head gaskets

Well I got good news and bad news. With my current combo ford 383 on the motor it ran a miserable 13.5 @ 101 on the stock computer, after installing an accel dfi gen 6 and a d1 procharger I ripped off a 11.20 at 123.5! I am really happy knowing the is still more there yet, considering I am using 36# injectors with no fmu and the only tunning has been by myself. I believe the dyno tuner can help more yet. Now for the bad news I cant keep belts on this thing I've wrecked 6 so far in a couple weeks time. And yesterday on my fifth run I blew my second head gasket since I've had the procharger on. I am useing 1011-2's reccomended by world products. I was told today by the summit salesman these gaskets are only rated for 6#'s of boost is this true. Can I get a better gasket not ready to switch to cometics yet. My kit is rated for 12#'s but I've only seen 9#'s. Thanks Steve

Most of us have had better luck with the felpro 9333pt-1's over the 1011's. Some guys do have luck with the 1011's. Your real problem is fuel. 36's are way too small for that combo. What's the rest of your fuel setup look like?

I like the ROL gaskets. They make a 0.045 and 0.039 compressed thickness. They seem to be pretty durable in my car. Any gasket will blow with the wrong tune up though. Cometics might hurt parts as well.

yeah those HG's are trash with boost, try 8548's 9333's or FRPP B51's along with some others cometics come to mind. im with Eric your injectors are WAY too small. you had better get a FMU on that thing till you bigger injectors.


Scott

I know I have been trying to find a deal on some 55#'s for a while now. The rest of the system is a paxton pump like the aeromotive A1000 8 braided feed to paxton rails a paxton regulator and 6 return. Shortly I plan to do a 10 feed and y off 8 to each rail and a 6 return off each to the reg. and an 8 back to the tank. Any way I talked with a summit tech today and he said the 1011-2's aren't made to handel boost. He reccomended a Mr gasket mls 3165-g and 3166-g right and left for 65.95 each. He said these are rated at 10#'s boost. Anyone used these yet? Steve

More bad news I got the motor apart and found the head gasket blew out between # 2&3 cylinders, which also burned the aluminum head about .015 thousands deep! Can the head be milled that much? or does it have to be welded? or is it junk? The block looks OK in that spot though. Probably from having too small injectors. Pay now or pay latter right. Steve

easily fixable by a good head/machine shop, ive blown a HG a few years back that took a chunk out big enough to fit a thumb in. man before you even think about getting into boost again, get bigger injectors or a FMU on there. you really need to get a tune at your local dyno, or even better yet get a WBO2 to tune with.


Scott

you should really go at elast 42s before ditching the fmu, i was going to go cometic but i heard you should have dead straight heads and block or they wont work right

I had 1011's with 13 psi with 42's and an fmu for four years and no problems. Just a few weeks back at FFW at Norwalk, now making 20 psi with 60's, I blew the head gasket between 6&7 and also took a chunk out of my aluminum head. Mine was more like a 1/8-1/4 inch deep. My bad, I ran mixed fuel. But I had a pro 5.0 guy weld it up and grind it flush with a dremel tool ($50) and in 30 minutes was back putting it on. I checked and my compression is good on those cylinders now. Not bad for 30 minutes and $50.:

And here is what the gasket looked like.

blownby, did you use 1011-2's again or something else. My cylinder on #3 looks pretty scored I assume its from the peice of sealing ring that is gone. Any suggestions should I put it back together or should I pull the block and hone that cylinder?

Quote:

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Originally Posted by 383STROKER

blownby, did you use 1011-2's again or something else. My cylinder on #3 looks pretty scored I assume its from the peice of sealing ring that is gone. Any suggestions should I put it back together or should I pull the block and hone that cylinder?

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I used the same 1011-2 again. I only changed the one side. They seem to be fine and have handled the boost.

As for the cylinder, you may want to put it back together, and run it for the rest of the summer. Tear down and fix it this winter. It's a matter of down time for now and exactly how bad it is. You may want some better opinions though.

I had 1011-2 w/14lbs of p1sc on 100,000 mile motor, and the rings went,but not the head gasket for FWIW.

The graphite gaskets like the B51 and 1011-2, their strength is in that they are more forgiving of very slight shifting/lifting of head vs block, but they are less able to withstand extreme cylinder pressure such as when detonation occurs -- in other words they work very well right up until they stop working. <grin>

OTOH the metal core gaskets like the 9333, Vic Reinz Solicors, Mr Gasket MLS (multi-layer steel), can withstand more extreme cylinder pressures, but you better have them clamped down right (aftermarket bolts, not recycled oem TTY bolts) and have the motor tuned right, because they are not nearly as forgiving as the graphite gaskets.

BTW that $65 each price for the MLS gaskets is a little steep considering that Victor Reinz produces both the Mr Gasket MLS and the NAPA HiPo 3428SCR gaskets, and the NAPA gaskets are only $46 each. The steel core gasket technology was pioneered by Vic Reinz for use in diesel engines, which basically live under high CR constant detonation conditions their entire lives...

edit: as for the scored bore if you can catch your fingernail on it you may want to consider honing, otherwise you rolls the dice and takes your chances.

Thanks for the info fanglemeister. Are these Mr. Gasket mls reusable? Considering the price they should be. Do you know how they compare to cometics. I decided I will take out the motor and remove the 2 pisons the head gasket blew between and inspect and hone. I also bought some RC engineering 50# injectors of the corral. The heads are at the machine shop and hopefully everything will come together by the end of the weekend. Now I just have to figure out why my transbrake stopped holding, any AOD tranny masters aroud here? Or maybe an AOD Forum somewhere. Thanks Steve

No, once the steel core gaskets are crushed they recommend you not reuse them. I have no personal experience with the cometics but I hear mostly positive comments, little to none negative (other than pricing and availability). Better safer than sorry on the inspect and hone.

I predict you'll be happy with those RC injectors :-)
What are you planning for a MAF meter?

I am running a dfi gen 6 it uses a map. Its old tech. but it works great and no more mass air meter!

sweet! :)