[BOSSGT]

Dont get me wrong but how are you supposed to get more power if you cant increase the RPM limiter? Everyone knows that in the normally aspirated world to get HP you must increase RPM. Now on a dyno a 5.4 290 boss is still producing power at its 6000 RPM limiter, the power curve has not even started to platue yet thus telling you that the cams fitted to a 290 boss have a lot more power left in them after the 6000 limiter.
on the engine dyno the 290 power plant was still producing power up to 6500 RPM at a constant rate and could do this all day the problem is that once the limit was taken to 6,700 all hell broke loose. a set a sticks may increase a little power between lets say 4500-6000 but is it worth the loss from the original 3000-6000 power band and will your shift points drop back into the meat of the power band having a 6000 rpm limiter?
my opinion is put the money towards a motec and piggy back it into the system to give you a 6250-6500 limiter. this is what im doing next on my GT-P and i will have a longer power band and more torque. A set of sticks are from what ive been told $4000- so another $1000 for a motec is within range.

Elmer Fudd

 

[XRFPV8]

my opinion is put the money towards a motec and piggy back it into the system to give you a 6250-6500 limiter. this is what im doing next on my GT-P and i will have a longer power band and more torque. A set of sticks are from what ive been told $4000- so another $1000 for a motec is within range.

Elmer Fudd

Elmer can you tell us a little more about the motec please....

 

[Xtreme F6]

Fordhead
Boss 330

The heads flow Approx 265/195 cfm stock. My ported versions are in the 320/230 range at .500 lift.

.. Al

So they flow 544HP std????Im guessing your using 28 inchs?

Is this the heads we are using in the aussie cars?

Yours flow 657hp....By .500..OMFG thats a pretty aws set of heads man.

P.S Boss check your Pms

 

[BOSSGT]

As you know Motec are probably one of if not the worlds best engine management systems. Most people if not all usually only buy a Motec for serious street/race cars(ie; v8 supercars) but this usually renders climate controls and other items unusable that run of the standard computer. i have dicussed the idea of piggy backing a Motec onto a factory system with the engineering guys who set up our race car and many others including trevor haine's GT and was told it is very possible.
if you are going to put a set of cams in you will have to fit a piggy back managment system of some sort any how. A set of cams are going to be around $4,000 and a unichip $1,200 then someone to fit the cams if you not a mechanic so the job will end up being around the $6,000 mark and you will probably have a couple of extra kws and a shorter power band because of the limiter.
of you have the 260 then cams is really the only way to go but in the 290 my personal opinion is the secret to unlocking untaped power is go Motec

Elmer Fudd

 

[Rodderz]

...or wait till someone cracks the ecu script. I agree BOSSGT

 

[Rodderz]

...or wait till someone cracks the ecu script. I agree BOSSGT there is a lot of power to be unloaded, the motors do seem to be lacking in the way of soft tuning from the factory, but i spose it leaves ford with room to move for the future. The way you explained the Boss290 has peak power @6000rpm and no plateu as yet shows that more power can be gained through some sort of reprogramming.

In your experiences thus far with the limitations of piggyback chips, how much gain would you expect out of an LS1EDIT-style program for the Boss engines?

 

[BA330ci]

& finally we have a winner, the rev limiter is the key to the whole thing & until its cracked dont waste your money on a set of bump sticks

 

[Fordhead]

& finally we have a winner, the rev limiter is the key to the whole thing & until its cracked dont waste your money on a set of bump sticks

The rev limiter won't help unless you change your rods and oil pump along with your cams , otherwise major sadness will occur down below.

 

[rod]

The rev limiter won't help unless you change your rods and oil pump along with your cams , otherwise major sadness will occur down below.

i totaly agree Fordhead
but i think most people ( count me out :angel: ) on here are looking for power from bolt-on's & do not want to touch the internals as yet

a lot of people still care about there warranty as for me i say " what warranty" :zzz:

regards
rod

 

[slow CV8]

The rev limiter won't help unless you change your rods and oil pump along with your cams , otherwise major sadness will occur down below.

All manufacturers build in a tollerance when they design and build components, usually 10% is well with in this tollerance. Rasing the rev limiter by 10% would doubtfully have a negative effect nor risk engine life, its not like you are there for any meaningfull amount of time, unlike say a Nascar or the like. Another 600 rpm would really make a big differance on a 290 and would be most desireable if cams is on your shopping list for either the 260 or 290 Boss.

Did FPV test to distruction? Are the Conrods allready streesed and eating in to our tollerance?

The powerderd metal conrod in the LS1 is the strongest conrod Chevrolet have ever made in any engine to exit there plant... ever, I know of zero broken LS1 conrods caused out of excessive revs or boost. I know its not the same engine and the design of the 5.4 adds to the conrods stress but the general manufacter of the PM conrods is preety bloody good, surely it cant be that bad. 3 years ago, everyone was saying the LS1 would self distruct if you looked at it funny, now you've got std bottom end supercharged cars making nearly 800hp!! I wonder what we will be doing with these engines in only six months!?!

And whats the issue with the oil pump? cavitation at higher revs??

 

[BOSSGT]

From What contacts i have the distruction tollerance is 6,700 rpm and There is a problem with oil supply at that rpm. I was told that a good windage tray was a possible solve but it has yet to be tried and tested.And it is true what you say slow CV8 they always have that 10% tollerance so a 6,500 limiter i would say is in safe limits but i guess that ill find out.

Elmer Fudd

 

[russellw]

I'd still be concerned about piston speeds - they are already high at 5800 rpm and I'd personally be stopping around the 6250 mark which should still be a marked improvement.

I've also received the same info about the oil supply issues above 6700 but I'm bringing over some US bits that might help with that - will keep ya posted.

Cheers
Russ

 

[Fordhead]

i totaly agree Fordhead
but i think most people ( count me out :angel: ) on here are looking for power from bolt-on's & do not want to touch the internals as yet

a lot of people still care about there warranty as for me i say " what warranty" :zzz:

regards
rod

As you know Rod , I thought about the warranty , but with our present mods , Ford already have a reason to void it anyway , so I don't know why I bother worrying . Whenever the ECU is editable , thats when i'll make the decision as to wether the motor comes out .
New rods , pistons , cams , oil pump and port job , along with remapping capabilities , and these things should crank some serious rwhp .

 

[XRQTOR]

russelw what are you thinking in the way of the oil issues, i cant see why parts cant be sourced from the states, im lookin at buying a 01 cobra from there with a forged short block twin turbo set up and big fuel system. They have had these modular engines for a few years now and the need for aftermarket parts is huge, http://www.need-4-speed.com/lightning.htm rod and piston combo only $2263au 250 or so for shipping not bad. The after market parts dont end there either. Best bet i rekon is forged shortblock nice fuel setup motec and 200shot. Should be good for 10's

 

[Boss 330]

The issue is not oil supply, The problem is the gears in the oil pump are powder metal forgings. They destructivly fail at speeds over 6700 rpm. Billet gears are available. The stock rods are a big gamble over 6200. They break about 1'' below the pin. Also the big end distorts causing spun bearings. I use a external belt driven pump for high rpm engines.

 

[Rodderz]

I wonder if the rods for the aussie 5.4's are made locally and if so i wonder if they seem stronger? If not a top rpm increase in any code crack will have to be carefully implemented

Boss 330 i suspect that you are speaking from experience...a few $$ went busting away striving for those extra kw's?

 

[Xtreme F6]

From what ive heard the rods and oil pump are really all these engines have as there so called weak link. Replace those and thrash away. Possibley valve springs aswell

 

[XRQTOR]

boss 330 owns a mustang equiped with a 5.4L ^500rwhp n/a that runs 10's.

 

[XRQTOR]

can anyone tell me what computer run these new mod motors, mob in the states make a program that can controll all of the factory settings they are called sct im trying for more info now on them. In one post i read from them they said they work with aussie calibrations too. But if we can get enough support they will probally make a program specifically for the new falc's if demaand if high enough.

 

[Rodderz]

Is that programmer similar to the Hypertech Power Programmer, as seen here:

http://www.ford-trucks.racenet.net/electrical.php#HY

A hand-held device that identifies the characteristics of the engine and VIN numbers and allows you to change the factory settings. Maybe similar to what battens was asking about for peoples ecu numbers