NitrousJunkie

iTrader: (5)

Who out there makes heads for an Lt1, I know you can convert almost any head to reverse flow cooling, but who makes heads right out of the box that flow great on an Lt1, I'm talking 300CFM at .600 at least, is there any?

Chris

BizZzatch350

iTrader: (33)

If you want straight box to car go with some big AFRs, or go with some Darts, or a number of other heads for a SBC and have LME convert them.

GhostZ

I don't think I've seen any of the AFR 220's flow that high out of the box. I've seen some AFR castings that worked by Race Prep www.race-prep.com that flow over 300 at .600.

Does your setup justify those heads? Remember it's not all about flow but about velocity as well.

SAPPER

iTrader: (10)

over .300...WOW. must be an NA solid roller set up or FI. I doubt you will find an "out-of-box" set with those flow #'s. basically, any reputable service, AFR, TEA, Race-prep, etc can make the heads flow that much. But if you wanna flow that much, have the dinero ready.

NitrousJunkie

iTrader: (5)

well whats a good set of AFR's flow? 270+? I wouldnt prolly need to flow that much, I plan on running the GM847 with a progressive 200+ Shot, I know my ole Lt1 heads flow at best 215 and I'd rather just get some new heads instead of messing around getting the stock ones worked on,also what would be a good valve size for this setup? M6/GM847/200+ Shot.

Chris

Mikey 97Z M6

iTrader: (37)

If you're going with a big hit of juice, def. consider the AFR's. They have some of the thickest decks in the industry. I'd buy em' bare, have a good porter work em' over by hand and assemble them myself. Probably save you some cash and you'll get exactly what you want out them that way.

Also, don't limit yourself to an off the shelf grind, especially if you're running a good shot of nitrous. Do yourself a favor and get a custom grind from FMS, Thunder Racing, or Cam Motion. I'll guarantee you'll make more power on, and off the bottle with a custom grind.

Mike

TwoFast4Lv

iTrader: (8)

There are many things that must be known before going forward on your quest.

First I would like to point out cubic inches are one of the biggest factors. A head that makes big power on a 350 will probably fall on its face at 5,800 on a 396

I happen to be working on a car that had a set of tunner heads that flowed a true 300CFM. BUT the volocity was to high and the heads were going turbulant. The car would flat line at 6,000 all the way to 7,000

CFM is not the best measuring tool at ALL times. It just happens to be the one most use.

I just had my heads re-worked to flow enough Volume to feed a few more cubic inches to my desired shift point(7,200). The heads where fine for a 350 and peaked around 6,800. When the math was finshed they would have only supported my new combination to 6,100 1,000 RPM short of my goal and probably 40hp shy.

We will see very soon if "my" combination is correct.

There are many good porters out there that can make a set of LT1 heads flow enough to make 400+RWHP on a 350.

Not nearly as many when the cubes go up

simple

iTrader: (8)

one other problem you will run into with ported heads is finding an intake mainfold to actually support the cfm that the heads can produce
LT1 intake just cant flow the same amount of air as a nice set of ported heads

ps many a stock ported heads flow over 270cfm at .600" lift (mine included)
but its the mid range numbers you want too really keep an eye on (.200"-.450" lift) since those areas are hit twice on any given valve event

Shawn MacAnanny

iTrader: (12)

I would suggest getting your stock heads ported by Lloyd Elliot. His stage 2 setup runs about $1500 to port your heads, put in bigger valves, stronger springs, and custom grind a cam for you. His stage 2 setup with bolt ons will dyno 400-420rwhp which is good for mid 11s. I would go Lloyd all the way. I have about 40 emails from him, and havent even bought his setup yet. He's the nicest guy, and will work with your needs to decide on what setup is best for you.

Here is all of the info you could ever want to know

http://web.camaross.com/forums/showt...=lloyd+elliott

RacinLT1

as far as box stock,i'd say afr 220/227,or 215RR if you want a custom intake. and definately go with a custom ground cam,forget the off the shelf stuff with good heads.

people always buy a cam,then try to match the heads to it,thats backwards,get the heads done,then get the cam that matches the flow,etc.

1SLO6

iTrader: (8)

I agree with getting a custom cam!, not an off the shelfer type. I have seen a set of stock ported heads with a custom gring produce 420 RWHP. If u have the cash go AFR if u ar eon a budget try either TPIS who has right now i beileve the best flowin head at .600 lift 280 cfm.

Nasty_T/A_GT

I second going with Lloyd, he is a good guy to work with and his heads are awesome.

TwoFast4Lv

iTrader: (8)

Hehehe

I usually do not mention that My new LT1 intake is about done and flows every bit as much as my new LE-X heads

MEAN LT1

iTrader: (2)

pics?

MILFhunter97

Darts

TwoFast4Lv

iTrader: (8)

soon very soon. it all goes into the machine shop this week for boring and assembly

Nasty_T/A_GT

Just for curiosity what does a stock intake flow? And how much does porting a stocker help?

Shawn MacAnanny

iTrader: (12)

They flow 215/150. Here's the info for each of lloyds specs.


Below is a basic run down on the head and cam packages. The best package will depend on HP goals, budget, rear gears, stall size, future plans, emissions, driving style, tuning ability, existing components, etc., etc, A phone call would be best to make sure that we can talk through these things and get a package that will work like you are wanting it to and also make sure that you have the complimenting parts to make each set up work.

I offer cam and head packager from $1100 to $1650.

-----------------------------------------------------------------------------------------------------

LE1 cam pulls from 2000 to 6200 RPM and should make 370-390 RWHP with matching heads, 30 lb injectors, 52 TB, 1 3/4 LTs, No cats, good tuning, etc. The heads are ported using stock valves, performance valve job, back cut valves, CM 612 springs, retainers and locks, milling, cleaning and assembly. These heads flow about 255/180 with a 195 cc intake port and stock LT1's flow about 215/150 with a 170 cc intake port.

Heads and cam are $1100 (plus shipping). This has the RPM range of the Hot Cam, CC 305, etc. but makes more HP and TQ over these cams through out the entire RPM range. This will work with any gear and converter but the track times will be better with a stall and some gear.

-------------------------------------------------------------------------------------------------------

LE2 cam pulls from 2200 to 6500 RPM and should make 400-420 RWHP with matching heads, 30-36 lb injectors, 52-58 mm TB, 1 3/4 LT's, no cats, GOOD tuning, etc. The heads are ported and machined for larger Ferrea 2.00/1.56 valves, matching springs (Comp 987/977 springs and Ti retainers or Bee Hive springs and CM retainers depending on lifter type and EXACT cam specs), locks, locators, milling, cleaning and assembly. These will flow about 270/190 with a 205 cc intake port.


Heads and cam are $1650 (plus shipping) and will need GOOD tuning. This has the RPM range of the CC 306 cam but will make more HP and TQ at peak and across the board. The REAL difference will be the LE2 cam will make TQ in the 2500 RPM range and the cc 306 doesn't start until way past this.

-----------------------------------------------------------------------------------------------------

LE3 cam pulls from 2600 to 6800 RPM in a 350 (2300 to 6500 RPM in a 383) and should make 410 to 430 RWHP with matching heads, 36-42 lb injectors, 58 TB or mono blade, GOOD tuning, etc, etc, etc. These are the same heads as above. This type of RPM requires a lot more spring pressure and will also need Comp R lifters to handle the spring pressure.

Heads and cam are $1650 (plus shipping) and will need GOOD tuning. This cam is similar to the GM 847 cam but makes about 10 more HP at peak and starts making HP sooner. Makes more HP and TQ across the board. Needs gear and converter to work well in a 350. Pretty much a racing cam for the 350 or a good street cam that will act like the LE2 in a 383.

-----------------------------------------------------------------------------------------------------

Everyone has a different opinion about what is streetable and what a safe RPM limit is for their engine.

If you are looking for just cylinder heads and with out a cam, the heads are priced at . . . . .

$750 for the LE1 heads only
$1300 for the LE2 heads only
$1300 for the LE3 heads only

Give me a call and I can help you pick a combo that you will be happy with.

Lloyd Elliott-------------------------------972-617-5671----------------------------Red Oak Tx 75154
NightTrain66@msn.com

Shawn MacAnanny

iTrader: (12)

Sorry, you meant intake manifold. I don't know, there are a few guys with over 600rwhp and have a stock intake. I wouldnt imagine porting it would do too much except to match the heads and allowed for a bigger throttle body.

simple

iTrader: (8)

from what i have gathered about the LT1 intakes, they flow in the ~230cfm range without any work done to them
ported runners and welded up "injector slopes", i would think a few more cfm is the norm but nothing like the cfm difference between ported and polished heads over a stock set (hard numbers i dont know about tho, maybe Lloyd will see this and give some actual numbers from his testing....?)

about the above mentioned 600+ rwhp number with a stock intake, you can bank on that number being made with either forced induction or nitrous....its not gonna happen NA with a stock LT1 intake (stock cube or stroker). it just cant physically support the needed airflow in stock form (possibly modded form either) too produce that kind of number