Will it hold 25lbs?
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Will it hold 25lbs? Im going to be hitting the dyno next weekend and was wondering if you guys thought my junk would hold together at 25lbs.
Im running a 355 with splayed 4 bolt billet center mains, outers are 2 bolt, cola crank, eagle H beams 5.7 rods, Mahle -26cc 2618 pistons, LE3 heads, ARP head and main studs, Felpro head gasket. Ill be using either VP113 or C16and tuning with HPtuners on an EFI connection setup.
Im pretty sure itll hold 20lbs but will it hold 25?
Itll also be ran through an A2W with ice in the tank, should be a max of 80degree IAT's
Im running a 355 with splayed 4 bolt billet center mains, outers are 2 bolt, cola crank, eagle H beams 5.7 rods, Mahle -26cc 2618 pistons, LE3 heads, ARP head and main studs, Felpro head gasket. Ill be using either VP113 or C16and tuning with HPtuners on an EFI connection setup.
Im pretty sure itll hold 20lbs but will it hold 25?
Itll also be ran through an A2W with ice in the tank, should be a max of 80degree IAT's
Im jealous of all the room a LT1 in a 3rd gen :/
25 pounds is a LOT of boost on a v8 I'd play it safe and do what within reason first seems like it will be putting out a lot of power even at 20 which is also a lot of boost
25 pounds is a LOT of boost on a v8 I'd play it safe and do what within reason first seems like it will be putting out a lot of power even at 20 which is also a lot of boost
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The engine bay is decieving, you have to "make" that room, its hidden pretty well by alot of factory parts... Im going to start at 10 and work up from there. I will more than likely be running C16 to be as safe as possible. I dont "want" to blow it up but im not afraid to lean on it. If it cant make 800 and hold together then ill just have to get into an LSx...
Are those Felpro's a MLS gasket?
When starting to run over 20lbs of boost in about any application there are a few things to start to worry about. Head gaskets, head studs, piston ring lands, valve springs, and wrist pins.
When starting to run over 20lbs of boost in about any application there are a few things to start to worry about. Head gaskets, head studs, piston ring lands, valve springs, and wrist pins.
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Heres a couple pics of the pistons... they arent the best pistons out there but ive been assured they should not be the weak point... who knows at this point tho....
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Yup thats pretty much what im thinking. Im figuring 800hp is probably the limit the short block can handle So I guess whatever it takes to get there is what it will see lol. The entire car is hand built by me and my Tater Shack crew. There isnt a single stock piece left in it....
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Man honestly unless your just wanting high dyno numbers you'll probly never encounter someone on the street that could hang with you if your at or around 20psi... much less put it to use on the highway... and I think at 20psi your going to pull the covers off alot of naked parts... that's alot of boost. hell just getting to 14psi is a big jump.no reason for lsx,You've long surpassed the advantages of one. hell put in a old 292 gm straight six and boost it to 30lbs... someday I'll do that in a second gen. 
good luck... Tune it at 20 and learn to drive it honestly you'll find a oak tree at 25psi
good luck... Tune it at 20 and learn to drive it honestly you'll find a oak tree at 25psi 
They go to the drag strip also... I know of a few cars around our area that would like to play with him a little.
Came along nice... You got a build thread on tnfbody?
Came along nice... You got a build thread on tnfbody?
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you seem to know ur stuff, but what is the fuel setup for that. Make sure you have enough fuel to feed that. are your internals all forged? What kind of valve covers that i like the c/f.
Honestly, I don't think you'll have any problems at 25psi. You're running good gas, run a cold non-projected plug and keep the timing low and you won't have any problems. If you break a piston or blow a headgasket at this level, the build or the rest of the tune is screwed up.
Anyone remember Sleeperz28? He had was getting 1000rwhp though his LT1 a decade ago. And the Speedinc, guy was also pushing big HP though his turbo LT1 miler a few years back.
Anyone remember Sleeperz28? He had was getting 1000rwhp though his LT1 a decade ago. And the Speedinc, guy was also pushing big HP though his turbo LT1 miler a few years back.
The engine bay is decieving, you have to "make" that room, its hidden pretty well by alot of factory parts... Im going to start at 10 and work up from there. I will more than likely be running C16 to be as safe as possible. I dont "want" to blow it up but im not afraid to lean on it. If it cant make 800 and hold together then ill just have to get into an LSx...
at that boost level you're taking alot of chances........
the pistons have a couple of spots to be concerened about possibly.....first the thickness of the head of the piston in the dish.....to thin will reduce its ability to dissapate heat and promote distortion and cracking.......also the top ring to piston top distance.....may blower pistons including diamond move the ring pakage down in order to increase this material space.....intern making the ring package must more strong and stable...........
also.......at 25lbs of boost the head studs and gaskets had better be absolutly perfect as well as the deck surface and the head mating surface.........
personally id be worried about the eagle rods at that horsepower level.......that thing should exceede 1000hp on that kind of boos and i dont see those rods holding up espically if you decide to rev it a bit........
also id run atleast C16 in it to prevent detonation......
one way or another you are taking a chance at that kind of boost...........
i know many of the things i mentioned there may seem like overkill but 25lbs of boost IS over kill lol
good luck !
the pistons have a couple of spots to be concerened about possibly.....first the thickness of the head of the piston in the dish.....to thin will reduce its ability to dissapate heat and promote distortion and cracking.......also the top ring to piston top distance.....may blower pistons including diamond move the ring pakage down in order to increase this material space.....intern making the ring package must more strong and stable...........
also.......at 25lbs of boost the head studs and gaskets had better be absolutly perfect as well as the deck surface and the head mating surface.........
personally id be worried about the eagle rods at that horsepower level.......that thing should exceede 1000hp on that kind of boos and i dont see those rods holding up espically if you decide to rev it a bit........
also id run atleast C16 in it to prevent detonation......
one way or another you are taking a chance at that kind of boost...........
i know many of the things i mentioned there may seem like overkill but 25lbs of boost IS over kill lol
good luck !
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Honestly, I don't think you'll have any problems at 25psi. You're running good gas, run a cold non-projected plug and keep the timing low and you won't have any problems. If you break a piston or blow a headgasket at this level, the build or the rest of the tune is screwed up.
Ya Im going to run a br8ef if its to cold Ill try a br7ef.
Anyone remember Sleeperz28? He had was getting 1000rwhp though his LT1 a decade ago. And the Speedinc, guy was also pushing big HP though his turbo LT1 miler a few years back.
Ya Im going to run a br8ef if its to cold Ill try a br7ef.
Anyone remember Sleeperz28? He had was getting 1000rwhp though his LT1 a decade ago. And the Speedinc, guy was also pushing big HP though his turbo LT1 miler a few years back.
Lol If only you could weld aluminum to cast iron
Last edited by Tricked-Out-Toy; Jul 22, 2011 at 08:45 AM.
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at that boost level you're taking alot of chances........
the pistons have a couple of spots to be concerened about possibly.....first the thickness of the head of the piston in the dish.....to thin will reduce its ability to dissapate heat and promote distortion and cracking.......also the top ring to piston top distance.....may blower pistons including diamond move the ring pakage down in order to increase this material space.....intern making the ring package must more strong and stable...........
also.......at 25lbs of boost the head studs and gaskets had better be absolutly perfect as well as the deck surface and the head mating surface.........
personally id be worried about the eagle rods at that horsepower level.......that thing should exceede 1000hp on that kind of boos and i dont see those rods holding up espically if you decide to rev it a bit........
also id run atleast C16 in it to prevent detonation......
one way or another you are taking a chance at that kind of boost...........
i know many of the things i mentioned there may seem like overkill but 25lbs of boost IS over kill lol
good luck !
the pistons have a couple of spots to be concerened about possibly.....first the thickness of the head of the piston in the dish.....to thin will reduce its ability to dissapate heat and promote distortion and cracking.......also the top ring to piston top distance.....may blower pistons including diamond move the ring pakage down in order to increase this material space.....intern making the ring package must more strong and stable...........
also.......at 25lbs of boost the head studs and gaskets had better be absolutly perfect as well as the deck surface and the head mating surface.........
personally id be worried about the eagle rods at that horsepower level.......that thing should exceede 1000hp on that kind of boos and i dont see those rods holding up espically if you decide to rev it a bit........
also id run atleast C16 in it to prevent detonation......
one way or another you are taking a chance at that kind of boost...........
i know many of the things i mentioned there may seem like overkill but 25lbs of boost IS over kill lol
good luck !