are GTP injectors enough?
are GTP injectors enough? i've searched and came to the conclusion that when the GTP injectors are used in an lsx application they fall somewhere around 39#. i also read that many people have used them north of 500whp in boosted applications with no trouble. my question is this:
will the GTP injectgors support a n/a 13:1 374 on e-85 fuel? expecting 500+ wheel through a 4500 stall and th350. also plan on running a 2 stage plate setup ~150-200 hp. i think the injectors will work on motor, but i'm not so sure about the n2o, simply because more e-85 will be used than "regular" gas. i believe it's ~30% more. also, if the injectors work out on motor, would it be feasible to add 116 cam 2 leaded race fuel to the e-85 for n2o passes? or will the mixing of fuels totally rail everything?
will the GTP injectgors support a n/a 13:1 374 on e-85 fuel? expecting 500+ wheel through a 4500 stall and th350. also plan on running a 2 stage plate setup ~150-200 hp. i think the injectors will work on motor, but i'm not so sure about the n2o, simply because more e-85 will be used than "regular" gas. i believe it's ~30% more. also, if the injectors work out on motor, would it be feasible to add 116 cam 2 leaded race fuel to the e-85 for n2o passes? or will the mixing of fuels totally rail everything?
on motor? i think on motor alone they will be enough. the car will see very little n2o as the setup won't work too well with it. i will start out with the GTP injectors and wait to hear what the tuner has to say. the car will be worked with and adjusted for a LONG time on motor before i even consider spraying it, i have a feeling it's going to test my patience with no power adders.
On The Tree
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In my 3800 S/C Buick i maxed them out at around 9lbs of boost, ~300hp. I'm using Lucas 42.5s now and they are nearly maxed at around 14psi. I'm also only using a little V6. I also remembered them flowing around 36lbs, not 39 but i could be wrong.
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the GTP's should be fine on motor. I am running them on my set up right now and spraying a 150 shot thru them.
If you go wet you will be fine as long as your fuel pump is up to par.
I would still log it as i don't know that much about the e85, but I do know it is higher octane than premium. like 106.
If you go wet you will be fine as long as your fuel pump is up to par.
I would still log it as i don't know that much about the e85, but I do know it is higher octane than premium. like 106.
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so...to figure the capability of these injectors i would need to assume 30% more injector with use of e-85, right? so that makes the 39# injectors ~28# injectors with my application. is there a direct corrolation between the use? if so i'll need like 60lb+ injectors. also consider, i believe the ideal a/f is different with e-85, so maybe the corrolation isn't direct.
now i'm confused as hell.
now i'm confused as hell.
I'm running the stock 28.8 lb'ers on my 01 that I've converted to run E85 with. granted I'm not running the spray but I'd think that 39 lb'ers would work. I'm by not means an expert. I could be wrong but I'm also on stock shortblock but with a heads and cam package.
36# @ 3 bars. (97-03 GTPs)
~33# @ 3 bars. (04+ GTPs)
Flow rating is usually at 3 bars pressure (~43.5 psi IIRC), so any pressure change in fuel pressure up will change the fuel flow..there is a formula here http://www.rceng.com/technical.aspx (sorry if they aren't a sponsor, I am not advocating buying anything from them..just some good info)
~33# @ 3 bars. (04+ GTPs)
Flow rating is usually at 3 bars pressure (~43.5 psi IIRC), so any pressure change in fuel pressure up will change the fuel flow..there is a formula here http://www.rceng.com/technical.aspx (sorry if they aren't a sponsor, I am not advocating buying anything from them..just some good info)
They are rated at 4 bar. If you are wanting 500 wheel through a lazy stall, thats a lot of power. If you use a winter blend of E85 ( ~E70) you might be OK. But plan for the worst, if you dont have injectors yet, whats the problem with getting the 60s?
you are right, that is a lot of power. my "budget" for this build is practically maxed out as is, simply because i want big power and it will be done right. it's just the money issue. i will need a huge injector to support that kind of hp. but i will do what it takes to build this thing right. i basically had a complete lsx swap in mind, using a $1,000 roller or [insert pos here]. i have no idea what kind of hp to expect, but i am confident it will easily be north of 600 crank + whatever the 200 shot of n2o adds, i just don't want to take it in the shorts while trying to REsell a practically new set of 60# injectors. it'd be much easier to just get what i need the first time. i hate trying to sell car parts, everyone is a critic.
