I what to get a set of heads for my 95 lt1. Looking at flow numbers between AI's 200cc trickflow heads and afr 1039 195cc compation port heads show afr with better numbers. I would like to turn into lt4 engine but would the afr's really work as well as the Ai's?

 

AI TFS heads will detsroy AFR CNC heads. Now if you buy the AFR 195's bare and have AI port them as well, they might be able to get similar results to their TFS heads. Thats something they could tell you.

 

Where are you seeing better numbers for the AFR's? Keep in mind AFR flows there heads on a larger bore and with a pipe.

http://www.advancedinduction.com/flo...1Flowsheet.jpg

http://www.airflowresearch.com/195sbc_lt4.php

 

afr's are old heads. not to say that their bad but if your going to dump 2-2.5k into heads dont get afr's. Go with stock castings or tfs. Le and ai can get a stock casting to flow 290cfm's and the tfs breaking into the low 300's.
As for the lt4, there is really no reason to do it. Its not going to make any more power than an lt1. If your goals are 400-430rwhp stick with 200cc ai heads or le3's. If you want 430+ than buy tfs heads with a converted or sheetmetal intake, monoblade tb, 12.1 comp, etc.
How many cubes will the motor be that these heads are going on?
Do you have a budget?
What do you consider to be streetable?
You need to give more information about your setup your looking to build. goals, budget, etc. Once you provide that you will get better answers. Because we dont know where to steer you.

 

I believe he is talking about the new AFR eliminator 195's. I think they are supposed to be a pretty good head. But like RealQuick has already said not as good as the AI TFS heads.

 

For $600 less than the AI TFS heads, I am considering the 195cc Eliminators for my build. I also want the larger chambers to drop compression for running boost.

 

the lower compression will help but are pistons will still f*u* cuz their junk. I understand why your looking at aftermarket heads to lower the comp but other people dont see the potential of a maxed out stock casting.
Just look at the thread going with 429rwhp, stock intake and a mis. That car will do 435-440rwhp when everything is finally done(ported intake,tuning, issues,etc). Not too bad for a motor that was designed in 1990 and 1991. And its the stock shortblock.
Spend your money where it counts most~heads.

 

I currently have AFR's, and if I could do it over I would have ported the factory castings. Call Advanced Induction.

 

That's one hell of an endorsement for AFR. Probably put them into backorder status.

FYI.... The Trick Flows that I own done by Lloyd and Trevor flow:

Intake Exhaust (no pipe)
.300 204 151
.400 259 186
.500 291 209
.600 304 218
.700 308 224

This is with a 222 cc intake port, 2.08 intake valves and 1.625 exhaust flowed on a very conservative flow bench. Think it was with a 4.06 bore. The valves were backcut for enhanced low flow numbers vs higher lift flow numbers. Only have .635 lift....so why emphasize the top end except to post some big number?? Should also add this is with small chambers for higher compression as larger chambers yield a tad higher flow numbers.

These heads are two years old and if I were to do new ones, I'd look real strongly at Brodix or Dart and probably do titanium intake valves to make it easy on the springs.

 

My plan is to build complete engine on a salvaged block. My thoughts are to spend 2500.00 on ai trickflows instead of 1400.00 on porting a weaker 12 year old heads seems to make sense to me.
I want to do all top end this winter on my own engine and work on picking up shortblock or 383 golen assembly next fall and winter.
I've want to spend 4grand this winter and roughly the same next year.
Myfinnal engine will be a forged 383 naturally aspirated.
Thoughts for now are , caddy lifters, lt4 timing chain, holley 58 body, ported heads, cc 1.6 roller rockers, hi tech push rods, cam and tune.Current mods are ram air hood edelbrork short headers ,corsa exaust.
Is there a compromising cumbustion chamber cc size that would work ok with my factory shortblock but still be good for 383.
Thanks

 

Darts, and have Bret Bauer work them over

 

I was working on a brand new set of AFR 210 eliminators yesterday. Their wet flow technology gets some great numbers. They came assembled and made it here in a couple of weeks. The runners are done very well compared to most i have seen and their rated numbers are right out of the box. Very very nice pieces. They have all the LS1 style valves and are tuliped and edges are rounded for increased flow. Installed height on springs were right on the money for each. Only thing we did was to clean up all the edges a bit so there were no chips to be dislodged and into the engine or oil pump. This should be done with any aftermarket set of heads. If you decide to go with these heads, don't spend the extra $$$ to clean up the CNC marks. They are very minimal and spending an hour with a drum would clean these up very easily. Overall, for 2k set of heads, got exactly what you would expect, basically a ready to bolt on head with great #'s.

Another route to go is with a little project I have been working on. I have a set of LE heads that I am going to bolt on and see what kind of gains they get over the as purchased LE heads. Currently the heads have been reworked through the guides. Drilled out the current guides to accept smaller sized ones to accommodate the new valves I will be running. They are Titanium LS1 valves. I will be using all titanium hardware as well. What this will do is create substantially less mass and allow for higher revs with a ton less valve float.
This is just something I am experimenting with and for those out there reading this, watch for my post come mid April to see the results. I suspect when all is said and done I will see flows as good as AFR 195's.

 

oh, sweet jesus. Now Bert is in the head business...couldn't be cylinder head business though...


Yep, go look up all his stellar results

 

Track #'s? And what makes a flow bench "stingy"? They all come with a calibration plate so there is no reason for it to be "stingy".

 

Who's Bert?