I'm trying to pick a set of heads but I can't decide which to get. I will have the heads ported by someone local so I pretty much am just picking a set of heads to use as a starting point.

So far I'm thinking of getting a set of Darts or a set of LS6 heads. Does it really matter which I choose to get if they will be reworked anyways?

 

wish I could change the title of this.. maybe then I could get someone to reply

 

Starting with a set of 243 castings would be cheaper than starting with a set of Dart head. We can do brand new 243's for $395.00 per pair bare. The advantage to starting with a Dart head would be a small runner that already flows better than the 243.

 

Unless the porting is cheap, It almost better to get a set of new cnc ported ehads. This way you know exactly what you are getting and comes close to the same price. No down time either, but If you are stuck on going your route, jsut get some used 243 castings. Take em to the shop and ahve them completely go over them. This is your best bet, check the classifieds and you could get some cheap. Or even get some low mile used ported heads. Alot of guys who sell them on here will get them refreshed before they have them for sale, so they are virtually new ported heads with half the cost. Lots of choices, good luck.

 

243 heads chris.

 

Hey Chris,

We can help you out, I done a bunch of these heads; the 243's are good if you can find a good used set or if you have them on your car. I have a set in the shop I could port and set-up for you, then we could just do a core ex-change for your heads. This way your car would be down as long. Also depending on your budget and how much work you want to do the L92 heads are great. We have them flowing 370cfm you will have to change over to the L92 manifold but all in all it's not a lot of money for what you get. If you could give me a call I would be happy to go over your options.

Thanks,
Harold
Port Pros LLC
512-257-0222

 

I saw your flow number comparison, AFR v Patriot v PortPros

Do you have dyno numbers for comparison?

 

That's not a bad deal on those 243s.

I was really leaning toward a set of darts

 

If you have any questions, please let us know.

 

Good porting is almost never cheap. That's just the way it works to get something good you have to be willing to pay. This is something I've learned over the years

 

I have a spare set of 853's i just disassembled. Aside from one guide needing replacement. How much would a straight p&p be? Doesn't have to be an exchange cuz they are 853's, i wouldn't expect you to give up a set of 243's.

I also have a set 241's on the car that i would be doing the same thing to. Once i get the 853's on.

I can send valves, springs, etc. if you would be willing to do the valve job/assembly as well.

You can PM if you would rather not quote specific prices on the open net

 

To CNC port your heads, hand blend, do our 5 angle valve job, and mill to your specs, will run $625.00. If you have any questions, just let us know.

 

ported 241's will outflow proted 243's up to 400...where do plan on spending your time lift wise,,under or over 400?....food for thought

 

Cool thanks alot. I'll be able to send out the first set in about a month or two. I will deff. save your number.

Is this a proven thing or a matter of the quality of the porting?

 

by me?, no

By Chris Ednres, in his book Chevy LS1/LS6 Performance, Page 70,,,,yes, He worked with Agostino Racing Engines in toronto doing airflow testing with different heads / intakes. ,,,in reference to my statement,,both heads ported and used with an LS6 intake,,the 241's flowed more until .400

 

,,even after the .400,,the gain of the LS6, or 243's is minimal,,

-----241's 243's,,,,both ported, and both using the LS6 intake,,,,
200 166 153
300 211 202
350 229 222
400 244 241
450 257 257
500 269 270
550 277 280
600 283 289

 

HOLY SHITOLY,,625.00 to do my heads??? Thats pretty sweet with all those extras,,,,did I read that wrong?

 

Nope i'm doing that **** and popping for the gold spring kit w/ Ti retainers and stem seals while i'm at it. ($255 for daul springs, Ti retainers, stem seals, etc)
If i sell the Ti. retainers i have for $125 i'll get everthing for $750!!! Tell me that's not a freaking deal for cnc'd heads w/ .625 lift dual springs, etc.!!!

 

What's your time frame, I am pulling a set of Dart 205's next spring.

 

400 lift is nothing, I might as well keep the stock cam in there for that. I'll have a cam spec'd for the setup I'll be running and I can assure you that the lift will be well over 400


You show me more than one test for heads that show the same results or similar than I will believe it. Just because one shop or one person had those results doesn't mean it's proven to work like that all the time.

Some people have seen 400 rwhp from a Thunder 224 cam does that mean that everone using that cam everyone will see 400hp? Just because one person has seen it or done it doesn't mean its proven to be true or common