MRL Performance
Well-Known Member
A lot of guys ask for a street engine with great power. And what does that mean, Street? It means different things to different people. But for the most part it means the following.............
Street engine should have
1. Pump gas
2. Fair idle for everyday driving
3. Enough vacuum for power brakes, A/C and power steering
4. No over heating issues
5. Decent FE
6. No maintenance except oil changes and air filters
7. Hydraulic cam
8. Good longevity
9. And Butt loads of power down low and up top
That's a TALL order, and I have been tweaking on this combo for a few years. Here is the King of the Street SBM. It has all of the above, and more.
The Basic combo run down
SBM 340 stroker
4.110 bore (yes sonic tested to make sure it was safe)
4.00 stroke
MRL HR cam 239-243 .550/.560 lift
MRL Procomp heads, fully ported
Comp roller rockers
RPM intake
10.7 to 1 compression
Kevko oil pan
FAST EZ 2.0 with full ignition control
93 octane pump gas from Shell
This combo has made great power in the past. But we have made a few changes and found some real power. So here is the power that this little SBM made
Torque, its really what defines a good street engine. This one has more than enough. How much, well how does 500+ from 2800-6200rpm sound??? Pretty darn good right? It made 570TQ from 4350-4850 peaking with 577TQ at 4700rpm!
Power, its fun so we can not discount that. It made 575HP from 5500-6100rpm peaking with 582HP right around 5800rpm!
Dyno pulls were made from 2800-6200 and it never dropped below 500TQ.
So there you have it, A Street SBM that has all the above characteristics that made 582HP/577TQ, with EFI reliability and drivability. Idles at 900-950 with a slight lope and pulls 13-14in vacuum. This is a Winner Winner Steak Dinner, save the chicken for the other guys LOL
Street engine should have
1. Pump gas
2. Fair idle for everyday driving
3. Enough vacuum for power brakes, A/C and power steering
4. No over heating issues
5. Decent FE
6. No maintenance except oil changes and air filters
7. Hydraulic cam
8. Good longevity
9. And Butt loads of power down low and up top
That's a TALL order, and I have been tweaking on this combo for a few years. Here is the King of the Street SBM. It has all of the above, and more.
The Basic combo run down
SBM 340 stroker
4.110 bore (yes sonic tested to make sure it was safe)
4.00 stroke
MRL HR cam 239-243 .550/.560 lift
MRL Procomp heads, fully ported
Comp roller rockers
RPM intake
10.7 to 1 compression
Kevko oil pan
FAST EZ 2.0 with full ignition control
93 octane pump gas from Shell
This combo has made great power in the past. But we have made a few changes and found some real power. So here is the power that this little SBM made
Torque, its really what defines a good street engine. This one has more than enough. How much, well how does 500+ from 2800-6200rpm sound??? Pretty darn good right? It made 570TQ from 4350-4850 peaking with 577TQ at 4700rpm!
Power, its fun so we can not discount that. It made 575HP from 5500-6100rpm peaking with 582HP right around 5800rpm!
Dyno pulls were made from 2800-6200 and it never dropped below 500TQ.
So there you have it, A Street SBM that has all the above characteristics that made 582HP/577TQ, with EFI reliability and drivability. Idles at 900-950 with a slight lope and pulls 13-14in vacuum. This is a Winner Winner Steak Dinner, save the chicken for the other guys LOL