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Rebuilding Top End Of Motor, Whats Good To Change For Power


fpv229

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  • Member For: 16y 5m 12d
  • Gender: Male
  • Location: north QLD

Why waste you money on cams mate with the stock turbo? Your not going a built bottom end so gains would be very minimal. There is no need to change them stock bf ones will be fine. Better off using the money on getting your oil pump gears done.

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  • billet turbos and weathered engines dont mix
  • Donating Members
  • Member For: 12y 5m 12d
  • Gender: Male
  • Location: Wollongong

Well, it is not top end but pistons and rods if you want to go all out power wise - plenty of choices and IMO the dollars are reasonable for what you get.

The heads on these things work well so other than a basic clean up / inspect / service a big dollar port job is not essential - have a look at the 400RWKW posts for guidance. However, there are success stories with headwork. Very much a personal choice and requires research - you do need to find someone who knows this sort of work.

Quality valve springs for sure. Camshaft changes - well, there are reports of good results and not so good results. If it is a BA, it does seem that the factory FG cams are a mild improvement and provide no issue for tuners. After that, it depends on the type of performance you want and how much you want to pay. It is also something you need to discuss with the tuner.

well I am ordering a new bottom end on monday so there goes the idea of forged pistons, etc.

just more wanting to know what sort of upgrade are worth in the top end and if its even worth touching it?

I.e port and polishing the heads, valves, valve springs, cams?? if anyone has any info would be great

You got your answer there. I can see you just want to hear yeh change cams itll be good. Mate if you want to change cams, change them. Not necessary, theres guys running HUGE power with stock ones. But if you after that nasty worked sound, then by all means go ahead. All depends on how much money you have to play with mate.

Id first be looking at valve springs and oil pump gears, THEN worry about cams. They do sound mean with a decent set.

Just my $0.02

Edited by MA91CK
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  • Member For: 12y 3m 12d
  • Gender: Male
  • Location: Brisbane

I only did cams soley because of the sound and the fact I was doing my springs and its a matter of just swapping the cams over lol but u cant really complain about a 40rwkw gain on the same boost for the price of $1150

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  • REST IN PEACE V8
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  • Member For: 16y 6m 13d
  • Gender: Male
  • Location: Woodridge on the park bench

Have to agree about cams I'm running atomic 4.5 plus with the vct on 16psi on bp 98 car made 400rwkw my tuner said same mods no cams cars are around the 350rwkw mark

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  • Member For: 11y 6m 8d
  • Gender: Male

whats the oil pump do and what aftermarket ones would u go..also what price range are they as im abit strapped for cash atm.

and yeah the cams honestly are for the sound mostly lol

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  • Member For: 12y 3m 12d
  • Gender: Male
  • Location: Brisbane

1150 for the set and yes I also use the atomic stage 4+ without fixed gears and and hi stall auto.. it all comes down to who tunes it and yess me and rip85 get our cars tuned at the same place in brisbane

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