Changing BHG. Anything else?

icey756 · 06-10-2011, 10:03 PM

Head is in the shop right now getting machines, pressure tested, and a vacuum test for the valves. I think I'm going to get a kit for the silicone vacuum hoses. Comes with 3 different sizes that i need, a hose cutter, and it comes with instructions or something. I was going to go with the ARP head bolts that my friend recommended but im going to do some more research on that as well as the silicone vs regular hoses.

icey756 · 06-14-2011, 06:00 AM

Machinist is taking off about .3mm off the head. I've been reading around online here and it seems like some people are running 19 psi after they took off the same amount on the head and block combined. And they also said they were using just a 1.2mm HKS stopper head gasket. I thought you were supposed to get a bigger head gasket to keep the same compression ratio? If someone could clarify that for me i would appreciate it. Also im not sure weather or not to go with ARP head studs or head bolts. Help me PLEASE! im gonna pull my hair out.

icey756 · 06-26-2011, 02:38 AM

Runs like a beauty now boys. Thanks for the help. I have a stock head gasket cause we didnt shave the block, ARP head bolts and the sent some nice stickers so i can make a shopping list on my car. New gaskets also came with the head gasket so i replaced what ever needed replacing. I'm not quite sure what to run for exhaust. what does everyone else run? 3 or 4 inch? and what metal do u suggest?

Sonyps307 · 06-26-2011, 05:01 AM

If u get silicone hoses then I would use something like zip ties at each end. I have the silicone kit and I kept getting leaks and some would blow off so I used zip ties. I would run a straight 3 inch from turbo back 4 inch is a little over kill. If u got stainless steel then it would never rust but costly.

icey756 · 06-26-2011, 09:52 AM

do u have a link to the kit u bought?
Did u notice any power increase with the kit at all or is it not even worth it?

Sonyps307 · 06-26-2011, 02:44 PM

They sell a kit on eBay but I got mine from my auto parts store (pepboys) 30$ it came with 3 sizes and I just cut to fit. As for power yes I got some power back but my hoses were original so I think I had a leak.

icey756 · 06-30-2011, 10:29 AM

Me and my friend didnt go with a MHG because we didnt shave the block. My question is did we make a mistake by no going with a metal one? I was reading that some ppl dont shave the block and other say that you absolutely have to get the head and block shaved. I was reading suprra_girls thread on steps to modifying your supra and i would love to do a lot of that stuff but idk if i should without a MHG. We did torque the headbolts down to 90psi though.

907mge · 06-30-2011, 04:04 PM

The stock hg is good to around 12psi from what i've heard, but don't hold me to it. But I believe the two reasons to get the head shaved are because the head is not flat enough or to make a smooth surface for the mhg since it needs to be as smooth as possible. So as long as you made sure to clean the surfaces and threads well then you should be fine with lower boost levels. But as far as your torque spec, I assume you mean ft.lbs.. Did you use arp head bolts , because that spec seems high even for them? I did 90lbs on my studs with the moly lube. Also did you follow the patten for tightening and do it in three passes?

06-26-2011, 02:38 AM	#3
icey756 3" Exhaust Join Date: Jun 2011 Location: Wisconsin Posts: 177	And now she runs boys Runs like a beauty now boys. Thanks for the help. I have a stock head gasket cause we didnt shave the block, ARP head bolts and the sent some nice stickers so i can make a shopping list on my car. New gaskets also came with the head gasket so i replaced what ever needed replacing. I'm not quite sure what to run for exhaust. what does everyone else run? 3 or 4 inch? and what metal do u suggest?

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06-10-2011, 10:03 PM	#1
icey756 3" Exhaust Join Date: Jun 2011 Location: Wisconsin Posts: 177	Head is in the shop right now getting machines, pressure tested, and a vacuum test for the valves. I think I'm going to get a kit for the silicone vacuum hoses. Comes with 3 different sizes that i need, a hose cutter, and it comes with instructions or something. I was going to go with the ARP head bolts that my friend recommended but im going to do some more research on that as well as the silicone vs regular hoses.

06-14-2011, 06:00 AM	#2
icey756 3" Exhaust Join Date: Jun 2011 Location: Wisconsin Posts: 177	Machinist is taking off about .3mm off the head. I've been reading around online here and it seems like some people are running 19 psi after they took off the same amount on the head and block combined. And they also said they were using just a 1.2mm HKS stopper head gasket. I thought you were supposed to get a bigger head gasket to keep the same compression ratio? If someone could clarify that for me i would appreciate it. Also im not sure weather or not to go with ARP head studs or head bolts. Help me PLEASE! im gonna pull my hair out.

06-26-2011, 05:01 AM	#4
Sonyps307 Lexus & 550's Join Date: May 2010 Location: Baltimore Posts: 526	If u get silicone hoses then I would use something like zip ties at each end. I have the silicone kit and I kept getting leaks and some would blow off so I used zip ties. I would run a straight 3 inch from turbo back 4 inch is a little over kill. If u got stainless steel then it would never rust but costly.

06-26-2011, 09:52 AM	#5
icey756 3" Exhaust Join Date: Jun 2011 Location: Wisconsin Posts: 177	do u have a link to the kit u bought? Did u notice any power increase with the kit at all or is it not even worth it?

06-26-2011, 02:44 PM	#6
Sonyps307 Lexus & 550's Join Date: May 2010 Location: Baltimore Posts: 526	They sell a kit on eBay but I got mine from my auto parts store (pepboys) 30$ it came with 3 sizes and I just cut to fit. As for power yes I got some power back but my hoses were original so I think I had a leak.

06-30-2011, 10:29 AM	#7
icey756 3" Exhaust Join Date: Jun 2011 Location: Wisconsin Posts: 177	Me and my friend didnt go with a MHG because we didnt shave the block. My question is did we make a mistake by no going with a metal one? I was reading that some ppl dont shave the block and other say that you absolutely have to get the head and block shaved. I was reading suprra_girls thread on steps to modifying your supra and i would love to do a lot of that stuff but idk if i should without a MHG. We did torque the headbolts down to 90psi though.

06-30-2011, 04:04 PM	#8
907mge 20psi boost Join Date: Dec 2009 Location: Harrisburg Posts: 759	The stock hg is good to around 12psi from what i've heard, but don't hold me to it. But I believe the two reasons to get the head shaved are because the head is not flat enough or to make a smooth surface for the mhg since it needs to be as smooth as possible. So as long as you made sure to clean the surfaces and threads well then you should be fine with lower boost levels. But as far as your torque spec, I assume you mean ft.lbs.. Did you use arp head bolts , because that spec seems high even for them? I did 90lbs on my studs with the moly lube. Also did you follow the patten for tightening and do it in three passes?