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Am I missing something? Use the other head...

It's not often that you come across a decent tech thread on SF, but I think this is pretty good reading: http://www.supraforums.com/forum/showthread.php?t=520811

Loadpoints would help. What you posted isn't a timing map -- its a timing line...

Here is a little more complete list of flowbench numbers from various people over the years (it looks like you quoted Defiant7m). All of these tests were done at 28" but there is still considerable variation in the numbers (though the trends are pretty consistent). Intake: <style>...

If your goals are 500whp or less the 7mgte is hard to beat for value especially since you already have it... Over 600whp, and I'd really start to consider the 2jzgte. I'm not a big fan of the 1jz in the mk3 chassis. Don't get me wrong, it's a fantastic engine, but a 2.5L off boost with a...

Lets think about this. The stock valve springs are able to keep the valves from floating for the stock rpm range, no? So any increase over stock spring pressure will simply be applied back to the cam... This force should be the same (minus any frictional losses) as the extra force required to...

:: tumbleweed ::

My method: fill oil filter before installing it pull efi fuse crank engine for 10 sec, wait 10 sec (let starter cool), crank engine for 10 sec plug efi fuse back in start car up, let oil pressure come up. while car is idling, get out and look for any leaks get back in car, and drive gently...

right in the stickies lol ::hang:: That's so weird that Greddy, HKS and Titan would have 1.2mm's as the default...

Where in the TSRM is it? I looked through the cylinder head section and didn't see anything. And I've been out of the supra game for the last few years, but I thought the stock hg was 1.2mm when compressed?

The TSRM make no mention (as far as I'm aware) of machining the head at all. But you should be fine having made 2 passes on it. As far as MHG thickness -- 1.2mm is stock (.047in) If you've machined a total of .032 from the block and head, you'd want a 2.0mm HG to return things back to stock...

Not really. Yes, a stiffer spring will require more force to push down -- but it also will push back up (on the cam) with more force. There will be slight frictional losses, of course, but essentially the spring rate change will have negligible parasitic losses.

I didn't want to further hijack HKS_TRD's build thread ( http://www.supramania.com/forums/showthread.php?t=68023 ) so I'll try to move the discussion here. When your car overheats, there is a good chance the cylinder head will warp. This generally happens because of uneven temperatures across...

yeowch! What springs are those?

^ the angle on the wastegate plumbing looks like a recipe for creep (prob why there are two pipes)

You're pretty much right: assuming the same valves/cams, a lighter valvetrain probably wouldn't appreciably increase power at an existing rpm unless you were already experiencing float. It would slightly decrease the effort required to turn the cams (since less force would be required to...

Saw this posted on celicasupra and thought this would be good info to have in the SM archives... Cliffs: BC 1mm oversized valves are ~1gram lighter each (~24 grams lighter for set) BC springs/retainers are ~8 grams lighter each (~192 grams lighter for the set) So the 1mm oversized BC...

I've offered a spare 7mgte longblock to Duane if he makes it down, so if he can't make it I doubt it'll be for want of supplies...

I'd also add to Grimjack's post to check the torque (and retorque if necessary) the headbolts. Mk3's do have a headgasket issue, so I wouldn't start upping the power until that is addressed.

It can be done, but rebuilds are time consuming and expensive. Forged pistons are cheap insurance...