MRL Performance
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- Joined
- Apr 20, 2012
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Ok, so i here it all the time, "340's just dont make good torque". Well thats true, sorta. We got a call from a guy. He wanted a streetable 340, but wanted some grunt and didnt want to go with a stroker.
We talked about this and that, he had some parts to work with. Some good some not so good.
We made the heads a little better, RPM's, looked like they were decked with a belt sander. Valve job was not good at all, guides way to tight, bla bla bla. We fixed all that.
He had some nice Crane rockers, had to replace a few due to rust and pitting on the roller tips, no big deal.
The block he had needed a light bore and hone to make it right. The #1 main cap was messed up, so I got one out of the "cap box" (never throw them out!), found a good one. Line bored/honed with studs and its good to go.
Went with RaceTec pistons, with custom ring pack, SUPER NICE!
Custom hydraulic roller cam. 227/231 with .530" lift
RPM AG intake, QF 750 annular carb.
So how much torque can a 340 make with pump gas 9.7 to 1 and a nice engineered package??
455TQ at 4300rpm. It made 450+TQ from 4000-5000rpm and 410+TQ from 3-6000rpm! Now for the Top End Power
470HP at 5800rpm and it carried 470HP from 5800-6000rpm, thats where we stopped the pulls.
Now this is not a stroker, its a .040" over 340.
And its a total street sleeper. Idle smooth at 850 rpm with 15 inches of vacuum
We also ran it with the New FBO ignition module up against our MSD 6al. The FBO made 3hp more and 5tq more over the MSD. This little thing kicks Ass! And yes, We are a dealer for them!!! Call US to order! Check it out here http://www.4secondsflat.com/Ignition.html
http://www.youtube.com/watch?v=My8Kv...06LGxCi-2cRmFA
http://www.youtube.com/watch?v=y7yLX...06LGxCi-2cRmFA
We talked about this and that, he had some parts to work with. Some good some not so good.
We made the heads a little better, RPM's, looked like they were decked with a belt sander. Valve job was not good at all, guides way to tight, bla bla bla. We fixed all that.
He had some nice Crane rockers, had to replace a few due to rust and pitting on the roller tips, no big deal.
The block he had needed a light bore and hone to make it right. The #1 main cap was messed up, so I got one out of the "cap box" (never throw them out!), found a good one. Line bored/honed with studs and its good to go.
Went with RaceTec pistons, with custom ring pack, SUPER NICE!
Custom hydraulic roller cam. 227/231 with .530" lift
RPM AG intake, QF 750 annular carb.
So how much torque can a 340 make with pump gas 9.7 to 1 and a nice engineered package??
455TQ at 4300rpm. It made 450+TQ from 4000-5000rpm and 410+TQ from 3-6000rpm! Now for the Top End Power
470HP at 5800rpm and it carried 470HP from 5800-6000rpm, thats where we stopped the pulls.
Now this is not a stroker, its a .040" over 340.
And its a total street sleeper. Idle smooth at 850 rpm with 15 inches of vacuum
We also ran it with the New FBO ignition module up against our MSD 6al. The FBO made 3hp more and 5tq more over the MSD. This little thing kicks Ass! And yes, We are a dealer for them!!! Call US to order! Check it out here http://www.4secondsflat.com/Ignition.html
http://www.youtube.com/watch?v=My8Kv...06LGxCi-2cRmFA
http://www.youtube.com/watch?v=y7yLX...06LGxCi-2cRmFA
