Will bigger cams make turbo spool faster

#Will bigger cams make turbo spool faster install#
#Will bigger cams make turbo spool faster upgrade#

The owner has the same goal of 650hp, but chooses to go with a larger turbo like a Garrett GTX40/88r or 6766 or Borg Warner S366. Now letвЂ™s do the same scenario with a large turbo. Also they think to themselves that if they wanted to wait till 5000 RPM to get into the go peddle they would have just bought a larger turbo. They now back out of the peddle so the torque drops and traction can be found right around 5000 rpm where they are able to get back into the go peddle but are then unsatisfied as they can feel the engine torque falling off as the small turboвЂ™s turbine wheel is too much of a restriction at high engine RPM. 1st gear the owner stabs the throttle and the turbo lights right up and so does the tires, so they shift to 2nd but the torque comes on so rapidly with the little turbo and so low in the rpm band that again the tires light right up again. Well the owner empties his wallet and hits the street. To fix this we need to be grabbing for our wallet once again and have the motor fully built with forged parts. How exciting, but then our engine builder told us that making that much torque will most likely bend our stock rods and beat on our bearings a lot more. A bonus though of running such high boost and hitting high boost low in the RPM band was we made tons of torque too. Now this power can only be had if the owner is willing to grab his wallet for $9 dollar a gallon race gas in the tank. We eventually do meet our goal of 650whp but we had to run such high boost pressure to reach that goal, that race gas was required. We go to the dyno and continue turning up the boost pressure till we hit our 650 HP goal. Strong choices would be a Garrett GT35R or GTX35R, or a Precision 6262, or a Borg Warner S362.

If we say our goal is say 650 wheel horsepower, then we would be looking for a turbo that can flow upwards of 60 lbs/min of air. Since we need a specific example to talk about letвЂ™s go with a mid size turbo and a mid size motor like a 3.0 Liter Toyota Supra motor (2jz). Now that we have talked a little about the proвЂ™s and conвЂ™s of each letвЂ™s talk about why picking the smallest turbo for our power goals isnвЂ™t necessarily the end all advice to turbocharger sizing.

#Will bigger cams make turbo spool faster install#

Physically larger, therefor can be harder to install in a given space.Meaning the time till the second boosted torque curve over the N/A torque curve takes time to obtain. More progressive torque curve that comes online in a more progressive manor.Large turbine wheels allow good flow for better volumetric efficiency and less exhaust gas reversion, which helps in avoiding cylinder detonation and pre-ignition.Usually maintain torque all the way to redline.Torque usually comes on rapidly over a small rpm band causing traction problems.DonвЂ™t make as much power as larger turbochargers.Smaller turbine wheels cause more exhaust manifold pressure (EMAP) causing more cylinder reversion of exhaust gasses, raising cylinder temperatures causing the motor to become more prone to detonation and pre-ignition.Torque falls in the upper RPM of the power band.Easier install due to smaller dimensions.

Spool faster providing more torque lower in the power band.

While 90% of the internet would tell you to pick the smallest turbocharger that meets your horsepower goals I would like to offer a different point of view after we go over the proвЂ™s and conвЂ™s of each. It would be nice if turbocharging was like many other decisions where bigger is better, but not so.

#Will bigger cams make turbo spool faster upgrade#

So you have decided to turbocharge your car or upgrade your existing turbo, but are stuck on what size of turbo would be right for you. Does a large turbo car make a terrible streetcar? Things to consider when picking and deciding on a turbo size for your build.