Great!! Now you're joining the team!!!! Have to go, don't have time to read the thread now, but I'll read the whole thing later for sure.
dugums build - need a ton of help!!!
- Thread starter dugums
- Start date
Your gonna have to do the head gasket eventually, kinda like the saying: "Measure twice, cut once", well: "1 Metal HG, no BHG''....haha... no seriously.
high psi 1jz said:
http://www.supramania.com/forums/showthread.php?t=29335
I think I'm with JDub on this. This is an interesting read and should be read before making this decision.
Specifically...
"My contention has always been: You want to have a MHG seal correctly? The RA spec (or smoother) for the specific MHG must be met for both the block and head, the machine work must be precisely flat for both the block and head, and the proper torque spec for the fastener used must be applied in the TRSM sequence. Attention to detail on these is what ensures a proper seal." quote from jdub
high psi 1jz said:
From what I've read, it seems like I would be taking a bigger risk with a MHG on an unmachined (even if otherwise fine) block, than with a stocker.
As soon as I think I have something figured out, another kink, lol.
Reccomended from MVP Motorsports & Greddy (this is what it says about 2.0 hg below):
Greddy Metal Head Gasket for 1986-92 Supra - 2.0mm
Part # Gr 13511183
This MHG has a bore of 85mm. This MHG is useful if you have a severely warped head and must do a lot of milling or if you want to change the compression ratio a good amount.
MSRP $227.27
Your Price $193.00
Greddy Metal Head Gasket for 1986-92 Supra - 2.0mm
Part # Gr 13511183
This MHG has a bore of 85mm. This MHG is useful if you have a severely warped head and must do a lot of milling or if you want to change the compression ratio a good amount.
MSRP $227.27
Your Price $193.00
That particular thread was one of the main reasons for selecting the composite HG.
My power goals are modest. Furthermore, I plan on tuning, so it should be running rather well.
We'll see if there are any other new opinions on this. Otherwise, I think I am going to stick to my plan.
New question:
Is there any additional work I can have the machinist do to achieve better flow/power/anything. i.e. anything to the intake or exhaust manifold, valve job, etc.
Hit me with your suggestions...
My power goals are modest. Furthermore, I plan on tuning, so it should be running rather well.
We'll see if there are any other new opinions on this. Otherwise, I think I am going to stick to my plan.
New question:
Is there any additional work I can have the machinist do to achieve better flow/power/anything. i.e. anything to the intake or exhaust manifold, valve job, etc.
Hit me with your suggestions...
See this is where it gets weird, you wanna do (from what I see) a kinda mild buildup but when you get talking into upgrading the head (cams, porting, valves, springs, retainers) I'm not sure what you overall goals are with the car, with some of those mods I listed there, you could be one of the high 57trims out there.
high psi 1jz said:
I'd like to be smart about the modifications I do. I don't want to miss an opportunity (i.e. if there is something the machinist could/should do while he has it).
My goal for this is to get it in the vicinity of 300 rwhp. My other Supras were built and tuned - one had about 330 rwhp (and felt just right to me).
This car is going to be a DD for about 18 months after which I will probably attempt an all out build.
I really do appreciate the point you are making about a MHG. I just can't get the block machined now, and from what I gather, I would just be asking for it if I put one on without prepping.
I am not saying I want to get all of this stuff done, I am asking for opinions as to what is worth it.
just to add to that - I am here looking for advice - so if my goals are unreasonable - school me!!!:icon_razz
If your gonna go all out eventually I think I would put on a good hg, maybe machine the head but not the block since you can't do it at the moment, you will definatley make your 300whp on the 57 trim, but when you go all out you'll be taking the whole motor apart anyway, so I would do the porting and stuff when you go all out, because you'll probably get a better deal sending the machine shop a lot more work.
Boy, aren't the head gasket myths running rampant in this thread or what?
Undertorqued head bolts are the only true statement here. Weak studs? Head bolts man, head bolts, studs aren't factory on the head.
The Toyota gasket has been revised since the cars first came out. They are just fine for any application under ~15 psi. There are people on here who are pushing over 400 HP on the stock HG and ARP hardware with no problems.
Correct.
The supra's engine is a straight six, very long engine
. If it's warped, you run the risk of compromising the integrity of the HG job. Please make sure it's flat.
Correct again.
Modest as in -400 HP? Composite will be just fine if you take the steps that were metioned above.
A mild port and polish would be nice. Get rid of the casting flashes, gasket match the lower and upper intake manifold, intake to head too. DO NOT gasket match the exhaust manifold. The exhaust ports on the head need to be about 1mm or a little more SMALLER than the exhaust manifold's ports. You can gasket match the ports on the exhaust mani, then trace the outline of the gasket on the head, and then port it to about 1mm away from the trace marks all the way around.
high psi 1jz said:
Undertorqued head bolts are the only true statement here. Weak studs? Head bolts man, head bolts, studs aren't factory on the head.
high psi 1jz said:
The Toyota gasket has been revised since the cars first came out. They are just fine for any application under ~15 psi. There are people on here who are pushing over 400 HP on the stock HG and ARP hardware with no problems.
Sawbladz said:
Correct.
high psi 1jz said:
The supra's engine is a straight six, very long engine
. If it's warped, you run the risk of compromising the integrity of the HG job. Please make sure it's flat.Sawbladz said:
Correct again.
dugums said:
Modest as in -400 HP? Composite will be just fine if you take the steps that were metioned above
. A mild port and polish would be nice. Get rid of the casting flashes, gasket match the lower and upper intake manifold, intake to head too. DO NOT gasket match the exhaust manifold. The exhaust ports on the head need to be about 1mm or a little more SMALLER than the exhaust manifold's ports. You can gasket match the ports on the exhaust mani, then trace the outline of the gasket on the head, and then port it to about 1mm away from the trace marks all the way around.
The only porting I would recommend for you would be to port match the intake. You could easily do this yourself and save money.
This is a good thread to read as well. I feel like a teacher assigning homework. lol
http://www.supramania.com/forums/showthread.php?t=33952&highlight=port+match+intake
EDIT:
Also...http://www.supramania.com/forums/showthread.php?t=34310&highlight=port+match+intake
This is a good thread to read as well. I feel like a teacher assigning homework. lol
http://www.supramania.com/forums/showthread.php?t=33952&highlight=port+match+intake
EDIT:
Also...http://www.supramania.com/forums/showthread.php?t=34310&highlight=port+match+intake
Last edited:
That's great - I hadn't found those posts.
I'm going to stick with my choice of HG, and hopefully <<fingers crossed>> everything will be OK.
Again power goal for the build is ~325 whp.
I'm going to stick with my choice of HG, and hopefully <<fingers crossed>> everything will be OK.
Again power goal for the build is ~325 whp.
starscream5000 said:Heh, I should have just copied and pasted that post
I really, really hope I can get the head off today, if not I'll probably have to enlist some professional help, lol..
I'll post some pics to dress up the thread a bit...
starscream5000 said:Heh, I should have just copied and pasted that post
This is what I do when I'm bored...I link people to the stuff they should read and let them deceide for themselves.
I'm basically in the same boat he is. I'm about to rip my car apart for the first time and build my own motor. I've been reading as much as I can find for the past month or so. In a short while I will be posting my own build thread in which I can ask my final questions and get ready to spend money. In the meantime...others can benefit from my ability to use the search
Sawbladz said:This is what I do when I'm bored...I link people to the stuff they should read and let them deceide for themselves.
I'm basically in the same boat he is. I'm about to rip my car apart for the first time and build my own motor. I've been reading as much as I can find for the past month or so. In a short while I will be posting my own build thread in which I can ask my final questions and get ready to spend money. In the meantime...others can benefit from my ability to use the search
There sure is a lot to sift through. I mean, I don't want to feel like I forgot something later... But I don't think I'll ever get anything done if I just don't dive in. Hell, you learn a lot when make mistakes, so I guess I shouldn't be that afraid!!!
So, supra88boy(Brian) heard how much trouble I was getting myself into and came over this afternoon to lend a hand. We (meaning he, lol) got a few more things done in the couple of hours before it got dark.
I can't thank him enough for dealing with me (no experience), my poor facilities and lack of proper tools. We're supposed to work on it tomorrow as well, so hopefully more progress to come.
I can't thank him enough for dealing with me (no experience), my poor facilities and lack of proper tools. We're supposed to work on it tomorrow as well, so hopefully more progress to come.
your welcome bro!!
but were a team!! :drink1:
and we better get that head off tomorrow!:biglaugh:
but were a team!! :drink1:
and we better get that head off tomorrow!:biglaugh: