2G How should I fix this no compression in cylinder 1?

[BullseyeGSX]

So I was finally able to begin the tear down on the GSX after it sitting for about 4 1/2 months. I was doing a highway pull one day and all of a sudden the car began to lose power big time and sound like an STi without an exhaust so i knew something was wrong.

I took the car to my Dad's shop to park it, we did a compression test on it and sure enough there was no compression on Cylander #1.

So yesterday I was able to get it into the shop and pull the head off and try to figure out what was wrong with it. Well come to find out i blew an exhaust valve to peices !!!.

Now the question is what should I do, how should I fix this problem ? Should I just put new valves in it and slap it back on the car ? or should I pick up a stage 5 or 6 head from DSMparts. I also want to do cams while im this burried into the car what should I go with I kinda wanna do 272's do I need bigger valve springs and retainers does the head need to be machined for these parts I honstly dont know anything about the machining end of the engine so all help is appreciated.

Stage 5

-Hot tanked
-Pressure checked
-Competition valve job *PLUS*
-Stage V port work
-New valve stem seals
-SS swirl polished, and undercut valves
-New guides
-Crower springs
-Titanium retainers
-Decked head surface
-New exhaust manifold studs

Stage 6

-Hot tanked
-Pressure checked
-Competition valve job *PLUS*
-Stage V port work
-New valve stem seals
-1mm over nitrided, polished,
-New guides
-Crower springs
-Titanium retainers
-Decked head surface
-New exhaust manifold studs

Or if there is any other place with good deals on heads and all the stuff listed up there let me know.

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[PR_DSM]

It all depends at the end what your goals are.

A Stock head can support 380hp+ so you can take your head to a machine shop and have them check for warps and resurface if needed. While your added i would highly recommend changing the lifters. You can run 272 cams on a stock springs, JUST DON'T BE TAKING THE CAR ALWAYS TO RED LINE, THEY WILL HOLD BUT NOT FOR LONG. At the end it all depends what is your final goal. SBR has some bad A** heads for sale with no core.

 

[NOSLO2PT0]

You buy anything from SBR and you will soon learn. A bone stock head has gone 9's so you don't NEED to get crazy with anything. If it was my car, and my goals were anything less than 9's, i'd get a new set of standard size valves, a $250 valve job, maybe a used set of Crower valvesprings/retainers (in case i wanted to spin some cams over 8k), and call it a day.

 

[BullseyeGSX]

okay well my car is an auto so it shifts at like 6500-7000 but i pretty much want this car to be bullit proof im looking to run mid 11's to high 10's

 

[NOSLO2PT0]

If that's all you want, just get a standard rebuild and be done.

 

[BullseyeGSX]

Really ? The stock head is good for those times ?

 

[LiquidX]

Yes, stock heads can do some damage on the track. All the cams do for you, is change where your power band is at. It's good for a larger turbo where the main power will be up higher. You need to know your future plans with the car before you start spending money. For all you know right now, 272's may be too big for what you plan on doing and you'll just loose power overall.

I'd like to know what exactly happened to the valve and did you also check your turbo for damage yet? Any piston or cylinder wall damage?

I would recommend getting the valve job done with just a new valve put in. If you want to go more, then get new guides and seals since you seem to want to get it worked on. Larger valves will be good for higher hp applications but not worth the extra cost for a mild job. Check out www.deltacam.com for some awesome affordable cams.

 

[BullseyeGSX]

Wow thats great thanks, See the thing is I just recently got into working on my own car so im slowly learning about engine internals and such. But before I started working at my dads shop he had the machine shop across the street put some bigger valves in when the head gasket went up so im gonna go ahead and order the same size valves just a different brand ... or should I just fix the one ? I drove the car for about 8 miles after the valve blew apart so the other valves arent over worked because of this are they ?

Obviously im gonna wanna do a new head gasket and arp head studs right ? I was looking at the cometic head gasket or there a better one ?

I only ask so many questions cause I really drive the hell out of my car so I need whats gonna last.