John2005

iTrader: (4)

Well my car currently is supercharged with a vortech v9 g trim on 7psi, Speed inc si5 cam 231/237, 60lb injectors, pacesetter headers, magnaflow exhaust, comp hardened pushrods, a Precision Industries Vigilante 3200 stall, shift kit, 3-4 clutch pack so the tranny is built. Rear end has moser axels and is a 3.42 along with a rear end girdle.

So what is the next step? I am thinking about forged pistons and rods along with 14psi and a zex wet kit (can get for $400_ with a 50-100 shot along with 317 heads maybe ported. So what is your opinion on that?

conan

iTrader: (5)

Forged internals would be my next project. I would pass on the wet kit and use the money for a dual fuel pump set up. Also when you get every thing to handle 14-15 #'s I would look into a meth kit.

John2005

iTrader: (4)

I already have a single walbro gss340 255 in tank and will be putting another one in anyways. I am just debating if I want to do the ls1 or buy a 5.3 lm7 or a 6.0 lq4 or lq9 and forge that, since I know 317 heads will be 300 or so and for another 500 give or take I could get a stock 6.0 to forge. I currently am running stock 853 heads so im sure 317 heads will be better. So I am just debating it. What pistons and rods did you use in yours and how much boost are you on?

conan

iTrader: (5)

You'll need a second pump for 14#'s. I was making 10#'s at about 500rwhp and my fuel pressure was dorpping bad. I was around 35 psi @ 5,500 rpms with a single walbro and a hot wire.

If you dont mind the extra weight of the iron block I would go for a LQ9 or 4 from the junk yard, both will have the 317's. Get the heads worked with a good dual spring, bore the block .030 over with a good forged rod and piston and you'll have a bad 370ci.

John2005

iTrader: (4)

Im making 470hp/475tq on my 7psi and im retaining over 50psi even at 5500-6200rpm. So fuel pressure isnt a real problem right now I just want to put a second one in for when I double the boost. I don't want to bore it. I am just trying to do it on the cheap side. I gotta save up again like I had to for the vortech/cam/pac beehive springs etc. I figured Id reuse my cam and springs since they have less than 3000miles on them.

brian_rs/ss

if you are gonna do heads go AFR or TFS. forged internals, dish tops, custom cam, dual pumps, and save up for an s60/9"/12b.


btw do you have a FMIC?

John2005

iTrader: (4)

Just the little inter cooler that comes with them that u put under the front bumper. I do not want to spend $1000+ on a set of heads. I already have a custom cam 231/237 112lsa speed inc si5 and need 1 more gss340 pump for duals. I am not trying to have a ton of money in the car. I am shooting for 10.7 or so in the quarter not low 10's or 9's. Its already making 470hp and 475tq at the wheels im shooting for close to 600 and debating on a 100 wet shot. The rear end im not worrying about until it goes. It has lasted over 20+ launches at the track cutting consistent 1.7's and a few 1.6's the first time at the track, tires were et street mickeys not the et street slicks and were basically gone the second time at the track.

180ls1

iTrader: (4)

well if you are looking to go fast for cheap then buy spray for it. But i would put on some stock 317's and spray it that would help keep it safer.

John2005

iTrader: (4)

I was thinking 317's milled to 70 cc, some scat I-beam forged rods and some srs forged pistons running 12-14psi along with a 50-100 shot on it. Along with a second gss340 in the tank. I was just wondering how that would be. I am just wanting a 10.7 or so.

conan

iTrader: (5)

That cam isn't going to work well with a blower, 112 lsa is going to send hard earned boost right down the exhaust pipe. You want a cam with less overlap, something in the 115-117 lsa.

John2005

iTrader: (4)

thats the cam currently in the car making 470hp/475tq right now on 7psi with stock 853 heads. I dont think there is a problem with the cam.

orangeapeel

iTrader: (18)

You would probably make that with an LS6 cam.

brian_rs/ss

hate to break it to you but 470 on 7 psi isn't that great. you could have gotten the same result out of h/c/i stock bottom end with no blower. and an si5 isn't an actual custom cam, i know it's kind of advertised as custom but that's crap. it's an off the shelf grind, meant for an n/a set up at that.


but srsly, 115+ LSA alone WILL net you a nice gain. and guess what... you wont even have to do heads. so being that you want to stay cheap i would listen to what has been said and go to an ACTUAL custom grind blower cam. and then if you still aren't happy do the 317's.

John2005

iTrader: (4)

I am also on stock 853 heads and on 42psi injectors maxing them out with fuel pressure dropping up top and a ls1 intake still. also stalled auto. so I don't know why you say 470hp isn't esp in my case.

brian_rs/ss

uhm wut?


anyways sounds like you already know where your restrictions are. so to answer your original questions exactly:

1. new intake mani.
2. ported 317's would do nicely.
3. forged internals may not be needed at this point, however it comes down to what you deem necessary.
4. if you do run a kit then forged internals would be necessary. personally i say no kit, i'm sure that blower can get you where you want to be with out it.
5. i would most definitely get a custom ground blower cam.
6. new injectors and dual pumps is a must as already mentioned.
7. if it were me, i'de step up to about 10 psi with above mods and see how she runs. i bet you'd be surprised.

John2005

iTrader: (4)

I went to 60pound injectors right after I got tuned and noticed my 42s were at 99idc almost all the time. I also went and put a 255 gss340 in tank since I knew the 255 in line wasn't cutting it. The manifold I am not sure if im going to do or not yet.

brian_rs/ss

oh ok gotcha. i would def at least do a ls6 manifold.

djfury05

iTrader: (30)

I believe a FAST/LS6 intake and some decent heads would net you more than a cam swap would.. just because its not a specific blower cam doesn't mean he's loosing a huge amount of power.. anyways I'd be happy with 470 on 7psi just for reliability issues..

yes I know before anyone says it there has been bigger power made on more boost for stock internals etc.. this isn't the subject at hand

I would say you could spend $1000 on an LS6 intake/heads and pick up at least 50-60 rwhp with that setup

John2005

iTrader: (4)

Im still debating what I am going to do. I might just pick up a 5.3 and boost 14 pounds and spray 100 shot on top of it and just put arp2000 bolts on it and transfer my cam and intake and stuff over from the ls1 and pray it holds since thats cheaper than forging the ls1

djfury05

iTrader: (30)

praying and taking cheap routes isn't really where you wanna be lol.. but best of luck man