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younggun2.0 said

I kinda wanna keep spring pressure on the less crazy side. It’s a street car mostly. The trick flow 270’s are CNC ported to max wedge from factory I’ll run titanium intake valves, retainers Jessel rockers. Intake will be max wedge tunnel ram with twin 4500’s

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You will need a 2.25 or 2.30 intake to make that power and it going to take some RPM. The spring pressure is what is is. You will be able to go on the light side psi wise with a Ti intake. Any Indy -1(+.100 BBC) 2.250x5.344" Ti valve weighs 92g vs 142g for the steel version. Ti retainers are about 2/3 the weight of TensileMax or Tool Steel and the locks end up being about the same. You might also consider the requirement for lash caps which will add weight. You can run the ultra trick Manley loc-cap that uses a bead groove to retain the lash cap in the valve lock. Otherwise add a little to the 92g above for a steel tip.

You will also have to run coated valves to avoid changing valve seats.

I would think you will need over .800 lift and, as stated above, 280+ ( or is that ++) to get there at 11ish to 1. You will likely have to run a reverse dome piston to keep the CR down.

I still think close to or 900 is doable if you worked over the heads and spin it 7500ish.

As said above for the 850+ hp range -13's or B1 os where people are going.


A little nitrous and you have a 1000hp street car no problem. Plenty of power for a 10.5 tire streeter.