help choosing cam!!!

[horndog]

Yep what he said, I am going with a smaller 212/206 cam

 

[87GNT]

I'm honestly trying to keep the heads stock

Erson 208/208 hydraulic flat tappet will do just find if you're on a budget. Roller cams are more of a conversation piece than anything.

 

[Pronto]

Roller cams are more of a conversation piece than anything.

I totally disagree. The benefits of roller cams are numerous and well documented.

 

[horndog]

I am going from a 212/212 flat tappet to a 212/206 billet roller from Weber.
Its not an apples to apples build, but if I have the opportunity to replace with better, I will.

 

[ZNix]

We're y'all this tough on me when I first started? Probably... Lol, I deserved it. Roller cams are a huge improvement over a flat tappet. You can grind in faster ramps, more lift, and not have to worry about wiping a lobe with the pressure needed to hold the lifter on the cam. Post up the end goals of the car and we can help. Very knowledgeable guys here.

 

[V6sleeper]

206/206..206/210...210/210

 

[87GNT]

I totally disagree. The benefits of roller cams are numerous and well documented.[/QUOTE

We can all agree to disagree when it comes to opinions on roller vs flat. Either option will work depending on the application. There are well-known engine builders in this community that have built 9 sec TB running flat-tappet with "0" issues.

 

[turbodave231]

It sounds like you are building a car that will mainly be driven on the street? A 212/212 roller cam will work just fine in this application with stock heads or stock ported heads. The Comp Cam lobe for this duration is a #3312. With this lobe, you will somewhere around .503" lift with stock rocker arms. For an iron head application I would go with 112 LSA.

You can expect a smooth idle with this cam and good performance under boost.

You will need to cut the top of the valve guide or the spring retainer will contact the valve seal/guide. You will need to replace your exhaust valves if they are stock valves. The stock exhaust valve has an undercut on the stem and it will not work well with a stem seal.

Personally I think you have bought a turbo that is much larger than you really need for a quick. fun street car. A 70mm turbo may not spool well with a tight converter and will not be much fun to drive on the street. As far as turbos go, there are alot better choices for a quick responsive street car.

Dave

 

[chris kirk]

Stock heads gonna stud em down... but I'm gonna have to make some changes with a 212 if im.not mistaken??

IMO, you'll be very disappointed in performance if you try using a 70mm turbo with stock heads regardless of what cam you use. A 70mm turbo will support about 900/1000 hp and stock heads would never flow that much air to support that large of a turbo. I would talk with Chris Hogeland, Nick Micale, or Bison for the correct application to use a 70mm turbo.

Also, a little FYI, to really do it right, there's a lot more you're going to need. Using a turbo that size is going to require a lot more then just heads and cam. What's your bottom end? Will it support that much hp? You'll need things like: fuel system, engine management, IC, probably a new radiator, transmission work, rear axle, some suspension work, dp, headers, wastegate...... It's a lot of work and lots of $$$.... Welcome to the board and good luck.

 

[V6sleeper]

My suggestion would be to loose the 3800 converter for a true 2800/3000 stall- 245mm, ditch the 70mm turbo for a 58/60 mm, drop in a small roller cam, over build the fuel system, install an alky kit get it tuned right and turn it way up and hold on... no need for a 9 second. 85lb/min turbo that wont work with the rest of your combo.

 

[fastblackracing]

My suggestion would be to loose the 3800 converter for a true 2800/3000 stall- 245mm, ditch the 70mm turbo for a 58/60 mm, drop in a small roller cam, over build the fuel system, install an alky kit get it tuned right and turn it way up and hold on... no need for a 9 second. 85lb/min turbo that wont work with the rest of your combo.

lots of good input here^^^^^^^

 

[turbo6cutlass]

We're y'all this tough on me when I first started? Probably... Lol, I deserved it. Roller cams are a huge improvement over a flat tappet. You can grind in faster ramps, more lift, and not have to worry about wiping a lobe with the pressure needed to hold the lifter on the cam. Post up the end goals of the car and we can help. Very knowledgeable guys here.

 

[turbo6cutlass]

Just now catching up with the thread had small emergency. Like I've stated before I want the stock head just port them. Anyways I will be starting a new thread that way I can give you more details and hopefully everyone can keep up the support. I appreciate it greatly

 

[20psiofevil]

Have you read this thread?http://turbobuick.com/forums/thread...-silver-bullet-seeking-10s-asap.400319/page-9