a better breathing intake manifold because OEM unit does become a bottleneck after 7200rpms or so. My recommendation is the Cosworth manifold.

Since you'll be increasing operational rpm, every gear will be longer which isn't ideal because you want to get into the meat of the powerband as soon as possible. In order to do this, you need more torque multiplication. That comes from a deeper rear gearset and higher stall torque converter if a 5AT.

Just adding cams to a stock geared car could potentially result in a slower car in the 1/4 mile because the powerbands are elevated and lowend power is reduced. Having a slower car from 0-40 is extremely detrimental to 1/4 mile performance. Doing everything the right way is very costly. $2500+ for cams installed, $300+ for valve springs, $400+ Revup oil pump installed, rear gears $300-$500, $1500 Cosworth intake manifold, and $2000 for a high stall torque converter (if 5AT).

If this were my car, I'd do the following in this order:

1) Revup oil pump
2) Gears (3.69 if 5AT, 3.91 if 6MT)
3) Intake manifold
4) High stall TC if 5AT
5) Cams and springs

IMO, cams are the last mod to consider. The cost benefit just really isn't there. Plus, they will make the car a bit more docile around time. For me, I'd rather have a more responsive car from 0-80mph rather than a car that really hauls from 70 to 120+.

 

Cams will benefit you like the BC stage 2.

I run a V2 Vortech with 2.87 pulley, full built low compression motor and BC stage 3 cams and noticed very little power loss below 2200 RPM.

Having a taller gear actually loads the supercharger quicker.

You need to stick with a med. cam like BC stage 2 to avoid all the other mods if your staying below 7200 RPM especially on a stock bottom end.

Improving intake/exhaust flow is a must with bigger cams and FI to get full benefit.

Remember the more Air/Fuel you can pack into a cylinder efficiently = more power