Jump to content
SAU Community

Intercooler Questions

Damo_c

By Damo_c,
in Engines & Forced Induction

 Share

Recommended Posts

Damo_c Collaborator

Damo_c

Posted
Posted

Ok so ive installed my fmic and just went for a drive and have noticed a few things.

1st question - should the pipe going into the cooler at the bottom right (looking at the front of the car) be hot and the bottom left be cold or the other way around?

2nd question - ive wound my t boost all the way down and im still hitting close to 12 pound by 3.5 k but doesnt pull as hard as when i had the stock cooler in, it just gathers boost slowly instead of bang its there, is this right?

3rd question - Is there anyway i would know if i have it done the install wrong? eg, different sounds

4th question - My car now idles around 1k where as before it would sit about 800rpm, is this cos of the cooler?

5th - Do i need to do the self learn on idle again with the pfc, it is untuned atm?

Thanks

Link to comment
https://www.sau.com.au/forums/topic/232484-intercooler-questions/
Share on other sites
Cubes Grand Master

Cubes

Posted
Posted

If its idling high check for a loose hose clamp or vac leaks.

Might be worth grabbing a can of start ya bastard and spraying it around the fmic and all joins to see if there is a vac leak.

A fmic will soften the power delivery. I also was a tad dissapointed when I first went an fmic. BUT what it does allow you to do is run a little more boost and make more consistent power after you give it a hiding. Prior to the fmic mine felt quite crappy in third gear after I had given it a few full throttle runs.

Damo_c Collaborator

Damo_c

Posted
  • Author
Posted (edited)

I know itl be better in the long run with a tune and when i get my new turbo (gota still save a bit more) but i just didnt think it would be so different, it feels like ive lost power and not gained any. Soapy water around the clamps would do a similar thing wouldnt it, if checking for leaks? The blow off sounds sooo much better, bugger putting as aftermarket one on now!

Edited by Damo_c
R31Nismoid Grand Master

R31Nismoid

Posted
Posted

1. Yes

2. Your running a larger cooler, more boost and no tune. Of course its not gonig to be great

3. Not really

4. Vac leak maybe, as stated.

5. No, but that comes as no surprise with point #2. - YOU SHOULD NOT BE TRYING TO HIT 12PSI UNTUNED.

W0rp3D Grand Master

W0rp3D

Posted
Posted
YOU SHOULD NOT BE TRYING TO HIT 12PSI UNTUNED.

So what are you trying to say, that i should not be running a hi flow (to4 front vg30 rear) at .9bar with standard injectors, fuel pump, afm and ecu?

I think im at the limit though, breaks down when it hits 1bar so when it spiked to 1.2 it was not happy at all.

KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted
it may be wrong but from what i have read an untuned pfc is at about the same level as a standard ecu, is this wrong?

I don't know about that but... standard ECU is not much good once you start modifying the engine. The point of a PFC is that you can change timing, Air/fuel ratios etc - untuned its just a waste of $$$ ( and if you've bought it second hand it could have a tune suited to a set-up which is quite different from what you have and could in fact be worse than your fact ecu).

Cubes Grand Master

Cubes

Posted
Posted

The maps are basically a direct copy HOWEVER the load points used for a given airflow value is slightly off as the PFC runs a 20x20 vs the std ecu's 16x16 load map.

As a result the pfc usually ends up running a tad more ignition at wot which usually causes the car to det. In my experience anyway. Depends on the level of tune/mods/boost. Would likely be fine for a car running std boost.

Damo_c Collaborator

Damo_c

Posted
  • Author
Posted

Yes it is untuned, i was guna save some money for a turbo then a tune. I drive the car very easy at the moment. I dont wanna waste getting a tune then in 2 months having to get another tune after getting the turbo. I hit 12 psi maybe 5 times since ive had the pfc put in, yeah i am risking a bit of engine damage but when the car is my daily driver and i need to floor it a bit to let a cop go thru or something like that, which happened only a week or so ago, so be it, but ive been very careful as to change at about 2800-3000 light accelaration so bugger all boost. The tune will be happening very soon cos now youve gotten me all worried. Gota use the left over moeny from my wedding to do so. Ive got the t boost wound all the way down but its still boosting up. The pfc is brand new so there is not another cars tune on it.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • Duncan
      S1 rb25/s14 starting problem

      By Duncan · Posted

      Depending on how long the car sat it is very possible for injectors to be stuck open or closed, I'd get them cleaned and flow tested. Other than that, obviously when the loom changes and the car doesn't start any more....the loom is suspect so some tracing / comparing may be required
    • 25zenki
      S1 rb25/s14 starting problem

      By 25zenki · Posted

      Harness is for a s1 Rb25det, and it is engine and lower harness.  the old harness had broken off plugs and was in very rough condition/exposed wires and splices etc. it is not able to be put back on the car, I could visually inspect to see if they had rewired any pins on the ecu plug. The fuel pump definitly isn’t turning off it’s an external pump and very loud you can hear it. Will look at the other harness tonight, am also going to pull the fuel rail and watch the injectors spray, will update here with what I find. Pretty sure at this point it has to be something to do with injectors because car will fire up on starting fluid and cas is clicking the Injectors. Fuel pressure is steady 43psi 
    • Waders360
      M35 Brake caliper replacement

      By Waders360 · Posted

      Sorry. Front brake calipers
    • MBS206
      S1 rb25/s14 starting problem

      By MBS206 · Posted

      Check the injectors flow evenly, and are actually flowing what you and the ECU think they should be flowing. If it's starting up on starter fluid, you have a fuel issue. Is it possible under cranking your fuel pump is turning off?   The harness you replaced, is that the whole engine harness? Do yourself a test, and drop the old harness on and plug it into the Z32 ECU. It's possible they've wired things different. From memory S1 to S2 is different in RB25 and you may have a wrong loom
    • 25zenki
      S1 rb25/s14 starting problem

      By 25zenki · Posted

      I haven’t pulled the injectors to watch them spray yet but they are clicking from the cas and all of the spark plugs are wet with fuel. I’ve thought the cylinders were being flooded from the beginning and was hoping fuel pressure would fix it. Tonight I am going to pull the rail and watch the injectors spray. Don’t know how to test/diagnose if the plugs are firing in correct sequence but that should be a timing thing and as far as timing goes my car still has the half moon for the cas can only install it 1 way. And my mechanical timing is 100% correct I posted photos above. Confirmed with the balancer on and off. 
×
×
  • Create New...