help pick my heads!!!
help pick my heads!!! I am building an LT4. The block is bored .030 over, complete forged bottom end, 4340 Forget Eagle crank, ect. LT4 intake, 58MM throttle body, canton racing oil pan, custom grind from comp, ect. My car is my daily driver, and im going with a 3600 lockup converter. Its an A4, with 3.23's in it. I am keeping the A4 and 3.23's. I am shooting for 450hp AT THE WHEELS. Yes, I do understand this is going to be a hard achievement, but Im gunning for it. It is my only car and therefor must be reliable. So far, I have decided on the 210CC LT4 AFR Racing Series Heads with the Competition Package. That is what AFR suggested I go for to achieve my goal. Does anyone have any better ideas to make my desired 450rwhp n/a??? Money is not really an issue, as I am allready financially scheduled to buy the $2600 AFR heads, so let me hear the ideas!!!!
one of 2 things need too be done
either lower your HP goal or sell the cam you have now and wait too get one after you have your heads
otherwise, i dont see your goal being achieved naturally aspirated
...people have done it but they are exceptions, not the norm (99.9999% of those who have done it with an LT1, arent daily drivers either)
that cam cant be that custom if you dont (havent decided on) have the heads
either lower your HP goal or sell the cam you have now and wait too get one after you have your heads
otherwise, i dont see your goal being achieved naturally aspirated
...people have done it but they are exceptions, not the norm (99.9999% of those who have done it with an LT1, arent daily drivers either)
that cam cant be that custom if you dont (havent decided on) have the heads
I was pretty decided on those heads when I ordered the cam. I am basically mocking a previous car, that saw 411 at the wheels on a CC306 cam, and a set of stage 1 MTI heads, and Shortie headers. I have upped it to Hooker Ceramic Long Tubes, and a custom cam that raises the lift almost 25 over the CC306, and the Competition Heads from AFR. Originally, the cam I picked was not going to be enough for those heads, so we went with a custom grind, and upped the anny... Im confident that the modifications being made, and mocking the previous motor (same machine shop, same builder, everything, and yes, I can verify the motor because it was my buddies) Ill see close, if not over 450rwhp. I am just trying to see if there is any other set of heads out there that will benifit me more than the Competition 210CC LT4's.
take the 210 or 220 bare castings, send them to Lloyd or AI (prolly lloyd, he'd do it cheaper and just as good of a job), port the LT4 intake to match, get a 58mm throttle body on the whole mess and some 30#+ injectors, a LOT of dyno tuning time and MAYBE ... MAYBE you'll hit 450rwhp
basically load $15k into the motor...
when you could've purchased a used LS1 car, stuck a cam and intake on it and be 75% of the way there for the same price....
IMO instead of going with all that LT4 stuff, hog out some LT1 heads and get a 8lb supercharger.... cheaper and the only way to keep up/beat the LS1 crowd....
basically load $15k into the motor...
when you could've purchased a used LS1 car, stuck a cam and intake on it and be 75% of the way there for the same price....
IMO instead of going with all that LT4 stuff, hog out some LT1 heads and get a 8lb supercharger.... cheaper and the only way to keep up/beat the LS1 crowd....
Im not getting rid of my car. Its a 30th in great condition. The intake will be ported to match, and by getting the bare castings, then getting them ported from another shop, and getting all of the parts, is way more $ than im looking for. I have 36# injectors, and have converted it over to OBD I, and no emissions. The car is going to Jeff Creeches, so the tuning will be done right. Im 90% confident shell see 450... just based on the previous motor.
As far as the supercharger... I want a NA motor for bragging rights. I dont want an LS1, because its to much fun beating them. I love it.
As far as the supercharger... I want a NA motor for bragging rights. I dont want an LS1, because its to much fun beating them. I love it.
you can pretty much guarantee he'll need 42lb injectors
my setup has 36's at 81% duty cycle (which is right around where you want the injectors at WOT)
i have ported stock heads by AI and cam from Lethal EFI and a 54mm TB, stock intake setup
my setup has 36's at 81% duty cycle (which is right around where you want the injectors at WOT)
i have ported stock heads by AI and cam from Lethal EFI and a 54mm TB, stock intake setup
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Verdad Gallardo I kinda figured the 36's wouldnt be enough... but removing the fuel rails just enough to replace the injectors isnt bad. The fuel pump is also going to be replaced with a warlboro 255 so i think im going to replace the injectors. who out there does better tuning then jeff???
what are you referring this statement to?
Originally Posted by slick1851
Loyd elloit, People you know this guy has been proven and Joe O also. So why do you even have to ask.
ive heard great things about them... and im doing it. They say the only thing wrong, is the tubing they come with is a little short, and has a tendency to come off... so if you just get one 3 inches longer or so youll be fine.
for the headwork, i vote Lloyd Elliot. with all other supporting mods u have listed, plus a few more, 450rw isn't a crazy goal....difficult to reach but possible. having a M6 dyno queen would make it a whole lot easier, lol!
Ok man, this is what I would do, Get a single plain intake with a 90mm TB setup for starter if your keeping it N/A, AI at advance induction is having a special right NOW on Bare AFR 210 heads at a KILLER PRICE. Get them bare buy the supporting mods for the heads and buy some 2.08 intake valves and send them to Llyod Elliot he should be able to get them in the 300-310 range at .600-.650 lift. That matched with a Ported converted Super Vic on say top of a mild 355 with a mild cam, will do 450RWHP in my opinion no problem as long as you have the Supporting mods, LT's, EWP, etc, and most importantly a good dyno Tune. 
I see why you want to keep the 3:23 gears but a 3600 may feel a little sluggish with that much stall, Then again you may like specially with 450+RWHP. IF you wanted to spend the coin you could have a Forged 383 or 396 setup, would make more HP and TQ and could put the spray into the mix, 650RWHP on say a 150-200 NX setup could be achievable.
Thats All I have to ramble about for now, lol
I see why you want to keep the 3:23 gears but a 3600 may feel a little sluggish with that much stall, Then again you may like specially with 450+RWHP. IF you wanted to spend the coin you could have a Forged 383 or 396 setup, would make more HP and TQ and could put the spray into the mix, 650RWHP on say a 150-200 NX setup could be achievable.Thats All I have to ramble about for now, lol
Ai has new pricing on their heads/cams.
I suggest you take a look at their website and think about the price. Please also note the words highlighted in RED on their website.
Ai Full port LT1 heads WITH a cam = $1,695
LE2 and cam = $1,650
LE3 (Much closer to Ai full ports) and cam = $1,850
Figure out what you want to spend...but there is no price argument or bargin argument between the two anymore. Yet there is a distinct performance arguement/difference.
I suggest you take a look at their website and think about the price. Please also note the words highlighted in RED on their website.
Ai Full port LT1 heads WITH a cam = $1,695
LE2 and cam = $1,650
LE3 (Much closer to Ai full ports) and cam = $1,850
Figure out what you want to spend...but there is no price argument or bargin argument between the two anymore. Yet there is a distinct performance arguement/difference.
For your goals, I dont think an LT1 casting will get it done without serious $$ money into the porting (possibly rewelding). I suggest a bare AFR210 head and ported by LE or AI (like everyone else said). I had LE port my AFR210's and they came out nice. They outflowed the Comp. AFR210's on the intake side and were about the same on the exhaust (even with AFR's #'s being with a pipe). Total price including the valvetrain was $2000 (because I got a killer deal on the AFR castings - $8xx).