David_K

I just bought race cams for my D46 heads and all the accessories (springs retainers and the like) and the cams have a 2500-7000 rpm range. is everything ok to spin the motor to 7000 rpm. i know i need a tune to reset the rev limiter but is that all?

Fallstar01

Should be, I know people with stock bottom ends spinning to 7000 RPMs. With boost, or under serious load it might be a different story (like top of 5th gear because of wind). I'd prefer to know that the bottom end is perfectly balanced as well and I'd use really good oil, perhaps with an aftermarket oil cooler.

Derf00

what's the redline on your car? You may spin a main bearing if you reset the rev limiter too high. That and you will want to have a dyno run to see where the is best place to put the limiter at, otherwise you could be overwinding your motor for no reason.

David_K

These cams are ****in huge. i wonder if ill be able to get enought air into the heads. they have a 242/242 durationthe engine is getting rebuilt when everything goes on. new main bearing, rod bearings and piston rings.

Tim37

i have seen it done but i have also seen them through rods if i where you i would go aheand and toss a set of hbeam rods and forged pistons in there then it will hold it no problem.

Matts00GT

I agree with timmy. That's some high rpms. Since you will be working on the motor you might as well throw some new pistons and rods in.

David_K

i already have a set. sorry about not saying that in the first place. i just gotta get some new pistons. the ones i have have a dish in them and i want some flat top ones

Matts00GT

Isn't the dish there to lower compression? I'm guessing you want a higher compression because you are keeping it N/A?

Tim37

well with good rods and pistons and if it is put to geather right then you won't have any probems with 7k.

orang04gt

I read in several forums that spinnig one that much alot, you need to change the oil pump gears to the billet ones.