Deck the heads?? i think
#1
Deck the heads?? i think
Well today my cuzin and i went to pick up his motor that he dropd off at the machine shop( a LT1, trans am).. to do a some work to it.. then he told him to Shave the heads..*deck them* .. so i was like WTF, then he broke it down to me.. closer to the piston, Better compression.. so i was wonderin could that work on our cars VQ30.. say if take the HEads and deck/shave it????? and if so, liek does it make a Huge differnce in TQ/Hp?
thanks in advance
-moo
thanks in advance
-moo
#3
A few issues that could arise if you do that:
1. The holes in the inner timing cover might not line up anymore (perhaps easily remedied by enlarging the holes, i suppose, but still not a fan of the concept)
2. You might have to modify the lower intake manifold since the heads will be sitting closer together
3. Cam timing will be affected indirectly
Do it right with domed pistons or don't do it at all. Just IMO.
1. The holes in the inner timing cover might not line up anymore (perhaps easily remedied by enlarging the holes, i suppose, but still not a fan of the concept)
2. You might have to modify the lower intake manifold since the heads will be sitting closer together
3. Cam timing will be affected indirectly
Do it right with domed pistons or don't do it at all. Just IMO.
#5
thanks nismology.. i see what ur saying.. i was just wonderin like if it made a difference and if it was worth it.. but i think the 3.5 is really whats worth the money..
but 3.5swap is like crzy man, u gotta do alot of lil stuff to get it right, such as the timing align/iacv relocation/ and those lil stuff? i just odnt wana do it and have problems with startin or runin..
But i'ma end up doing it.. Worse case i'd put my old motor back in i guess..
but 3.5swap is like crzy man, u gotta do alot of lil stuff to get it right, such as the timing align/iacv relocation/ and those lil stuff? i just odnt wana do it and have problems with startin or runin..
But i'ma end up doing it.. Worse case i'd put my old motor back in i guess..
#6
Supporting Maxima.org Member
iTrader: (17)
Join Date: Aug 2004
Location: Montreal, Qc, Canada
Posts: 5,437
I'm going to disagree about the domed pistons - yes it is "the" way to do it correctly but personally I would leave it up to Nissan and not touch the entire shortblock with a 10 foot pole (except of course ARP rod bolts). I've just heard a little too much about some aftermarket pistons going oval in no time and basically screw up your block unless you get .020 over.
And I would not "mill" or "shave" the heads on a DOHC engine at all. If I were to raise compression on a VQ35 I would do a Head/Cam package. I.e fairly priced aftermarket cams and bring the heads to a shop to bump compression and do a port/polish job while they're at it. Just that and a great IM and that 3.5L will breathe much better.
Although I'm not sure at all it's possible to add material to the combustion chamber to raise the comp. But I would MUCH rather do a head/cam package than start playing with block internals and having to have the crank professionaly put back in. Because when that block goes boom it's much cheaper if it's just a normal, stock VQ35 block.
And I would not "mill" or "shave" the heads on a DOHC engine at all. If I were to raise compression on a VQ35 I would do a Head/Cam package. I.e fairly priced aftermarket cams and bring the heads to a shop to bump compression and do a port/polish job while they're at it. Just that and a great IM and that 3.5L will breathe much better.
Although I'm not sure at all it's possible to add material to the combustion chamber to raise the comp. But I would MUCH rather do a head/cam package than start playing with block internals and having to have the crank professionaly put back in. Because when that block goes boom it's much cheaper if it's just a normal, stock VQ35 block.
#7
Originally Posted by JClaw
I'm going to disagree about the domed pistons - yes it is "the" way to do it correctly but personally I would leave it up to Nissan and not touch the entire shortblock with a 10 foot pole (except of course ARP rod bolts). I've just heard a little too much about some aftermarket pistons going oval in no time and basically screw up your block unless you get .020 over.
And I would not "mill" or "shave" the heads on a DOHC engine at all. If I were to raise compression on a VQ35 I would do a Head/Cam package. I.e fairly priced aftermarket cams and bring the heads to a shop to bump compression and do a port/polish job while they're at it. Just that and a great IM and that 3.5L will breathe much better.
. But I would MUCH rather do a head/cam package than start playing with block internals and having to have the crank professionaly put back in. Because when that block goes boom it's much cheaper if it's just a normal, stock VQ35 block.
And please explain how a "head/cam package" raises the static compression ratio without shaving the heads.
Thread
Thread Starter
Forum
Replies
Last Post
magiconthetire
Audio and Electronics
2
10-26-2015 09:03 PM
worldwiderecognized
6th Generation Maxima (2004-2008)
0
09-30-2015 01:16 PM
Kyle Lee Cleveland
6th Generation Maxima (2004-2008)
3
09-28-2015 07:58 AM