Thread: crate blocks

Tweet

hey guys, im kinda lost on what to do, heres the situation, i need you guys input on this one, im aiming for 350 hp and at least that in torque. alright what is the best long block to use, but leave all stockand add bolt on to get my numbers? i want to leave the core and heads stock, but put in a bigger cam headers and a new intake. pretty much a long block that i can leave stock and put these parts in to achieve my goals. i tried looking at ryans combos, but i need a all stock long block, any info will help tons thanks guys.

Check out the following for some ideas;

http://www.crateenginedepot.com/

http://www.gmgoodwrench.com/perfpartsjsp/home.jsp


A 12486041 350 HO long block might work for you.

Why a stock long block?

i just wanna put on bolt ons and drop it in, not a serious build, i guess but something that will handle the power that i plan for it , being stock. thats pretty much it.

your not gonna achive it with stock heads or pistions and the cam won't help much because you have to have the engine built to the cam basicly, you could get away with only a mild cam assuming you have 8.5:1 comp, with leaving the engine stock, the only way to make power is to use forced induction or N20. get your compression to 9.5:1 by getting a set of good flowing 64cc heads with 160/202 valves ( you probably have 76cc ), then get a mild cam that will run from 2k but nothing too wild, you could run a slightly hotter cam but run rhoads lifters ( milds out a cam at low rpm ), a set of long tube headders with 1/5/8" primaries, a holley 650 carb on a good dual plane intake. I just ran those numbers through Dyno 2000 ( dyno program ) on a stock bore 350 with a light cam and 9.5:1 compression and it reached 300 HP at 5k, and there was 2.0 timing advance figured in. as you can see it is going to take more than bolt ons to make 350 hp

hmmm damn it, say i put on a pair of vortec heads on a 350? im looking at the 290 hp gm long block, what would i have to do to it to get around 350hp?

That long block does have Vortec heads.

350 horses is a lot of ponies for a stock engine to crank out. Get the regular truck motor crate engine, order a nitrous hp cam (smallest one) and put a 144 weiand on it just like it comes out the box. That'll get you there. Just another option. Hard to pass up 350 horses out of a stock HO crate engine though.

theres a combo on ryans, i was looking at #89 everything lookis pretty stock exsept for the cam, heads, rocker,intake, and im trying to get away with as much i as ican on this one , its with vortecs on a 350 a gm cam, which id wanna put a comp in, and better rockers in with a 750 carb. id figure if i get the truck block, throw on the vortecs and swap out the parts id have close to that, like around 340 or maybe a bit more if i get lucky, and they are all bolt ons, what i dont wannt do is have to change the pistons, or the core. i want this build to be a simple one, that has a little kick to it. its going in a 74 van, so its not like im gonna be racing in it i just want it to have some spunk to it. any more ideas?

go the 383 route, It will deliver more of what you need for the van.

Check out the HT-383 from http://www.speedomotive.com

New 4-bolt short block all machined, blueprinted, assembled with high nod crank, forged rods and forged 9:1 pistons for 2395.00, or the cheaper budget master 383 short block upgraded to 4-bolt mains and hypereutectic pistons for about 1900.00 (not comfortable using 2-bolt mains on a stroker myself).

Finish it off however you want.

I have not been able to find a decent donor block that could be clearanced, blueprinted, and assembled with a good rotating assembly for less than the above.

I'll be going with their HT-383 short block and adding Vortec heads with Comp Cam & springs. No matter how you slice, once you have added push rods, rockers, pumps, etc. it is a $4-5k endeavor once it is ready to drop in with headers and induction.

Check out the The Goodwrench Quest articles in CHP. They took the 290 HP Goodwrench engine and started bolting on add-ons. Part IV they bolt on a set of Vortec heads. They claim they got up to 371 HP on stock heads with a 750cfm carb and a little tweaking of other things in the setup. Take the numbers as you will. Read the whole set of articles. They're interesting reading. I'm sure someone else here will chime in with the validity of their numbers...

http://chevyhiperformance.com/techar...64/index3.html

http://chevyhiperformance.com/techarticles/46364/

i figured if i wanted bigger numbers than id switch to vortecs, so along with the 290 hp goodwrench block, the vortecs would work great and with the other bolt ons i read up on ryans, i can figure what i can get out of em.

Interesting article, but I wonder how long that Goodwrench bottom end will last at 350 - 400hp?

hmm... dont know, one whick block? they used two different ones right? one was like not even 200 hp and the other was the 290hp block right?

There are many different configurations of Goodwrench engines available, including an L31 with OE roller cam and Vortec heads at about $2200.00 - but it is a two bolt main block with, I think, cast crank, rods, and pistons.

If your planning to add Vortec heads to the $1700 Goodwrench engine, the swap will run you 500 - 600+ with a valve spring upgrade to run a decent cam, plus the cost of swapping to a decent cam.

For the money I still think you are better off going with the 330hp GMPP 350HO long block as it already has the Vortec heads, a 4 bolt main block with high nodular crank, PM rods, a performance cam, and better valve springs at under 2400.00. Bumping it up to 350hp or more should be relatively easy with just a hydraulic roller cam swap. I just don't see how you can beat this deal and you can use the accessories from your old engine.