UpGrade Stages?

[grinder]

just bring this post back from the depths !

i have looked at the car and it has no MAIN cat - just the little one

can this cause boost spike at all

and will removing the cat have any ill effects on the car ?

and reading in lots of places they say that you can do a fuel pump rewire or fit a bigger pump ( off a 3rd gen is possible so i am lead to believe > )

what does the rewire actually do ?

and why put a 3rd gen pump in ?? - again what does this do ?

if you can do the 3rd gen swap - is it literatly a swap or a bigger job !

thanks

Stu

( chris if you read this - sorry i didnt get to speak to you at the last meet - there was quite a few people huddled round those little tables ! )

[Grizzly]

To put it in a Nut shell, The FD pump is good for 300 bhp and is a straite swap.

The re wire you are talking about, On some older cars they may not be seeing the full 12v at the Pump so in turn you wont be geting the proper out put of the pump, so what they do is Relay the Pump so as soon as you turn the key it gets full 12v. There is a big down sign to this, first the pump is flat out all the time and so it wont last as long then there is alot more fuel at lower revs which in turn causes a richer low revs.

I have a stock GTR pump in my Vert which is the next step up from the FD pump which works fine for me.

Chris

Stu, No probs.

[88GT-R]

Stu,
Just an addition to the previous reply, If you are going to change the fuel pump, which is advisable, it would be a better and cheaper option to go for the Walboro 255lph pump. Straight swap for the std pump, and has a much higher flow and pressure rate than the FD pump. Aswell as being a sight cheaper than the Fd unit.
You will get marginal boost creep with the main cat removed, but keeping the front cat in the downpipe does nothing for your emmisions, and it keeps all the heat right next to the turbo and the engine, which is no good. As your main cat is off, is your airpump still installed?
As a rule of thumb, with an open exhaust system, ie, turbo back, with the air box still installed, you are only likely to hit boost cut on cold days. Go for an open and sheilded air filter, you will need a fuel cut defender, as well as the fuel pump mods.
If you go onto //www.teamfc3s.org and seach for \'fuel pump rewire/mod you should find a link to a good write up. Failing that, try //www.1300cc.com , where you will find a few interesting write ups, including the pump rewire.

I hope that this helps, good luck.

John
88 GT-R

[grinder]

core blimey thats a lot of into to take in !

right then lets see ...

1 - so i could run a FD pump by itself no probs - thats a start
2 - Walboro 255lph pump - its just finding one at the end of the
day !
3 - main cat is gone , front cat is still on and so is the air pump
4 - still running a standard air box ( although looking at drilling it to make it breate easier ! )
5 - The FCD - i have heard so many stories about this - i dont know who to belive !!

thanks again chaps !

Stu

[88GT-R]

Hi Stu,
FCD first:) This works by clamping the voltage before it gets to the ecu from the boost sensor. IE, the ecu sees boost cut at  say 4.3 volts, sent by the boost sensor. The fcd would be set to clamp the voltage at 4.1 volts, thus eliminating the cut. The fcd would be placed between the boost sensor and the ecu. You would obviously need a boost controller to keep the pressure at a reasonable level.
Cat and air pump... a down pipe which would get rid of that evil cat can be had for around 60 quid. You will experiance quicker spooling and a longer \'pull\' from the turbo. The turbo and the engine will also run a bit cooler. As there is no main cat, your air pump and control unit are useless and a waste of space. Not hard to remove...but do you want to? Find how to... in the links previous.
Walboro pump... They are quite cheap from the states. I got mine through Racing Beat, But they are also available in the uk.

For all the above bits, speak to Pip Gardner on 01606 48866 at WGT.
I hope this helps  

John
88 GT-R

[grinder]

i will have to have a word with my mate chris about taking the air pump off !! ( :wave hiya chris )

can you run the FCD by its self - or does it need the boost controller ??

60 for a pipe - ooohhh thats not too bad - i will have to look into that one

but i heard that if you take them off you can cause damage as you dont get enough back pressure ( or summat like that )

these rx7\'s are wierd - different story being told be every one !

i think thats my main prob - trying to hard to get the right answer rather than just doing it and worrying later !!

[Grizzly]

If you dont mind me asking what are you looking to achive?

A FCD is in my Opinon a wast of time without somthing add more fuel? ie. Injectors and Rise rate fuel reg. If you are looking for reliability dont cut corners.

The FD pump is not expencive? Try Tim at RXMotors they are readly available. Unfortunatly i dont rate Walbow pumps they are good to mid to late 300\'s and thats about it.

If you want a tip when you get rid off the Air pump make sure you fit a twin top Pulley, i had a near death experiance a few years ago when the belt started sliping and burnt out in the middle of nowhere which caused it to overheat dramaticly and very quickly so i like to play it safe nowadays.

Chris

[88GT-R]

Chris,
You are totally correctin saying that you need the fueling sorted first, but that doe not make the fcd a bad thing. We all know that if you don\'t set a limit and a goal when playing with these engines, you will very easily get carried away.
 My advice would be, get the car running well, before changing parts.
Make it safe...ie, provide enough fuel through a larger pump, better grounding around the injectors, less heat in the engine bay( front cat).
If you want to start making more power, then we start looking at standalones and and turbos.
But you will need an fcd if you get the downpipe and upgrade the air flow. In turn you will need a larger pump and regulator to keep things even.
Remember killer points on these cars are the fuel system, and heat and dirt....not to say the very slippery slope once you get started:rollin

Good luck

John
88 GT-R

[Grizzly]

I see the FCD as removing the last line of defence against Det and other nasty things when the car has not got the means to be set up correctly with the Extra Boost.

I have run a 2.5" exhaust (-cats) with a Blitz induction kit on a tired T2 without any problems but as soon as i up\'d the boost to 10psi i had an Apex seal fail and blew the Turbo, so i am a big believer in doing things right in the first place. I relies now I didn\'t have full 12v on wot causing it to run lean. POP  

Anyway 88 GT-R from you sig i see we have a simalar set up, Do you use Pre mix with your Microtec?

Chris

[88GT-R]

Chris,
As i said before, i agree with you on what you are saying, and if the engine is healthy and tuned right, the fcd can be a tool rather than a cause of detonation. Unless our man goes standalone, he will have to utilise a fcd if he opens up the breathing.

I am using premix...normaly Shell ultra, which is a synthetic 2 stroke oil. Do you use it? What ratio are you using? I am running at 150:1. What differences in set up do you have compared to mine? Am having a to4e/to4b hybrid made up, and will see how that runs.
Will you be going to rotorstock in May? I will be coming over from Germany for the weekend.

Anyway, i think i am stealing Stu\'s thread. Keep well, i hope to have more conversations with you.

John
88 GT-R

[grinder]

hey guys i dont mind you chatting away - so feel free - at the end of the day i would rather listen to two people with experience of what they have done and what they have achieved !!

basically chris what i would be looking to achieve is a milder faster car !

hows that for an open ended statement !!

chris how did you up your boost to 10psi ??

so then it looks like a nice course of action ( for the engines sake ) is :-

1 - remove the front cat
2 - look at a bigger fuel pump ( probably a third gen )

if i look at doing this before anything else - i should be safe !

rather than going thru the "what if\'s" i will look at starting simple

the engine has 105K on it ( which means the turbo has that on it to ! ) - but it got a rebuild about 30K ago

at this exact moment intime i cant find anything wrong with the engine - it pulls fine and revs freely - and starts first touch

im more concerned about the life of the engine !! - i cant afford a rebuild and if it goes bang then the car goes to the big garage in the sky !

chris you said I relies now I didn\'t have full 12v on wot causing it to run lean. POP - now not sure if its your spelling or what , but what is WOT ??

thanks guys for all your help so far !

Stu

[scooby_si]

WOT usually means wide open throttle init?
SI

[grinder]

i have no idea !!

i expected an apperance by you si a long time ago though !

[Grizzly]

Yep, WOT usaly means Full throttle.

88 GT-R, I have riged up my OMP to run flat out all the time, ok it smokes sligtly on idle but its not as much as a pain in the rear as Pre mixing.

I am prescently making an Exhaust Manifold for my T2 to run a 60-1 T4 Turbo.

My T2 Vert is a work in progress, i am trying to make it as safe as possable whilst getting as much power. My Every day car is very much on a Buget as i have a Custom Triple Coupe in the build prosses as well. So moneys Tight.

STU, if you want my opinion. Assuming your O2 sencer and fuel Pump is good (Pump seeing full 12v on WOT) I would keep it tame fit a 2.5" exhaust and a Induction kit  then find somone that has a Wide band 02 that can tell you how close you are to your limit then i supose as long as its not starting to drop into the lean you can fit a FCD and play with the boost until you are at a safe place.

I have been told though without a Stand alone you may struggle getting anything over 230bhp without risks, just dont get greedy on a stock set up.

Chris

[grinder]

thanks chris !

I think this thread is gonna get VERY long winded !

its probably best for you to nosey at the car - as im not sure what exhaust it has currently - its a powerflow one - but not sure of the size !

are you going to the next meet ?? - if so i will bring a torch !! ha ha ha ha !

if 230 bhp is achievable with just exhaust and induction kit then that would keep me more than happy for a while !

although you say induction kit - is that the open filter thingy - or is it better to put in a K&N filter and drill the air box ?