biggest cubic inch small block

[oldred95]

I know eagle and maybe others make make 396 stroker kits for SBC's but is there any other kit or any way to get more cubic inches out of a small block? A few years ago HPTV build a 472 small block but the deck heighth and everything was changed to allow for such a big displacement. The eagle 396 stroker kit with .060 over pistons would make a 401 but boring that much isn't the best choice to make. Just curious.

[Blaze5509]

There is a 400 small block:dunno:

[oldred95]

There is a 400 small block:dunno:
I mean taking a stock 87-95 TBI block and getting as many cubes out of it as possible.

[02Z]

You can build a 434 inch SBC without any problems...Hardcore (Bill Mitchell) builds a 454 SBC...I can't remember if the deck height is different than a stock 400 or not.

[02Z]

I mean taking a stock 87-95 TBI block and getting as many cubes out of it as possible.

O well if you are using a 350 block then a 396 is probably about as far as you can go. I would just got tried and true with the 383. You better find something better to feed it than the stock TBI though.
Might want to check out how strong those blocks are...I know they are 2-bolt blocks...2-bolt blocks can be good and bad...talk to a reputable machine shop and they should be able to tell you.

[oldred95]

O well if you are using a 350 block then a 396 is probably about as far as you can go. I would just got tried and true with the 383. You better find something better to feed it than the stock TBI though.
Might want to check out how strong those blocks are...I know they are 2-bolt blocks...2-bolt blocks can be good and bad...talk to a reputable machine shop and they should be able to tell you.
An 850 cfm 2 barrel TBI and T4 garrett turbo are going to be feeding it. I plan to use either a 2 bolt main with splayed 4 bolt main conversion caps or a stock 4 bolt block.

[tee-boy]

O well if you are using a 350 block then a 396 is probably about as far as you can go. I would just got tried and true with the 383. You better find something better to feed it than the stock TBI though.
Might want to check out how strong those blocks are...I know they are 2-bolt blocks...2-bolt blocks can be good and bad...talk to a reputable machine shop and they should be able to tell you.

I'm told that the 2 bolt blocks will support up to 400 hp. I'm guessing that was for a strip application.

[tee-boy]

O well if you are using a 350 block then a 396 is probably about as far as you can go. I would just got tried and true with the 383. You better find something better to feed it than the stock TBI though.
Might want to check out how strong those blocks are...I know they are 2-bolt blocks...2-bolt blocks can be good and bad...talk to a reputable machine shop and they should be able to tell you.

Why do you say go w/ the 383 when you can stroke it to 396?

[tee-boy]

Why do you say go w/ the 383 when you can stroke it to 396?

I think the general rule is as you increase cu in via a longer crank you tend to give up redline and gain in lower end torque.

[piper.gras]

Yes, this is true. Stroking an engine increases the mass of the rotating assembly, which causes a drop in the RPM limit of the motor. In a truck application you don't necessarily want/need high RPMs, so 396 should be ok.

(If I remember correctly, a small block can be built up to 502 ci, but that's really stretching it pretty far.)

[CKTA]

You can now make LS1's over 500 ci. :cool:

[TITANIUM]

I think the general rule is as you increase cu in via a longer crank you tend to give up redline and gain in lower end torque.
That is one of the reasons I don't like stroked engines.


I would just keep a eye out on a Big Block and build it up.

[02Z]

Why do you say go w/ the 383 when you can stroke it to 396?

The more you stroke it the more you'll spend in clearancing the block...and the more the parts are going to cost. If he sticks with a standard 3.75 stroke then the parts will only be 1/2 as much and it'll still make basically the same power. He may give up 15 hp, but that 15 hp is going to cost an arm and a leg.

Of course if he's going to have a T-4 on it then it's going to need the best of the best. That motor will make 700+ hp, easily. He's talking about a $10K motor, a $3K tranny, and a $2K rear to hold it together. Then he's on to suspension parts, etc. This is absolutely crazy and will cost $20K to keep it together and put the power to the ground...just build a stout N/A motor and be done with it. You can make a 9.5:1 383 make 500 hp easy...that's enough to put that truck deep into the 13's or maybe bumping into the 12's, depending on the setup.

[AyerForce]

You can now make LS1's over 500 ci. :cool:

Thats unreal, how much over 500 can you get? Is that out of a stock block?

[mds2004]

You can now make LS1's over 500 ci. :cool:

Yup, I just read the thread and .pdf on it the other day on one of these forums. That thing looks insane.

[mds2004]

Thats unreal, how much over 500 can you get? Is that out of a stock block?

I found the link. Check out this pdf:
http://www.erlperformance.com/techbriefs/_LS2500ci_Sleeve_Design.pdf

[todd1969]

oldred95:

If you get some great heads and have them tricked out, you can have all the horsepower potential you can imagine. Look at Cup engines...only 358 cubes, but making 850 horspower with a lot of homework done in the heads, intake and carb. Not that they are anywhere near stock, but you do not have to have 396 cubes to make 700 horsepower. www.airflowresearch.com

Look at AFR heads and control your slobbering when you see what they have! ha ha :worship: They have some choice pieces that really make power from idle to 8000-9000 rpm's if the heads are setup for that many rpms. AFR has a superb reputation and they can do virtually any machine shop work that can be dreamed up, plus send or buy a manifold from them and they'll make everything flow / work together.

You'll not go wrong with a great set of heads ever, they will not hurt the low end and will not hurt top end either. :burn:

[Nick]

You can now make LS1's over 500 ci. :cool:
Yeah, but how's he gonna adapt his TBI to it? :LOL: :LOL:

[oldred95]

Yeah, but how's he gonna adapt his TBI to it? :LOL: :LOL:
Hot glue and lots of duct tape should do it:crazy:


The reason for the 396 is simple. The 383 is tried and true and its a good platform don't get me wrong but if a 396 kit is out there why not go with it. Believe it or not the fully forged 396 stroker kit is cheaper then the fully forged 383 stroker kit. See for yourself.


383:
http://store.summitracing.com/partdetail.asp?part=ESP%2DB12110030&N=700+4294925232+4294919598+4294908216+4294924755+ 4294840140+4294889107+4294854588+4294832650+429487 0257+4294891094+4294774852+4294854580+115&autoview=sku

396:
http://store.summitracing.com/partdetail.asp?part=ESP%2D12113030&N=700+4294925232+4294919598+4294908216+4294924755+ 4294840140+4294889107+4294854588+4294832641+115&autoview=sku

[1989K1500]

Thats unreal, how much over 500 can you get? Is that out of a stock block?
Yea, but with deck plates and the cylinders sleeved.

I saw the article on it last month I think it was, in Car Craft.

[bigkountry]

Can't go wrong with a 377 either. I know it's not as much CI as you are wanting but they are good strong engines.

[Pauly]

GM is about to release a smallblock LSx block that can be bored and stroked up to 480 cubes and is designed for up to 2500 hp and will cost $2500.

the largest GEN 1 smallblock I have heard of using the stock deck height is 467 cubic inches.

I have also seen 2 smallblocks welded together for 700 cubic inches.

peace
Pauly

[Pauly]

Yeah, but how's he gonna adapt his TBI to it? :LOL: :LOL:
Grap the GMPP GEN3 carb intake and drop teh TBI unit right on top of the intake manifold. If it can be physically fueled by a carb, it can be fueled by TBI unit.

A 396 from a 350 cube engine stroker kit only costs about $200-$400 more than your typical 383 stroker kit. I think that displacement sounds cool.

Him "Whatcha got under the hood of that truck?".

ME "Its a 396."

Him " Oh, an older bigblock".

Me " No a Vortec 396 smallblock, wanna race?"

peace
Pauly

[oldred95]

A 396 from a 350 cube engine stroker kit only costs about $200-$400 more than your typical 383 stroker kit. I think that displacement sounds cool.

Him "Whatcha got under the hood of that truck?".

ME "Its a 396."

Him " Oh, an older bigblock".

Me " No a Vortec 396 smallblock, wanna race?"

peace
Pauly
Check the links I posted earlier. The 396 kit is cheaper and yes its all forged too. Don't ask me why.

I've thought about that, that and the fact I could put 396 SS badges/decals on the truck and it would in fact be a true 396 under the hood.

[chevynutss]

Can't go wrong with a 377 either. I know it's not as much CI as you are wanting but they are good strong engines.

I know a guy with a 377 running AFR heads and a pretty extreme cam making somewhere around 700 horsepower. Although it is not in a truck, it is in a 80 Malibu running 10.60's with alcohal.

[Diamond Jim]

You can use GM part #22551788 the so-called "Rocket Block" and get up to 452 cubic inches. That is about the biggest from GM. Some of the other blocks GM part # 12480045 & 12480046 can go to 412 cubic inches. Many of the late year blocks, all with the casting numbers 10051184 or 10051182 are limited to either 402 or 396 cubic inches because they are limited to about a 3.75-stroke. Yes this is all with the Gen I chevy small block.

[GB's 03]

A friend of mines uncle had an s-10 with a 427ci small block. Some thing like 650hp. The nut ran stock rims and tires. We had 3 people in the cab and 6 in the bed and it broke the tires loose in 3rd gear.

[jomac11]

There is a guy at the local strip that runs a single-turbo 468 small-block, but its not a stock chevy block...

[Diamond Jim]

The sizes I listed above are with the GM recommended bore for those blocks. We all know that some builders go "trick" as they say when they build engines and ignor GM's advice. I believe that then they can get 502 cuin from the "rocket block" and about 430+ from some of the others. But when going this big they may have to use liners in some or all the cylinders, and may have to relocate the crank and/or the cam.

So when does it stop being a "stock block" and become a "custom block"?

[redchevysport]

Yea, but with deck plates and the cylinders sleeved.

I saw the article on it last month I think it was, in Car Craft.

And these aren't legitimate engine building techniques?

[bored&stroked]

454cid small blocks are possable, I didn't see if this must be stock blocked or not. You CAN fit a 4" stroke crank in a gm block, but be prepared for lots of grinding, and thats about 434cid max.

[aqrhine]

hell while we're on the subject of smallblocks a built 355 can be a wicked motor. I have a built 355 in my S-10 and that thing is crazy. I can't keep it straight in 1st and 2nd gear with 11inch wide falken street tires on the back with a 17X10.5 rims.

Simple engine to build, 350 bored .30 over depending on what parts you build it with it can make more than enough power. I'm guessing I'm sitting around 400 HP right now I havn't got to pull onto a dyno yet though.

I'm building up another small block 350 this winter, I plan to make a 383 stroker with forged internals and a duece 4-barrel setup. I'm wanting around 600 hp out of it. After I get that engine built I'll be putting the 355 in a 1969 MG roadster.

Of course my S-10 weighs 2960 lbs with me in it. So when you under 3,000 lbs it doesn't take a lot to go fast. I'm looking for a high 12 low 13 second quarter with the setup I have now.