cals400ex

iTrader: (27)

I will be using a TR 224-112 cam, TSP 2.5 5.3L heads, new stock LS1/LS6 lifters, stock rocker, etc. I will be using the stock GM head gaskets. TSP recommended 7.4's while Patrick said he would probably do the 7.425's. What do you guys think?

I am not sure if one is easier on the valvetrain or if one will keep it quieter?

cals400ex

iTrader: (27)

By the way, I didn't have TSP mill the heads more than they normally do. They told me they usually take off .004-.005 thousandths off to clean the surfaces.

voda1

iTrader: (4)

Concerning length, what head bolts are you using, early model or late model? Is the length selected because of the block year or year of head?

Z28/2002

iTrader: (27)

I went with the 7.4s with my 5.3/MS3 combo. Your best bet might be to get a pushrod length checker just to be sure

cals400ex

iTrader: (27)

I am using new ARP head bolts, not studs. I am not sure what you are asking in terms of the block or the head? I honestly didn't know the headbolts varied. I am using them on a 2000 Z28 if that matters any.

voda1

iTrader: (4)

GM perf parts lists 2 head bolt kits for LS1:

1997-2003 long style #12498545
2004 & up short style #17800568

So if block is 00 and heads are 05, which to use?

P.S. I see where ARP also list 2 different numbers.

Grimes

iTrader: (3)

wondering why you didn't have them milled? I would at least do .010 or .015 for more compression

SSDriver

iTrader: (2)

Depending on the size of his cam he might not of had a choice to mill lol. If the block is a 2000 you have the long bolts. 2004 is when GM changed the blocks where they have all short bolts.

-William

PREDATOR-Z

Both will work, the 7.425 will add .015 preload and make things a little qieter.

Z28/2002

iTrader: (27)

PREDATOR will these also work for the TSP 5.3/MS3 combo?

PREDATOR-Z

Yes, any cam only XE & XE-R lobes
XFI and LSK will like up to 7.450

Z28/2002

iTrader: (27)

Alright thanks




Sorry for the thread hijack

Grimes

iTrader: (3)

I thought he was using the 224/224? If he is, he definitely has room to mill, and I think he would be happier with the results as well!

cals400ex

iTrader: (27)

I have a TR224 cam on the way. I am using the TSP 5.3 L heads as well. They recommended that I did not mill them. I probably could have had them do it but I just went with what they recommended.

cals400ex

iTrader: (27)

maybe i didn't make it clear in the first post. i am sure i would have room to mill. i just went with what TSP said. so you are thinking 7.425 with the 5.3L heads and a TR224 cam using stock GM gaskets?

PREDATOR-Z

Not thinking, I'm sure.
7.400 will work but a bit noisier (less preload)