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View Full Version : When to fill the block?


Jay_rich
10-08-2009, 05:34 PM
So as is my car is putting down 583rhwp (maybe 700hp crank?) only on 8 psi...next year im aiming towards 800RWHPish

Should I 1/2 fill the block this winter?

How is drivablitly after like for heat? I know Taner is half filled and he has driven for a few hours no issues.

Jay
dsmawd350
10-12-2009, 10:35 PM
curious also??????
Jay_rich
10-13-2009, 12:35 PM
Lol yeaa..been like a week, Ill just call taner this week and ask him haha..Ill let ya know what he says.

Jay
AChotrod
10-13-2009, 12:39 PM
lol! I would like to know this to. Im at 405 rwhp NA with a S60 and twin disc clutch, so prob close to 500 flywheel. Ill be addin a nice 200+ shot soon on top of that. So this info would be great!
Jay_rich
10-13-2009, 01:55 PM
lol! I would like to know this to. Im at 405 rwhp NA with a S60 and twin disc clutch, so prob close to 500 flywheel. Ill be addin a nice 200+ shot soon on top of that. So this info would be great!

with a 200 shot on that you should be fine, im making 583RWHP at the moment, Also when I was N/A I was making 411RWHP thru a 12 bolt and auto and I gave it a 125 shot a few times then stopped bc I was sick of checking my plug gaps and they fouled up after comming off the juice.

But for extra insurance it would be a nice thought!

Jay
AChotrod
10-13-2009, 02:10 PM
yeah I was 415 b4 I put in the street twin, but Im talking 200+. Oh well Ill just beat it untill it deforms. lol!
jakesz28
10-13-2009, 05:45 PM
Mine isn't filled.

Both of the shops that I talk to don't want filler in it. When LME put it together thay said it wasn't needed and I told them I wanted to give it 350+ hp of spray.

The other shop that will be getting my motor soon doesn't want filler either. They said that it cause issues with bore taper and the bore needs to be looser if I do go that way in the future.

I'm 3200 pounds on nitrous and the time is in the sig
AChotrod
10-13-2009, 06:05 PM
enough said. I wont worry at all then.
Jay_rich
10-14-2009, 06:29 AM
woot okay I wont bother then, I mean your in the 8s hahah

Jay
Formula 350
10-14-2009, 06:43 AM
I gotta say I'm no noob around cars but what is filling the block. I have no clue what that is can you guys shed some light on the subject
monster81
10-14-2009, 09:24 AM
block filler is only needed when block cylinders are overbored to a point where the walls get too thin to be safe.
Tony Shepherd
10-14-2009, 11:20 AM
Mine is half filled. All of my engines in the past have been half filled. To me it is just added strength to the block. It helps keep the bores from moving around and helps stabilize the block. Kinda gives you an internal girdle. It can't hurt...right?:cool:
Formula 350
10-14-2009, 12:23 PM
no not at all thanks for the info
Jay_rich
10-14-2009, 07:54 PM
Taner says go with the half fill now hahah So now he is on the search for some fill for me haha...

Jay
popo8
10-14-2009, 07:58 PM
I gotta say I'm no noob around cars but what is filling the block. I have no clue what that is can you guys shed some light on the subject


This was my first time hearing about it as well. Thanks for asking.
Spartan7
10-14-2009, 10:35 PM
block filler is only needed when block cylinders are overbored to a point where the walls get too thin to be safe.

Or if you punch through to water on a stroker.
popo8
10-15-2009, 06:18 AM
what exactly is "filled", and what is it "filled" with?
96LT1355Z28
10-15-2009, 06:38 AM
Just a few of many kinds and brands!

http://www.summitracing.com/parts/MOR-35571/

http://www.summitracing.com/parts/HNH-860212/
gregrob
10-15-2009, 07:09 AM
A lot of guys I know use "hardblok". Seems to work well.

Its basically high tech concrete.

Its worth mentioning that you cant just "fill" an existing block thats already setup without further machine work.

If youre going to fill a block your shop needs to know about it before hand.
fuel
10-21-2009, 07:53 AM
my next block is going to be 1/2 filled. i want the added strenth.
MeanGreen94Z
10-24-2009, 04:38 PM
block fill is NOT always good for filling where you broke thru... that needs to be treated with an epoxy then the fill added ontop of it, the fill CAN but will not always seal to the block properly and should be watched closely... IMO if i were abusing the motor i would do 1/2 fill. i would worry more under N20 than boost but both can be pretty harsh
Jeffz28
10-26-2009, 09:38 AM
My block is 1/2 filled I think it definitely gives you a little added protection but then again how much will it really help 25+ lbs boost??? In the next few months I'll know. :clap:
Pauly Walnuts
10-28-2009, 05:53 PM
Mine is half filled, never had an issue.
monster81
10-30-2009, 02:02 PM
cooling with half-filled LT1s is not a big issue i guess since its a reverse flow cooling system :cheers: