Fuelling set up & MAF for 450bhp
#1
Fuelling set up & MAF for 450bhp
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
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
#2
Scooby Regular
iTrader: (73)
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.
A slighly bigger MAF housing would help. My MAF is almost or is maxed out.
Last edited by KAS35RSTI; 09 October 2011 at 03:25 PM.
#4
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?
#5
Scooby Regular
iTrader: (73)
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?
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?
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
Last edited by KAS35RSTI; 09 October 2011 at 04:03 PM.
#6
Scooby Regular
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.
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.
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#8
Scooby Regular
#10
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.
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.
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?
#11
Scooby Regular
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.
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.
#12
Former Sponsor
iTrader: (3)
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
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
#13
Subaru Tuning Specialist
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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
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
Last edited by Andy.F; 14 October 2011 at 09:58 AM.
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