Supporting an increased Rev Limiter 8500-9000
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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?
I have been running my car to 9k for 2 years with no oiling modifications. I stayed on a 2.0l, which will also have an effect on getting up there. Everything else seems to be fine.
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).
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.
You didnt go sleeved huh? Im at the almighty crossroad myself... Which way to go from here...
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If you stay in that area you will be fine...
I'd have to say I wouldnt want to be just in that realm.. Im sure, the never ending/ongoing need for more will hit after some time
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Thread Starter
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From: Toronto, Canada
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).