OK...I will certainly agree with that and I might have taken what you said in the wrong context....I apologize if I did.

Just know that these results were completely legit with out of the box production 195 Eliminator street heads. The test was conducted at Westech Performance in Mira Loma, CA on a dyno I have used for years (SF902 SuperFlow) that provides legit results (and repeatable results) time and time again. It is a premium dyno facility with two engine dyno cells and a chassis dyno as well.

The magazine article will simply provide more info I haven't even shared with you guys including graghs and charts etc. and will make for good reading I'm sure.

Thanks,
Tony

 

Give me a set to test then it's legit

 

Wow...now I am looking forward to getting a set myself...Gonna have to figure out a intake.

 

Yes send me a set, and I'll do 3rd party testing for you

 

Single Plane.

 

I completely agree with what Tony has said..... Everybody gets caught up in peak numbers.... mid lift #'s are more important and velocity thru the port is EXTREMELY important but unmeasureable..... My old LT1 castings that were stage 2 ported flowed 258 intake at .550 and 203 exhaust at .550... midlift numbers weren't anything to write your mom about but okay..... Those heads on my 355 made 422 horsepower to the tires!!!! Nothing exotic just okay flowing heads and a good combo of parts.... If you are running out the box AFR 227's and you can't exceed 500RWHP something is probably wrong with your combo.... Cause 308 cfm at .700 and mid 230's on the exhaust is plenty enough air to support 500RWHP...... You can't compare 23 degree heads with the best heads the LS1's have to offer.... 15 degree valve angles will do that to any head... If you want sick flow then step up to the 215 RR's......

 

Okay, What manifold will work with these heads, in regards to LT1/4's, and what is the port size for headers sake. I am refinancing my house, Will sel the first borne to get better than 280/180 heads I have now.

 

I'd imagine the street heads (190 and 195's) will work with the LTx style manifolds (LT1 and LT4).... After that the 210s and 220's/227's would be seriously restricted with a LTx style manifold.... for that I'd go single plane.... feed those heads the air they need....

 

Yeah like Tony said 320-330 cfm on intake isn't happening for real on true 23 degree chevys on anywhere near that small an intake runner or valve. We've done 23 degree stuff at the school for years and the heads that DO flow in that range are much bigger and have bigger valves and are also usually on a bigger bore as well. We've had quite a few "330 cfm 23 degrees" go 280s max at the school.

 

LOL....Sounds all to familiar.

Usually ruins the owner's day but at least he just found out why his car won't run the number.

Tony

 

Neo is always here to help!

 

Is that $1400 assembled with valves, and springs, ect? If so, what springs (what lift are they good too and how aggresive of a cam can they handle?)

 

So tony, what would you say the 23 degree LT4 heads (the older castings) flow with a 4.00" bore and 28" of water????? Competition port with the 2.10/1.60 valves???? Are they clearing 300 cfm?????

 

Here is a dyno of there old vs new 195 heads. Granted its not an LTx motor, but it is showing the difference. I cant understand the massive drop after 6000rpm, doesnt look like valve float etc, just looks like they shut down. Pretty good size cam though. The company is American Speed in Illinois.
http://www.ls1camaro.net/freehosting...on%20Graph.jpg

 

i am sooo late to this post but i am glad cause the info i just read just saved me a bunch of cash!i do have a question though,the larger heads offered for the LT1/4 do they come with the water ports out back like the original Lt1/4 and what CC are they available in?this may have been discussed so please dont flame me.
thanks AFR

 

Alright well lets just look what else is out there already...

"220cc should be over 320cfm at .600

Says here the new 220 out flows the old 227's"

Something I want to see on a real bench because most times it doesn't do that, but if it comes within 10cfm it will be good. Just me and my experience so don't shoot me if I don't believe every posted flow number I see.

Here are some examples of some stuff I know works and flows and this IN CAST IRON!

Rons Porting Service http://www.ronsportingservice.com/products-dart.htm
Dart Platinum 23º
INTAKE EXHAUST
.200 152 111
.300 203 149
.400 250 182
.500 288 215
.600 308 229
.700 317 242
.750 321 246

2.050 Intake Valve with a 32º Backcut
1.600 Exhaust Valve with a 32º Backcut

69CC Chambers
220CC Intake Port

FWIW I don't think numbers under 20% of the valve diameter mean much 90% of the time in a high performance motor for making HP, but you can all beleive what you want.

If you are going with something with a offset PR restriction or "pinch" and standard port height then they should be able to hang with these.

http://www.ronsportingservice.com/im...ck1x-specs.htm

Let's not even get into RR stuff because 95% of the guys that run those don't do it on a 4.030" bore, or hell even LS stuff because I've seen small OEM stuff make aftermarket stuff look silly when done right.

Guys I'm sure these will be better than the old ones, but untill they make some silly numbers on the dyno lets not jump out of our panties. Flow numbers don't mean everything, i've taken 270-290cfm heads and made 600+ HP with everything from dinky cams to race solid rollers.

Bret

 

I'm that 5%

Tony: IMO a head of that caliber being a 227cc 23deg head i'd hope would flow 330 after all is said and done... After the comp port is done on the cnc are they still 227? or larger? i'm really not all too familiar w/ afr's stuff since i went w/ a gen 1 style RR head..

 

Steve I know, yours flow killer for that small of a bore which is the real limitation.

Bret

 

Jeez, I don't think I've ever seen so much truth in one paragraph on an internet board. Everybody has a 300+ cfm head, until they put them on an accurate flowbench. I've seen some AFR Comp ported 220 and 227's flow in the 290's, which I thought was extremely impressive. Other than that, it's a rare 23 deg, standard port location head that will break 300. Even a set of one-off race ported GTP LS1 heads flowed 32X cfm, but on a 4.125" bore. Put them on the 3.9" LS1 bore, and even they dropped below 300. I gotta agree with Bret on one thing, though, I have seen lots of 600 - 650 hp motors that used heads in the 280 cfm range.

Mike

 

Well after reading this forum here, AFR needs some customer service help. Especially advertising 100hp claims which arent true.
http://forums.corvetteforum.com/show....php?t=1492086