DIY Alky for 6# supercharged Lt1 V8

[96 WS6]

First off I am new to this board but I post regularly on camaroz28.com. So far I have had a lot of help from Razor (alkycontrol.com), he is guru status mad props for all the help so far. I have been doing a lot talking with him about this DIY alky setup I'm trying to do. I was going to get a controller for the pump but I have decided to use a simple pressure switch until I start to push more boost. So far I have a SHURflo 2687 and a converted winshield fluid reservoir with a pickup on the bottom as an alky tank. I was going to run a Hobbs series 5000 pressure switch. It's a high quality pressure switch with an adjustable set point of 1.1-3 psi factory set at 2 psi with a tolerance of plus or minus 0.5 psi. Would that be a good switch to use or should I go for the switch that has a turn on set point of 0.5-1 psi with a tolerance of 0.3 psi??? That was my first question, which pressure switch.

Second question: what nozzle should I use??? M10, M15???? I want it to work properly pushing only enough alky for under 6# with the pressure switch right now and enough for say 12-15 after I rebuild the motor for more boost. Or two M10s??? Or an M10 now and an M15 later???

So those were two questions that I really need answered. Everything else has been taken care of. Thanks!!!!!!!!!

 

[Red Regal T]

Probably either pressure switch will do the job. You're not running that much boost. On the nozzles, that's just trial and error. You could get both sizes off of Razor for just $20, so it's not like you're spending a bunch of money to get things sorted out.

 

[salvageV6]

I'd buy 2 M10's and 2 M15's from McMaster Carr.

You can get your plumbing supply fittings and hose there too.

Very good prices.

Having the spare nozzles on hand when you up the boost and may go two stage or more nozzles is good planning.

 

[sstock]

I seriously doubt that you will be able to shoot that much in there at that low boost, that motor will fall all over itself.
I played with DIY alky this year on my 351 supercharged LIghtning.
I had a 2 stage system actuated by 2 hobbs set at 2psi and about 6psi. I ran a M2 nozzle on the first stage and M7 on the 2nd stage.
Anymore than this it was starting to slow down.
I like the Alky on the street with 92 Oct. but on the track wasn't worth beans. I lost 2-3/10's and 4mph compared to race gas.
I was running 70% ISO.
Remember we are not running the boost that these guys are and their turn on points are well into the boost ranges that we won't touch.
My power level was around 425 rwhp and ran a best of 12.6 with alky and 12.29 on the race gas.

However, if you are getting the dreaded rattle then a M4 nozzle will cure that in my estimation. If it doesn't I doubt hitting it with more alky will not help a bit, you will have to pull timing.
Just my .02
Good luck

Steve

 

[Razor]

Originally posted by sstock
I was running 70% ISO.

maybe maybe that was a problem... compression, timing, fueling are all parts of getting the system rite. The more water you blow in..sometimes has ill effects.

Cutting down injectors and spraying more aggressively straighter methanol may get you that "race gas" tune..

Its not like McDonalds..it takes work ..

Spray on point is dictated by the engines ability to flow/make HP.

99 WS6 Good luck and welcome aboard

 

[sstock]

You have a point with the ISO, but I haven't had time to work in some Meth.

I do think that tune will never be optimum when you control the on point with a alky shot with an "on-off" Hobbs switch.
If you can find away to phase in that shot (large nozzle)gradually I think the results could be OK, especially as you say, pull fuel and add Alky.

Later
Steve

 

[Razor]

Wonder how you could could progressively control the injection process of the alcohol..

 

[99Formula]

Originally posted by Razor
Wonder how you could could progressively control the injection process of the alcohol..

I hear there's this guy in Florida that knows how to do it, but that's probably just a bizarre rumor, not unlike the Bermuda Triangle.

Peter