what happens when u put the greddy kit on in the uk 7.45 psi 3"catless exhaust .255whp im a good 20 bhp down is that because i havent got the standerd exhaust and no cat .Im going to see what the max psi my tuner can get out of the kit befor the backpressure on the manifold, downpipe starts the turbo pushing hot air its in on wed

 

Doesnt matter that its working, we recognize that. What we, or I am trying to say is.... its the WRONG way to do it. The dynamic compression with vtec cams open is in the 7 to 1 range. WHY do you think people are getting 5-6-700 whp out of unopened F20/F22? Because of that fact.
So, if you really feel it necessary to drop CR then go a smidgen. 10.5 or so 10.0 at the lowest. Once the vtec lobes are engaged you will likely be in the 6 to 1 cr range.
Once you study engine dynamics and combustion processes and flame travel you will realize that adding deck hurts the engine in so many ways its astonishing.
Only correct way to drop CR, is dished piston or add CC to the combustion chamber.
That is what i have been saying. Im not just bashing the head gasket for my own amusement. Its backed up with ohhh 20 years of engine building. Im just trying to help, and save some people money....

 

Okay, understood. I get it...adding deck is the improper way to lower compression.

However, from a practical standpoint, hundreds (if not thousands) of people have used the Inline Pro 3mm HG to lower compression over the last 10 years with success and have not seen dramatically shorter engine life as a result. It's not ideal. But it's proven. Why is it perceived as so distasteful to some people on this forum? Is it a prestige thing? There's no denying that for some $300, the practice is far more economical than buying/building a custom engine. Inline themselves has had their company car with a 3mm HG, turbo kit, making 500whp at some 20x psi for tens of thousands of miles.

Personally, I have a dead stock motor because I believe there's no need to drop compression until you're making some real HP. But, I'm not gonna criticize guys who use the 3mm HG as an economical way to lower compression. It's not ideal...it's not the right way to lower compression...but it works.

 

While i agreed with what your saying before you posted, "it does work" i cant agree with them being very reliable.
#1 ive seen and read about TONS of them blowing. (theres several s2ki members who have blown more than 1)
Is every person who installed them retarded? maybe, but i doubt it. Could the blowing be coupled to arp studs, and or bad tune and too much cyl pressure...could be also.
#2 the amount of work needed done to your poor timing chain setup to get it to work correctly is fricken stoooooopid. No point, could have saved the 500 bucks and just spent that on a good tuner. Instead you have to set it all up perfect, the Tchain barely reaches and the tensioner is bottomed out, you have to unpin and reclock your cam drive gear... i mean.....really?

This is the stuff that goes through my head, when i see the proponents of the "spongecake".
I just cant see it ever making any sense. If i could have my way they'd simply stop making the 3mm. To any knowledgeable engine builder or tuner it is quite simply... a joke.
Sorry if i sound harsh its just how i feel about it.

 

I wonder if you're referring to me? It was a problem with the tune. Would have blown OEM headgaskets just as easily.

And as for clocking the timing gear, how can you infer that is a difficult task? Are you suggesting an engine rebuild is a doddle by comparison?

 

lol, doddle.... love it.
True true, while clocking it isnt hard, to me its just one more thing you have to do, that should prove to you its just a hokey ass bandaid on your elbow, for a sore on your knee.
I know i cant change the world when it comes to the 3mm, but ill keep trying damat.

 

Nope, your engine would have been blown instead. I'll take the 300 dollar HG.

 

S2oooNvegas - Well I'm sold. So Vegas, when can I expect you here to do my engine rebuild?

 

If only i could. Id fly out and build one for you. But as you said, tune is most important.
So you prob dont need anything special now that youve got the tune dialed.

 

I am running 11 psi on a stock head gasket runs perfect everyday have a greddy kit on ap1 no cat greddy exhaust I drive it everyday no problems I'm planing on doing a 3mm hg and arp headstuds and running about 22 to 25 psi