Technically, if he does it "right the first time", he'll remove the head to install the headstuds.

I'm with Warr on this one. There's absolutely no need for the headstuds right now, and injectors are very easy to add later. I've made the mistake of buying parts that I thought I'd use down the road. Then plans change and I don't need them anymore...a costly mistake of mine.

 

I cant believe the retarded answers in this thread.

No you dont need injectors... no you shouldnt do them "just in case." Installing injectors is a 20 minute operation that should be done WHEN YOU NEED THEM if you ever do.

Headstuds... the debate is still on going as far as Im concerned whether you really need them or not. There are people running over 30spi for long periods of times with absolutely no ill effects.

If you are running 23 to 26psi I wouldnt even THINK about installing them. Especially since most people will mess up the install and cause the head to lift anyway. I installed them when I decided to install methanol and an upgraded turbo running over 30psi. If you arent doing that, DONT touch them. There is NO need. I ran 25psi for over 60,000 miles sometimes more boost than that. Everything is fine.

 

^+1

Head studs are not there for saftey blah blah..... if you ever have to pull the head, get head studs cause it makes it easier to put the head back on and its a good idea to replace the head bolts after they have been torqued anyway, so do the studs then. I have been working on 4G63 since the mid 90's, and I have never seen a motor fail because of a head bolt even with 30psi.... I saw rods fail, holes in pistins, spun bearings but never a head bolt failure.......

Injectors, not really worth doing till you need then, but I bet you'll need them soon, something to think about. Depending on future mods.....

 

regular arp studs are fine, L19s are way overkill. when have you herd of a standard arp failing? cause i haven't.

and this isn't just my opinion, but also my engine builders

 

wont he need the injectors to take use of the additional power from the cams...wont he max out his stock injectors? def agree headstuds are a waste of time and money right now...im adding headstuds this weekend but im also installing valve springs and a dif set of cams in prep for the 35r i will be recieving in a week or so, as well as switching to e 85 so i have to swap out my 680cc injectors for at least 1000's

 

I have cams and run 24-25 psi on the stock injectors still not out of fuel

 

Like I didn't do headstuds when I did my upgrades and now I'm actually going to regret it because I plan on doing the FP red so I'm going to have to pull the head to do the studs properly and I should have done it the first time I got my cams installed.

 

If you need to ask this question about head studs...maybe you should sell your car and get a Kia!

 

cheap insurance from what?

30psi, 35r, daily driven, stock head studs, for over 10k miles so far. 70k miles on the car.

 

Not, cams don't cause a need for injectors.

 

And how often do stock head bolts fail? It's extremely rare and most often caused by detonation, not high boost. Backside oil leaks from installing ARPs with 1X1 method are far more common than failed stock head bolts...

 

so why spend an extra $100 when the standard ones are fine


if you read my post above you will see that i told the OP to skip the arp's unless he is taking the head off.

 

Where is the data to back that up? I could swear people were making big power on these bolts before the L19s came out.

 

That's the point. People are doing big power on stock head bolts, too!! The other point is that if you're going to bother doing the head studs, then remove the head and do the stronger studs.