blackccoupe

my buddy is going for 350 -400 hp in his ls, he is doing pistons rods, does he need a block guard or a aftermarket girdle any help is appreciated

blinx9900

instead of spending money on a girlde or block guard i suggest putting that money to proper balance and assembly. 340whp b16 right here 9000rpm no block guard. But if he is hell bent on using a block guard then make sure its pressed in BEFORE borexhone.

blackccoupe

no he is getting it balanced and all machine work done

turbociv910

470 whp no block guard- 82mm sleeves

if your sleeve is going to break, its just going to break below the guard. It will still crack with the block guard in place, just wont fall apart.

dont waste your money.

bondobird

hey i got a question...i know alot of people build over 400 wheel on a naked block with boost. but as i understand it nitrous puts alot more stress on the cylinders. is this true? how much power can i get away with on a bottle fed naked block? i'm running a block guard anyways but am curious if it was even nessesary. if not then maybe i can give even more squeeze. let me know
also i don't know if it makes a difference but i'm running a d16y7. i don't know if b series blocks are stronger stock

enrike

i always put a block guard whene i build an engin that will run between 375 and 500
less than that no block guard more than that g/e sleeve
if you just put the block guard likek this i guess it couldn t help anything
mine i welded it on both side when it is done it look like a closed deck then i make mi holes for coolant
with those setup i never had problem

Schister66

Block guards are a waste of time...dont bother.

honda_fan06

a block guard is not only for the saftey of the sleeves cracking its also so the sleeves don't move inside the block. i have one and i'm only making 350hp. but thats just my .02

tegman23

making 370+whp daily driver no block guard stock sleeves...Its all in the tuning

fast2camciv

block guards are nonsense. ive seen more blocks fail BECAUSE of them. i personally have never seen a motor fail, and determined that a block guard would have saved it. they are a waste of time and money. none of my cars have ever had one, nor will they ever.

ahobbs

415whp completely stock gsr

Rooftop voter

iTrader: (1)

Why would a block guard CAUSE a motor to fail? Seems that it would help keep the cylinders from moving. My tuner is pretty reputable here in Ohio and he suggested I get one. I don't think he would steer me wrong, or want to put his name on a motor that will fail, or put in a part that could CAUSE it to fail. Can someone elaborate more on this as I have a block guard that has been installed on my motor that is bieng built. Thanks.

Tony the Tiger

Blockguards = old hyped product back in the late 90's...

They don't work and they never did... People still blow through stock sleeves with or without them. Instead, they hinder the cooling right at the top of the cylinder bore, causing the motor to run hotter, more prone to detonation and crappier coolant flow.

The_Honda_Guy

The idea behind a block guard is good in theory, but in reality it has a lot of major flaws.

First of it, if it's not installed before cylinder boring and honing you'll run into problems. Generally installing one throws the cylinders out of round and requires them to be bored and honed. If you had already bored and honed the cylinder you just threw your work down the drain. The other major problem is that it limits coolant flow to the top of the cylinder, where they get the hottest due to combustion taking place. Limiting coolant flow to this area is very bad, as it is the hottest part of the cylinder.

I've yet to see an engine that a block guard would have saved it also. Do you realize how many motors on here are making 500+ WHP without one? Reliability of a motor belongs mostly in the tune, not throwing reinforcement parts at it.

drift2004

if im not mistaken there was a thread on this talking about how the expansion rate of the block guard was different than the sleeves, thus not causing the sleeves to expand normally, something like, i think, i dont have one either and im pushing 390 wheel power

fast2camciv

exactly. if the sleeve cant expand outward (because the block guard is there) or the block guard cant expand outward, then both are going to expand inward, and at different rates. ive seen cylinder "shrink" and chew up piston to wall clearances and all of a sudden the piston is trying to weld itself to the cylinder wall.

JDMb18c1HATCH

ive been reading on this all day after I come across the subject somewhere so maybe I need to elaborate a little.

I have a semi fully built 95 gsr and when I got the block it had a block guard in it hence I was new to the honda game so I thought it was cool. Now after thousands of dollars later my build has been done for about 3 months and has less then 50 miles on it because it overheats and I have an aluminum triple core radiator NO thermostat all new hoses water pump fans everything is brand new and my car runs at idle about 180-200-210 normal and when getting on it iv seen it jump up as high as 265-270 temp and now that's scary to me. so i got board today and was looking up darton sleeves and came across the subject dart sleeves vs block guard over heating problems and figured that its my block guard causing the problem. so pretty soon as in the next week or so im pulling the hole motor and redoing it again this time trashing the block guard because that's the only thing i see keeping my temps so high.

Also it has the water hole passages where the water can flow threw it but im guessing not enough.

SO IMO don't you think that after reading on this forum and several others that if there is well over 10,000 cars being built and already built running 450-800 WHP with no block guard that they are useless? and don't you think that if a block guard was going to make that big of a difference to improve the motor that Honda would ketch on and have the stock blocks built with a block guard type design not only for durability but honda knows what happens to 90% of the motor they produce, They end up in a street/drag car so why not improve the design right?

my point is if the block needed it its because your running 28-40 psi boost or a **** tone of giggle gas but if your going to do that why not just spend a couple more hundred and re-sleeve it if you know your gonna run this much ****.


same as darton mid sleeves with the built on block guard design they are not needed unless you plan on running 1/4 mile passes every 30 min or so because for a DD they will also cause heating problems. but hence this its been known for honda drag cars to run alot better at higher temps but not for a long period of time.



any way just my 2 cents

b18master

my d16z6 has 2 blockguards and has never been bored or honed, and works great has 463whp 356wtq... the only thing i did was marked the head gasket holes on the blockguards and drilled bigger holes...

TspEk9

So your saying its all in the tuning?, so that means I don't have to upgrade my rods etc..as long as I have a good tune? In theory a block guard will help reinforce the top portion of the sleeves, plus if u think out the box u will drill holes so it will align with the holes on the headgasket, then I would bore and hone

jetspeedz

Bingo, back in the 90's when it was just Rev hard vs Drag and greddy we used block guards and one after another eventually they failed and the motor always ran hotter which probably accelerated the time to failure.

Do it right and get some sleeves from Benson or Darton and get a good tune. Pay now or pay later is what I always say.

cleansi

ahh yet another thread brought back from the dead


www.honda-tech.com/showthread.php?t=2098924
http://www.honda-tech.com/showthread...1328859&page=2
www.honda-tech.com/showthread.php?t=2674171
www.honda-tech.com/showthread.php?t=1495885
www.honda-tech.com/showthread.php?t=2426596


these are just a few not counting the FAQ this thread should be removed imo. if your a monkey you can find your answer in about a min.
there is no set HP that they are needed and have been shown to be pretty ineffective as a matter a fact when some one here on Honda-tech contacted golden eagle about why they even still make them they said ''because people still buy them''
if he wants security have it sleeved professionally.