more ponnies please
24 March 2010, 01:25 PM
#1
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more ponnies please
i need my scooby to be faster
its a v1 sti with apexi power fc , avcr, fmic, feul pump, plugs, 440cc inj blah blah
peak boost is set at 1.35 bar just now, and after on the road mapping guesstimates were roughly 310 bhp
my maf and inj were on the limits at that, so ive sourced 660cc injectors
i was going to go simtek, mafless, but is there any other way round the maf issue, different maf, blow through maf?
i really like my power fc hand controller and avcr readouts, and would rather not loose them, seen as with the simtek you get nothing i beleive
plus obviously the added expense
i am fully aware my engine/box may not last very long - but once the engine goes i want to upgrade it anyway, but still have all my performance bits inplace, ready to go back on.
its a v1 sti with apexi power fc , avcr, fmic, feul pump, plugs, 440cc inj blah blah
peak boost is set at 1.35 bar just now, and after on the road mapping guesstimates were roughly 310 bhp
my maf and inj were on the limits at that, so ive sourced 660cc injectors
i was going to go simtek, mafless, but is there any other way round the maf issue, different maf, blow through maf?
i really like my power fc hand controller and avcr readouts, and would rather not loose them, seen as with the simtek you get nothing i beleive
plus obviously the added expense
i am fully aware my engine/box may not last very long - but once the engine goes i want to upgrade it anyway, but still have all my performance bits inplace, ready to go back on.
24 March 2010, 03:17 PM
#7
Get a Q45 maf & stick with the power FC. I really miss my Power FC & AVCR set up. The interior looks more detailed & you can monitor everything. However it all depends on how fast you want to go...
Btw how do you know your injectors are on the limits? What does the injector duty read on your commander? Im assuming you have a commander.
Btw how do you know your injectors are on the limits? What does the injector duty read on your commander? Im assuming you have a commander.
Last edited by KAS35RSTI; 24 March 2010 at 03:19 PM.
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24 March 2010, 04:47 PM
#8
The turbo isn't the limiting factor yet as it will boost up to 1.5-1.6 at a maximum. Mine does 
If you do get a bigger turbo then yes, gearbox will go first, followed by engine at some point if its running more than 350 bhp.
Cant see the maf being limited at 310 bhp? Never heard of that before. I believe you can run more power than that with 440s aswell, but you need a fuel pressure regulator to achieve it.
If you do get a bigger turbo then yes, gearbox will go first, followed by engine at some point if its running more than 350 bhp.
Cant see the maf being limited at 310 bhp? Never heard of that before. I believe you can run more power than that with 440s aswell, but you need a fuel pressure regulator to achieve it.
24 March 2010, 04:53 PM
#9
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MAF runs out of scale / volts when the airflow is beyond a certain flow.
Need as said above a bigger MAF which can be scaled in the Apexi PFC to suit.
I think it is a Nissan MAF ( off a Z car .. z32 ?? )??? likely that Q45 s above. I got one direct from Japan on last car for about £130 new, not sure on carriage / tax.
Using the calc injector flow per min x no. injectors x duty / 5.5 ( cc fuel per bhp ) we get
444x4x100/5.5 =
440 injectors would be good for about 320 bhp at 100% duty, 260 at 80%.
550's about 320 bhp at 80% duty, 400 at 100%.
Need as said above a bigger MAF which can be scaled in the Apexi PFC to suit.
I think it is a Nissan MAF ( off a Z car .. z32 ?? )??? likely that Q45 s above. I got one direct from Japan on last car for about £130 new, not sure on carriage / tax.
Using the calc injector flow per min x no. injectors x duty / 5.5 ( cc fuel per bhp ) we get
444x4x100/5.5 =
440 injectors would be good for about 320 bhp at 100% duty, 260 at 80%.
550's about 320 bhp at 80% duty, 400 at 100%.
24 March 2010, 05:02 PM
#10
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the person who mapped my car told me, my inj and maf were all but maxed if i wanted it safe - and i beleive him
a fpr was mentioned but again maf was on the limits anyway
so i could run the 660's and a z32 maf, and get it rescaled and mapped to up the boost again
then the turbo becomes the limiting factor?
really im just looking for 350ish - until it goes pop
its not a daily driver and doesnt get ragged everyday, so hoping to get a decent bit of fun before the end.
im not trying to kill my engine, but when it happens , it happens - i want the 2.1 conversion available on here.
a fpr was mentioned but again maf was on the limits anyway
so i could run the 660's and a z32 maf, and get it rescaled and mapped to up the boost again
then the turbo becomes the limiting factor?
really im just looking for 350ish - until it goes pop
its not a daily driver and doesnt get ragged everyday, so hoping to get a decent bit of fun before the end.
im not trying to kill my engine, but when it happens , it happens - i want the 2.1 conversion available on here.
24 March 2010, 05:26 PM
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that doesnt sound right to me, dont know the difference between v1 and v4 but i thought 350 was about the max, there was someone running 350 on a vf24 with just induction and fmic and pfc
24 March 2010, 08:19 PM
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^^^ thats why ive got 660cc injectors????
stedee, theres a few differences, inlet tract routing, turbo, forged pistons, ecu ect
stedee, theres a few differences, inlet tract routing, turbo, forged pistons, ecu ect
24 March 2010, 08:30 PM
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I was recommended a Q45 MAF which was fitted then mapped on Sunday, apparently these MAF's never go.
Bought one from Florida on eBay, cost £55 delivered in 1 week.
Neel
Bought one from Florida on eBay, cost £55 delivered in 1 week.
Neel
24 March 2010, 08:47 PM
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you got a link mate
who mapped it if you dont mind me asking?
does it overcome the restriction problems of the standard maf?
what ecu are youy running?
lol a few questions there lol
who mapped it if you dont mind me asking?
does it overcome the restriction problems of the standard maf?
what ecu are youy running?
lol a few questions there lol
24 March 2010, 09:12 PM
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eBay link:
Infiniti Q45 MAF Mass Air Flow Sensor Nissan P60 : eBay Motors (item 370344624939 end time Mar-09-10 09:26:07 PST)
Mapped by Fiestaboy- Perfect Job!
Apexi Power FC..
I believe this MAF works well with the Apexi ECU.
Cars running perfect now much more boost too.
Infiniti Q45 MAF Mass Air Flow Sensor Nissan P60 : eBay Motors (item 370344624939 end time Mar-09-10 09:26:07 PST)
Mapped by Fiestaboy- Perfect Job!
Apexi Power FC..
I believe this MAF works well with the Apexi ECU.
Cars running perfect now much more boost too.
24 March 2010, 09:28 PM
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24 March 2010, 09:31 PM
#19
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fiesta boy mines a 94 sti mate
still worthwhile?
i basically just want it to enable getting the power up
my ecu's a apexi power fc
still worthwhile?
i basically just want it to enable getting the power up
my ecu's a apexi power fc
24 March 2010, 09:36 PM
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Z32 (nissan 300ZX) is a direct fit to your existing airbox/induction kit, and will support a lot more airflow than the standard one - Just make sure you get the correct wiring plug with it, in order to solder up to your existing loom
25 March 2010, 12:40 AM
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MAF runs out of scale / volts when the airflow is beyond a certain flow.
Need as said above a bigger MAF which can be scaled in the Apexi PFC to suit.
I think it is a Nissan MAF ( off a Z car .. z32 ?? )??? likely that Q45 s above. I got one direct from Japan on last car for about £130 new, not sure on carriage / tax.
Using the calc injector flow per min x no. injectors x duty / 5.5 ( cc fuel per bhp ) we get
444x4x100/5.5 =
440 injectors would be good for about 320 bhp at 100% duty, 260 at 80%.
550's about 320 bhp at 80% duty, 400 at 100%.
Need as said above a bigger MAF which can be scaled in the Apexi PFC to suit.
I think it is a Nissan MAF ( off a Z car .. z32 ?? )??? likely that Q45 s above. I got one direct from Japan on last car for about £130 new, not sure on carriage / tax.
Using the calc injector flow per min x no. injectors x duty / 5.5 ( cc fuel per bhp ) we get
444x4x100/5.5 =
440 injectors would be good for about 320 bhp at 100% duty, 260 at 80%.
550's about 320 bhp at 80% duty, 400 at 100%.
When the 440's were in that was 336 at 86% duty. MAF Green label standard
Unless I am missng something in the post of course?
Last edited by mcvicar; 25 March 2010 at 12:43 AM.
26 March 2010, 12:25 PM
#25
Generally as outlined above :
The car is ver 1 STi. 440cc injectors will max out anywhere between 325-340 bhp. Probably 350 bhp or a little more with an FPR.
Have you put in a new fuel pump? Walbro GS341 for your car.
Your turbo with ALL supporting mods will get to near to 350 bhp and typically 330-340 bhp.
Your MAF sensor, I am not sure where they max out but we have them running Apexi Power FC at 350 bhp and more.
What boost are you running. It may be that with a bit more boost and remapping you are pleasantly surprised.
The car is ver 1 STi. 440cc injectors will max out anywhere between 325-340 bhp. Probably 350 bhp or a little more with an FPR.
Have you put in a new fuel pump? Walbro GS341 for your car.
Your turbo with ALL supporting mods will get to near to 350 bhp and typically 330-340 bhp.
Your MAF sensor, I am not sure where they max out but we have them running Apexi Power FC at 350 bhp and more.
What boost are you running. It may be that with a bit more boost and remapping you are pleasantly surprised.
26 March 2010, 12:40 PM
#26
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thanks for that harvey
yes the feul pump is a walbro
peak boost is set to 1.35 bar i think
you have an e-mail re headers mate
cheers
yes the feul pump is a walbro
peak boost is set to 1.35 bar i think
you have an e-mail re headers mate
cheers
28 March 2010, 01:13 PM
#28
McVicar,
I think that calc for the bhp vs fuel is an approximation.
Also depends on fuel presure - increase that with the FPR and more fuel is put in for a given injector size.
V
I think that calc for the bhp vs fuel is an approximation.
Also depends on fuel presure - increase that with the FPR and more fuel is put in for a given injector size.
V
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