It's a 2000 5.4. What would optimum shift points be then on the track? As long as I can beat some of the ghey german teens with the turboed golf I will be happy! The ole 4.6 pi swap was able to lay a small (but still won) smackdown on a completly gutted Porsche 944....



As far as the Pils goes, find out what customs regs are and I will see what I can do for you....

 

what the sim is leaving out is port velocity.

really most stageIII pi heads flow 215ish. even though advertising says otherwise. and their velocity is too high for 5.4 l. to prove it simply note the low rpm band of even big cammed /intaked 5.4 2v.

the tfs parts have their velocity more in line with higher flow for REAL high rpm potential. figure a 5.4 2v making max hp at 6900 all motor is what i expect.



all of you guys with great setups will be killers with the new heads. you will all need forgings to handle the revs those heads will provide.


think of it as a 5.4 4v unported. RED YOU WILL MAKE MORE POWER THAN A BOSS 290 AUSSIE WITH YOUR SETUP AND THOSE HEADS.

 

nate, far as i know we can only ship wine to the states. R3D when i PCS from this bitch in june 2009 i will try to pack some cases of shitburger (bitburger) for ya and hide it in my house hold goods. i dont like Pils but i do enjoy the heffe's.

nate, trying to get spun up on the 5.4 lingo over here.

 

ok... did some more work on the simulator. Boy I tell you what, with a 3.7" bore and some MUCH bigger valves the tf heads could knock down damn near 400rwhp. BUT, the valve size (and the related small bore size, even with a 3.7" bore) seems to be a limitation that I just can't find a way around in the simulator. With a 3.57" bore and 1.84/1.45" valves there's an insurmountable wall right around 460bhp even with those heads and nasty cams.

 

my gut tells me that you're right. that and the fact that the sim definitely does not do justice to the effects of odd head designs like TW's. I may save the cash up and get a set when they're out. It'd be really nice to have that magic 400rwhp mark with a NA 2v wearing streetable cams.

 

Alright.. I feel like an idiot for forgetting this. What is the stock bore size?

 

3.55

 

Ah. So my .030 over bore wouldn't be past the 3.7 mark you mentioned.

 

nope... it'd usually end up 3.581 or so. You have to have the cylinders basically machined out and have the block fitted with 3.7" bore sleeves. It's expensive as hell. Check out the MMR 351R block. It's a 5.4 block with a 3.7" sleeve job done.

 

Thanks for the info. BTW, Hitechs site says that you don't need upgraded springs when using their stage II cams, but they do suggest them for engine speeds above 6400rpm. What do you guys think? I'd rather not spend extra money if I don't have to, plus I could avoid the process of having to remove/re-install all of the springs.

 

just get the new springs. It's not worth breaking one and destroying your engine. They're old, they're worn. Get new.

 

Ok then. Out of the 4 listed at the bottom of the "Modular 2v" page, which one would you go with for a set of their StgII cams?
http://www.hitechmotorsport.com/inde...pper&Itemid=85

 

The first of the Manley Nextek's listed. The ones good for .580 lift will take whatever you're likely to dish out.

 

I would go with the very bottom ones since they have a bit more seat pressure....depends if your going N/A or forced induction¿ Maybe r3dn3ck will chime back in...

 

well, drove sleepingGT's car around today for about 50 miles or so. seems alot better with the long tubes. we'll see this week if i can get it to the dyno.......

 

Unless I manage to win the Lotto, I will be staying NA.

 

Speaking of Hitech, has anyone bought ported heads through them? They claim that an extra 80hp is possible with their Stg III heads, but that seems way too high. I only ask because their Stg III heads are $700 less than the new Trick Flow heads, and some people on here seem to doubt whether or not those heads are worth it. Here's a link to Hitechs Stg III 2v heads (third one down.)
http://www.hitechmotorsport.com/inde...pper&Itemid=87
Just making sure that I examine all options before committing to a certain setup.

 

havent posted in a while, but i've made some amazing progress... i'm just under $25k spent in the past 10 months, and i tried to turn it over for the first time last friday but the starter was too weak and it would not make it happen. We try again monday, but here are some pics.

 

If you can I would say wait till the trickflow heads come out. So far on the test vehicle they are amazing and on paper they look like the gods of all 2V heads.They should be coming out very shortly and we'll know fairly quickly what they can do.

 

very nice pics....

 

Ibanez... SICK! that looks really fantastic. Great work. The anodized cam caps are smokin looking. Too bad they'll be covered .

Audi: I'd be looking at TEA or Fox Lake if you don't want to spend the extra 6-700 for the extra power. **** maybe I'll sell you my Fox Lake stage 2's when you're ready and I'll just buy myself a set of the TF heads then.

I for one will be definitely saving up for the TF heads. I've done the math on it and it's just more cost effective than doing the 3v swap and I've completely written off the possibility of a 4v upgrade. The TF heads with all the porting that can be done will probably be the best fit for me.

BTW... headers are done. I have a pic of the driver side header off the car just before it was finish welded which I'll be posting momentarily. The passenger side was being finish welded when I was snapping pics. Should have the car back (new estimate from the shop) some time in early january.

We're going to tune the collector length on the dyno for maximum returns then they'll go to production.

 

PICS OF HEADERS

 

One more reason I'm going to stay broke...

 

Thanks r3d. It all depends on whether or not I have the money available. Plus I still need to sell my damn car, and that isn't going so well. BTW.. When (or if) I pick up my P71, would pictures of the undercarriage/engine bay be able to tell you if your LT's will fit? I realize that may be impossible, but I figured it would be worth a try. If it doesn't look like they will fit, I will just go with your shorties and call it a day.

 

And BTW, those headers look F-in sweet Good job r3d.

 

no way to tell if they'll fit but to stab a set up that way. I'm betting that there will be minor interference but that they should be able to be made to fit with a minimum of fuss. They're being made to hug the block pretty close which makes it easier to fit them to various other models.

EVERYONE GO TO THE LOUNGE AND DONATE 20 BUCKS TO THE CAUSE in the top sticky. If you donate 100 bucks I'll make you a free rear water crossover line for your HPS intake that I know you've all called up and ordered. heheh

 

Hey r3d.. Can you send me a message with your asking price for the heads? (assuming you do end up buying the new ones from TF.)

 

think of it in terms of tunnel rams.

if you have two tunnel rams with equal length and final opening diameter, the two should flow very similar numbers. but taper angle really determines rpm band they operate in. there is an optimal angle for each rpm you want maximum torque to occur.

with PI heads they open them up as much as will flow, but actual flow coeficients are not real good for larger motors. you can do the same thinking about B 4v heads. open them up to flow 350cfm and the port size and flow coeficient is useless for 4.6. it peaks at 10,000 rpms. its the opposite with 2v.


now take a port design that has a casting with a specific rpm point in mind. you design the port with a set CC size and taper/length to valve. you are still limited by the 1.84 valve, but velocity is much lower and its usability expands to larger motors. i remember BBK, whichBTW is designing a 2v intake just like the mach1, is looking for 5l or larger for its testing. these heads are going to be superb for 5.4. especially in CNC form. if i can remember right some dodge boys in an nhra class that requires stock valve size can get 280ish cfm from 1.84. so in effect i believe from TFS's history you can expect full race versions of porting to exceed the 257cfm for the cnc TFS head.


this is speculation based on their history.

400rwhp should be farely easy. your sim also doesnt take burn rate/efficiency of the chambers. a 36psi/degree burn rate should be near what they burn as my guess. only way to know is to monitor exhaust temps. the cooler they are, the more power a given combustion chamber makes.

my $.02


this may all look foolish after they release. but think boss 290 ish hp. 385 crank for a stock idleing/running motor with a REAL good intake. 6200 rpm peak.

 

stop it... you're giving me a raging boner.

 

Ewww :P