Newb to the site. Bought a 87 Yellow Supra Today. Introducing myself

AaronCDC · 12-15-2009, 06:20 AM

Quote:

Originally Posted by cre

On a N/A?

yeah. but im kinda a newb so i figured someone on here could give me a good idea.... but i know for now the guy i got it from said he rebuilt it and used a 1.2mm instead of the stock? 0.8mm?

cre · 12-15-2009, 06:26 AM

The stock HG is 1.37mm. The thicker the head gasket the lower the compression ratio... not necessarily a desirable thing on a N/A.

AaronCDC · 12-15-2009, 06:27 AM

Quote:

Originally Posted by cre

The stock HG is 1.37mm. The thicker the head gasket the lower the compression ratio... not necessarily a desirable thing on a N/A.

weird. thicker ones are more expensive lol. so if i went down to a 0.8 MM. which i saw one.... that would be like the best?

AaronCDC · 12-15-2009, 06:46 AM

Quote:

Originally Posted by AaronCDC

weird. thicker ones are more expensive lol. so if i went down to a 0.8 MM. which i saw one.... that would be like the best?

meh sorry i looked wrong. i dont know where i got 0.8 but they have 84 mm bored head gaskets... thinnest i saw was 1.0mm and i have a 1.2mm would i notice much difference between the two?

cre · 12-15-2009, 07:31 AM

Quote:

Originally Posted by AaronCDC

weird. thicker ones are more expensive lol. so if i went down to a 0.8 MM. which i saw one.... that would be like the best?

More materials....

and no... that would be blindly increasing the compression ratio. Granting you a very small bump in power and a nice large bump in risk of detonation. If you want it to be reliable, you want to go with the stock HG thickness + whatever was milled off when the head and block were machined. It's not worth the minimal gain, IMHO.

AaronCDC · 12-15-2009, 07:40 AM

Quote:

Originally Posted by cre

More materials....

and no... that would be blindly increasing the compression ratio. Granting you a very small bump in power and a nice large bump in risk of detonation. If you want it to be reliable, you want to go with the stock HG thickness + whatever was milled off when the head and block were machined. It's not worth the minimal gain, IMHO.

o ok. hmmm. for now should my 1.2mm be ok though? cuz i thought bout just leaving it and gettin my headers and some other stuff done. ooo any idea on where to get a good deal on headers? or maybe someone has some just laying around that they dont want?

AaronCDC · 12-15-2009, 07:43 AM

and just wondering but i have the option in my car that has the range of gas left and my MPG and calendar and blah blah.... how rare is that? someone said its like super rare?

cre · 12-15-2009, 08:48 AM

I'm not going to tell you whether you should worry about the thinner HG or not... I don't know what else was done. I'd ask the previous owner if he happens to have a list of all the specs from the rebuild. Mainly you want to know how much material was shaved off the head and how much off the block, then you want to know if it was bored over and the thickness of the head gasket.

What you're referring to is the SuperMonitor. It was an option for pre89 MKIIIs, not available for 89+. I don't know that I'd say they're super rare... They're not common, but they're easy enough to find. I've actually got two or three packed up somewhere. They were very cool for the time and they're an excellent reminder of how far ahead of the curve Toyota was back then.

12-15-2009, 06:26 AM	#2
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	The stock HG is 1.37mm. The thicker the head gasket the lower the compression ratio... not necessarily a desirable thing on a N/A. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

12-15-2009, 07:43 AM	#7
AaronCDC Stock Join Date: Dec 2009 Location: Shelton, WA Posts: 27	and just wondering but i have the option in my car that has the range of gas left and my MPG and calendar and blah blah.... how rare is that? someone said its like super rare? __________________ 1987 Yellow Toyota Supra. 7MGE N/A engine. TEMS. 5 SPEED, Targa Top

12-15-2009, 08:48 AM	#8
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	I'm not going to tell you whether you should worry about the thinner HG or not... I don't know what else was done. I'd ask the previous owner if he happens to have a list of all the specs from the rebuild. Mainly you want to know how much material was shaved off the head and how much off the block, then you want to know if it was bored over and the thickness of the head gasket. What you're referring to is the SuperMonitor. It was an option for pre89 MKIIIs, not available for 89+. I don't know that I'd say they're super rare... They're not common, but they're easy enough to find. I've actually got two or three packed up somewhere. They were very cool for the time and they're an excellent reminder of how far ahead of the curve Toyota was back then. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

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