Good Recipe for 300hp/350tq?
Posted: July 22nd, 2021, 10:17 am
Newb here.
I have a freshly built 05' block that just came back from the machine shop. Application will be in a 05 TJ. Recipe for the build is as follows:
Scat 9-4.2L-3895 lightweight crank
Icon dish pistons IC668-040. 3.915" bore, 3.895" stroke
Scat 2-40L-6125 forged rods 6.125"
Hastings Piston Rings 2M660040
Cam specs @ 050 Duration: 200 intake/ 208 exhaust, 128 lobe separation
Edelbrock performer aluminum cylinder head
Harland Sharp 1.6's
Port-matched 05 intake with 62mm T.B.
CR was calculated at 8.9:1
I'm by no means an engine building guru but the motor was previously used as a boosted 4.0L with the mild cam spec'd above. Original owner gave up on it from tuning troubles and I "acquired" with the intent to take over the project as a "boosted" & "stroked" 4.7L. Well, my desires have changed to scrap the supercharger (magnum powers) and run the motor naturally aspirated. My biggest concern is the the combination of pistons, rings and Cam were selected/used for forced induction which may (or may not) "choke the motor" from possible performance gains without the blower. Easier to swap in more viable parts with the motor on a stand vs. in the vehicle. 2nd question is what is a good injector for my application? Should the motor above still make 300/350 hp/tq? Thank you!
I have a freshly built 05' block that just came back from the machine shop. Application will be in a 05 TJ. Recipe for the build is as follows:
Scat 9-4.2L-3895 lightweight crank
Icon dish pistons IC668-040. 3.915" bore, 3.895" stroke
Scat 2-40L-6125 forged rods 6.125"
Hastings Piston Rings 2M660040
Cam specs @ 050 Duration: 200 intake/ 208 exhaust, 128 lobe separation
Edelbrock performer aluminum cylinder head
Harland Sharp 1.6's
Port-matched 05 intake with 62mm T.B.
CR was calculated at 8.9:1
I'm by no means an engine building guru but the motor was previously used as a boosted 4.0L with the mild cam spec'd above. Original owner gave up on it from tuning troubles and I "acquired" with the intent to take over the project as a "boosted" & "stroked" 4.7L. Well, my desires have changed to scrap the supercharger (magnum powers) and run the motor naturally aspirated. My biggest concern is the the combination of pistons, rings and Cam were selected/used for forced induction which may (or may not) "choke the motor" from possible performance gains without the blower. Easier to swap in more viable parts with the motor on a stand vs. in the vehicle. 2nd question is what is a good injector for my application? Should the motor above still make 300/350 hp/tq? Thank you!