Around 300hp power goals?

[Boosted516]

+1 on replacing the head gasket if it hasn't been done so on a 140,000mi car. Start cranking up the power and that head gasket will more than likely just give up even if it was retorqued.

I've got the metal headgasket and ARP studs on my car, 2.5" metal IC pipes on stock IC, 57-trim CT26 @ 11psi, K&N intake, 3" turbo back Cat delete + divorced downpipe and I'm JUST over 300rwhp. It is doable, but you want to make sure you take the necessary preperations for the extra power and get stuff done right so your engine's in proper running order. It's amazing how much of a difference just proper maintenance and tune up stuff will make in terms of power.

What is "just over 300" because that sounds kind of low for all your mods. Alec, im having the same issue. My head was rebuilt and the hg was replaced by the previous owner about 10k miles ago (i have receipts to prove it) but i want to know if just a retorque will hold 12psi. I just bought a ddp with a full 3in and a greddy type s ebc for dirt cheap but im nervous to install it.

 

[Alec]

What is "just over 300" because that sounds kind of low for all your mods. Alec, im having the same issue. My head was rebuilt and the hg was replaced by the previous owner about 10k miles ago (i have receipts to prove it) but i want to know if just a retorque will hold 12psi. I just bought a ddp with a full 3in and a greddy type s ebc for dirt cheap but im nervous to install it.

I have a feeling we should be ok. It's not that much stuff. The DDP and test pipe will help let the engine breathe better and should reduce the risk of a BHG. I have a feeling 11-12 psi should be ok.

 

[Zumtizzle]

I can't get MHG because I can't machine the block, only head.

You are in luck!

I'm going to offer rentals on my Reg Reimer Lapping tool!!!

 

[Boosted516]

Alec why dont you wanna do it? do you plan on keeping your car?

 

[Alec]

Alec why dont you wanna do it? do you plan on keeping your car?

Do what?

 

[Boosted516]

a metal hg

 

[Alec]

a metal hg

I don't really drive my car that much and when I do, I don't beat on it. Time and money is also a big factor because school is starting up in a couple weeks and I don't have a job to afford all that.

 

[Boosted516]

same here but if i were you id go for it, the only reason im hesitant is because i dont think im keeping this car long and it was just done

 

[hvyman]

your going down the cheap route which never ends good. save and do it right. a stock hg shouldnt(not that it hasnt been done) be pushed much over 300hp. having a free flowing exhaust is not going to save you from getting a bhg. if you run too much boost and get the motor hot and blow out the hg or run lean and detonate the motor and your going to have problems and from the sounds of it you wont have money for a rebuild.

not trashing you here but you wont do your own brakes but you want to up the boost without actually really knowing what will happen and why. you have an idea but there's still alot for you to learn. take it slow and get to know the car better. just a opinion.

 

[Alec]

your going down the cheap route which never ends good. save and do it right. a stock hg shouldnt(not that it hasnt been done) be pushed much over 300hp. having a free flowing exhaust is not going to save you from getting a bhg. if you run too much boost and get the motor hot and blow out the hg or run lean and detonate the motor and your going to have problems and from the sounds of it you wont have money for a rebuild.

not trashing you here but you wont do your own brakes but you want to up the boost without actually really knowing what will happen and why. you have an idea but there's still alot for you to learn. take it slow and get to know the car better. just a opinion.

lol, I've learned a lot since then. I still can't believe I didn't do the brakes myself. That was stupid. Well, not necessecarily 300hp, more like a DDP, test pipe, hard pipes, and 11psi. Whatever that gives me, I'd be happy with it. The problem from the factory was that the HG wasn't torqued high enough which I fixed by re-torquing it. I know someone who ran 16 psi daily on stock HG and bolts with no issues. It seems like you guys automatically say, "MHG" as soon as you hear about increasing the boost. Once the HG is properly torqued, it should hold up as much as any other head gasket. Explain to me why a stock HG "shouldn't" push 300hp? I want actual reasoning, not just saying, "I got a BHG, blah, blah, blah." 300hp really isn't THAT MUCH.

 

[Quin]

You'll be fine if you don't have detonation... I wouldn't even worry about it. Stock HGs can last forever, it's all in the tune.

 

[hvyman]

cause a stock hg is weak.

 

[Alec]

cause a stock hg is weak.

By what standards? Of course a MHG is better, doesn't mean a stock one is bad. The head gasket was fine, it's just they didn't torque it high enough from the factory. When torqued properly, the 7M is one hell of an engine.

 

[rtrdpenguin]

If it's in good condition I wouldn't worry about just putting some bolt-ons on it. A MHG is good for peace of mind and if you plan on going higher but usually BHG's don't just happen out of the blue even on the 7M without overheating or some other issue

I've never had one (knock on wood)

 

[Alec]

If it's in good condition I wouldn't worry about just putting some bolt-ons on it. A MHG is good for peace of mind and if you plan on going higher but usually BHG's don't just happen out of the blue even on the 7M without overheating or some other issue

I've never had one (knock on wood)

I'm staying with bolt-ons and the stock turbo. I'm just going to be doing things like full exhaust, Aluminum Radiator, EBC at 11 psi, Gauges, intercooler hardpipes, spearco intercooler, and lets of engine dress up. After I get tired with all that I will probably have the capital to get a MHG and take it from there.

 

[hvyman]

if you put enough boost to a stock hg it will blow out. that one of the things changed for the jz series.

 

[Quin]

Ignore that guy. People have made over 500rwhp with stock head gaskets and stock bolts. It's not that bad. Follow my advice, keep it out of detonation and it will last.

 

[Alec]

Ignore that guy. People have made over 500rwhp with stock head gaskets and stock bolts. It's not that bad. Follow my advice, keep it out of detonation and it will last.

Any advice for avoiding detonation? I already have welded ceramic coated valve covers from a 700 hp Supra, I think that may help.

 

[black89t]

change your fuel filter like i said on sf. when i put my motor in my new shell it was running lean by the looks of the whitish plugs(didn't have a wb) and just wasn't pulling like it did up top in my old shell. changed the fuel filter and problem was solved. i even cut it open for fun. and holly shit is all i can say. there was so much grit in there. not to say yours is going to be as bad but its cheap and easy to do. just dont twist the line.

what you really need to do is check the compression. that will tell you what shape you engine is in. if the #'s are low i would hold off on the mods.

http://www.cygnusx1.net/Supra/TechTips/compression_test.aspx

 

[blk92suprat]

lol, I've learned a lot since then. I still can't believe I didn't do the brakes myself. That was stupid. Well, not necessecarily 300hp, more like a DDP, test pipe, hard pipes, and 11psi. Whatever that gives me, I'd be happy with it. The problem from the factory was that the HG wasn't torqued high enough which I fixed by re-torquing it. I know someone who ran 16 psi daily on stock HG and bolts with no issues. It seems like you guys automatically say, "MHG" as soon as you hear about increasing the boost. Once the HG is properly torqued, it should hold up as much as any other head gasket. Explain to me why a stock HG "shouldn't" push 300hp? I want actual reasoning, not just saying, "I got a BHG, blah, blah, blah." 300hp really isn't THAT MUCH.

Seems like the best option for you is to just deck the head and get a new composite gasket with ARP bolts. This will hold your power levels safely and only set you back ~250 bills if you do all the labor yourself and just bring the head to a shop to machine. This is what I did. Get a valve job while its there too if you opt for this route.