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Yeah, I swapped out my 22+ yr old springs with some Comp BBC inner's, just to get proper tension back. Never had an issue with them of course, and I do think it's a common AND cheap upgrade, but as Ian points out, Not for a true higher rev motor. I consider the BBC springs are to the valvetrain...

Never heard of that issue...

Yes, I sanded them down with a dremel. It's the edges of the valve reliefs that we're talking about. Probe made the reliefs oversize in case the customer went with bigger valves. Peoblem is, it leaves a sharp little ridge next to the edge of the piston. Sharp edges= hotspots=pre-ignition=...

Well, like I said- I don't know why people were throwing around lower numbers for the Probes. If stock pistons can handle 400+, I don't see why forged probes couldn't handle some much bigger numbers.

I kinda think that a stock na MkIII will always beat a stock pre-84 MkII, and you're turbo, so... And, you have $3500 in automatic transmission A340 upgrades??? How is that even possible? You know what a $500 A340 upgrade is? An R154 swap. ;)

He kept up because you hit fuel cut 3 or 4 times. That's a HUGE disadvantage. Sounds like a big turbo and no fuel/ air mods is what's limiting you.

What's the fine for getting caught shimmying up a camera pole with a jar of vaseline?

well? I wanna see these pictures.

You're putting Probes in a 700hp buildup? I have Probes, but I wouldn't use them for that hp target. I vaguely remember the consensus during the group buy was that these were intended for the sub-500hp range., but I don't really know why people were arriving at that number. I'm going with...

I'm guessing that rolling the fenders could help a bit for most of your driving.

Nah- judging by the offsets, those are for old-school rwd- RX-7's, 510's, Z-cars, AE-86's, AW11's... Anything from 70's - early 80's.

I would try lowering Fp by maybe 3 or 4 psi, and just see if there's a benefit. My pressure is set ~38psi.

ps- I just noticed that you're using a bigger turbo. I'm on a stock CT(for now).

I think i've mentioned to you before that I have almost the exact same setup as you, right down to blow-thru mode and 560's. I would simply check for boost leaks, as that it the most common cause of FC. I have not pushed my boost past 16psi, but I have yet to hit FC at that level.

I think I read just recently that ferrea makes keepers// locks, and they claim you should use them specifically with their valves.

Do a leak down test. It might isolate the problem to a particular cylinder.

Got it. Out of curiosity, I'll email them about it.

Hey- you were totally right! http://www.horsepowerfreaks.com/performanceparts/Toyota/Supra_MK3/Body/Front_Lip_Spoilers I don't really care so much about the ducting, I just want a new front lip, and everything from shineauto is too low for my taste. Thanks- looks like I'm saving my money for...

Am I correct in thinking that the JDM 89-92 lip came with small brake ducts? And if so, Does anyone know what direction I should look to for sourcing one? PS-! Does anyone have a pic of one? thanks.

Yeah- I think Driftmotion sells it for $36.