topbrent

iTrader: (1)

Truthfully, I think I was most impressed with the strong performance of the stock LS3/L92 heads in this application.

I think the real winner here is the the kick-*** 468 shortblock!

Spend the cash on that shortblock...use some cheap LS3/L92 heads (common as water, $500.00 used)and enjoy the 692hp for a few years.

After you have paid your chiropractor for all the neck and spine adjustments, save your lunch money for a few years, then buy something like the MAST heads and bolt on 70hp for the more impressive (albeit $$$) gains.

Or save the $$$ and just hit it with a tiny 75 shot of nitrous when needed.

stinkybutt

I was impressed with the stock LS3 heads performance. For the guy on a tight budget and a cost of $330 each.mmmmmm. These are the heads Car Craft made 550 horse with a 6.0 and carb. Of course these heads don't concern someone building an engine like Hot Rod used to compare the "Big Dog" rec port heads.
Aleck

1CAMWNDR

iTrader: (21)

Man I need to sell my Cartek Stage 5X 243s (2.055/1.60) and unported cathedral Victor Jr. for some LS3s and (LS3)Victor Jr. Even unported the heads and intake are better..............

Jimbo1367

There wasn't a BIG difference in my eyes. The cathedril port head swap test seamed more dramatic to me. Power wise and the type of a engine the general public might build. What percent of us are going to build a 4.250 stroke LSx? I think HotRod dropped the ball on the rectangle port head challange. If I was building a LS3 or larger stroker and had a LS3 intake already, I'd just get stock LS3 heads and call it a day.

I hope TSP and TFS LS3 heads are ALOT better than stock.

crossbreed383

iTrader: (1)

I still find it interesting that there is this mistique with rec port heads,yet Tooleys engine made 705 with less cubes,head,and camshaft
Just think if Brians engine ran a ported super vic ,with more cma and compression along with a dominator,,he may have made close to what this square port test showed ,with a much larger head and intake package
Once again i think it shows how ls3 heads arent the ned all like some make them out to be

bozzhawg

So what heads are you running currently?
Any et's?
setup etc...?

What heads would you have run or have run?

have you ran or made passes with the LS3's/L92's?

Seems like you have a lot of knowledge, just curious...... I am curious or what is your explanation behind the statements you have been making... Hell maybe you know something we all don't know...... elaborate if you could.....

Bozz

Bill00Formula

iTrader: (4)

I wonder why no LS7 heads weren't used?

crossbreed383

iTrader: (1)

So what heads are you running currently?
Any et's?
setup etc...?

What heads would you have run or have run?

have you ran or made passes with the LS3's/L92's?

Seems like you have a lot of knowledge, just curious...... I am curious or what is your explanation behind the statements you have been making... Hell maybe you know something we all don't know...... elaborate if you could.....

Bozz


Well this was my old combo
Pump gas flat top 380" in gen 1 motor at 8500+ ft density altitude
Now building 14.7 comp 410 in ls based deal with solid roller,TFS 245 heads with some extra hand porting,ported supervic with carb,blah blah ,etc., with a crossbar plate for some 10.5 racing
What knowledge of mine would you like to discuss?

Brian Tooley Racing

iTrader: (13)

Let's look at the numbers, my engine making 705 at 454 cu in equals 1.55 hp/cu in.

With a Fast intake the Hot Rod 468 engine made 732 hp equals 1.56 hp/cu in.

So there you have it, if you go with the BIG heads, more compression and more cam you can make .01 hp/cu in more

bozzhawg

Cool, so its TFS for you..... should be a good setup... real men run solids rollers...lol I see alot of kids want to turn these things up to 7500+, I tell em, throw a solid in, and the scooby doo expression comes on....
Thats the compromise a lot of guys want the braun but don't really want what comes with it......

good luck on the build

I thought you must have had a bad experience with the LS3/L92's so thats why I asked.......based on some of your comments


Bozz

crossbreed383

iTrader: (1)

No bad ls3 experiences here
Actually,ive helped a couple of friends build some ls7 based stuff and they run very hard
But i think ls3, stuff works well ,cuz everyone seems to run little weenie port cathedral ports on large cube engines, and when they get the same results as everyone else before them ,.then they assume thats all cath ports are worth
So the nexy guy builds a ls3 based 408 or so,and makes some more power, so,now the ls3 head must be better?
Or is it that the cath port 400in and up motors are underheaded from the get go?
Theres a correct size port for every engine,and if the head is correctly sized for the engine ,i dont really think it matters what shape the runner is lol

4U2BNVS

iTrader: (2)

They don't say in the article, but anyone know what block they put the darton sleeves in? Was it the LS3?

Steve - Race Eng

iTrader: (1)

The block I did for Hot Rod was an LS6. Worked out well considering the recommended sleeve max. bore is 4.160" and they pushed them to 4.185". We have a different part number larger bore (4.170" to 4.200") sleeves for 4.185" bore.

Steve

LCBE

im glad to see the the procomp cnc didn't win. it seems richard holdner and procomp are in bed together.


EDIT: He uses their products quite often. I'm not implying he skewed numbers.

Brian Tooley Racing

iTrader: (13)

It's been said that TEA and Richard Holdener are in bed together, it seems that whoever wins a particular shootout is in bed with Richard. There have been PLENTY of dyno articles that Richard has done that the Pro Comp heads didn't win. As a matter of fact, the cathedral Hot Rod test is the first one that Pro Comp finished in the top of any category. What that story does tell you, if you're paying attention, is that combination is King!

I've been sending Richard heads since 2002 when TEA won the 200-225 cc Ford head shootout on a 427 in MM&FF. We beat the Kasse canted valve heads by 30 hp with a pair of TFS Twisted Wedge R 225 heads. Everyone in the Ford world cried foul, and called BS on the test. Richard spent the time to do a A-B-A test just to make sure, since the Kasse head actually flowed more air, he couldn't believe they made less power.

He has NEVER hinted at doing anything unethical, he is one of the hardest working and most honest people I know. To disrespect his hard work with that type of rumor is igorance at it's worst.

Brian Tooley Racing

iTrader: (13)

Do those sleeves go into water in that block?

If you sleeve any LS2 block, including a 5.3, do the sleeves go into water?

What do you charge for the machine work and what do you charge for the sleeves?

Thanks Steve

Richard@WCCH

iTrader: (3)

I just finished reading the article and would like to thank Richard for inviting us to participate. This test involved quite a bit of work in a short time and his attention to details should be commended. Work scheduling had us delivering heads at the last minute. I don't think the UPS truck left their driveway before our heads were bolted on and ready for testing!!
All the tested heads offered impressive results over the factory heads. Hot rodders now have a variety of choices spread across different price ranges.

Brian, thanks for posting this thead. Nice work!

Richard

hymey

Even if this engine only makes 1.56 hp per cube i bet if the bore/stroke ratio were different would be a much different story.The 4.25 crank will never make a hp hero. You gotta turn it to make power. We made 900hp with 23 deg heads on similiar cubes with a 280 deg duration cam on a relatively short stroke and only 12:1 compression which is nothing for this cam.

crossbreed383

iTrader: (1)

Quoted from HYMEY" We made 900hp with 23 deg heads on similiar cubes with a 280 deg duration cam on a relatively short stroke and only 12:1 compression which is nothing for this "

Wow,seems rather optimistic for a 23 motor!

Jimbo1367

If I was building a motor from scratch, I'd seriously concider PRC237cc heads. I really liked the Cathedral port head challange. It was a nice surprize. Big power from such a small motor. I see why Brian Pooley has a hard-on the cathedril port heads.

I wish someone would do a flow test on FAST102 cathedrill vs. FAST102rect (whatever they are calling the LS3 mani)

I am wondering if the cathril one flows better.