NightHawwk

iTrader: (2)

Hello all you F-Ballers!

Ok, so here is the deal. I have been offered a set of LS2 Heads and Comp Cams 580/588 lift (duration as of yet unreported) and I need your seasoned and expert opinions as I am a lowly and humble newbie newberson.

First, the price: $450 for the heads and $180 for the cam. I have seen these heads at this price on eBay but I don't know about the cam. Seems like a decent-good price.

Second, the performance: What would I expect to gain on a stock LS1 motor? Would I sacrifice drivability? Does the cam complement the heads well? Would this give me the lopey terrifying idle I crave? Is the entire car going to shake as this turns the motor over?

Third, reaching goals: I want to build a 450-500 hp LS1 motor on H/C/Bolt-ons that can run 11.5-12 second quarters. Can this even be accomplished? Would you recommend this H/C duo for this goal?

Sorry for all the questions but it will reduce the number of follow-up questions to annoy you with. If you need more information with which to educate me please ask!

03Sssnake

iTrader: (20)

LS2 heads = 243/799 heads. You can expect around 20+ RWHP from the heads alone. Find out the full specs on the cam. Those heads untouched with a decent sized cam will get you close to those goals. Are you running an LS6 intake manifold, what gear, longtubes/exhaust? Drivability all comes down to the tuner, if they only tune for WOT and hand you the keys, you are going to hate the car. You will want someone to street tune and dyno tune a H/C combo.

spy2520

iTrader: (3)

do ls2 heads fit on small bore (ls1 and ls6 blocks)?

03Sssnake

iTrader: (20)

Yes, 243/799 heads work just fine on LS1/LS6. The 243s came on LS6s.

NightHawwk

iTrader: (2)

Yes to LS6 intake, stock gear, 3.43 I believe on M6, plan on longtube exhaust with true dual. Would you recommend 1 7/8 primaries for this?

03Sssnake

iTrader: (20)

I would do 1 7/8 LTs from Texas Speed, they Stainless Steel and very nice, around 499. Your 3.42s would be fine with smaller cams, if you go bigger, probably want 3.73, 3.90 or even 4.10.

NightHawwk

iTrader: (2)

So do you think these Heads and Cam are good with my setup/for my goals or should I hold out for a different heads or cam? I don't have to buy as a package deal.

Also, I just talked to the seller, he has a part number and will get me the specs later on tonight. So I will post them on here tomorrow.

Thanks for your help by the way!

03Sssnake

iTrader: (20)

Those are great factory heads, would definitely do those. Does that price include springs and valves? What springs? Hard to comment on the cam without the full specs

NightHawwk

iTrader: (2)

Price is sans-supporting hardware

NightHawwk

iTrader: (2)

Turns out the cam is a comp cams xr281hr-12, it is 228/230 571/573 lift and a 112 lsa. From what I understand this is a medium cam, so a setup with this H&C would not be enough to require a gear change on the M6? What about clutch & rear end? What kind of power would I be looking at for a full bolt-on stock motor LS1? With supporting hardware and a tune, could this setup see 450hp with decent street manners?

Again, these heads are LS2, 243/799. I really appreciate the input from the seasoned members here.

bww3588

iTrader: (49)

You will not hit 450 500 with that cam and stock ls6 heads. Fully ported heads, larger cam, and a fast intake will get you closer. With all that, you could come close to 475.

Oh, and You will want 4.10 gears for any cam worth it's weight in ****.

INMY01TA

iTrader: (1)

As he said ^^ you won't see 450rwhp but for the price is a good setup. You could spend more and get more hp but I don't think you'll be disappointed. Probably around the 400 mark. I'd do 4:10 gears for even a bolt on M6, I did as a matter of fact. I always recommend a rear swap to 12 bolt or 9", not worth changing the gears/putting money in the stock rear.

1961ba427

iTrader: (26)

Well said....especially that last sentence.

NightHawwk

iTrader: (2)

Thanks for the input. I was weighing the cost option of these parts but I want it done right the first time so I am going to wait until I can afford a better setup. 100% agree on upgrading the rear before doing any H/C upgrades as well.

01transampower

iTrader: (9)

I just put a set of 799's on my car and a Texas Speed Torquer V.2 on my car and am running a stock rear end still. Yes do i worry about it popping every time i put the slicks and take to the track but in my opinon don't replace it unless its broke. Especially with the rear-end. $2500 can buy you a nice heads and cam set up. I got a buddy running mid 11's on a stock 10 bolt and t-5(89 iroc) so it's hit or miss with 10 bolts. I would personaly buy the heads and port them. Then wait to buy a bigger cam when your ready. My neighbor took his set of 243's to 890 rwhp on his SS Trailblazer. Testiment to the power they can handel.

bww3588

iTrader: (49)

I agree with you to a point. I'd rather replace the rear before it's broken. Then I can sell it to off set the cost of a new one.

bigken

iTrader: (8)

Yea it's not as big a cam as I thought but it's bigger than what is in my car as mine is a 566/568 222/224 @ 112 and I have Patriot heads with 1.8 rockers which helps the lift a little. No worries if you dont want them bro go with what you will be happy with I think since you don't want them and my buddy can't afford to finish his motor I am thinking about finishing the motor myself and putting it in a roller. Let me know if you still want to do those head rests. As far as dropping all that money on the rear first I don't agree with that, if you rebuild it with new gears it will hold and replace it when and or if it breaks. I am hard on mine as that's why I built the car and it's a stock rear I rebuilt with 373s and I have had no problems granted I have an auto.

NightHawwk

iTrader: (2)

Yeah bigken thanks for coming and chiming in on this. Unfortunately the cam is not going to suit my overall goals as well as I would like, but I do wish I was further along in my build to justify buying those heads off ya. Best of luck with your motor build, that thing sounds like a beast! Definitely interested in those headrests but I will PM you about those.

bigken

iTrader: (8)

Not a problem bro, the cam is smaller then I thought it was but I never really looked at it since it wasnt for my motor. Be in touch bro and good luck with your future mods and if you have any questions just let me know.

2win_SS

iTrader: (1)

Do the heads come with springs valves and all valvetrain? I u plan on porting... Then DNT buy those heads.... After u buy heads. Port and buy springs you will put out more money than needed... Buy PRC 2.5 heads from TSP... cheaper. Everything NEW. plus u get Double springs to handle whatever can u throw in... Like the TorqV2 mentioned.

While your doin heads and cam DNT forget about Injectors, timing chain and oil pump... I would just go thru TSP for everything! Call em up. Tell them your goals and they will help you with your build...