What size cam could I put in my swtock head?

[Iheartboost]

What size is the biggest cam I can put in the stock head on a 2nd gen 6 bolt? I found some cheapish 272 dur 9.8mm lift cams online, I just don't want to buy these and have then damage the head. Also,what's a good source for an iron head and bolts?

 

[VETTE_50_TH]

All the heads are aluminum for the 4g63. And a 264/264 is a good choice for a smaller turbo. 272 will be ok for the top end, but lose torque since you would have a stock turbo.

 

[hurricanecris24]

Depends what you want with your car and what setup you have.

 

[Iheartboost]

All the heads are aluminum for the 4g63. And a 264/264 is a good choice for a smaller turbo. 272 will be ok for the top end, but lose torque since you would have a stock turbo.

I understand, I have big plans for this car, and will have the cash to back it. So will the stock head casting handle something bigger, like a 288? or will I need to upgrade to a heavier duty aluminum one? I have a 16g turbo min the mail, though I'm not hooking it up yet, I have much work to do like head, ecu, fuel, and worst of all this blasted transmission.

 

[VETTE_50_TH]

288 on a 16g? . ok

 

[ramsack]

An iron head, if you made one, would be stronger and less resistant to warp, but would be way more prone to inducing knock than aluminum. Iron can't remove heat fast like aluminum can.

 

[Tanro]

Bigger is not allways better. Sure it feels good to say I am running a 288 cam. But really you need to look at what your wanting out of your motor. A set of 272/264 is going to be optimal for street/strip setup. If your going full strip grab a set of Crower or HKS 272/272 or bigger. But your gonna want to be running a bigger turbo with a bigger cam. You need to be able to push more air or your just gonna loose power.

 

[Iheartboost]

288 on a 16g? . ok

yeah buddy Brian Crower Cams Stage 4 288/288 4G63 Eclipse GST GSX 4g63t DSM [BC0103] - $390.55 : Real Street Performance Engine Parts, Pistons Rods Cams Valvetrain and More

 

[ramsack]

This Cam is perfect for those looking to make big power in their full race motor. This cam would be best suited in a built race engine with around 67mm or larger turbo. They will raise the powerband up to where a larger turbo can use it most efficiently.

Did you miss that?

 

[Iheartboost]

Bigger is not allways better. Sure it feels good to say I am running a 288 cam. But really you need to look at what your wanting out of your motor. A set of 272/264 is going to be optimal for street/strip setup. If your going full strip grab a set of Crower or HKS 272/272 or bigger. But your gonna want to be running a bigger turbo with a bigger cam. You need to be able to push more air or your just gonna loose power.

what are the stock cams? somewhere around 250/250~?

 

[ramsack]

Stock cams are 248°/248°. 288° for a 16g is overkill.

 

[Iheartboost]

Stock cams are 248°/248°. 288° for a 16g is overkill.

yeah, I'll probably never use a 288, I was just asking if it would fit in the head properly. if I ever go with that size, it probably means I'm dumping some massive boost into it (I want to beat the record of 86 PSI witin 2 decades)

 

[WickedQuikAWD]

anything bigger than 272s on a stock head is overkill and the stock springs will be taxed. 288s are way to big for your application and you will lose a lot of power under the curve. there are a lot of people making big power with 272s, look into it... 264s or 272s are your best bet. bigger is not always better when it comes to cams... there are a lot of under performing over cammed engines out there, dont be one of them.

 

[black91awdturbo]

Hmm I sense a I blew up my car gosh dsm's are so much junk etc thread coming.....

 

[Iheartboost]

Hmm I sense a I blew up my car gosh dsm's are so much junk etc thread coming.....

heh, I can see where you get that feeling, but I'm one of those people that don't lay the blame on the manufacturer when they blow their stuff up. even if I do blow a few motors; they're CHEAP!!

 

[Tanro]

I really dont understand what he is asking now. A stock head is not gonna handle those cams, but there really is no such thing as an aftermarket head. You have a lot of after market pieces you can use to build up a blank head.

I would at Kiggly Springs, Ti Retainers, high temp valve seals, port and polish, +1mm oversized valves and then you could run a 288 cam, But really with that big of a cam your gonna run into valve float.

Why anyone would want an iron head is beyond me, forged aluminum would be stronger, and dissipate heat much more quickly. It would also weigh less 900 metric tons as well. As far as warping yes it would still have a lower threshold on warping but if your overheating you should be looking at why, and going to an iron head is gonna help any on that end.

 

[JusMX141]

What size is the biggest cam I can put in the stock head on a 2nd gen 6 bolt?

This doesn't exist, unless someone has swapped a 1990-1992.5 6-bolt engine into a 1995-1999 car.

I found some cheapish 272 dur 9.8mm lift cams online, I just don't want to buy these and have then damage the head.

272's are about the limit for stock valve springs at stock rev limitations before you run into float issues that may lead to engine damage.

Also,what's a good source for an iron head and bolts?

Are you shitting me?

 

[lowboost13]

Ok, so i read this whole post and now im wondering what i should do. I have a 16g turbo, brian crower stage 2 valve springs and retainers, stock valves, ported and polished head. Would brian crower 272/272 cams be to big for the evo 16g, or do you think it would be a good choice for my setup?

 

[BogusSVO]

lowboost13.... Read this thread
http://www.dsmtuners.com/forums/cyl...est-delta-hks-272-delta-k272-bc-272-cams.html

It has alot of good info about cams

 

[my98gsx]

I would go with 272's especially with a 2.0l where you would get the upper rpm gains.

 

[eclipserst96]

If your looking for a little longer duration cam and like a car that lopes close to v8 cars, then go with 280 cams. You want something to spool the 16g with ease get some 274 degree cams.

Thedsmgraveyard.com
Or
Ffwdconnection.com

Look at some of their cam setups and go from their your stock head will be fine with these cams, you just need to find the powerband you like most.

 

[lowboost13]

Ok thats everyone who replied it really helps A lot.