What size injectors are good for 350rwhp?
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What size injectors are good for 350rwhp?
Well, it turns out that my 850s in secondaries are low impedence so I need to get new secondaries. I'm thinking if I should stick to 850s or get bigger ones since I'm looking to bump up the boost up to 12-13 psi. I'm running a upgraded turbo but don't know the spec... it made 285rwhp@10psi. So I'm assuming that I'll probably make low 300s with the boost bumped up but to be on the safe side, I want to have enough fuel to support 350rwhp safely. So what size injectors do I need for this? Do I need to upgrade only secondaries or both primaries and secondaries? Thanks in advance for you help
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you are going to need 3775cc/min of fuel at least to support that. you can divide it any way you like as long as you don't starve the engine while only running primaries(<3800) 850 in primairies and 1050 in secondaries. or something close to that.
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i just sent my 550cc high imp. injectors off to RC Engineering to get bored out to 850's. just doin my secondairies right now. i'll go 720 primaries later.
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what ECU are you running??
if stock with piggy back go with 4x 720 or so. you'll want bigger primarys.
if standalone. 550 / 1600 is common now.
who ever said you need 800 / 1000 to make 350hp doesn't know anything.... 4x720 is good for 400RWHP.
if stock with piggy back go with 4x 720 or so. you'll want bigger primarys.
if standalone. 550 / 1600 is common now.
who ever said you need 800 / 1000 to make 350hp doesn't know anything.... 4x720 is good for 400RWHP.
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Originally posted by Scott 89t2
who ever said you need 800 / 1000 to make 350hp doesn't know anything.... 4x720 is good for 400RWHP.
who ever said you need 800 / 1000 to make 350hp doesn't know anything.... 4x720 is good for 400RWHP.
With stock primary injectors you'd need at least 1000cc/min secondaries to support 350rwhp, but as Scott mentioned you need to be careful of running out of flow below 3800rpm, as the stock primaries can only support ~150fwhp on their own.
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Well, I spoke to my mechanic and he already started working on my car and got my fuel system ready already... He just put in new 850s in so I have 550/850 combo. He said he would start next week when the parts all come in... oh well. I guess I'll just shoot for about 300rwhp or a bit more for now. I have Microtech ECU btw.
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Originally posted by Sponge Bob Square Pants
550/1600 is generally enough up to about 525 or so rwhp.
550/1600 is generally enough up to about 525 or so rwhp.
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Originally posted by Scott 89t2
what ECU are you running??
if stock with piggy back go with 4x 720 or so. you'll want bigger primarys.
if standalone. 550 / 1600 is common now.
who ever said you need 800 / 1000 to make 350hp doesn't know anything.... 4x720 is good for 400RWHP.
what ECU are you running??
if stock with piggy back go with 4x 720 or so. you'll want bigger primarys.
if standalone. 550 / 1600 is common now.
who ever said you need 800 / 1000 to make 350hp doesn't know anything.... 4x720 is good for 400RWHP.
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Bigger<>better
Bigger injectors aren't necessarily better, and if you add two more aux injectors with a fuel pump running them at 80% duty cycle two more 550's will give you that kind of HP.
People these days, however, are running 1600's as aux injectors, and then adding two more 1600's. An ECU upgrade and a new fuel pump can also be helpful.
People these days, however, are running 1600's as aux injectors, and then adding two more 1600's. An ECU upgrade and a new fuel pump can also be helpful.
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