3400 RSM S/C - ALL Threads Combined

[ForcedFirebird]

But john_v63400 needs to get in gear.

Especially 4th Now I'm ribbing John .

[john_V63400]

Fine you guys have convinced me. Soon as I put the MAF this week and get it tuned. Then I will work on intercooling my car. I have a ram air style hood. I was thinking I can move
my batery to the trunk. Cut out the ram air box(since its never been cut cause the batery was relocated for the S/C. So the batery is there instead if the air box.
So i put a small I/C there then the ram air would be shoved on top of it.
if i xan make it fit would it work

[ForcedFirebird]

Fine you guys have convinced me. Soon as I put the MAF this week and get it tuned. Then I will work on intercooling my car. I have a ram air style hood. I was thinking I can move
my batery to the trunk. Cut out the ram air box(since its never been cut cause the batery was relocated for the S/C. So the batery is there instead if the air box.
So i put a small I/C there then the ram air would be shoved on top of it.
if i xan make it fit would it work

You won't be happy with that in the end. Subaru's have the "horizontal" mount as it is called, and they all switch to front-mount because of heat soak. The heat rising in your bay will cause the I/C to stay hot after driving for a bit. If anything, use the ram air inlet for the filter so you are drawing cooler air into your charger. If you only cruise you car for a few miles at a time, or only race it, then the horiz mount might be ok for you.

[IsaacHayes]

A front mount intercooler would be better and less thinking to get proper flow and mounted.

[john_V63400]

yeah I see the point but won't the ram air cool the I/C just as well as a front mount. Its the same thing. Except with the intercooler there thier will be concentrated X amount of air. Resulting in more flow directly to the I/C since its concentrated

[ForcedFirebird]

yeah I see the point but won't the ram air cool the I/C just as well as a front mount. Its the same thing. Except with the intercooler there thier will be concentrated X amount of air. Resulting in more flow directly to the I/C since its concentrated

Only when up to speed, otherwise the heat is rising right into the intercooler.

It's like when an electric fan breaks on a car. When up to speed, the air moving is enough to keep it cool, but as soon as you stop at a light, the temps start getting out of control. You have to imagine that the intercooler works exactly as a radiator, except instead of preventing overheating you are are prventing detonation.

[john_V63400]

damn why are u so smart
ironically that electric fan problem just happens to my friends car, LOL
so I get ur point.
If u say impreza guys are moving there ic's then I miss well just keep it in da front

[ForcedFirebird]

damn why are u so smart

Engines are just another machine, results are predictable through logic and understanding.

If you can learn the pricipals of internal combustion along forced induction, you will know what your engine needs, and how to have it perform in the manner you desire.

There are laws that machines have to follow, just like the physical world around us.

[john_V63400]

Dr.Firebird teach me more lol

[zofo61]

What size RSM Pulley are you running anyway...the 3 or the 2.5 and how is it that you are "Turning down the boost" on your setup.......just curious.........clue me in on this cause the only way I know the alter the boost on theis setup is to lower the puley size.........with the 3in pulley that the kit comes with 8 pounds.....with the 2.5in optional pulley 12-14 pounds max......so you must be running the 2.5 pulley............but how are you turning the boost either up or down.............do you have a dial?

[john_V63400]

Its a wiered thing, but Boost comes from RPMs. Im running the 2.5 pully
On a stock shifting GA 3400 you shift at 5650 I believe, thats 8psi of boost with the 2.5 pully.
I know because I changed the pully from 3 to 2.5 and saw a increase of maybe 1 psi. Around 7-8 with the 3 and 8-9 with the 2.5
I was very dissapointed.
i wasnt able to see 14 psi boost until i recieved my HP tunerssoftware and highered my Redline.

The higher I rev the more boost I get.

You must Rev above 6,000 RPMs on the 2.5 pully to get at least 12 psi

Im shifting at 6100 I beleive and Im getting around 12psi

Ive shifted at 6700 once or twice and got as high as 15 psi

So I adjust my boost acording to RPM.

That is why I want a much smaller pully so can get higher bost at lower RPMs

[Superdave]

man, i hope you've upgraded the valvesprings.. stock 3400's won't take that RPM for long..

[zofo61]

Where did you get the 2.5 pulley....did you have it made or did you get raped by Z-spec?..............I want one but will not pay their inflated prices....do you hacve a source...also what gator back belt # are you using with the 2.5 puley and last but not least what MAF are you using stock or LS1?

Chris

[IsaacHayes]

The transmission won't like shifting that high either for long.

[RedBird]

Its a wiered thing, but Boost comes from RPMs. Im running the 2.5 pully
On a stock shifting GA 3400 you shift at 5650 I believe, thats 8psi of boost with the 2.5 pully.
I know because I changed the pully from 3 to 2.5 and saw a increase of maybe 1 psi. Around 7-8 with the 3 and 8-9 with the 2.5
I was very dissapointed.
i wasnt able to see 14 psi boost until i recieved my HP tunerssoftware and highered my Redline.

The higher I rev the more boost I get.

You must Rev above 6,000 RPMs on the 2.5 pully to get at least 12 psi

Im shifting at 6100 I beleive and Im getting around 12psi

Ive shifted at 6700 once or twice and got as high as 15 psi

So I adjust my boost acording to RPM.

That is why I want a much smaller pully so can get higher bost at lower RPMs

That's not really weird at all, that's how all superchargers work. they obviously run off the belt, so the faster the motor is turning, that faster the S/Cer is turning. Spin faster = compress more air = higher boost @ higher RPM's