afida15

hey guys, i just now recently found out about putting a 383 crank in a 305 and i would like to try it. i already have a block that doesnt need boring and its .030 over, ive got a set of pistons that are the correct size and there flat tops with 4 valve reliefs now my question is what rods do i need to use to? i can get the crank from scat 3.75 stroke the 9000 series the one thats already machined for 305/350 journals for $116.00 dollars threw my work Advance auto parts. is there any block machine work needed to fit that crank and with what rod. i plan on using my set of 601 heads on it also. thanks guys

Apeiron

If you're using a 305 piston, you need a 5.565" rod from a 400. The block will probably need clearancing around the oil pan rails. and the bottoms of the cylinders. Plan on having the assembly balanced.

afida15

alright thank you, i apriciate you not tellin me that im wastin my money on a 305 that could be spent on a 350. Also what would the cubes be with the .030 over pistons and 3.75 crank wtih 5.565 rods?

Apeiron

335

igotta355z28

iTrader: (1)

its not as much of a waste of money since u already have a block and pistons. Its different wich isnt always good, but hell ill keep my eye on this thread it might be intresting.........

Apeiron

"I want to try it" is a more valid reason than most for building a 335.

afida15

Well right now im basically just tryin to do my research and see what parts i need and what parts i can use for sure. so i can set all my things im using aside so they dont get trashed. I've got the block, pistons, heads, intake just need a set of 400 rods. does anyone have any 400 rods that they would be willing to trade for a Rear compartment cover witht he bose amps and stuff on it with the lock. its in my 89 Iroc with Grey carpet. let me know guys

igotta355z28

iTrader: (1)

i would definately agree... way better then "im working with what i have" when a 350 block can be had for 100 bucks or less at any junkyard...........
so if u have anymore questions or want to run by ideas im very intrested, i see this build as an experiment and not someone just wanting to be different and stuborn....

afida15

yeah im about bolt my 350 with dome pistons together once the block gets back from the machine shop for cam bearings and my pistons get pressed. but onto the 305 again. should i go with a cam meant for down low power or a cam with a more higher rpm range?thanks for the help so far

igotta355z28

iTrader: (1)

i think more low to mid range cam, i think this will be more of a low end torque engine then anything, i sent an email to my buddy to see if he has some 400 rods laying around i can have, if hes got some ill pick them up and u can have them for the cost of shippin......

afida15

alright thanks dude.

five7kid

iTrader: (14)

"I want to try it" may be a more valid reason than most for building a 305, but it's still a sorry use of performance $'s.

If you want to use the 305 parts you have to build an engine, sell them and use the money on a 350. You may not want to hear it, but it's still true.

igotta355z28

iTrader: (1)

haha this is why im not paying for anything, but ill sure help in any way that doesnt cost me anything....

89_RS

I'm planning to the same thing. The actual engine displacement after boring and stroking is 334 (will be more with bigger pistons, but its not recommended to go more than .030" over stock bore). And for stroking a 305 you can reuse the stock 5.7" rods, but its not advisable.

And before I get flamed for it, I know what I'm getting into here, its costs a ton, isn't advisable because it costs too much, involves alot more than just a rotating assembly, ect., ect.

First off, if you don't need an all forged setup enginekits.com makes a stroker kit for the 305 that they sell for $650. Thats the whole thing, pistons, rods, crank, ect. But then you need to have the assembly balanced, the block clearanced to accept a 3.75" stroke, and all the other required machining in order to install it in the block. Link:

https://shop.enginekits.com/osb/itemdetails.cfm?ID=341

But if you're like me and want to have an all forged setup, it'll be around $2000 for all the parts before machining. You'll need .030" over pistons, 5.7" rods, and a crank with a 3.75" stroke. Links:

http://store.summitracing.com/partde...3&autoview=sku
http://store.summitracing.com/partde...1&autoview=sku
http://store.summitracing.com/partde...N&autoview=sku

Now while this sounds good, you won't get much out of it unless you port the hell out of your stock heads or go to aftermarket heads. Plus, you'll need to upgrade the exhaust, fuel delivery, intake, tune, cam, valvetrain, and pretty much everything else to see a decent return on the investment in stroking a 305. According to Desktop Dyno 2003, my 334 will be making 427fwhp and 408fwtq.

I've also linked a parts list for a good idea of price and part info. Hope this helps.

https://www.thirdgen.org/forums/atta...troker.xls.txt

Apeiron

That's why I said a "more valid" reason instead of a "good reason".

Apeiron

Which is $181 more than the 383 kit. Even after buying a bare 350 block, you've not only made more power with the 383, you've actually saved money, too.

89_RS

Yep, boring and stroking a 305 isn't cheap no matter how you cut it. But for me, the fact that very few have done is why I want to do it. It'll be fun, but it won't be cheap.

igotta355z28

iTrader: (1)

i cant justify spending alot of money on a 305 just to be different, its still wont have much power so in the end its like being the smartest kid with down syndrome, now what afida15 is doing is low buck using mostly parts he already has and a cpl hundred bucks worth of others to put together a lil motor...

o and afida, is your block a roller block cause i was thinking a good used LT1 cam might work pretty good in this build, and go along with the cheap aspect.......

afida15

yeah dude i have two 305 blocks, one is a roller block and one is a flat tappet block. the roller block isnt bored though so i would have to get it bored but i was thinking about using that and using like a lt1 cam or a lt4 hot cam if i did use that block. there is a guy up at car quest that likes trading parts for work so i might be able to trade him out with parts to bore that roller block.

89_RS

I don't know about you, but when the LS3 is making 425fwhp and 422fwtq with 376ci, 427fwhp and 408fwtq from an LO3 with 334ci seems pretty dang powerful for a motor that is 20 plus years old (according to Desktop Dyno 2003). That coupled with the fact that I'll have a massive amount of torque under the curve, I'll gladly take my LO3 with 334ci.

As for the smartest kid with Down Syndrome comment, I resent that because I know a few kids that are like that and they could make a lot of people, you and me included, look really stupid. Just because someone Down Syndrome doesn't mean they're useless to society.

afida15:

You're demonstrating some excellent scavenging abilities. I'd be very interested to see how your 305 turns out.

igotta355z28

iTrader: (1)

ayes lets compare a built to hell and back 305 to a bone stock ls3. that u know with a cam swap and tune will make 500hp and is just getting warmed up. one is at the extreme of it abilities and one is just getting started, good comparison. and on the down syndrome comment, sue me the world is tough place grow a thicker skin...... and afida my buddy and me have stripped down a few lt1s and he might still have a cam ill check he owes me alot, lol.....

afida15

alright, well i would like to use the roller block but the guy i got it from had it out in the rain and ive let it sit out in the rain to because i got it for 50 bucks with all the serpentine accessorys on it cuase it came out of a 89 firebird he said and i needed the serpentine setup for my 89 iroc so thats why i have it. it still has the cam and lifters in it and the spider tray? to hold in the lifters. i may just stick with the flat tappet block but im not sure. im hoping to start on this once i get my 350 done and get my front body parts for my iroc and everything. can anyone run a desk top dyno for me? .030 305 flat tops with 4 valve reliefs with 5.565 rods and 601 heads and lt1 cam and 3.75 inch stroke crank? i need to find me a copy of dest top dyno for cheap. been lookin on the net for a place to download it but cant seem to find the whole version.

igotta355z28

iTrader: (1)

pm sent

89_RS

I know it wasn't the best of comparisons, but I was just trying to point out that the 305 can make a decent amount of power. And for your info thats not a bone stock LS3. Orginally, the LS3 made 410fwhp and 408fwtq, but GM bumped up its hp with a slightly better tune for the Camaro and Corvette because the buyers couldn't understand what was so different about an LS3 at 410fwhp vs an LS2 at 400fwhp. And you can actually buy a crate LS3 with 480fwhp. Or you can skip the LS3 crate and get an LSx 376 (same displacement as the LS3) crate motor with over 500fwhp. And believe me, for all your "the 350 is better" statements, a built to hell and back 350 will never touch a mildly hot LSx series engine. Those guys are doing somethings with the LSx engines that make what we do look like childs play.

As for me needing to grow up, maybe its you who should take some of your own advice. You couldn't make a constructively critical comment on my statement without trying to insult me at the same time. Very immature if you ask me.

igotta355z28

iTrader: (1)

hey bud chill didnt say grow up said grow a thicker skin, and i never said a 350 is better then any gen III or Gen IV motor, your preaching to the choir i guess u didnt notice my stats on the side I HAVE A GEN III 6.0 BUILD!!!

afida15

alright thanks for the help so far guys but ive gotta run to the shop and then go to work but thanks.

89_RS

Point taken. I do tend to have a rather thick skin, but comments like that just get my goat sometimes. And yes, I didn't notice that you had an LS motor. I was going by your user name. Sorry for the confusion. Is you Gen III 6.0 and LS2 or an L92?

igotta355z28

iTrader: (1)

yeah username is from when i first started here back with my old 86 Z28, i have an 01 LQ4 with aluminum 317 heads, the build is not complete and a L92 is a 6.2L motor......

89_RS

Ahh, ok. I was thinking of the L98. I've head a lot of people using L92 heads on LS motors with great success.

igotta355z28

iTrader: (1)

yes l92 heads are really good for stock heads, but u can only use them on 6.0 and larger motors cuase they have to have a 4 inch bore for the valves to clear so the LS1,LS6 boys and 5.3 guys are outta luck

89_RS

Thanks, didn't know that.

ljnowell

Well, I hope I dont insult your political correctness with this, but that is retarded. A built to hell and back 350 vs a mild ls? You obviously have no idea whatsoever about what a 350 chevy is capable of. Period.

89_RS

Mildly Hot LSx.

1200rwhp and 1000rwtq out of a 350. Heard of a few people running that in a Vette before. And IIRC they use the 350 block in top fuel dragsters (again if IIRC 3000hp). But for applications like the Vette, there are a few of those Mildly Hot LSx motors out there that are already there or higher.

And believe me I'm not Politically Correct.

ljnowell

Mildly hot isnt 1200rwhp. Sorry. In all honesty, the ls and older style 350 are really capable of similar power. Its how its made. The LS makes higher power with its stock components. For example its heads are capable of much more. However, when it comes to power per dollar it is at a disadvantage.

afida15

hey igotta355z28 did you get my pm, any chance you can send me that email tonight?

igotta355z28

iTrader: (1)

yeah i tried emailin ya but the file was too big, do u have yahoo messenger? if so i can send it to u through that.....if so my sn is igotta355z28 just like here....

afida15

alright, my sn is yamahayz250crazy

rusty vango

on a engine meant for street use, even with ported heads and balancing and blueprinting you need not spin it faster than 6000 rpm, so go for a cam that makes gobs of low end torque. you will have a grin factor in excess of 10. enjoy and f#$% a bunch of nay sayers!!

88FormulaF_Bomb

iTrader: (1)

zombie thread.... lets put it back to sleep


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