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Posts posted by allballz57
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Hp is addictive, so I would go AFR's to help solidify and future proof your build.
Mo money up front means less waisted money in the end.
Amen,Thats why I said not looking for bang for the buck,just looking or the best head for my application.
So.......Where's the best place to get a deal on some AFR 225's
....and an F1 procharger?
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Interesting thread guys. I would like to add my thoughts on the subject.
allballz57, you state you are going to be running 20PSI on a 408 correct? Have you given thought to running that much boost on the street with pump gas? I think you will run into IAT and knock issues at those levels on pump gas without topping off with race gas and/or running Methanol (even with your low comp). That being said, head choices / porting will be one of my top priorities since you will most likely be tuning to the limits of the fuel before even reaching your 20psi boost goal. I know alot of people say porting isn't a big deal on a boosted application however basic mass flow diagrams show running a ported head, you open up both your intake and exhaust flow allowing air to enter and exit more easily. Easier to get air in = less restrictive = drop in boost pressure, which means you take in the same amount of air with less heat generated and have a more dense air charge. That means more power with less given PSI (lower IAT's) and less potential for knock and also less chance of lifting a head (i.e., you are processing the same amount of air through the motor per given PSI). You may actually make more power with less boost and more streetable truck if you raise the boost IMO. If you then get the urge to increase boost with better fuel / meth, its that much more power IMO.
As for heads and boost, talk to a pro engine builder for assistance and DO ask more than one to draw your own conclusions. I like and always have liked the 243's / 799 GM castings due to their dual quench area which promotes a better burn by forcing the mixing of the air and fuel at the center of the piston during the compression stroke and typically are less prone to knock. How does the dual quench areas perform under boosted applications?...I don't know but I tend to think the same principles are involved. So if you were to choose a 243, I would leave the chamber porting alone to keep compression from being any lower and get some port work done. The downfall is the 243's are not cheap and after some port work, they may be only a smidge less than the fat decks of TEA and AFR's. Its a toss up but some ARP head studs are a must for your build.
Great reply kevin,I am actually going to run an adjustable wastegate after the intercooler to keep boost respectable on the street,but that was a whole different thread coming up.I just wanted to express that it was my goal to see 20 psi.I was told the shortblock is fully studded,so I assume head studs are already installed.
Thi is great stuff guys keep it coming!
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why not go 317's...they will handle 20+psi and already have, parish's truck did it no prob as will mine...i have seen it first hand along with the L92's hitting the 20psi mark...no reason to spend a few grand on heads when some stock ones will do fine with a little work done to them
Do you know the specs on the stock 317's,chamber size,flow?
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Cool; consider the ported AFRs - go to DPE Corvettes, spend a 1/2-hr browsing the videos, that car has almost exactly what you are assembling (4" crank & ported AFRs & D1SC).
Mr. P.
I watched the video's,they were pretty badass! I thought it looked familiar as this is the guy I got my 2.5 bar map sensor from.He is on ls1tech quite a bit.
It looks like the AFR's might be the way to go,I really don't want to lift a head with some stock castings.I am also gonna look into the trick flow 225's I have heard a lot of good things about them.
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I would have bought the cam *after* the heads, especially on a FI application. On that much boost all the GM heads are out the window (deck not strong enough) you're going to need a set of aftermarket heads. I would get a set of either CNC ported AFRs, or custom ported Dart 225s (not the Dart company ported heads, they're ho-hum). Make sure the valve job is done right, and that the valve seats have WIDE margins for heat transfer. The heads you want will require a bit more exhaust bias than seen on N/A heads. The valve events on a centrifugal motor will make or break your economy, not all 236/236 cams are the same, if the actual valve events are in the wrong place (for the stroke employed) you will be blowing raw gas out the tailpipe and/or be down on power - a N/A or nitrous optimized cam will be 50-60 hp less than one with valve open/close points intended for a centrifugal; great heads won't make best power with a cam that long anyways. Also *critical* decision is going to be intake manifold, its effect on the intake ports is even greater on the LS motor than the port itself, I would be considering the TBSS 90mm intake & TB, we don't have a very good selection of intake choices yet.
Mr. P.
The cam is aready in it,I didn't build it but I am getting it second hand with 0 miles,It was built it for a turbo car and I was told the cam would work very well with my setup,so I don't feel the need to change it.And the tbss ls2 manifold is actually coming with it ready to bolt on x-link and all.
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So,I am picking up my new shortblock this weekend and I am trying to figure out which heads to go with.So I thought since there ae plenty of you who have gone this route,maybe you could tell me the best heads for my application.
Here are the specs,Forged eagle crank,compustar forged rods,dished SRP pistons,the hole assembly has been studded,and the cam is a 236/236-.617/.617 114+4.It was built for 8.8:1 comp. but I would like to see a bit more,So I want to go with 59cc heads.Not lookng for the best bang for the buck,just looking for the best head,also I will be running my D1SC and looking to make 20 lbs of boost.
Soooo......what do you guys think?
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I'd rather hit the slipper than have her friends over
Already been down that road huh!
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This is what I rock when I feel like ripin someones head off!!
Hatebreed-I will be heard
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bring it! i am sure brent dont mind? brent in 3...2....1......
Hell no I don't mind,as log as it's not a Mazda and you don't like to blow up other people's motors,your in!!
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You are on the bus when you suddenly realize ... you need to fart.
The music is really loud, so you time your farts with the beat. After a couple of songs, you start to feel better as you approach your stop.
As you are leaving the bus, people are really staring you up and down. That's when you realize, you have been listening to your ipod.
:thumbs:
...........and the beat was the humpty dance!!!!
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isnt the silver slipper the strip club? shoot if thats the case im not sure how i could say no to that deal.
Yes the slipper is a strip club! and chris the lamp liter has new(read good) talent
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I have a set of stock chromes with brand new hankook ventus st tires on them,but the winters up here where not kind and if you get right up on them they are not perfect.I was going to use them in the winter but now I have another DD so I haven't taken my 22's off. $850 and they are yours.
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id would love to make it up. I need some sound deadening on the back of the cab. I don't think the roof would be an issue but how much would I be looking at? id really like to get this done.
You would be surprised how noisy the roof is,you can tell a night and day difference with it done.And while its down...cover it with suede
I'm sure chris will chime in...........3.........2..........1..............
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F-ing hilarious!!Nice find!
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NIce tat,I also have a phoenix on my back,not as big as yours though,and I agree with you...the shading is the worst,especially over the spine.
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I want a can! I thought that was just a Bob & Tom commercial, not a real product.
http://www.dickensenergycider.com/
Ask and you shall receive!!!
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sounds like a busy weekend, you better get some more of that Dicken's Cider energy drink!
I want some! or at least one can.
I cant wait, i talked to PDB last night, he should have his new toy by then. he is trying. I also called Matt, but he is stripping his SS. so who wants some brakes?
I only have 1 can left,and I think they discontinued it,but if you want it,it's your's!
Too many times I've said "So do any of you girls want some of my Dicken's Cider ?" And then they took me up on it!!!........the drink of course!
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bump cause work blocks my pics and i wanna remember to look later! and also, what does this 8 rib set up run?
You really don't like the look of that fan pulley do you?!
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Shift kit installs. Is that on the list?
Pm zippy or call him,he will be here all weekend.If he want's to do it we will make it so!
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AAAAhhhhhhh the memories!!!!!
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Unreal price!!!! This should be gone in a hurry! I'll bet there's more than the asking price in mod's on that truck.
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Looks awesome,but I like your setup better,with the cog drive and clutched blower pulley
I take it there is a significant price difference than with your setup?Otherwise I'd go the cog route!
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lolol with the new B-rad tune !!!!
The B-rad Boomtune is reserved especially for you iowa guys,did he blow up his mazda yet?........ooooh that's right he doesn't have software for rice!!!...good decision on his part!!!KABOOOOOOOOOOOOOM...........uuuuuummmmm,that wasn't my fault
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Definately worth it,night and day difference with it in there.
Going 408 Soon,what Are The Best Heads For It?
in Engine Tech And Modification
Posted
Zippy,I posted that before we talked last night,and since your tuning it,if baby steps is the way to go without catostrophic failure,I'm all in,but I do think I eventually want to run the TFX 235's since I called trick flow and they said they will work on a 408 with a 4.030 min bore.So I am thinking that I might try patriots 243 castings,they come ported in a 59cc chamber,what do you think?