So presumably a blown head gasket, and a 150000 mile engine for a track car, i embarked on an engine rebuild(assembly by me). No idea what ive done, or how well ive done it so i welcome feedback, criticism, whatever. I ended up typing a full write up of the process, etc, but its excessively lengthy and probably too much to post. Ill get some pics if theres interest, i have hundreds! But the long story short is essentially a stock 11.5:1 compression. Stock cams. Stock intake. I have SS V1 catless headers, Catless ss section 1, and BW Race from there back. I have had an epic race tune prior to this and underdrive pulleys. Components include the Lang rod bearing journal widening treatement, wpc coated rod bearings and wrist pins, king mains 87.25 mm Carrillo pistons and their lightweight rods, which lightened the rotating assembly by 3.2lbs if i remember correctly. The bore was increased to 87.25 which by my calculations was about 30cc of increased displacement.
Many hours of work later, the engine fired up immediately. Let it reach temperature, and then off to cool. Took it to the dyno for break in today with several staged increasing pulls, and a final power run. Very few hiccups, a low engine oil light, which i corrected, one over heat moment on the final pulls to redline, likely an air pocket in the coolant system i was told. some white/blue smoke initially which then cleared, perhaps after the rings improved their seal. After this we did the max power runs at 326.92. I really dont know if this is good or not for my mods and what i put in. I will say thats an expensive as hell 50hp gain from stock!!! But im happy to have learned a lot on the build, some things i could do better if i ever have the need or desire to do this again, and im happy i have put together a more powerful engine than i took out. The main goal here was to improve the reliability with stronger parts and some upgrades to the design as in the rod bearing widening. Also Im elated to not have an exploded engine as of yet!!!
Let me know what you all think of the power numbers for this...i plan to do 288/280 cams in the future and finally a dyno tune with epic once those are in. The calculation given a driveline loss from stock 333 to ~276 is about 18% and that calculates out to 394hp at the crank!!! Fairly pleased with that#
I have yet to do a follow up compression and leak down so ill add those numbers once i get them.
Many hours of work later, the engine fired up immediately. Let it reach temperature, and then off to cool. Took it to the dyno for break in today with several staged increasing pulls, and a final power run. Very few hiccups, a low engine oil light, which i corrected, one over heat moment on the final pulls to redline, likely an air pocket in the coolant system i was told. some white/blue smoke initially which then cleared, perhaps after the rings improved their seal. After this we did the max power runs at 326.92. I really dont know if this is good or not for my mods and what i put in. I will say thats an expensive as hell 50hp gain from stock!!! But im happy to have learned a lot on the build, some things i could do better if i ever have the need or desire to do this again, and im happy i have put together a more powerful engine than i took out. The main goal here was to improve the reliability with stronger parts and some upgrades to the design as in the rod bearing widening. Also Im elated to not have an exploded engine as of yet!!!
Let me know what you all think of the power numbers for this...i plan to do 288/280 cams in the future and finally a dyno tune with epic once those are in. The calculation given a driveline loss from stock 333 to ~276 is about 18% and that calculates out to 394hp at the crank!!! Fairly pleased with that#
I have yet to do a follow up compression and leak down so ill add those numbers once i get them.
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