i found this stroker kit today and i dont know if i should get it anyone got it? or know anything about it pls help!!

http://www.rpmmachine.com/305-chevro...roker-sb.shtmlhttp://www.rpmmachine.com/305-chevro...roker-sb.shtml

 

Would someone really spend that much money to gain 7 cubes?

 

... 7 cubic inches? Unless you have to stay under some engine size limit for a racing class, whats the point?

 

i was looking for the 355 kit but i cant find it got the link? and the 312 kit says it makes 750hp but i find that hard to believe suggestions ?

 

If you want to go fast, don't start with a 305 block.

 

because people think "stroker" means huge gains in hp even if its just 7 cubes

 

750 HP out a 312 cubes...not unless its running a CRAZY amount of forced induction

 

It doesn't say the kit will produce 750hp.
The parts they sell are rated to handle up to 750hp, if you buy the high end kit.

 

Why would you waste your time and $$$ on that? Start w/ a 350 and go from there, or even a newer dartblock....

 

The stroker kit is a forged crankshaft with a .02" longer stroke. Save your money and just deck the block to 9.00" (.025 less than stock)

 

You can build a 312 just by boring .040" over and keeping stock crank.

That kit has some nice parts in it, depending on what you get but your limiting your performance with the small bore and standard 23 deg heads. Unless you spray alot of nitrous, or are trying for a max effort n/a motor with high rpms for fun or for a racing class, or building a boosted project, you dont need a new crank/forged pistons etc.

You can find a 350 block and put the rotating kit towards that. Same price, just different size pistons

 

the only problem with getting a 350 is i'm low on cash and i cant find a 350 for sale in my area but i have to fix other things before i get another engine but if anyone has a 350 they would sell me for a reasonable price around charlestown indiana then let me know thanks for the advice everybody. also if anyone knows what exhaust system i should get to get a loud badass grunge sound let me know

 

lol 750 hp

thats a really small/pointless growth and contrary to what a lot of people repeat after seeing other people say it, the 305s displacement is not its main shortcoming, look at all the **** ford guys have done with 5.0s or for that matter any european sportscar. You could spend that money on upgrades that open up the 305 and are comaptible with 350s/383s in case you ever move up. 312 would just be a cool number.

 

Yes sir, not even a 5.0. Just a single cam 2 valve little 4.6. I think I'm making just below 300 HP at the crank N/A with an email tune, CAI, and exhaust. I'll be making up to 450 at the crank once my Vortech is on. Could make up to 500 at the crank on the stock short block, with stock heads if I run a front mount intercooler with some decent blower cams.

Gonna do it way better when I get working on the IROC. Mustang has a small engine and boost is on the way. The IROC will have a big engine with boost eventually.

But yeah, this 305 stuff is pointless. Thread title should just be "350 to 383 or 388 stroker???" if he wants some decent power.

 

if you need a 350 block... you can have one of my 350 blocks(bare except cam bearings and freeze plugs) for 20$ if you come pick it up
buuut i'm sure the gas to get here would cost more than the summit blocks... regardless

one is a 2 bolt 1 piece rear main from a 92 van nothing was wrong with it

the other is a 4 bolt main 2 pc from an 81 K20 needs to be align bored(spun 1 and 8) but i have a chrome oil pan for it that you can have

 

The bore on the 305 is way too narrow, for serious power. The ford 302 has a 4" bore, which is easier to work with.

 

dont waste any money with those 305s. they are just boat anchors. 305 is no match vs a 350. torque wins races and thats the biggest difference between the two

 

+1 The displacement is not the problem, it's the tiny bore size.

 

A 312 is not a stroker...it's a .40 over 305. That said that kit is a waste of money since you are not "stroking" anything. The 334 stroker kit is a REAL stroker kit and is actually pretty cool. Theres a guy that lives around me that did it in his TPI IROC and was running 13.2's all motor on stock heads with the TPI set up still.

Honestly, I have played with 305's. Fun little engines and you can get decent power out of them. If you were to do anything, use your stock 305 and put a cam in it, some headers, and an exhaust. Then save for a 350. You will never make power as easily as you could with a 350 honestly. My brother put 1700$ into a stock 350 shortblock and is making around 440 HP at the flywheel. Theres no replacement for displacement.

 

go to the junkyard, do a little research on what cars and vins had 350s pull one that seems like itll be good for cheap, if you can hear it run even better, but from a jy you know its complete, and you can modify some alsready factory parts to strengthen them, it would aslo be cheaper. that is no stroker kit, .02 isnt much of any gain, and 750 is what the parts are rated at, cam a 350 and better intake system and your already making better power

 

yes the bore size is the limiting factor. same stroke as a 350 already but a small bore size and cant be bored toa 350. you can run a stroker crank and get a 330 out of this. but for the same cost you can do a 350 built...doesnt make sense to me. and overboring doesnt really do much. I always do the minimum i can possibly do on the overbore as .030 over only add 5 or 6 cubic inches...

 

save the money and buy a longblock 5.7 roller with vortec heads

 

right now im working on one of those old 300 hp 307's to see if it was true that they made one hp per cubic inch in some of them, but its out of curiosity, then im building a 400. so there really is no replacement for displacement

 

That's a function of airflow, not displacement. One gross HP/cu-in isn't even a challenge.

 

where do u live and could you ship it?

 

Summit 383 block isnt a bad deal...

Bore size is a limiting factor with 23 deg heads...however if you look at LS1, they have a small bore size 3.898" but make huge numbers on stock heads. Stock heads may only "flow" 250cfm on a bench when sbc 23 deg heads of similar "cc" size may flow 300cfm and have much larger valves, they still have a hard time outpowering a stock head 346" LS1 car. LS heads with the 15 deg or so valve angle kills 23deg sbc stuff.

Even some 4.125" bore SBC 400's have a hard time doing what a big cammed cam race effort stock head 346" LS1 can do. There are many cam only cars in the 10's.

Even GM's tiny 4.8L with a 3.78" bore will make big numbers. I've seen a local kid cam/LS6 intake a 4.8 and put in a 95 Z28 camaro and run low 12's at 115mph! Thats not gonna happen with a 305 SBC....

The valve angle in the heads really helps flow, especially with the smaller bores. You just wont find those heads available for a 305 sbc bore size....

 

lets not argue about it, ut in 1970 that was a pretty big feat or such a small displacement, i dont think our cars from factory could do that

 

Check the stats on the 1957 Corvette with the fuel-injected 283. 1 gross HP/cubic-inch.

By making your goal power per volume, you've removed displacement as a factor. A model airplane engine makes about 2.5 HP from 0.4 cubic inches. That's about 6 HP/cu-in.

 

i know, im not arguing, it im just saying not many could do that. i know they were out there, with vettes always being gm's baby they had better than everything else. anyways i understand where your coming from, and well just leave it as that and go back to the stroker discussion

 

so many factorrs in a good engine. bore size vs. stroke. rod ratio. valve angle. etc. the ls1 has those heads and unique design there. its really unfair to compare the older less advanced engines to the newer ones. in 1970 1 hp per cubic inch was a feat. but its was doable. you dont have all the cam choices now. head choices. manifold choices etc.

 

zero decked block and 305 Vortec heads wakes up a 307

 

aurora IL, its not really worth it to ship since they aren't vortec's not really worth the gas for you to get here either probably