RacingTiger03

iTrader: (3)

I'm just in the researching phases for now, but heres what I'm looking for.
I would like ~500RWHP, the car is daily driven on the street, and never really sees track days (a couple during the summer, but nothing to write home about), so if I have to give up some of that 500 peak for a more solid torque curve like the car has now I can live with that. My driving is equally divided between city and highway if that makes a difference at all. I also run 93 octane all the time since the car was dyno tuned for it, so more compression isn't a deal breaker either.

Do most kits come with springs or is that something else I would need to get? I would also like to get some lifters in there while everything else is torn down, so what can you recommend?

Also, if you recommend a setup, if you have any personal experience with its reliability please comment on that. That is my primary concern. I don't want to have to work on the car just as much as I drive it! lol

garygnu

vengeance racing has a nice head/valve train combo,top it off with a fast intake.AFR has great heads,and Tony Mamo knows what cam works with these heads.Tony Mamo has a thread "recipe for 500hp" look it up.check the dyno section for results.

ryans01z28

iTrader: (12)

i got my pack from texas speed and performance TSP stage 2.5 heads and it seems to make good power. ill find out when i dyno it in a few weeks

RacingTiger03

iTrader: (3)

Yeah, I was looking at the stg 2.5 5.3L heads & cam package from them, but couldn't find too many numbers for the different cams. Most I found were in the 420 range. But I guess thats really good for under 2000!

Does anyone have any personal experience with the reliability of this kit?


That 500hp thread has some great info, I just didn't know if anything better had come along since then. And I'm really not looking to change the intake or any of that. I would like to keep under the hood "Looking" as stock as possible. Obviously anyone with any sense will know different when it is running, but thats fine with me. From that thread he listed there werent huge differences between the intakes, I think 20hp? IIRC between the fast and stock... not worth the cost to me to be honest. Im more concerned with keeping the torque curve solid like it is now, and an extra 150hp would be great But whatever is realistic is what I'm after.

PREDATOR-Z

TFS 215 and a custom cam

01ssreda4

iTrader: (96)

https://ls1tech.com/forums/generatio...heads-cam.html

dbeach2001

I've been looking at the TFS kit TFS-K306-515-460. It has the 215 heads, 585/585 lift cam, harden sharp shaft rockers, push rods, bolts & gaskets.

Make 515hp/460 tq. sells for $3300.00 at most shops. Sounds like a good kit.
I'm running an LS6 intake and kooks long tubes on stock LS1 bottom end.

I like getting everything in one kit, matched buy people that know more about this than I do.

Good luck with your search.

Kris Mangrum

Tuned in.

Paint_It_Black

iTrader: (1)

I don't think people realize the detail in a 500rwhp 346 cubic inch engine. There is no "head and cam kit" for it. And you aren't getting there with a stock throttle body and an ls6 intake. You might want to lower your expectations by about 50hp.

Paint_It_Black

iTrader: (1)

That kit should get you 435-440 rwhp in an M6.

orangeapeel

iTrader: (18)

Sounds like crank horsepower to me. 500rwhp isnt gonna be as streetable as you might think even not on a "budget". Its gonna take a dialed in *****-on tune as well, that will eat up a dollar or 500$ right there. It can be done, but its gonna get sorta expensive. By the looks of your numbers in your sig, you are asking for heads and cam to give you 170rwhp. That is Ls6 cam + valvetrain and supercharger territory really.


If you want to see someone that has been able to do this here ya go: https://ls1tech.com/forums/generatio...am-change.html

LilJayV10

iTrader: (39)

As others have said I don't you realize how much work goes into a 500rwhp motor. Is there any reason you picked that particular number? If you are serious about it I would contact Tony Mamo or Vengence. You aren't going to get there with a ported set of stock heads. You are going to need a ported FAST intake, TB, EWP, U/D pulley and so on. In other words it's going to be expensive.

If was easy you would see more people with that much power.

RacingTiger03

iTrader: (3)

500RWHP because thats what my dads 83 IROC Z had. I would love to show him how far things have come and how streetable a setup like that can be made now. Alas, as you guys point out, that gets very expensive. I am very flexible on that number; at the moment streetability is my #1 concern with whatever combo I fall onto.

So what could you guys come up with say 425-450RWHP, Ive seen a few "basic" heads/cam kits in that arena, just no idea of streetability on any of them.

Also for sake of keeping it realistic to what I will see, stock LS6 intake (01's came with that factory right?) and TB. As I mentioned I want to keep it looking stock to the eye, porting the intake is a possibility, but will not be happening at the same time. I like the RPMs the 3.42 gears have me at on the highway so until the formula leaves DD duty they will stay as well. (that or the 10 bolt gives in.. whichever comes first lol)

for statistics sake, does anyone know what type of head is best to go with value wise? I see a lot of the 5.3L heads in some kits on TSPs website, is that a viable option for my goals and something to grow with later?

SOMbitch

iTrader: (8)

Heads are what will make the power and you need an intake that will keep up (which no plastic ones really do great). TFS or AFR heads with a ported FAST IM is best. Then headers and a good catback. If you run a Y-pipe instead of true duals a burns or flowmaster merge will pay dvidends..... Get the best heads you can or you will just end up doing it over. Trust me on that....


There are a couple other good heads but bang for the buck they are the two best IMO....

Paint_It_Black

iTrader: (1)

The better heads you buy, the less cam you need to run, and the more streetable you'll be. I would look at some of the new afr 215's and Tony can set you up wiith a cam for your goals. Wanting to keep your gears, you will want a broader tq curve. Something like Tony's 224/228. Stay away from the big cams.

RacingTiger03

iTrader: (3)

I was considering a 228 on a 112 LSA to still have a fairly aggressive sound. With a set of AFR heads and that type cam what would I be looking at power wise? If I go that route rather than buying a package deal, what type of pushrods, lifters, and rockers should I be looking into?
Of course that runs way outside the budget I am trying to stay behind, so that likely isn't going to happen for me, but may be some good info for someone else. The AFR heads alone run ~$2500. At that point supercharging or nitrous would be more cost affective.

As for exhaust, the car is already set up on 2.5" duals w/ H-pipe.

garygnu

pm PAT-G or Tony Mamo ,they will tell you what it takes and how much.is there a dyno sheet for that 83 IROC,what parts did he use ?these ls engine are better engineered with better heads, alot easier to make power with the ls plat forum.

SOMbitch

iTrader: (8)

Then you don't really know what FI costs........

Buy the best heads you can afford and get a cam that matches.....

RacingTiger03

iTrader: (3)

SOM, I know the final cost would be much higher with all the supporting mods added to handle the extra oomph, so to speak, of FI. Even then a set of heads would do wonders to that too. Nitrous on the other hand for a 125 or 150 shot would be a lot cheaper, but the power wouldnt be there all the time particularly at part throttle, which is def not what I want. I rarely go to the track, I just love the extra power lol.

As for the IROC, I don't know all of the details, my dad would never give me all the info. I do know it had a 1200cfm carb, ~54cc combustion chamber, ported/polished heads, 3.73 gear with TH-350 through a 10 bolt, and a comp XE cam. I believe the heads were dart but I don't know for sure, this on a 355ci SBC.

gt35built

iTrader: (1)

01's did not come with a ls6 intake mani, they came with a ls1 engine....

And if your 500hp dyno number is your main concern, start thinking 1 7/8 headers, pricey heads (afr, tfs), big *** cam, ported fast and a 90mm.

Or you can think of a more budget based build (ls6 intake, gm heads). Still getting a nice low 4xx dyno number but better drivability, powerband, etc.

And your dads probably not telling you about the 150shot that gave him his 500whp status.