Limitations of stock 7bolt head?

[boostednavyac]

This is a two part qestion, first question is, are the stock 7bolt headbolts the only major limitation (as far as parts failing)? Head was supposedly rebuilt with oem parts about 20xxx miles ago. I will be running an FP3052 on squirrel piss 91 pump gas and wastegate pressure (14psi) for now, only because i've read the stock headbolts will fail on me for my goals (e85 and 25+ psi). Questions is, if I leave my stock valves, springs, cams, etc, is my only limitation to run 25+ psi the headbolts? Second question is, Ive over reached my budget already, I don't want to buy all these new parts for the head as well, is it possible to just purchase the ARP headstuds, and install them without taking the head apart, and call it a day? Thanks again for the help, I tried searching but could not obtain definitive responses for what I was looking for. Major Mods that I will be running are as such~

FP3052 w/ tial 44mm WG w/ internal dump to 3'' Downpipe
evo3 exhaust mani
1250cc injectors
AFPR
255 fuel pump
ECMlink v3 full
Innovate Wideband
2g MAF, stock head (hence my question above) stock bottom end

 

[Dyesuperman]

I'm just curious on what mileage you guys (boostednavyac and forumboarder154) are on with your 7-bolts. I've been wanting to achieve airflow levels like that but was always iffy on the integrity of my motor, being a DD and all. I'm all stock with ARP's, new head, and oil pump w/ 120k.

I'm not either of those people but I have DD'd mine fora year at 26 psi without any mishaps on e85 and at times pump gas. First with a 50 trim now with a hx35. Tune it well and it will hold, e85 helps a lot too. I know for a fact the previous owner beat the hell out of this car (surprised it still runs... it was that bad from the stories I have heard) and yet it still runs great. Just take care of it and it will treat you well

 

[JayB12]

It's reassuring to hear this, but every motor is different too. I've been afraid to go to even 20psi on a small 16g, let alone 25ish on a larger turbo. Also for the record my ARP's were installed with the head on the car using the method above.

 

[goodbye]

The stock 7-bolts are pretty beefy, the weak points are the rods and the head bolts, everything else is pretty good for a 400-500whp street car with basic bolt ons and a good tune.

 

[boostednavyac]

I'm just curious on what mileage you guys (boostednavyac and forumboarder154) are on with your 7-bolts. I've been wanting to achieve airflow levels like that but was always iffy on the integrity of my motor, being a DD and all. I'm all stock with ARP's, new head, and oil pump w/ 120k.

Mine is at 142k miles, yes it concerns me a bit as well, but the motto I have going in is that I am going to fully build the car anyways eventually, so I will run the car at around 20psi on 91 octane until I can build the head/bottom end. Since its not my DD, if something breaks, O well because I have my DD to get me to work, and it gives me a definite reason to fully build the GST