4g63t 6bolt Build. Boost?

selsea09 · Mar 17, 2010

Hey guys, Sorry if this post is in the wrong forum. I was not sure were to post it. I have a question about how much boost I can run with my build.

Im building a 4g63t 6 bolt.
What parts I have in it:
Wiseco Pistons.
Eagle H-Beam rods.
ACL race bearings, Main/Rod.
ARP Head Studs.
Brian Crower 272 Cams.
BC Valves.
BC Adjustable Cam Gears.
Topline Lifters.
Topline full gasket kit.
650 FIC Injectors,
FIC Fuel rail.
Ebay FMIC, supports up to 350 WHP. (Will probably have to buy a new one.)

Anyways, Im going to upgrade to a Big 20G turbo.
I was wandering how much boost I will be able to run, without running into any problems.

2gblacktalon · Mar 17, 2010

Assuming you are putting on a good head gasket (MLS, cometic felpro etc.) the 650 injectors will be your weakest point. What are you using to tune?

greenstreak · Mar 17, 2010

Drop the top line gasket kit unless you want to be fixing random oil leaks prematurely.

There is no real answer to your question. Motors aren't rated for boost pressure. You could pop a built motor with bad tuning and 10psi and you could tune it well for 35psi.

4g64fiero · Mar 17, 2010

Yep topline sucks dick. I just used one of their kits on my motor and all of them leak. The valve cover gasket might as well not be their. The oil return gasket leaks although the oil pan and oil return tube were stripped then hot tanked and repainted. It quite literally has almost caught my car on fire. Seriously worthless POS gaskets. Excuse me for thinking they could contain 8 psi of oil pressure.

And I am a guy that uses torque wrenches for anything I can find a torque value for.

:madfu: topline.

4g63t 6bolt Build. Boost?

selsea09

2gblacktalon

greenstreak

4g64fiero

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