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- #101
Hopefully today or tomorrow.
Flights 97 Ex build thread
- Thread starter Flightmaster127
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- #102
Disappointingly low power output. Come to find out that my compression ratio is way too low. Looking at a different set of pistons. If you look at the graph though the curves are at least pretty solid and the torque curve is pretty flat. Wound up making 10psi of boost on the dyno.
bootyluvr
Well-Known Member
109/105
Sent from my Moto G (4) using Tapatalk
Sent from my Moto G (4) using Tapatalk
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- #104
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The torque curve is really nice. Power wise it doesn't seem to make a lot of sense with 10psi. They think it's entirely due to the pistons?
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- #105
Yeah I talked with Jeff at Evans tuning and he said the compression ratio was way to low (7.8:1) which is why the output is so low. Stock was 9.6:1 and he recommended 10:1 if I change pistons.
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- #106
So having been completley dissatisfied with the results I got i did some financial wizardry I have a box full of needed parts and fluids waiting to build this engine again. Just waiting for the pistons to be milled and mailed to me then i can get started. My backs gonna be killing me cause im doing all of this with the engine still in the car.
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- #107
Parts finally showed up. Tear down may start next week if everything goes as planned.
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- #108
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Did you go with 10:1?
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- #109
Piston specs are for 10.5:1 but using some online information with the piston specs it's should come out to 10:1 with my headgasket choice.
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- #111
Let the tear down begin.
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- #112
Tear down is now complete.
Unfortunately I found some signs of wear I didn't like.
Gonna have to flush all the oil passages, get another new set of bearings (main and rod) and then bust out the plastigauge again. Wasn't prepared for the extra work but honestly at this point with this car I'm not even surprised.
Unfortunately I found some signs of wear I didn't like.
Gonna have to flush all the oil passages, get another new set of bearings (main and rod) and then bust out the plastigauge again. Wasn't prepared for the extra work but honestly at this point with this car I'm not even surprised.
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- #114
Not a scratch thankfully. This is the second time i've eaten a set of bearings. I'm going to flush all the oil passages in the crank and then plastigauge every lobe when in install the new bearings to make sure everything is still in spec. I have a feeling that because i ran the car for so long on a really rich tune i may have lost some lubrication to fuel soak which caused this issue. Crazy part is there were no signs of it, oil pressure was spot on, and no unusual noises.
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- #115
Progress has been made.
Nix
Jötunn Moderator
Strong work man!
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- #117
Literally waiting for a single arp washer to put the head back on. I somehow managed to lose one while taking it off. Searched everywhere but that **** must be in another dimension cause it's nowhere to be found.
Nix
Jötunn Moderator
Ah the joys of wrenching. I love when something like that happens and it's the only car you have. Small job before going to work? No problem!
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- #119
That's why I have another car honestly. All the one hour jobs that turned into one day jobs on this thing were killing me.
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- #120
Alive at last. Took it out for a break in spin and also gave the car a quick wash.