can you beef the 346 enough?
can you beef the 346 enough? alrighty I've been reading pages on this thread and found alot of great stuff. my question would be, can you make the stock 346 ci alum strong enough to handle 30 plus psi, or would it just crack? strong like forged pistons/rods/crank and anything else. turbo setup BTW thanks for everyones input!!
The Bull
Joined: Jun 2002
Posts: 3,578
Likes: 2
From: Grand Rapids, MI
Already been done on a few cars. No cracking on the couple that I'm aware of. Forged pistons and rods with decent heads and GM stock MLS gaskets. A crank would be a good addition if you plan on racing it or spinning the motor to the moon.
The Bull
Joined: Jun 2002
Posts: 3,578
Likes: 2
From: Grand Rapids, MI
Stock mains are very quality pieces. Stock caps too. Just stud it. 30 Pounds is going to be a function of which turbo setup you run. Some may fall short, in the mid to high 20's. It's all about sizing it right to get to 30 plus pounds. More important that 30 pounds is how well everything works as a part of the overall design. Much more to it than some peak number.
Originally Posted by DERTY
Stock mains are very quality pieces. Stock caps too. Just stud it. 30 Pounds is going to be a function of which turbo setup you run. Some may fall short, in the mid to high 20's. It's all about sizing it right to get to 30 plus pounds. More important that 30 pounds is how well everything works as a part of the overall design. Much more to it than some peak number.
Well said Derty...... i hate it when people say i want to run such and such pounds of boost..... the number doesnt mean crap to me.... its the HP it makes..... set a ET or HP goal and go with that........
The Bull
Joined: Jun 2002
Posts: 3,578
Likes: 2
From: Grand Rapids, MI
Sure. Align hone the mains, clean up the bores, new bearings, etc. Just freshen it up a bit. Or, just get another block all done up ahead of time. Reasonably inexpensive to do given the cost of a full on turbo kit. A 72k mile motor is pretty well seasoned such that all the stresses in it are already relieved, so it makes for a good piece to start from. It's really a function of what's inside of it. Remember a motor that makes 20+ pounds of boost will need a lot more TLC than one that runs 8 pounds. If you don't do that basic TLC it's going to bite you in the ***.
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yea i was just going to say psi doesnt mean sheetttt. I really think you need to ask something like"what psi would i need to run to hit 500rwhp" Im going to stick my neck out and say that 30psi would be around 1,600+hp, this is just a guess since i see lots of people running 15psi and are around 700-900hp range. This all depends on the mods you have also. Note that 30psi would definately be a strip only car, you will need massive upgrades to the fuel system,new rear,new trans, massive intercooler and a ton of other crap which is alot of greenbacks.. Just cause you can run 30psi doesnt mean it has more power than a 20psi motor. This all has to do with the flow of the components used in the motor.
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Verdad Gallardo ok maybe you should have asked(my motor has 72k miles,how much boost can i run with out distroying it). 72k is fine for boost if you keep it under 10psi or around 500-550rwhp. Above that hp most motors go bang, than you need forged pistons/rods.
yeah i'm tryin to have a stronger than nessasery bottom end so that i wont have to mess with it and be sure i wont break anything unessasery. so running big boost (honestly i'm shooting for big boost, north of 800 hp on a full street wieght car) This is why i'm wondering if the alum 346 will be strong enough or should i just go ahead and get a 6.0L iron block. this isnt goin to be a do it all at once thing, it'll be a build as i have spare money to continue project. so i'm wanting to have a bulliet-proof bottom end, do it right the first time! Thanks for both of yalls helps!!
i should have givien you the background first before jumping the horse The Bull
Joined: Jun 2002
Posts: 3,578
Likes: 2
From: Grand Rapids, MI
Well, this car makes a bit over your 800 HP number. Is very streetable. But, doesn't make 30 pounds..... Yet. You should really go after your goals and be satisified with that first. Whatever boost it takes to get you there is a different story. Unless you are starring in the unfast and not so ferocious III where every car makes 60 pounds of boost on a mail order tune. 
http://stenodracing.com/kevin/Kevin_914.wmv
http://stenodracing.com/milan/MM/Ste...et_Driving.wmv
http://stenodracing.com/kevin/Kevin_914.wmv
http://stenodracing.com/milan/MM/Ste...et_Driving.wmv
Originally Posted by sycotic_reject
YES thats the one!! thats what i'm shooting for! that my insperation/goal that i want to replicate. do you know the setup for the car?
**embarrased** it should have clicked when he had the http://www.stenodracing.com link in the sig!!! DERTY, is there a link on the site that has some specs?? I really want to have a similar set up like that!
The Bull
Joined: Jun 2002
Posts: 3,578
Likes: 2
From: Grand Rapids, MI
It's a 347 solid roller, stock crank, Howards rods, Mahle pistons, ported 6.0 truck heads, comp cam 25x/25x .70x/.70x on 115lsa, GM performance carb intake, 5.3 truck manifolds flipped backwards, twin GT-40's, Tial 38mm gates, Rossler TH-400, neil chance converter, Billingsley fab 9". Race weight is a little above 3500#.
If you search FI for Stenod or 1BADWS6 you should see pretty much every progress update that Joe and Kevin have made regarding that car.
If you search FI for Stenod or 1BADWS6 you should see pretty much every progress update that Joe and Kevin have made regarding that car.