We'll take them to 7-7.2k with good upgraded valvetrain components. The stock oil pumps start to cavitate a little at those rpms. Since we're pushing the reliable limits of the stock bottom end, I don't spin them any higher on these setups.
Hey Matt, with the 85mm upper pulley and port injection plates. Did you have to change belt size than what came with the magnuson 2650 and 90mm pulley? If you did, which belt was the new one. Im in the process of doing the same thing and needing input on belt size
Awesome! Hey Matt, I have a stock c7 z with Maggie 2650 90mm making about 650whp on stock fueling. This care spends most of its time on the racetrack where I beat the crap out of it. I really love the 2650 and I am thinking about doing port injection from HPSI and I am still debating if I should do CAM to let it breathe. For race track I don't see benefit going over 700-750whp. I got a feeling with CAM I might easily exceed that. What are your thoughts?
A cam with better valvetrain components can work really well for road racing. Even with a 2650. We use a 110mm upper pulley with a 8.25" lower to get around 7psi. With an aux low side pump and stock lt4 injectors we see low 700's rwhp on e70 fuel. This is also paired with a 5" cold air and 103mm throttle body. The low boost and large intercooling on the 2650 keeps the Iat's low. Coolant and oil temps still run near our comfortable limit. 280 oil and 230 coolant. You should consider cooling system upgrades also.
How would Port Injection do on a car without doing heads/cam? With the release of the toohighpsi setup I was thinking of just throwing it on a ported lt4 blower and running full e85. Curious to hear your thoughts. Keep up the great content!
