Ok I just bought a Stage III Head from Slow boy racing for my 99 eclipse RS and was wanderin what you guys thought. Its 100% hot tanked and fully pressure checked. It has SBR 5 angle competition valve job, SBR stage III port work, New valve stem seals, New stainless steel undercut valves, New valve guides, Crower springs and retainers, and a Fully decked Head srface. I was also wandering how much power that will give me. I also bought Headers a 2 and a 1/2 inch down pipe, high flow cat, 2 and a 1/2 inch catback with muffler and 4.5 inch tip, and Axis mod Sevens 18" wheels and tires. Still got to get the lowering springs but let me know what ya think. Thanks

You bought a header, not headers.

Sorry, just a pet peave of mine

I'm confused, sorry, but in your avatar pic it seems that you have a turbo, what exactly is a stage III head? because you also said you bought the header, are you planning on building your engine or go turbo?

The pic is when it was turbod but I decided to go N/A before I put a turbo on. So I took it off and sold it...I needed the money for court cost when I lost my liscence. And if you check out Slow boy racing they have 4 heads there for the 420a eclipse. stage I has a certain amount of things done to it and so does stage II and so on. the stage III is the one I bought and I listed everything that is done to it. When I get it alls I will have to do is have it shaved. The 4th head is just a rebuilt one. And I dint purchase the headers, My friend had a eclipse RS and when he blew it up he gave them to me. After I have the car built for all motor. Then I plan on turboing it.

damnit why do people always say "headers" you have a single "header" more commonly known as an exhaust manifold! Sorry for sounding mean but I can only take the same mistake so many times. The ONLY time you have "Headers" is when you have an engine in the V formation, because, obviously, there are 2 exhaust manifolds, AKA HEADERS.

Anyway, on topic:

I think you just spent a shitload of money on about 50hp if that.

Hay! Hay! Calm down Dude can't ya see he's from the eastern seaboard!!! :)
And he did not get 50 hp either, he got more like 10-15 at the crank.

if he's lucky.

I never understand why people go crazy with heads when they aren't racing.
IMO it's a waste of money because with the right turbo, fuel and a TOTALLY stock 420a head, intake manifold and throttle body you can make 400whp if the bottom end is built to handle it.

Sorry BJ I don't mean to be a douche, I just think you could have spent the money on something that will make more of a power difference

p.s. why are you shaving the head? it's already been flattened, thats what they mean when they say the head has been "decked"

A head gives more than 10-15 hp! And its brand new with alot of top performance $hit so when I go turbo ill have a brand new head. The block is coming a little later with the lower compression pistons. I will have a brand new motor. And dont bring up "Should have bought a stock turbo BLAH BLAH BLAH!" Because if that was what I wanted thats what I would have got. PLUS my stock head was cracked and a BRAND NEW HEAD with OEM parts is not much cheaper. Like 500 bucks maybe....but when I get the new head, (they said it would take 4 weeks) I am taking it to the dyno to see what I got. I will happily post the results! And with the Headers Header thing. Whats it matter really when you know what we are talking about? If you get upset about that I would hate for some one to make fun of you. I realized I wasnt going to shave it to. A head is a good investment in my eyes cause Ill have a built motor when I turbo it so I wont have to worry about blowing it! And I do plan on racing it down at Nashville super speedway. They let us race all night every other friday for 20 bucks.

what is the rest of your setup with this super head you just bought?

what do you mean?

what have you done to the bottom end and what is your turbo setup specs

the bottom end is the next thing I buy, Its a stage II block with crower rods and wiesco pistons (8:8:1) clevite rod bearings, clevite main bearings, ARP rod bolts, and the block surfaces are fully decked. The turbo is a hahn racecraft stage III turbo kit. all that is coming brand new so Ill have a brand new racing 420a engine with turbo. and I wasnt plannin on getting cams and cam gears but i dont guess it will hurt.

you must shit hundreds of dollars at a time. why are you investing so much in a 420a??

I dont shit hundreds, I was in a car accident and I get innuity checks. I got 20,000 dollars. And every so often I get one until the 20,000 in the bank is gone. The last check was 3500 this one was 4000. I am investing so much in the 420a because I got it last year in perfect shape! It is the rs but besides the sunroof and rear disc brakes its got power everythin and cruise control. I like it alot and EVERYONE says it will never be fast. And I like to prove people wrong! So I started investing into it and its finally paying off. My wheels and tires come next week and my head comes in 4. I was going to returbo it but I didnt want to turbo a engine with 144,000 miles on it. And I didnt buy it new so no telling what hell its been through. So thats why I bought the bottom end and the stage III head is cause mines cracked.

all that head work with stock cams is like pissing in the wind. Cam gears are over rated

Please do post your dyno results, i'm very curious and hope i'm wrong, but try not to can't cheat if possible :P Don't put up the results after the turbo and say that the head increased you by 100hp. dyno it before the turbo with just the new head and bottom end.

my guess is that with your new head, and new bottom end, with stock OR bigger cams, no turbo, and pump gas you will be around 100 - 120hp at the wheels. It would be awesome if you got higher!

BTW, what are you using to tune?