7mgte compression test

[psycho]

So i found an '87 supra that am interested in buying. It has a stock jdm 7mgte motor, except for a Titan Motorsports 1.4mm headgasket and ARP Head Studs. Am just wondering what kind of numbers should indicate a healthy motor.

thanks in advance

[ToyDoctor]

155 to 160 psi should be close to normal. Most importantly an engine can't have more than 5 psi variance between cylinders.

[psycho]

I know that in some 4 cyl. motors, the maximum allowed variance is about 14psi. Doesnt 5psi seem too little, or is it because its an I-6?

[Orion ZyGarian]

155-160 should be close to normal, but with age expect 140-160. +10 is a better number to rely on...if it was a BHG or something, it'd be like 60; not something mundayne like 1 or 2 :lol:

[psycho]

The numbers were 150 +- 1. Anyways, i just bought the car :-D

thanks for the info.

[Reign_Maker]

Good find... Anytime you can find one that some other poor soul had to do the BHG with is a good deal, :D Especially if they were kind enought to do the mhg with ARPs... Now, to be sure they ARE ARPs, I would pull the valve cover off one side and see... If it's a 10mm hexhead, then they are stock bolts... If its a 12point 1/2 inch then it's an ARP...

Good luck with the car... Now join SupraForums, if you havent already and let us drop knowledge on ya... :D

[psycho]

yeah, the car has many mods and is in a decent condition. Actually, i saw it on the SupraForums, and thats where i got it. I would post the link that has info/pics of it, but the site is down as of now.

[BucsFanatic59]

Jake, the true arp bolts have arp carved in the head as well...

[psycho]

There you go, scroll down for pics.

click here (http://supraforums.com/forum/showthread.php?t=281419)

[BucsFanatic59]

Nice find!

[williamb82]

my arps had 12 point 14mm nuts.

[psycho]

Nice find!
Thanks. The car has some issues, like it needs body work and the vacuum lines are missed up. So far, am really satisfied with what i got compared to what i paid for.

[BucsFanatic59]

My brother was looking to buy that mk3, but he missed out. Your car came with some nice stuff.. Where do you live? And what kind of issues does it have?

[psycho]

I live in new tampa. As i said, it needs a little body work. The bumper is hanging from the passenger side, so i tied it with a string. The paint is not the best. Also, it has a vacuum leak. When the car is idle, its at 15psi. I could see a bunch of lines that are not connected. It needs new spark plugs and a valve cover gasket.

[BucsFanatic59]

Well if you ever need some help, theres plenty of guys who can work on them around here. I'm not the best with these cars, but I've learned a ton this past year. I can lend a hand sometime if you need. Me and Flubyux2 just got done rebuilding my motor, IdealSupra lended a hand at times,Psifactor had parts I needed available, and Cassio helped me pull the motor for free(Thanks Ian, I owe ya bigtime)..My cars running pretty strong now, just a bunch of minor annoying stuff to handle..

[Idealsupra]

god the suspension is FUCKED on that thing....

good luck with it... lord knows picking up other peoples projects is NEVER a fun thing...you can ask jake about that...

[psycho]

Yeah i know that the suspension is real bad. Did you see the car before, or you are just telling by looking at the pics?

[Idealsupra]

Yeah i know that the suspension is real bad. Did you see the car before, or you are just telling by looking at the pics?

i can just tell by the way the front is dipping onto the front wheel lol... i had seen someone post pics of that car on SF.... in the post pics of your white cars with rims thread....i dont know if that was you or the previous owner though....

anyways look forward to meeting ya at some meets and get togethers...

[psycho]

yeah that was me lol. Sure, am looking forward too meet with you guys. When and where do you usually meet?

[BucsFanatic59]

Check the Florida forum on SF, I think I will be organizing a meet for one of the next few weekends.

[Orion ZyGarian]

good luck with it... lord knows picking up other peoples projects is NEVER a fun thing...

Sounds like I was quite lucky then :bigthumb: so far so good!

[Kirk]

Sounds like I was quite lucky then :bigthumb: so far so good!

theres ALOT to fix on your car

the suspension doesnt look fucked but it def looks to be real freakin low... heated/cut springs? if so replace it..its never fun driving a car that ghetto

[Orion ZyGarian]

No, fortunately for me, they are actual aftermarket replacement springs :lol:
Still rides almost as good/as good/better than the rex 300

:lmao: nevermind...I thought you were still talking to me..

[psycho]

H&R springs. Anyways, am going to replace the springs and shocks.

[Idealsupra]

H&R springs. Anyways, am going to replace the springs and shocks.

OH SHIT! you know what i just put 2 and 2 together lol...

my friend works for advance and he said hes seen my old orange 240 and the guy did a bunch of stuff and turbo and blah blah...and that his brother i think he said or something just bought a mk3 that had a bunch of stuff on it already etc etc....

well he just sent me a pic of a mk3 and it looks like the on from your pics...

soooo IM the guy who sold the orange 240 to your brother or whomever lol....

does any of this make sense? hahaha

[psycho]

hahahha. Thats sooo funny. I was the one who im'd you about my friend that wanted the 240. Yes my friend did a bunch of stuff to the 240. If you want, we could get together so you can take a look at your old 240 and my supra.