I did this a couple of years ago and ran Snow methonal injection. Did it as a test while I was collecting the pieces to build my water/air IC set up. Obviously the tubing length could be much shorter than what I did, but ultimately I just needed the car to run so I could get it up to the shop to build fab the a/w set up.
Car ran fine this way, but was about a second slower in the 1/4 mile from what I remember vs. with water/air IC set up. Found some info I put into a thread awhile ago:
http://www.sccoa.com/forums/showthread.php?t=63906&page=7&highlight=intercoolerless
"Well it's on the road now intercoolerless. At cruise once the car is fully warmed up the ACT temp is around 150-155 degrees. Temperature outside is around 85 degrees.
Under boost ACT temp is right around 120 degrees at wot with Snow System. Around a 30 to 35 degree temperature drop. This is with a stock 89-93 pulley on the supercharger and a 10% jackshaft pulley getting around 13lbs of boost. I have some smaller blower pulleys and will probaly be putting them on and logging some more data."
"I changed the stock sc pulley and 10% jackshaft and switched to 10% SC pulley and 10% jackshaft pulley. Cruise ACT is still around 150 or so degrees, but it really heats up a bit more vs. stock pulley and 10% jackshaft. I am seeing about 17lbs+ of boost, up from 13lbs before. ACT temp is reaching 180-185 degrees under boost wot in third. I'd hate to see what the ACT temp is without the boost cooler!"
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"Installed larger .675 jet in the Snow System and it
cooled the car down quite a bit. The air outside was
a little cooler too. Under boost 17lbs wot in third
a/f was around 12.2 and ACT temp was around 143 and
decreasing as I came up on around 5700 rpm. I was hitting around 185 degree ACT temp with smaller nozzle. Good stuff and pretty amazing without an intercooler on the car Going to track on Sunday."
"Day was warm about 82 degrees or so and was somewhat dissappointing in a way. I was seeing ACT temps peaking at around 180 degrees plus while running through the traps. A/F was pretty solid at around 12. I could feel the car pull timing once it heated up. What a difference cooler air makes as show in earlier posts and just third gear pulls, not a full out quarter mile run through the gears.
Track was prepped bad so my MT ET Streets wouldn't hook and my best 60 foot was a 2.11. I ran two 13.77 quarter miles at 100.XX mph. Guess I would be the first XR7/SC to run 13's without and intercooler On a good track and cooler weather I think I could run a low 13 set up this way with lower ACT's and not pulling timing. With my old air/liquid intercooler and an SMC alcohol injection kit I ran a best of around 12.6 last year.
So there is the data running without an intercooler and using Snow Injection System, it is possible to do but your better off with an intercooler in my opinion unless you have some decent cooler temps outside and not running some serious overdrive on the blower."