Marc 85Z28

Less than you would with a set of stage 2 GTP heads, and the GTPs are cheaper too!

Kraest

Budget heads make budget power.

True story

I wouldn't **** with 5.3L heads, nor would I **** with LS1 heads. From what I've seen, LS6 heads (243 castings) or aftermarket heads make the most power by a long shot.

You can get 28# injectors off of a 98, 2001, or 2002 F-body and the same year Corvettes also 03-04, however, you may still run out of injector if you put some decent heads on there. I had to use 30# SVO injectors on my heads/cam build for my C5. The 28s wouldn't keep up with 471rwhp. Also, if you're looking to make that kind of power, you can look to spend another $250 on a Racetronix Fuel system. A 155 lph fuel pump is only good for around 500 crank horsepower.

Mike

teke184

450rwhp is my ulimate goal....but i'm flexable.

the way things are going, and priorities changing...i'm not in a rush to hit that.

430rwhp would do nicely....especially if i can get it tuned to run as smooth as everyone with similar cams does.

i'd love to do TFS or similar heads...but its not gonna happen.

since i'm on a tight budget....budget power will have to suffice i guess.


so you think i'd better off with the dart 205s, or the stg 2.5 5.3L heads? again i'm looking for a fun street car....not a dyno queen or track car.

Marc 85Z28

Darts don't make power unless they're heavily ported. And if you're going to port the heads, you'll end up with runners the same size and identical flow ratings as a stock casting, but for about $1000 more.

There is nothing wrong with PRCs stage 2.5 5.3L heads. Many people are making impressive power with them with track times to back it up - myself included. And the port redesign shrunk the runners to 220cc, which helps maintain throttle response at lower RPMs.

Kraest's claim that budget heads make budget power was true several years ago. The PRC and Livernois "budget" heads today are running right with the heads that cost $1000-$1500 more, the only sacrifice being about 10cc runner volume.

Stay away from Patriot.

Greed4Speed

Don't leave out TEA's 5.3 stage 1.5. There have been some pretty quick cars with those heads. That is if you think low 11's high 10's is pretty quick for a streetable car like I think so.

I've also seen a couple of local C5's dyno 460's-470's NA w/ported LS1 heads. Plus the MTI and GTP LS1 heads have been on some quick cars too.

teke184

numbers on the TEA stuff look impressive. but they don't list what the runner sizes are.

i emailed them....we'll see what they say.

AL SS590 M6

What kind of drugs are you on?? I want some. The car is the sig has ''as cast'' Dart Pro1 225s on it and a 228-236 cam.

go to a HP calculator and see how much hp it takes to get a 3340 lb car to run 11 flat at 122mph.

And the Darts were $1400 delivered to the door with head gaskets.

Marc 85Z28

Reality drugs. I've seen both the 205 and 225 Darts out of the box, on the flow bench and on a shop test car. Flow numbers, dyno numbers, and track times were very poor - about on par with a Patriot head. AFR, TFS, PRC, and ETP seem to be the only heads that perform as advertised. Those times are nice, but my 3700lb car went identical times with a similar sized runner head and a cam 10 degrees smaller

HP calculator? I'll stick to real world results that I see with my own eyes...

Kraest

I agree with Al.

You're definetly on drugs

Check the car in my sig. 471rwhp with unported 225cc Darts. They flowed a TRUE 296 peak cfm on Larry Meaux's flowbench and made very decent mid numbers...I'm sure you know who that is.

The Dart 205s? A whole different story. My buddy picked up 18rwhp over his stock LS6 heads from a head swap. That's not very good IMO.

Stay away from Patriot? Check out the 408 in my sig. Those are with 240cc LS6 heads, which I haven't seem them offer since. Patriot is kind of hit or miss.

Mike

AL SS590 M6

So your saying that my car doesn't make good power? And that my track times are poor?
Well here's an open invite for you to come up to MI sometime where the DAs are never below sea level and put your car on the track beside mine so that you can school me on how poor my car runs.

Marc 85Z28

While we're making conditions... put 300lbs ballast in your car and put in on a 17" or 18" tire like I run and I'll consider the offer

So your combo works for you... great! All I said is that from my experience, those heads leave something to be desired.

Mike94ZLT1

AL SS590 M6

Looks like an absolute statement of fact, not an ''in my experience''.
I offered you proof that they do in fact make decent power as cast. Never said that they were the best head in the world. Just said that contrary to your above statement they don't need to be ported to work well.
Then you proceded to tell me how fast your car is with ''other unstated brand'' 220 cc runner heads being heavier than mine.

Why are you back pedaling now?
Saying I should add weight and change tires to make it fair to you. You made the claim that your car ran identical numbers to mine not me.

Marc 85Z28

You made the claim that my times were due to track conditions, and not my setup.

Darts ARE crap out of the box. If they were as great as you claim, for the price not a single person would consider any other head - period. They're not popular for a reason. Everyone else's aftermarket heads are extremely popular... You're right, they make "decent" power.

The "other unstated brand" is GTP (227 cc vs Dart 225) and they have proven time and time again to perform. Never seen a GTP headed LS1 that didn't perform.

You're obviously the bigger man here, offering up a challenge over the internet to someone 1000 miles away. But if you really want to make things interesting, I would consider a springtime trip if you make it worth my while $$ You'd be surprised what an 18" tired, naturally asprirated 346" 3700lb car can do right off the highway, even in your air

Oh, yeah, how's that HP calculator working for you?

I'm done ****ting up some other guys thread over this. If you want to continue, feel free to send a PM...

Kraest

The 243 castings were never budget. Only the "LS6-style" heads were.

Mike