vvt big or small cam ly6
Thread Starter
Teching In
Joined: Sep 2014
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From: Mid wisconsin
vvt big or small cam ly6 hello all ,
I have a ly6 (6.0l l92 heads) going in a 2800 lbs Datsun 280z.
my qeustion for everyone is. I'm looking for a vvt cam for my engine it'll be a daily driver in the summer mounths and see the track a couple weekands a year.
I'm just not sure wich way to go for a cam. either go with a cam that's a little big for my combo if it were just non vvt and advance the cam timing a lot to compensate for overlap or get a cam that u would usually spec for a non vvt engine and retard it a lot to get a better top end?
I have a ly6 (6.0l l92 heads) going in a 2800 lbs Datsun 280z.
my qeustion for everyone is. I'm looking for a vvt cam for my engine it'll be a daily driver in the summer mounths and see the track a couple weekands a year.
I'm just not sure wich way to go for a cam. either go with a cam that's a little big for my combo if it were just non vvt and advance the cam timing a lot to compensate for overlap or get a cam that u would usually spec for a non vvt engine and retard it a lot to get a better top end?
TECH Veteran
Joined: Sep 2014
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From: Mississippi
Pat G is awesome as stated above....
On the other hand tho Mast Motorsports have a small VVT cam designed for the LY6 engine made to produce 510- 525 at the crank. Specs are 210/230 with less than 580 lift. With a lift like that it'll last forever with a good aftermarket double springs.
On the other hand tho Mast Motorsports have a small VVT cam designed for the LY6 engine made to produce 510- 525 at the crank. Specs are 210/230 with less than 580 lift. With a lift like that it'll last forever with a good aftermarket double springs.
Thread Starter
Teching In
Joined: Sep 2014
Posts: 49
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From: Mid wisconsin
I couldn't find the cam on mast Motorsports but I did find one on EPS 218/232@.05 .563/.575 lift on 114 lsa rpm of 2,000-7,000
this seems like the smaller cam option I was looking at along with smaller lift so there's not so much pressure from duel springs on the cam phaser so it can stay accurate at higher rpm.
also I have talked to a couple different venders and got different opinions. I guess I was looking for people who have a vvt cam set up and had to tune them. how ruff the car idles or how tunning smoothed it out and no surging etc.
but thanks for the replies they have helped.
this seems like the smaller cam option I was looking at along with smaller lift so there's not so much pressure from duel springs on the cam phaser so it can stay accurate at higher rpm.
also I have talked to a couple different venders and got different opinions. I guess I was looking for people who have a vvt cam set up and had to tune them. how ruff the car idles or how tunning smoothed it out and no surging etc.
but thanks for the replies they have helped.
I couldn't find the cam on mast Motorsports but I did find one on EPS 218/232@.05 .563/.575 lift on 114 lsa rpm of 2,000-7,000
this seems like the smaller cam option I was looking at along with smaller lift so there's not so much pressure from duel springs on the cam phaser so it can stay accurate at higher rpm.
also I have talked to a couple different venders and got different opinions. I guess I was looking for people who have a vvt cam set up and had to tune them. how ruff the car idles or how tunning smoothed it out and no surging etc.
but thanks for the replies they have helped.
this seems like the smaller cam option I was looking at along with smaller lift so there's not so much pressure from duel springs on the cam phaser so it can stay accurate at higher rpm.
also I have talked to a couple different venders and got different opinions. I guess I was looking for people who have a vvt cam set up and had to tune them. how ruff the car idles or how tunning smoothed it out and no surging etc.
but thanks for the replies they have helped.
On the other hand, a non-vvt cam in the .580 230 range will give plenty of HP without any bottom-end loss.
So, I swapped it out for the simplicity of a non-vvt cam and haven't looked back.
Last edited by casias; Jul 7, 2016 at 03:56 AM.
TECH Senior Member
Joined: Jul 2009
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IIRC, Mr Patrick G did a VVT cam with lift north of .600" I really suggest doing a SEARCH and contacting Mr G. He may or may not recommend ditching the VVT based on your goals. Don't settle for a off the self cam.
Thread Starter
Teching In
Joined: Sep 2014
Posts: 49
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From: Mid wisconsin
after reading more on the cams and reading your post casias I'm kinda down to 2 different cams.
either delete vvt and get the BTR stage 1 turbo cam with the easy lobes and use btr platinum duel springs and pushrods. or see if I can get the BTR truck cam stage 3 on a vvt grind and just have to get btr ls6 springs. seems like the BTR truck cam would be perfict with stockish lift at .553" and use stock springs seems like it would work great with the cam phaser extending its life and not beat up lifters either.
either delete vvt and get the BTR stage 1 turbo cam with the easy lobes and use btr platinum duel springs and pushrods. or see if I can get the BTR truck cam stage 3 on a vvt grind and just have to get btr ls6 springs. seems like the BTR truck cam would be perfict with stockish lift at .553" and use stock springs seems like it would work great with the cam phaser extending its life and not beat up lifters either.
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Verdad Gallardo Thread Starter
Teching In
Joined: Sep 2014
Posts: 49
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From: Mid wisconsin
looking at my build more with it being a manual I think I might stick with a non vvt cam. also I'm prolly going turbo in the future and need stiffer springs. the more I read about vvt the more it comes to me on why in theory they only put vvt in automatics. my thoughts are in a manual the crankshaft takes a lot of shock and by doing so yanks on the timing chain then has a good chance of retarding the cam phaser against the load. this is most likely made worse at lower rpm that you don't have full oil pressure to manipulate the cam phaser as well.