turbo v6 vn sluggish down low

[krawczuk]

hi, i went to get me turbo vn v6 tuned yesterday, but the guy said that the cam shaft is out , or needs degreeing in ? cause its pretty sluggish till it hits about 5000 rpm , then after that it runs really well .

the cam is hydraulic , has 240 duration @ 50 thou , and inlet lobe lift is .073 " at tdc.
lift at lobe on ex and in is .326"
eo 84 degrees
ec 36 degrees
io 38 degrees
ic 82 degrees
vacuum at idle is about 10 inches.....

rollmaster single row chain

has 70 mm throttle body , 86 lb injectors , ported heads and inlet manifold 3 inch exhaust system , microtech.

now the cam was installed at zero , ( normal cam timing ) and wasnt degreed in , could this be the cause of the low vacuum and sluggish down low ?
i presume the differance between std cam timing and dialling it in , is VERY little , would it make that much of a differance ? if that isnt the prob , what else could it be ?
thanks,
mark k

[VPioneer]

I know that not dialing in a cam after doing those sort of mods can cause a bit of hastle. But im pretty sure that the reason you've got no power is that your cam is way to big. Im maxing out a buick V6 myself, its N/A, race pistons...porting.... and the cam i have chosen is 216 @50 thou, now thats pretty lumpy for a V6 and the furthest i would go until the idle gets to bad for me (im not even putting my counter balance shaft in). Turbo cams are hell smaller than N/A cams because N/A cams have overlap whereas turbo cams dont, because if they did all your boost goes straight out the other end...

I dont know very much but i meen where did you get your information from to do get this far? Has the motor been built professionally?

Is the low vaccum because of your turbo setup? Maybe your turbo is not big enough or too big? Are those the camshaft manufacturers specs?

[hispeedvp]

any aftermarket cam must be dialled in. you need the cam card, and a degree wheel. the cam card will stipulate how many degrees before or after tdc the cam should be set at. the only problem you may have now is with the cam gears. you may need to buy an adjustabe set depending on the cam. take it to someone who knows what there doing, its not good to run a car with a cam thats not dialled in correctly.

[14secvp]

Turbo cams will tend to have a larger intake duration and lift compared to the exhaust side.

[greenfoam]

I think your only problem is that the cam is too big for a turbo, way too big, it's never going to make power like that

[hispeedvp]

could be the lobe seperation is to close, esp in a turbo, woulb be blowing straight out the intake into the exhaust, either way id get it looked at if your sure before you kill something

[greenfoam]

It's the overlap that's the problem on that cam, it has way too much, a little bit of research before the engine build would have been good because it's going to need a new cam to be drivable and make boost in a decent rev range

[hispeedvp]

whats type of cam is it and whats the part number?

[VT-565]

It is a big cam, but just to add on the topic of turbo cams, you have to watch exhaust gas reversion which will send cylinder temps through the roof and cause all sorts of trouble.

[cracker]

Turbo cams will tend to have a larger intake duration and lift compared to the exhaust side.

other way around dude, its getting helped with the intake but not the exhuast

[krawczuk]

I dont know very much but i meen where did you get your information from to do get this far? Has the motor been built professionally?

Is the low vaccum because of your turbo setup? Maybe your turbo is not big enough or too big? Are those the camshaft manufacturers specs?[/QUOTE]
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hi, i have built the motor myself , and running a super t70 turbo.
the heads have been ported extensively , and using a 2mm copper shim with hylomar.

my friend is running on a stock vr , a t70 turbo , 60 lb injectors , and its running fine, with really good vacuum , stock cam i admit ,
but
when i rang up the guy who done the camshaft i told him wot i have done and what power i was after , and thats the cam i got.

thanks,
mark k

[krawczuk]

whats type of cam is it and whats the part number?

its a hydraulic roller by clive cams, cam no 360A , 112 degree.
mark k

[hispeedvp]

cant find a clive cams website, ring the supplier double check its the right cam for you application.

[krawczuk]

cant find a clive cams website, ring the supplier double check its the right cam for you application.

hmmmmmmthis is great ......my brother rings up clive cams and asks some stuff about my cam , about dialling it in , then clive asks whats the number on the cam , my brother tells him and theres a minutes silence.........

we what ??? we sold you that cam for a turbo ??? clive says..... " no wonder it doesnt start going till 5000 rpm.." u need some thing about 220 degrees at 50 thou.......

when i originally rang him up ,i told him exactly everything what was done to my engine and what use i wanted it for.........

now he says since he sold me the wrong cam , he said he`ll do me a proper one for $350.....
great , now that cams cost me $850 , $ 500 for the first one ,. now $350 for this one......
mark k

[vn calais manual]

its all a learning circle, atleast he is offering some sort fo compensation.. some companies wouldnt give you a scent. keep your old cam, im sure someone would be interested in it. especially if it hasnt done that many kms!

[greenfoam]

I was suprised a bit when you said it was from Clive Cams because I understand hes ex WAde Cams but setup his own shop so I'm sure he knows what it's all about. There must have been some kind of mix up or misunderstanding in the orignial calls

[hispeedvp]

i have a clive cam for sale $300.00 plus postage
212 deg at 0.50"
is a full billet cam brand new never used.
to suit V6 ecotech

[vn calais manual]

sorry to hijack, but i am after the best possible cam for a sc14 charged buick v6 runing 5psi atm, already has bigger injectors and throttle body, i am just curious if anyone knows how big i can actually go before i start loosing power

[greenfoam]

sorry to hijack, but i am after the best possible cam for a sc14 charged buick v6 runing 5psi atm, already has bigger injectors and throttle body, i am just curious if anyone knows how big i can actually go before i start loosing power

Spend your cam money on a small pulley a cooler and some nappies you'll forget about the cam the first time you floor it

[hispeedvp]

^ what he said, but i dont know about the nappies? mind you they are called dunny doors, either wise ring yella terra or c.o.m.e ect pretend you have lots of money and they'll all trip over trying to sell you the best possible cam, have hered you can gain 30kw just from the yella terra intercooler though, and a pulley upgrade is so much easier than a cam, its not just slide out slide in, where as the pulley upgrade is a bolt off bolt on jobby, so much easier for better gains

[vn calais manual]

i understand that guys, i am at this stage just after a cam to begin with to go with my ported heads. ill be looking into more boost soon, just at this stage i am trying to sort out the cam