Boost Controller,

Standard Turbos & injectors,

SE Chip,

Blitz Intake,

SE type twin Intercoolers.

Super Drager Exhaust,

?

Also approx how much boost can I run with this setup?

I've been using about 15psi with no real problems for 9 months but will the proposed intercoolers let me go higher?

I know the turbo life will be shortened but what is the max they can put out? I've heard about 17psi?

If it sounds shite its cos i'm pissed

 

It probably depends which SE chip you have. If it's the same as mine (originally developed on Hairsy's car) then I think it was estimated at 432bhp at the flywheel. Don't know what the rear wheel figure was but I would guess in the 340-370 range depending upon gearbox and a mountain of other things. Incidentally Pete told me that whilst setting up that car they found they were getting more power by bringing the boost down a bit, rather than trying to push 17psi etc. Must mean that the limiting factor is elsewhere.

So bigger intercoolers won't make much difference then?

 

Not much. I think of them more as insurance than performance.

Stock Intercoolers will heatsoak at around 370 wheel horsepower, so that will be your limiting factor. Plus a single airflow meter will be the next limiting factor.

 

But hairys car had Upgraded intercoolers did it not?

Originally posted by 300z:

 

But hairys car had Upgraded intercoolers did it not?

NO!

 

 

 

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

I think some of these 'BHP estimations' are a bit ambitious.

 

Getting over 400BHP with simple bolt on stuff like exhausts, induction kits, chips and boost upgrades just aint going to happen!

 

 

as andyp said, hairsys car was 432 at flywheel on an auto

 

so transmission loss would bring it down to about 370/380 at wheels imho

 

everyone is right, lets not get personally pedantic about numbers you can count on your fingers and toes people...

 

the harder you try to find a fight, the quicker you will find one

IF you have stock injectors i.e:-370cc

the most power you will ever get is 420bhp if the injectors are a matched set and in perfect condition,

because, even if you held the injector on full open they only put out 370cc's of fuel which equats to 420bhp(flywheel) sorry lads but this is maths, which i know fuck all(me fik)but a local bosch injector place has conversion formula on his computer and it comes up with @43.4psi(book stated fuel pressure)420BHP!!!!!!!

Neil - what about the 555 injectors I've got?

As far as the '555'injector,I aint got a clue,but i'll ask MR bosch

IF [big] IF memory sevres me well(slept since then)the fuel pump is the next restriction at around 480-500bhp (can't quite remember)then its the bore of the fuel pipes....etc....

BUT,,,i'll get him to redo it(nice man)

and i'll post the results,ok

sorry but its the best i can do!!!

it used to be fairly common (old school tuners) to increase the fuel pressure on a 300 to squeeze more fuel during the injector cycle....

 

also, what other variables does the formula take into account ?

 

there are ways to produce more power once the injectors are maxed out, just how lean do you want to go ? how much boost do you want to run ?

 

calculated 420bhp is most likely with "factory settings" on all other variables, including timing and mixture, and assuming what ambient temperature ?

 

the black box results like that are guideline only, imho

Originally posted by neil:

IF you have stock injectors i.e:-370cc

the most power you will ever get is 420bhp if the injectors are a matched set and in perfect condition,

because, even if you held the injector on full open they only put out 370cc's of fuel which equats to 420bhp(flywheel) sorry lads but this is maths, which i know fuck all(me fik)but a local bosch injector place has conversion formula on his computer and it comes up with @43.4psi(book stated fuel pressure)420BHP!!!!!!!

 

can you elaborate on that calculation ie how do you arrive at that figure, because they are good for more power than that.

 

and stock fuel pump is a very good unit, and is worth way more than 500 bhp.

can you tell us where and how you come to these concusions? ie got any hard proof?

Right,look i know there seems to be a lot of vairables???

You can run whatever boost you feel happy with,ok,the program states,MAXIMUM acheivable is 420bhp

if you retard timing you will lose bhp

if you run low octane petrol you will lose bhp

if you run large quantaties of boost it gets to a point that it will just run weak/lean you will lose bhp

IF YOU DONT HAVE THE FUEL IN THERE YOU CANNOT PRODUCE THE POWER

And as of yet i have not seen any turbo zed's boost controlled rising rate fuel pressure regulators(not saying there isn't any, just not seen one fitted)

----neil----

Errrrrrr i think people are gettin a little bit confused in BHP and other factors here.

 

Basically the Fueling problem equates to gettin a safe Air Fuel mixture to burn in the comustion chamber - How much fuel you supply is relate to the safe boost pressure you can run which equates to overall Horsepower.

 

The Fuel pump is good for about 800bhp i think - at least 600bhp so not a issue on Z's !

 

Basically stock injectors can be run up to 19psi IF you increase the Fuel pressure upto 58 psi which at the momment is the setup im running. (PS - Dont try this at home Kiddies )

 

The MAS is the 420hp limiting factor as you can't issue fuel for the Air you dont know about !

 

So below that limiting the MAS factor of 420 hp the Maximum HP you can put to the wheel is the Maximum HP your car is capable of at 19psi of boost !

 

you can't say it is exactly limited to the Injecotrs or MAS limit the HP to that as you can Lighten the Drive line, Supply denser cooler charge and Add NOS AIC, change the compression Ratio , valve jobs Etc etc. Essentially it is down to how much safe Pressure you can get inside the cylinder and how efficent your combustion and transmission process is !

 

Remmember it is AIR FUEL RATIO - that counts not just Fuel - you could fill the cylinder with Fuel if you wanted and wouldn't get and power at all !

 

 

 

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

Z ya

 

Nico91TT

 

 

God is coming ...and he dont have stock turbos . . .

I hear what you are saying!

the statment still stands true 420bhp@43.4psi fuel pressure

if the head is the restriction you will lose power(valve job out)

If you add NOS and dont supply more fuel it detonaits due to the high oxygen content of NOS(weak/lean mixture)

you need a mixture setting of very close to 14parts of air to 1 part of fuel (to reep maximum gains if you are above or below this figure you dont produce maximum power)

if you supply denser/cooler air to the engine thats good,but in order to make the power you need the fuel aswell!!

so if you dont have the fuel you cannot make the power(turbo'ed,supercharged,or normally aspirated or any other ways)