15 degree heads for only $1,300!!
04-06-2005, 12:40 PM
#21
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LME told me a set of 18 degree heads, ran on a old Nascar Bush series car, with not much porting done to them, they had bought used for $2000, they did a valve job on them, and flowed 400CFM.... Ill be getting 15 degree heads, with 2.20 intake valves!
04-06-2005, 01:35 PM
#22
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I think one thing that would really help is valvetrain. There are plenty of guys dumping thousands into their top ends. At least from what I've seen online, it looks like half the hassle with going to a different valve angle is getting the valvetrain pieced together. If shops had 18-degree "packages" sort of like you can get a cam swap package, I would bet that there would be more people willing to try the swap.
Of course that still leaves headers, intake, carb / fuel injection out of the picture, but you get the idea...
Of course that still leaves headers, intake, carb / fuel injection out of the picture, but you get the idea...
04-06-2005, 02:29 PM
#23
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even just 18 degree setup, sold as a package, I'd be All over that..
18 degree Ready to run SBC heads converted to LT1, Cam, offest solid roller Lifters, pushrods, and shaft rockers. If sold as a package, that could be a very popular setup, everyone would want it. and the LT1 would once again reign supreme!!!!!!! good idea trax! Too bad I dont have a buisness lol
18 degree Ready to run SBC heads converted to LT1, Cam, offest solid roller Lifters, pushrods, and shaft rockers. If sold as a package, that could be a very popular setup, everyone would want it. and the LT1 would once again reign supreme!!!!!!! good idea trax! Too bad I dont have a buisness lol
04-06-2005, 04:19 PM
#24
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Originally Posted by FASTFATBOY
Just a little 411 for ya, there is a set of STOCK CASTING LT1 heads here in town that flow over 300 cfm with a 2.00/1.56 valve. 310 cfm on a LT4, I dont see any prblem with that...with the right hands on the grinder.
My Dad and I have a set of Pro-Action 235's, 23* that flow 330+ cfm@.700 on a conservative bench(West Coast Cylinder head) And could go a little further. And for about the same money as the 15* head this guy is looking at(with no port work) without all the exotic parts to make them work.
500 rwhp has been done more than once with a stroker LT1, stock intake, with a six speed.Dad and I gonna try and do it with a auto.
David
My Dad and I have a set of Pro-Action 235's, 23* that flow 330+ cfm@.700 on a conservative bench(West Coast Cylinder head) And could go a little further. And for about the same money as the 15* head this guy is looking at(with no port work) without all the exotic parts to make them work.
500 rwhp has been done more than once with a stroker LT1, stock intake, with a six speed.Dad and I gonna try and do it with a auto.
David
04-06-2005, 08:44 PM
#25
Originally Posted by Jordan57
I stand corrected...however I have never seen any flow charts on any stock castings flowing in the neighborhood of 300cfm even with larger valves. I just didn't think the stock heads had enough material to take out. Same with the LT4 heads. I know 500rwhp has been done on an LT1...just not as common as the 400rwhp plateau that people get hung up on. However with this setup the exotic of a setup perhaps in the 600rwhp-700rwhp would be the goal...which would be flat out nasty. BTW if you have a site for that 500rwhp with a stock intake I would love to see it. I just thought the intakes were way to restrictive to allow that sorta flow.
Then you can't watch my car run this year
STOCK LT1 castings with 210cc intake ports 
04-06-2005, 09:09 PM
#26
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You got 210 CCs out of a STOCK LT1 Head!? I thought I really hogged mine out, and only got 176 CCs.. When I do build this motor, I very well might put it in my 6 cylinder, It would tear me up to have two hot LT1s and only be able to use one at a time, and I would hate to start hacking up my already complete bracket car, If I just built say a 10.5W outlaw car out of my 6 cylinder, and I was to keep my Z28 the way it is, except swapped from my stock valve to a 2.02 stainless or something, would I see any HP improvement?
04-07-2005, 11:11 AM
#29
Here are my AFR210's that i had Lloyd Elliott port for me. Cost of heads, valvetrain and full port, less than $2000. i bought the heads "as cast" from AFR. This means no port work at all.
Lloyd's AFR 210
.............Intake...Exhaust (no pipe)
0.200......143........103
0.300......204........141
0.400......247........173
0.500......281........198
0.600......308........219
0.700......311........227
Lloyd's AFR 210
.............Intake...Exhaust (no pipe)
0.200......143........103
0.300......204........141
0.400......247........173
0.500......281........198
0.600......308........219
0.700......311........227
04-07-2005, 11:19 AM
#30
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great numbers but like I said a 15 degree had has almost unlimimited flow potential, 400CFM isnt a crazy figure out of them. a 396 will never be able to fully utilize these heads unless it spins impossible RPMS,
04-07-2005, 11:21 AM
#31
Originally Posted by z28boysteve
great numbers but like I said a 15 degree had has almost unlimimited flow potential, 400CFM isnt a crazy figure out of them. a 396 will never be able to fully utilize these heads unless it spins impossible RPMS,
03-01-2011, 05:31 PM
#34
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Sounds like you guys are going to a lot of work to get fast, anybody interested in converting to N/A SB-2 heads? With the same changes as it will take to do all those other heads you can make 800+ HP/ 7500rpm and 550#TQ. That is what our ARCA engines make at 12:1 and 750 carb.
Jack up the cubes and compression and you should be pretty close to 900hp.
You need pistons, cam, lifters rockers and heads and intake of course. If you want to run FI gotta get a manifold and throttle body and FAST Cpu I guess.
I am a carb guy and can make them drive on the street and still make 850hp.
I have enough parts to really make some engines smoke...
I wanted to do my 94 z28 Cop car but I just got it back running after sitting in the shop for 4 years needing and opti-spark. It is bad when you can't even work on your own stuff.
As far as the 18* stuff goes, it is not the valve angle that makes the power it is the cylinder head port flow and fuel air quality. You can get 23* heads to make 800hp if you know what you are doing.
Those old junk Busch heads flowed at least 430cfm as that is what it took to make 725hp @ 9:1 CR & 390CFM Carb ( tiny ).
As far as big compression goes, if you want you can run 15:1 CR on E-85 and it only costs about $3.25 in Buford, GA. I run the stuff almost every day on my chassis dyno and it makes almost as much power as $25 Gallon VP ProStock fuel, cheapes power making gas is MS-109 and it costs about $12 gal.
You can hit me on my e-mail for more info
mancinelli@att.net
Jack up the cubes and compression and you should be pretty close to 900hp.
You need pistons, cam, lifters rockers and heads and intake of course. If you want to run FI gotta get a manifold and throttle body and FAST Cpu I guess.
I am a carb guy and can make them drive on the street and still make 850hp.
I have enough parts to really make some engines smoke...
I wanted to do my 94 z28 Cop car but I just got it back running after sitting in the shop for 4 years needing and opti-spark. It is bad when you can't even work on your own stuff.
As far as the 18* stuff goes, it is not the valve angle that makes the power it is the cylinder head port flow and fuel air quality. You can get 23* heads to make 800hp if you know what you are doing.
Those old junk Busch heads flowed at least 430cfm as that is what it took to make 725hp @ 9:1 CR & 390CFM Carb ( tiny ).
As far as big compression goes, if you want you can run 15:1 CR on E-85 and it only costs about $3.25 in Buford, GA. I run the stuff almost every day on my chassis dyno and it makes almost as much power as $25 Gallon VP ProStock fuel, cheapes power making gas is MS-109 and it costs about $12 gal.
You can hit me on my e-mail for more info
mancinelli@att.net
Last edited by raceman14; 03-01-2011 at 05:39 PM. Reason: spelling
15º heads in bare cast form and he thought they only needed a "cleaning up" and basic seats, guides and valve job. LT1 owners are amazing... 
03-02-2011, 07:51 AM
#39
btw these are no chumps, some really good builders here in town. They converted the set up to run the NASCAR HEADS. LOL, with a bigger cam and what not, car made more peak horsepower, and ran slower. But i hope your old NASCAR heads work out. Also you are aware that flow numbers dont mean everything...This coming out of the mouths of several very good engine builders
