[parish8]

I changed the title slightly and hope to document the various fuel system parts limits over the next few months.

i don't have all the numbers but a smart friend of mine who also has a gen6 Camaro and is going turbos has been looking into it.

first thing we probably run out of fuel below 500rwhp on e85. the zl1 has already been proven to over 600rwhp on e85. the logical choice would be to try a zl1 pump but he cant find any part numbers yet. maybe someone has a line on a zl1 low pressure pump?

the next best thing and maybe the exact same thing would be a 2016 ctsv. it is an alpha platform and an lt4 just like the zl1 he has been able to find that pump assembly for $150 and a control module which may or may not be needed for $50. no idea if these parts would plug and play on our cars but they might.

this seems like it could be such a cheap and easy option that someone must have tried it by now. if no one has tried it we might since it is only $200 to try.

we are both looking for more power than 600rwhp on e85 but the more we can get out stock gm swapped parts the better.

[Master357]

Certainly sounds like a solid plan. Get on CTSVowners.com and see if anyone has over run their stock one and is selling it used.

[parish8]

Originally Posted by Master357

Certainly sounds like a solid plan. Get on CTSVowners.com and see if anyone has over run their stock one and is selling it used.

From what I am reading an auxiliary external pump is the typical upgrade to the low side which would mean everyone would keep their stock intank pump.

I am going to wait a few days to see if anyone knows why it might not work then order one to try.

[Perdieu]

Armageddon did something with two pumps in the bucket but the won't release the details yet :(

[Gmanuel]

Originally Posted by Perdieu

Armageddon did something with two pumps in the bucket but the won't release the details yet :(

Kind of like this?
http://www.fuel-it.biz/e-series-135i...-lpfp-upgrade/
Different platform, but it's for a boosted DI motor, nonetheless.

[Perdieu]

Originally Posted by Gmanuel

Kind of like this?
http://www.fuel-it.biz/e-series-135i...-lpfp-upgrade/
Different platform, but it's for a boosted DI motor, nonetheless.

http://goturbo.net/blog/vlog007 1:24 you can see it

[Atomic Ed]

Here's pumps in a can from Integrated Engineering. They also have a single pump setup.

http://www.performancebyie.com/ie-su...let-surge-tank

Been dealing with IE for years. One of the highest quality companies out there.

However, I'm not a fan of external boost pumps, even though I have one on my Audi TT. Just another fail point with exposure to the elements and extra wiring to corrode.

Do let us know if the CTS-V low pressure pump works out. I would rather go that route than an external booster pump.

[Gmanuel]

Originally Posted by Perdieu

http://goturbo.net/blog/vlog007 1:24 you can see it

Wow, the bucket on these cars is huge, compared to the bimmers. Shouldn't have any trouble fitting two, maybe even 3 LPFPs. (Not sure how 3 would work, or when it would be needed, but I imagine it's possible.)

[parish8]

I did some testing today just for fun. i am currently at 450rwhp on e85 and one would think i could command the fuel system rich to the point i would see a limiting factor show up. i did that today and did not see any indication that fuel system was running out.

i normally command ~.86 lamda or what would be 12.6/1 if we were looking at a gasoline wideband. i have my car tuned for that and it is right on at wot.

i did a test where i am commanding .71 lamda or what would be 10.4/1 a/f on a gas wideband. the wideband actually showed more in the 10.1 range and the fuel system held pressure while doing this. dc went from 5 to 6.1 which is about 20% more fuel. this would suggest the 2017 Camaro fuel system can go to 450hp *1.2 = at least 540rwhp on e85 if na. that is much higher than i would have expected.

i did see a ton of knock while doing this test and wont be trying it again.

it also looks like the 2016 ctsv pump might be the same as the 2017 Camaro ss. http://m.oreillyauto.com/h5/r/oap/si...0401&ppt=C0025

i will add some screen shots here in a little big and a link to the pump info if i can find it. my wife is suddenly hungry so i have to drop everything right now.

[laynlo15]

So Parish I'm going to get my Maggie next week and would like to run e85 and am expecting power in the 540s, are you saying I should be able to run the stock pump with E85 and the Heartbeat in this power range?

[parish8]

1st thing is I have a 2017. The oreliys add only links the 2016 ctsv pumps with the 2017 Camaro ss. I don't know if a 2016 Camaro has the same low pressure pump as a 2017.

2nd I have only tested up to around a 540rwhp normally asperated level. Forced induction will need a richer mixture.

3rd if a stock magie makes 540 on pump it will make more like 580 on e85.

4th on my test run the injectors were open for 6.2ms. The math suggests they could be held open for up to 8ms but some people say they shouldn't be.

So I don't know the answer to your question but I hope to document the exact limits on a 2017 soon. We are also boosting a 2016 this winter and will probably learn if there are any differences between a 16 and a 17.

[wnta1ss]

laynlo15, for E85 at that power level with a supercharger, I really think you're going to need more pump. You will need more fuel than an NA engine of the same rwhp for 2 reasons that come quickly to mind: richer AFR needed for forced induction, and the crankshaft drag of running the supercharger. You'll have the intake manifold off anyway to do the Magnuson, good time to do the LT4 pump I'd think.

[laynlo15]

Isn't the pump in the tank? Under the manifold? Is that what you meant?

[parish8]

There are 2 pumps. The intank low pressure pump and the under the intake high pressure pump.