00transamnh

iTrader: (1)

Is there such thing as budget heads... i cant see spending 1500-2000$ on just a set of heads

99ccz28

iTrader: (6)

TSP has some ls6 cncd heads for like 900 bucks...some people like them some people dont i guess...ive been thinking about getting some heads also..summit has dart heads for like 1300...there is actually a long thread comparing the two kinda

jlrz28

iTrader: (7)

I am happy with my TEA $1000 heads. Very good service!

https://ls1tech.com/forums/dynamometer-results-comparisons/492833-dyno-tea-5-7-stg1.html

2000PewterZ28

TSP ls6 heads!Thats the only way to go.

Ericbigmac83

iTrader: (19)

Can someone explain why the $2000+ heads are worth it, tsp heads are like 1200 and still flow 300 cfm up top, what am i missing that makes these other head so much better?

JZ'sTA

iTrader: (23)

You need to just read and learn.
Get you own oponions. Many feel they are worth it many feel they aren't.
There are 100's of threads you can read if you use the search button.

SVT THIS

iTrader: (27)

The advantage of the aftermarket cast heads (AFR/ETP/Dart/Trickflow) is that they have a smaller intake runner (usually) around 205cc, 215cc, 225cc etc., etc. They still are able to flow close to the "magical" 300 mark that the CNC LSx series heads flow which (I believe, correct me if I'm wrong) is in the 24xcc area after the CNC job. This makes for more air velocity in the head, helping power overall and under the curve hp/tq. You can also choose different combustion chamber sizes, etc. And in heads like the Trickflow and ETP heads they are cast on a different angle, which improves PV clearance over stock allowing for a larger cam to be run without valve reliefs set in the pistons. If you look at it, the UN-CNC'd aftermarket cast heads flow CLOSE to the larger intake runner CNC'd LSx style head, it would outflow it by a substantial number if you got it professionally ported/CNC'd.

This is what I have gathered from reading about the aftermarket cast heads on this forum. I believe the average power difference is 20-30 hp for budget heads and 50-60 hp for a good aftermarket cast head. Someone correct me if anything above is incorrect.

Ksett

My advice is don't buy them, because you can add all the gaskets, fluids, install and tune to that and be at $2200 after buying a set of $1k heads. If you want more it sounds like nitrous is in your budget.

UltraZLS1

iTrader: (13)

These tsp ls6 heads are making 440rwhp + if set up properly...w/out a fast 90/90...I have seen it happen twice now...not including my own results...which I think are very good also.

Torque?...well take a look at my dyno graph in the dyno section. The car has 370 rwtq at 2500 rpm on a mustang dyno.

If I had a fast 90/90 the torque would have carried even farther...the ls6 is choking me off a bit up top. I am pretty sure my car would be in the 450 rwhp/torque range with a fast 90/90 combo on a dyno jet. Who knows...it might even be close to that right now...Ill be going to a dyno jet very soon to find out
I'm glad I didnt spend 2200 bucks on afr's.
I got these heads shipped to my door for 1370 with springs, competition valve job and .040 cometics.

If you want some budget heads that will give the heads that cost literally twice as much a run for their money...then look no further.

Is another 10-20 rwhp even going to matter in a race?...I think not. It will be up to the driver.

If money is no object...well then of coarse get the best you can get. But for a lot of people...I think these heads are great.

Dan

iTrader: (1)

what's the chance of grenading the stock 10 bolt with 400rwhp in an auto?

Quik

iTrader: (7)

whats your SCR/DCR im weighing in the results of these heads for the buck. i want to hit 4xx/4xx with my setup

SVT THIS

iTrader: (27)

I'm not bashing the budget heads by any means. I think for the bang for the buck factor, the TSP LS6 CNC heads cannot be beaten. $1k with no core and a pretty proven dyno record (not sure about track times) is pretty good. You will see some good numbers, but your overall hp and torque numbers as well as area under the curve will be off a bit. However, if you are not trying to build an all out street/strip car and just want a strong performing daily driver, I'd go with the TSP (or TEA or Patriot) CNC LS6 heads.

Quik

iTrader: (7)

wats the difference between the GM CNC ls6 head and the TSP CNC LS6 head besides the money

SVT THIS

iTrader: (27)

I don't know anything about the GM CNC heads but I imagine there is slightly different valve work and techniques that make TSP's flow numbers a little higher. GM's may have higher flow numbers, but out of all the sponsors with CNC LS6 heads TSP's seem to have slightly more (<10) flow numbers at .600 so I just imagine that TSP's outflow GMs.

BTW Quik, your truck is awesome

UltraZLS1

iTrader: (13)

static is about 11 to 1 and the dynamic is a little bit over 8.6. I wouldnt try and go much higher than around 8.7-8.8 for dcr on pump gas...especially if you dont have any 93 octane. And altitude also effects this...I think the higher up you are the less you can get away with also.