JimMueller

iTrader: (9)

Placed an order with Jon @ Texas Speed this evening. He estimated the whole shebang should ship mid-to-late next week. Great fella to work with and he definitely has patience

PRC 5.3L heads (222cc intake port, 59cc chamber, 2.02/1.575 valves)
CTS-V racing hydraulic lifters
Cometic .040 MLS gaskets
ARP head bolts
NGK TR6 spark plugs

Anyone know if these heads come with regular PRC Dual springs, or the new PRC Super Duals? They're already closed but I'll contact them anyway.

Also getting the obligatory GM gaskets/seals. Next up is getting my cam specs from Patrick and finding a good deal on QTP race headers. Where might I be able to find some short lengths of flexible exhaust tubing so I can make it to the custom y-pipe fabrication shop without waking the undead?

I'll finally get to use my Comp pushrod length checker. Maybe I'll get lucky and I'll be able to re-use the hardened pushrods I already have (I think they're 7.400"). Also holding off on new injectors as I have the '98 version already, but ready to buy bigger if needed.

I already have a SLP ported oil pump and LS2 water pump. I didn't feel like messing with the stock timing chain. So anything else I'm missing?

ls2 bait

iTrader: (11)

how much did they mill them to get them to 59cc?

JimMueller

iTrader: (9)

I think they said it would be ~.021, but I have valve reliefs.

PREDATOR-Z

Yeah, that sounds right, I milled mmine .025 and got 58.6 cc

PREDATOR-Z

Yeah, that sounds right, I milled mine .025 and got 58.8 cc

ls2 bait

iTrader: (11)

ya theres no way that would clear my torquer 2 w/o flycutting. oh well...

BIG_MIKE2005

iTrader: (116)

[QUOTE=I didn't feel like messing with the stock timing chain. So anything else I'm missing?[/QUOTE]

It has to come off anyway, why not spend $20 on a LS2 chain from TSP while your in there. I wouldn't re-use the timing chain after a cam swap, unless its has extremely low miles on it.

And I would say your better off goin ahead & pickin up some Lucas 42lb injectors too. You can get a new set of (8) shipped from HSW for under $300.

john563

iTrader: (17)

XX2.I bought my 42lb injectors from Matt at Harris great prices/service.

mrr23

iTrader: (3)

i see no need for bigger injectors.

to change out the timing chain, you will need to remove the oil pump. that tiny 10mm bolt is real fun to get at.

BIG_MIKE2005

iTrader: (116)

I think this far into a build with a good solid H/C combo, not upgrading injectors is a short cut & could come back to bite him in the ***. If he ever goes with more power he will have to come back & mess with it later. Which is more of a hassle than getting them now & having it all tuned at once.

john563

iTrader: (17)

agreed thats why I bought mine cuz I have a harris dry kit sitting in my room that will be installed in the spring.When I was just cammed(tr224/112)I put down 350rwhp through an A4 and even with 28lb injectors I was at 80% duty cycle.I bought my Tsp heads and they are going in next wk and the 42lbinj/pump are going in as well.My friend james(gillbot on here) is cammed only and has 28lbinj and is making 399rwhp and his injectors are at 90plus duty cycleJust something to think about, although I see alot of people do heads cam on 28lb inj.most upgrade to 30lb head and cam,but for the price and gonna add a dry kit I went straight for the 42

JimMueller

iTrader: (9)

I'll be able to grab my duty cycle as soon as my HPT upgrade arrives. I never paid much heed to it before. Injectors aren't hard to install. If the VE is tuned, just correct the IFR table and it should be pretty close. FWIW, TSP didn't think I needed to worry about it at this time.

If I bought injectors, I was planning on using the SVO 30's. I have no interest in needing enough fuel to require a new pump, etc. Depending upon how this setup pans out, it's likely I won't ever add more power. It won't help me without traction.

mrr23

iTrader: (3)

one thing to tell these people. jim is an avid autocrosser. so, maximum hp isn't his main goal. overall use able power is what he is looking for. i don't know if jim is wanting to go past the 400 rwhp he has now. when we last talked, it was more to add the low and mid range area. of course, it doesn't hurt to get more top end also.

ls2 bait

iTrader: (11)

my injectors are at 90+% duty cycle cam only-id upgrade the injectors. maybe some svo 36's if u dont want to go to a 42lb.

JimMueller

iTrader: (9)

I'll take as much torque as the slicks will handle It'd be ironic if I start blowing the tires off in 2nd gear also

I received my initial cam specs from Patrick. It's a little more aggressive than his Torque cam.

PREDATOR-Z

This is typical missconception of fuel delivery system.
1st thing to test is the pressure at rail at wot to determine if the injectors are getting enough fuel to deliver their capacity range.
An adjustable FPR @ rail is the "first" mod that should be done IMO.

Pressure drop at wot can be as much as 5 psi which will reduce the capacity handling of the injector.

JimMueller

iTrader: (9)

I need to dig up the post, but I'm confused on shimming the springs. I've been advised to shim the springs to within .050 of coil bind, and I'm not sure if that's the same as how TSP has them installed already. Do I need to re-shim them and/or check them? If so, what's the procedure?

Edit: Here is the post: