cams

[102487thedude]

Do you guys know how makes the best cams for our cars. and also i would like to know how has changed valve springs and retainers with out lifting the head. please let me know

[317ssayzarc]

you cant change the springs and retainers w/o removing the head...

CAT cams are the best cams for the 1.8t imo, I have the 3653's and my dads has the 3658's... if you are going to spin over 6k with a turbo that can actually product boost up there, you will notice a big difference... for anything larger than a 2871 cams are a must to get the most out of your setup

send a pm to issam@034 on here and he'll set you up with the right cams for your particular application

[20vturbo]

you can actually change the springs whthout lifting the head...You will have to block the motor from turning, then you remove the spark plug and put a hose in there to send compressed air into the cylinder, that air will keep the vaves from falling inside when you remove the springs...I know it has been done on other motors but never heard of someone doing it to a 1.8t

[dirtybrd]

It would be nearly impossible to do on the car. I did the springs for my car and almost lost an eye. The springs go into holes and its very hard to put the locks in. I have 3658's.

[317ssayzarc]

yes sir, those keepers are a bitch!

[20vturbo]

u need a special tool for that, my guy uses an air tool for that off the car of course

[317ssayzarc]

u need a special tool for that, my guy uses an air tool for that off the car of course

yea, you can make one out of a motorbike valve spring compressor and an adapter on the end since theres such a deep well where the retainers reside...

[absolutegtr]

+1

I have put a cam in my friends camaro before, and when we changed out the springs and retainers for the valves, we used compressed air in the cylinders to keep the valves from falling.

Worked like a charm

[dirtybrd]

Yes, but those springs aren't surrounded by metal.

[RLB6]

If just the cams are being replaced, then it can be done without removing the head. Right?

[dirtybrd]

Yes, but if you go bigger than 3651's and higher then the stock rev. limiter you need springs.

[IceMole]

you can actually change the springs whthout lifting the head...You will have to block the motor from turning, then you remove the spark plug and put a hose in there to send compressed air into the cylinder, that air will keep the vaves from falling inside when you remove the springs...I know it has been done on other motors but never heard of someone doing it to a 1.8t

I did something like that when I was 16 on my first car, but I used a thick string and brought it up to TDC on each cyl

[dirtybrd]

That's another way, but just not for our engines.

[102487thedude]

i think i am going to try the compressed air trick and see how it turns.


Also what springs and retainers are you guys using and are you still using stock valves.

[20vturbo]

you can use ferrea or supertech valves and are very recomended for high revs

[20vturbo]

by the way i see you have a stroker and an aeb head, whomever built your motor should have known about the valves and springs, it would have been a lot cheaper to do when you did the stroker

[dirtybrd]

i think i am going to try the compressed air trick and see how it turns.


Also what springs and retainers are you guys using and are you still using stock valves.

If you try and don't succeed, your car will be down and you'll have to pull the head, so just be ready. I run Ferrea springs, Titanium retainers and exh. valves.

[20vturbo]

bring each cylinder at tdc as you do it and do one valve at the time, having the piston up will prevent the valve from going completely in the cyl in case it does fall

[102487thedude]

if i plane on reving to 7500 only do i need to do the valves or just springs retainers and cams will be fine?

[dirtybrd]

7500, you should be fine.

[dougyfresh]

by the way i see you have a stroker and an aeb head, whomever built your motor should have known about the valves and springs, it would have been a lot cheaper to do when you did the stroker

It was a used AEB head that was bolted on without any modifications to it when the bottom end was built. Now he's getting around to building the head.

[102487thedude]

thanks for clearing that dougyfresh

[102487thedude]

7500, you should be fine.

do u think I can get away with just doing cams

[dirtybrd]

Most likely. But it's better to be safe then sorry, maybe Mike will chime in here soon. I think he might know best.

[317ssayzarc]

i rev my golf to 7500 and no problems here... you should REALLY do upgraded exhaust valves though...

[dougyfresh]

i rev my golf to 7500 and no problems here... you should REALLY do upgraded exhaust valves though...

That is what I've done. Upgraded exhaust valves with OEM lifters, cams and springs. I also have OEM intake valves and a valve face grind. No port or polishing or enlarged valves.

Jake's got a very nicely built AEB head.

[Wizard-of-OD]

Go 3652's (CAT) and disable your VVT.Send me a PM for further details.

[AudiA4_20T]

Go 3652's (CAT) and disable your VVT.Send me a PM for further details.

Aren't the 3652s a bit aggressive? Anyway Issam my question is, can we just drop non-VVT cam tensioners into our heads if were going to run those cams? Wouldnt that be easier?

[Wizard-of-OD]

You could if you wanted BUT you would still need to eliminate the VVT in the software or else your going to throw a cell.

On a positive note if your VVT tensioner is still good and useable you can sell it to recoup the cost of a brand new non-VVT unit.

[dougyfresh]

you cant change the springs and retainers w/o removing the head...

CAT cams are the best cams for the 1.8t imo, I have the 3653's and my dads has the 3658's... if you are going to spin over 6k with a turbo that can actually product boost up there, you will notice a big difference... for anything larger than a 2871 cams are a must to get the most out of your setup

send a pm to issam@034 on here and he'll set you up with the right cams for your particular application

3653s and disable the VVT? Hmmm....

[317ssayzarc]

now your thinking

[AudiA4_20T]

3653s and disable the VVT? Hmmm....

this is what I am going to do... Chris did it already its not really a breakthrough... Im pretty sure youd love them Doug

[CO AVANT]

Are 3653's gonna move the power curve too much to the right with a 2871R turbo though? His peak power is between 4000-6500rpms, not 7000rpms+ like on a 30 series turbo... I'm sure Bob would know the best cam lift/duration for his engine/turbo setup. I would not want any bigger than the 3651's right now for my 2871R. Would be different if I went 30 series...

[dirtybrd]

3658's and disable VVT.

[dougyfresh]

Chris,
What is gained by going with the 3658s over the 3653s? I will be emailing BobQ for his opinion and order. Think I am going to put a set of cams in prior to retune.

This is pretty convincing data:
3651s before and after: http://forums.vwvortex.com/zerothread?id=3915033

[AudiA4_20T]

Chris,
What is gained by going with the 3658s over the 3653s? I will be emailing BobQ for his opinion and order. Think I am going to put a set of cams in prior to retune.

This is pretty convincing data:
3651s before and after: http://forums.vwvortex.com/zerothread?id=3915033

and the 3651s are a real moderate grind

[CO AVANT]

I would think 3652's and 3653's would be better suited for a 35R turbo over a 2871R turbo... All about where the power band needs to be. Don't want it to move too far to the right with a 2871R... 3658's or 3651's seem like a better option with the turbo Doug is using.

[JBM]

so what would be good for a GT3076 with hks .73 hotside :)

btw clint-its on like donkey kong

[AudiA4_20T]

so what would be good for a GT3076 with hks .73 hotside :)

btw clint-its on like donkey kong

good, go with the 53s or 58s

[317ssayzarc]

I would think 3652's and 3653's would be better suited for a 35R turbo over a 2871R turbo... All about where the power band needs to be. Don't want it to move too far to the right with a 2871R... 3658's or 3651's seem like a better option with the turbo Doug is using.

But the 3658's are bigger than the 53's, so how would they suit Doug better Jordan? 53's FTW!