:::RHMT::: Real Home Made Turbo
General Category => General Discussion => Topic started by: Towdogg on April 08, 2009, 12:37:37 AM
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I have a 75mm Vitara D16Z6 with .57 trim and 440cc injectors...
What is the max amount of boost I can run on the injectors before they dry up... :evil:
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29.1189
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Approximately 29.1189
Fixed.
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Approximately 29.1189
Fixed.
no u fucked it up :somb:
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haha, 450cc injectors should max out around 300 hp at stock fuel pressure.
I'm thinking they might support more with a decent FPR, but I'd recommend upgrading the injectors instead. Delphis are cheap
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29.1189
So the post whoring begins! Get a job! :somb:
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boost is irrevelant. it is all about the power. What fuel pump?? What base fuel pressure?? what cams?? any port work?? Theres alot of variables involved,
taking a random guess(assuming you have a stock head/cams and a 255) you should be able to get at least 17-18lbs out of them.
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Fuel pressure makes a huge difference. I have made 190 whp on b16a's all motor with stock injectors. Fpr was cranked up as high as it would go classic b&m fpr.
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I do have the Classic B+M FPR but switched it out for the bigger outlet B-series FPR.
Stock fuel pump...
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chuck i may have a 255 for you i have to raid the shed to find it though
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(34.8MJ/L)*(1L/1000cc)*(440cc/min)*(min/60s)=.2552MW=340HP
Assume approx thermal efficiency of 40% and you get 136HP.
Clearly too low. Where is my error? 440cc/min at base fuel pressure? Some of my conversions could be wrong too. It's late.
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im running 440cc on my b20 vtec turbo and putting down 342hp with them and a walbro 255 fuel pump tuned on crome (but yea their probably about maxed out) :yes: :o
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'bout yay much.
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im running 440cc on my b20 vtec turbo and putting down 342hp with them and a walbro 255 fuel pump tuned on crome (but yea their probably about maxed out) :yes: :o
Did you increase the pressue any with a regulator or is it stock pressure?
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im not sure but i think the pressure is around 60 or something (i had the car tuned by slowmotion-motorsports here in ohio) after i got it all turboed up... i was expecting somewhere around 250whp on 9psi NOT 350whp... but its still going strong no smoke and no problems. next time i pop the hood i'll look at what the pressure is at i cant remember
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(34.8MJ/L)*(1L/1000cc)*(440cc/min)*(min/60s)=.2552MW=340HP
Assume approx thermal efficiency of 40% and you get 136HP.
Clearly too low. Where is my error? 440cc/min at base fuel pressure? Some of my conversions could be wrong too. It's late.
Thermal, yes, but typical engine efficiency is about 20%. Multiply that by 4 injectors and you get about 272HP.
It's pretty typical that these things are good til about 300hp, depending on fuel pressure.
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Damn. 4 injectors. :D