Supporting an increased Rev Limiter 8500-9000
Aug 22, 2012, 10:25 PM
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Supporting an increased Rev Limiter 8500-9000
Apart from the obvious valvetrain modifications. What does the 4b11t need to be able to support revs of around 8500-9000. Does it need modification to the oiling system to keep everything lubricated up top?
Aug 24, 2012, 06:22 AM
#3
And aside from upgraded rods too right? 
I have a built 2.0 (MAP) kelford cams and supertech valves & dual valvesprings and the car revs to 8500 just fine, 9000 probably fine too. If 9000 is indeed your limit, I'd recommend just a basic set of beehive valvesprings. Little less noisy than duals and will do just fine to that rpm limit.
One item of note, not sure if its ever discussed...there is a small plastic oil filter/screen that is cone shaped, it sits depressed in the block but is either the oil feed or return from the head....I put mine back in place when I had the motor apart but I considered leaving it off. 18,500 miles and lots of revs, no issues thus far (knock on wood).
I have a built 2.0 (MAP) kelford cams and supertech valves & dual valvesprings and the car revs to 8500 just fine, 9000 probably fine too. If 9000 is indeed your limit, I'd recommend just a basic set of beehive valvesprings. Little less noisy than duals and will do just fine to that rpm limit.
One item of note, not sure if its ever discussed...there is a small plastic oil filter/screen that is cone shaped, it sits depressed in the block but is either the oil feed or return from the head....I put mine back in place when I had the motor apart but I considered leaving it off. 18,500 miles and lots of revs, no issues thus far (knock on wood).
Aug 24, 2012, 08:20 AM
#4
Agree with Scheides. I have a 2.2L with supertech springs/retainers, supertech +1mm valves and GSC s2 cams and I rev to 9k plenty.
Obviously new rods and rod bolts, aka a built motor and valvetrain is needed. Then its no biggie for a car that is properly tuned.
Obviously new rods and rod bolts, aka a built motor and valvetrain is needed. Then its no biggie for a car that is properly tuned.
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Aug 24, 2012, 01:39 PM
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Aug 25, 2012, 07:45 AM
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And aside from upgraded rods too right?
I have a built 2.0 (MAP) kelford cams and supertech valves & dual valvesprings and the car revs to 8500 just fine, 9000 probably fine too. If 9000 is indeed your limit, I'd recommend just a basic set of beehive valvesprings. Little less noisy than duals and will do just fine to that rpm limit.
One item of note, not sure if its ever discussed...there is a small plastic oil filter/screen that is cone shaped, it sits depressed in the block but is either the oil feed or return from the head....I put mine back in place when I had the motor apart but I considered leaving it off. 18,500 miles and lots of revs, no issues thus far (knock on wood).
I have a built 2.0 (MAP) kelford cams and supertech valves & dual valvesprings and the car revs to 8500 just fine, 9000 probably fine too. If 9000 is indeed your limit, I'd recommend just a basic set of beehive valvesprings. Little less noisy than duals and will do just fine to that rpm limit.
One item of note, not sure if its ever discussed...there is a small plastic oil filter/screen that is cone shaped, it sits depressed in the block but is either the oil feed or return from the head....I put mine back in place when I had the motor apart but I considered leaving it off. 18,500 miles and lots of revs, no issues thus far (knock on wood).