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Posted by amballer82822, Sep 16, 2011
Bolt-on Tech - 4G63 intake, exhaust, intake manifold, ignition, fuel system, cooling, etc.
I love STM. so would this be okay to get http://www.streettunedmotorsports.com/parts/arp_head_studs_4g63_evo_dsm.htm
If that's the stock 7bolt, ARPs are better than stock.
Just the standard 7-bolt ARP headstuds. I believe the part number is ARP 207-4203. ARP 7 bolt DSM Head Stud Kit : JNZ Tuning, ARP 207-4203 ARP Head Studs They also make an undercut head stud but from what I have read the standard set works best for our application.
*EDIT - The link you posted from STM is good, just make sure you specify the DSM 7-bolt head studs.
Doh. Don't neg rep me!
my first dsm was a 93 tsi 7 bolt with a stock 14b, and i stretched the stock head studs while driving on the highway, lifted the head slightly apart from the block, and blew all the oil and coolant out into the engine bay before the motor seized up.
chances are it was because i was running 18-19 psi on the stock sidemount and injectors (was my first dsm 10 years ago when i was 17 before i had any experience), but my point is it can happen, and its better to be safe then sorry when talking abut a low cost upgrade like arp studs.
I am also curious to hear what an experience DSM vendor and support has to say about ARP headstuds, especially if it contradicts what we have been saying. I would argue it is "needed", thats how you learn, sharing ideas and debating.
I feel the sameway. Yet, if not needed then no reason you knw.
Sounds like your issues stemmed from a poor tune. Definitely not the head bolts fault.
re-rx7 - You don't nessacerily need ARP head studs. I ran stock 7-bolt head bolts up to 400 WHP and pushing 47 lbs/min, and I never pushed a drop of coolant. BUT, I would consider them if you think you may be flowing more airflow in the near future. By design, studs are better than bolts; just something else to consider.
Honestly, this car will never see a bigger turbo than a T28. Good post I never really thought of it that way. I figure with a good tune on 19 psi(560cc Evo,190lph) i can get about 280 Whp since i have access to 93 in Texas.