I have a early UK blob STI on around 60k. Mainly a road car, but would like to do more track stuff. I've done just over 4000 miles in 2.5 years.
I’ve got, ready to go on:

ID1000’s (from America, and been stuck in UK customs for the last 4 days, I am scared, should’ve gone to Lateral)
Hybrid FMIC (used, but you wouldn’t know. Going to get a coat of etch primer, matt black or Kawasaki green & lacquer today)
Harvey Smith 3 bolt up-pipe (beautifully wrapped by Harvey, the legend)
RCM Induction kit
MDX321T (due this week)
Millers 10w 50
Battery relocation kit
Apexi AVCR
Knock link (lights in the clock binnacle)
Heat wrap – Viper wrap
Turbosmart plumb back BOV
Catch can
NGPFR7b’s
Oil filter

Already fitted:
RaceDynamix Remap
Heatwrapped GT Spec 3 Bolt Headers
Japspeed decat downpipe wrapped
HKS 3' all the way exhaust
Prodrive 3 port boost solenoid
Walbro fuel pump
NGKPFR7b's
Denso 650 cc Injectors
VF48 under a PTP Turbo Blanket

I will probably get a Group N spec baffled sump from Alyn @ AS Performance

My concerns are:

1)Fuelling – The 255lph Walbro fuel pump would be close to its limits, and I don’t want this to hold back the rest of the set up. I am thinking I should get a nice swirl pot and 2nd pump in the boot. Which pump & which pot? Would I need a FPR?

2) MAF – I have this :- http://www.rogerclarkmotorsport.co.u...productID=1150
& it’s not cheap (unlike me) but is also likely to be at its limit as Shaun is finding in his project thread.

Any suggestions/links to solve the above 2 concerns on a budget would be gratefully received Syvecs would be lovely, but I haven't got the money

 

Similar spec but non billet MD321T on newage with MAF making 443hp. I use a TSL high flow pump & 750cc Deatchwerks, runninf spot on. The only thing i would change is the mapper

A slighly bigger MAF housing would help. My MAF is almost or is maxed out.

 

and whats wrong with duncan,, hes forgot more than you will ever know

 

I should have mentioned I want to use Meth, 20% or so. I know using Meth requires bigger injectors, does this also not require more pumpage?

That's decided then, I need to get a different induction kit with bigger MAF, but which one

Duncan & Simon have both gone out of their way for me in the past. I haven't got a bad word to say about either of them

Questions remaining, which pump to feed the swirl pot? Do I need a FPR? What induction for big MAF?

 

I dont reckon you would need bigger injectors for using meth. Swirl pot, again i dont reckon you would need it at that level, however a bosch fuel pump would be fine. FPR would be good goings as you have 1000cc injectors.

MAF wise you can either go mafless or just buy a bigger maf housing, for example a 3.5".

Any decent sized filter would do.

Have a look at this thread, might be helpful https://www.scoobynet.com/members-ga...g-set-ups.html

 

For track use, a swirl pot would be a good idea. FPR is not needed, will depend on your injectors and required fuel / flow goal (read bhp).

Get a larger MAF housing.... RCM still do them afaik. This will slow the air down. Needs mapping for though.

The last thing you want to do is max the MAF out. It can result in the map running lean and not something you want at or around peak airflow! Get the biggest K&N that will allow, in the space you have.

I'm very near to the current limit on my set-up and it needs sorting asap to progress any further.

 

Surprised no one's commented on your aim for 450 and running standard, UK spec. middle aged internals!

JohnD

 

The OP wouldn't be the first and I doubt he will be the last!

 

yes healthy engine is fine to 450.. have pushed to 503 on my own car previously

Simon

 

Thanks for your help Shaun, to clarify my goals, the turbo is 450bhp rated, I want head room and so a fuel system capable of supplying 500bhp sounds reasonable I don't want to get everything fitted and start mapping only to be told, that FPR is needed and to have to hold it back until one is fitted.

Just measured my RCM induction, and it's 76mm That is bigger than standard isn't it?
The filter is 170mm high & 160mm wide. I will get the bigger 210mm one ordered

Look forward to your next update asap please, I want to see your air feed and what you do to keep heat away from the filter
What is your current fuelling set up?

 

You will not need a FPR for a 450bhp target on 1000cc injectors. 800's can flow (without a FPR) for just under 500bhp on a Walbro. Been there and done that on a previous car. All depends on how much headroom you want and you really need to speak to your mapper to see what they would prefer as well.

76mm is 3"... which iirc is bigger than OE.

Don't worry too much about ducting. All I have done is used a WRX foglamp cover and opened the inner wing aperture up. It's good enough to generally see only 3degs above ambient during road use. Of course fitting some duct pipe from the foglamp cover to the engine bay will help further.... this is all I will be doing to finish the job off.

I'm currently on 800cc injectors and a Walbro. Plenty of headroom left at the moment for what I want. However the car will probably get a swirl pot and Bosch pump in the engine bay, but purely to stop surge for when I take it on track next year.

 

Abbas - a FPR wont be needed for the ID1000 injectors, they flow great and idle great even at standard pressure. Will be plenty for your needs. Ideally you would fit them if you went for a parallel fuel rail mod but that isnt really needed for 450, but would be benficial for 500 IMHO. I managed 540bhp on std fuel rails (and on std ecu) but need to map richer than ideal to allow for the weaker mix in some cylinders.

The maf will be pretty much maxed at that power unless you go for a large maf housing such as the RCM or KSTech set ups, but I would say you are better off at that stage going for a Syvecs ecu as it will not only give a better overall feel to the car but it will allow for many different maps for daily running aswell as 1/4 miles etc.

HTH - speak soon

 

Read the posts Duncan, he already has a 75mm maf housing which is good for 500+bhp.

As for mapping richer to allow for cylinder to cylinder variation, I agree but whats your definition of richer?

Run them too lean and it could end up like this guy who has a similar spec car to the OP

http://bbs.22b.com/cgi-bin/ultimateb...1;t=000866;p=1

 

Hi ducan you still havn`t replied to my pm regards the extra cost in getting my car remapped