Tiago

iTrader: (27)

2 actually

1. What headgaskets should I go with running a 99 head. Ive read some issues on what gasket to use on different years?

2. What piston rings to run? Gapping info would be nice as well.


I have big goals for this engine

y2khawk

iTrader: (5)

How big is big

Tiago

iTrader: (27)

LOL, ok, at least 800 rwhp if thats all the heads will go before they lift. I intend on running the same bottom end later on with different heads for more power hopufully.

y2khawk

iTrader: (5)

Well

I'm running GM 6.0L gaskets w/ run of the mill ARP head studs. No o-rings, and no lifting we've noticed to far.

For rings, I'm using Total Seal standard gap'd rings. I've got a wierd ring pack size so I'm limited on what's available versus having them made. I'm stuck with their standard classic race series of rings for now.

I'm currently running .0065 * bore on top, .0055 * bore on 2nd ring. It's a litte more blow by at idle than most want, but it seals up well under power and my dry sump takes care of evacuating the crank case at speed.

FWIW, i'm just about 900RWHP based on what it's run and what it weighs. No dyno numbers, it spins the tires past 18 psi

Tiago

iTrader: (27)

Any opinions on the Diamond rings they offer? Im deffinately using a set of their pistons.

Harlan are you using 6L heads too? Or do the 6L head gaskets work on a "stock" 5.7L head?

Pro Stock John

iTrader: (34)

I am running a Speed Inc. Sportsman shortblock. I am running Diamond -8.6cc FI pistons with whatever rings they use. Car runs pretty clean and we are very impressed with how clean the car runs down the track. I am running 6.0 heads and 6.0 GM MLS headgaskets with the fancier H11 head studs. I have seen 17 psi on the dyno and 15 psi or so at the track.

PurEvl

iTrader: (2)

I run a felpro with 6.0l heads

MIGHTYMOUSE

iTrader: (59)

i run cometic replacement gaskets, but only because the gm gaskets dont work with my 98 heads (got the notch), also run stock replacement arp studs.

y2khawk

iTrader: (5)

Never used the rings from Diamond, so can't comment.

yes, 6.0L heads. Using the 6.0 gaskets due to the chamber diameter of the head. They would work w/ a 5.7L head, would just move the gakest bore out more than normal. Some have commented on that being a good thing anyway.

Tiago

iTrader: (27)

I thought the 99s also had the "notch"?

MIGHTYMOUSE

iTrader: (59)

i dont know enough to say if they do or don't.. just look for it

NA$TY-TA

iTrader: (21)

I blew a whole out of the notch and took a chunk of the block with it on my 98 heads....... 6.0L now and ARP normal head studs. I hope to make 700 with my new FMIC and pullying up.

Tiago

iTrader: (27)

I sure hope I don't blow a hole through the block because of some F'n heads.

MIGHTYMOUSE

iTrader: (59)

my notched heads are fine.

Malicious

iTrader: (1)

Sorry to hear bout what happened T, good luck with the new stuff, will try to catch up on it soon as I get back!

smokinHawk

iTrader: (48)

the 99's dont have notched heads

why dont you 98'ers get some 99 and up heads. ;0

Tiago

iTrader: (27)

So what is recommended? Run cometic gaskets or stock GM MLS?

smokinHawk

iTrader: (48)

the gms are cheaper and just as good, so if you dont need a specific thickness get the GMs