60K I'd be going the next size bore without a second thought if it's a performance build, if it's a low hp DD type thing I'd measure first before deciding on a course of action.
Uses of a Torque Plate?
- Thread starter MA70witBoost
- Start date
4U2QUIK
1UZFE SWAP DUDE!!!
and a note on that, don't just check in one place if you mic the bore. Check it several places both rotationally and vertically.
IJ.;1559930 said:
whats your opinion of a low hp DD? I was concidering from 400-500hp daily driven.
4U2QUIK;1559943 said:
knew about checking it in different depths in the cylinder but hadn't thought about rotationally. Good tip.
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IJ.;1560076 said:
Just out of curiosity, why go to the next bore size? Befor me it was supposedly running w/o a boost controller at stock boost and no bolt ons for the motor. Motor ran great aside from the valve stem seal leak it started off with.
Going to try to get cylinder #1 measured this afternooon. Get a bit of an idea atleast how that cylinder is doing. Measure both the cylinder and piston? So I pretty much have to finish pulling the short block and dissassemble?
After 60K miles the holes won't be round or true, just because "motor ran great" doesn't mean it was in any condition to build on as a good reliable base.
I don't build dyno queens or one hit wonders, I run my cars exactly how they're dyno'd and expect them to live day in day out at those settings.
Typical dyno session for me is drive in hook up the Dyno WB, Knock sensor/ears and Map sensor do the tuning unhook it all and drive home, no micky mouse BS race fuel/special settings.
Having said that if anything isn't perfect you'll soon grenade it, there's a HUGE difference in an engine that see's a few passes down the strip each year set on kill to one that get's hammered at full boost and taken to redline each time it's driven on the street then can still blast across the country and make it back.
Even at your proposed "low HP level" you're more than doubling the engines output so things need to be right.
(SM is littered with grenades as people seem to have this idea that 400+rwhp is "easy" and just a matter of bolting on a big fuck off Turbo and cranking in the boost)
I don't build dyno queens or one hit wonders, I run my cars exactly how they're dyno'd and expect them to live day in day out at those settings.
Typical dyno session for me is drive in hook up the Dyno WB, Knock sensor/ears and Map sensor do the tuning unhook it all and drive home, no micky mouse BS race fuel/special settings.
Having said that if anything isn't perfect you'll soon grenade it, there's a HUGE difference in an engine that see's a few passes down the strip each year set on kill to one that get's hammered at full boost and taken to redline each time it's driven on the street then can still blast across the country and make it back.
Even at your proposed "low HP level" you're more than doubling the engines output so things need to be right.
(SM is littered with grenades as people seem to have this idea that 400+rwhp is "easy" and just a matter of bolting on a big fuck off Turbo and cranking in the boost)
IJ.;1560160 said:
not arguing with you Ian. I know that the 7M has to be perfect. Not fond of having to over bore again. This means new pistons? Why do I have to Overbore? Possibilities of the cylinders not being straight? Im just trying to understand. I guess I shoulda reworded my previouse reply...
It's cool I know you're not but I just wanted to make my reasoning perfectly clear, this is just the way I do things as I'm not keen on failure.
"If" the Bores all measure up fine round and not tapered you're good to go but the chances of that are slim at best.
You need to measure each hole top/middle/bottom and 12 o'clock, 3 and 4.30 (with 12 being the front)
"If" the Bores all measure up fine round and not tapered you're good to go but the chances of that are slim at best.
You need to measure each hole top/middle/bottom and 12 o'clock, 3 and 4.30 (with 12 being the front)
4U2QUIK
1UZFE SWAP DUDE!!!
I just take it as a given that in a used performance engine 1 of the 36 measurements is going to be out of spec4U2QUIK;1560226 said:
