Got a std 99 Impreza running a prodrive ecu setup. The tmic has seen better days so going to get a bigger one, don't want to go front mount so just a bigger top mount one. Will I need remap? I'm thinking probably not but any input appreciated

 

Of course not... You'll be fine!

 

Thanks mate. Got a process west tmic on the way now

 

Upgrade the "y pipe", that's where the gains are. The standard plastic, variable thickness is a piece of cr*p!
Either get a silicone or a aluminum one. My setup on my MY99 is 01 WRX intercooler with aluminum Y pipe, I'm pretty happy with it.

 

I've already got an Sti y pipe on my std intercooler to go with my prodrive ecu setup.

The process west intercooler comes with a silicone y pipe that looks better flowing than Sti y pipe so I will use that and hopefully get a bit of a gain.

 

how much did the process west cost you?? im guess mega money?

a newage WRX intercooler for about £30 is more than capable on a classic running prodrive ecu setup

 

Got one second hand for under £300.

Was thinking of going new age but they take some messing around to fit and it's hard to find one in mint condition.

The process west is a straight fit, comes with a matching air/scoop duct and adds a bit of bling to the engine bay.

 

that's not too bad then being second hand and contains the duct also.

 

U ran an sti tmic on my bug wrx with out a remap for about two years with mo issues and was running spot on on rollers. Id say it would get the best gains with a map or tweak. Im sure its only fmic that may cause an issue with out a tweak. What intercooler you going for? I hear newage wrx items work well on a classic with some minor fabrication

 

Process West TMIC is very similar to Grimmspeed TMIC, which I have, connected to an SC46 on a 2.1 stroker with supporting mods. Remap last week managed to get 442hp and 390ft/lb . . . Getting 1bar @ 3600 and 1.8bar @ 4100. . .not too shabby for a TMIC!

 

being running the process west tmic for a couple of weeks now and it's definitely released a bit more power. Car feels smoother overall and more free reving , biggest improvement is off boost. Probably the better y pipe design giving the improvent rather than the lower temps. Really happy with it.

 

Glad to see you're getting some positive results from fitting the PW TMIC, keep us updated if there are any power mods

 

Had a bit if an issue this morning. It was pretty cold and when coming on boost the power cuts and then comes back. Done the same higher in the rev range as well. Didn't want to push it after that so just took easy.

Must be overboosting or can't fuel enough or something? Any ideas what Is happening and how I can solve it?Might have to switch back to the std cooler as I don't want to pop the engine.

 

Looks like map needs addressing, which tbh i'm not that surprised by.

When ever making a change like that you should always get it checked out on a dyno rather than just assuming. Just saying it's not a big change so will be fine is really bad advice.

 

Does overboost register a fault code?

I just did a check on my lunch break and I'm getting 24 back which seems iscv related. Two long pauses and four short. It could be 14 if the first pause doesn't count...

The car did idle funny the other day but I turned the car off and on and its been fine since. Maybe the fault code I'm getting is related to that rather than the issue I had this morn....

Any other ideas on what I can check before I book it into to have the fueling checked.

 

nope, but can blow up the engine so keep it off boost till its looked at.

Get it looked at pronto

 

As above,it's not just fine to change parts which alter the flow or temps etc without at least a map check.
Bigger tmic will still lower charge temps and the ECU can only compensate to a certain degree.
Cold weather brings higher baro so yes your boost will likely overshoot the set maximum boost and then fuel cut.

 

This kind of response always has me worried. No thought given to individual circumstance, and complete immunity from consequence.

 

Not to mention clueless

 

Anyone got any recommendations of where I can take it to be looked at. I'm based in Windsor.

Going to keep it off boost until I can give it a proper check over on Saturday. If I can't spot anything I will put the standard cooler back on and book it in to be checked. I can fit the pw cooler in about 20 mins so I can do it when I get there.

If it is over boosting is there anyway I can stop it without a remap? I was never after loads of power just a bit of poke for b roads hence why I went the prodrive ecu route.

 

A crude way to stop it over boosting if you cannot alter the Map on it currently would be to put 1/2 turn of slack on the actuator Arm rod .

 

100% needs mapping I blew my vf28 by booting it with new top mount on way to mappers

 

recheck all your pipe work, boost pipes from solenoid to turbo etc incase youve upset them, knocked one off

changing a top mount is no big deal and shouldnt require a remap especially on a classic.

i ran a MY99 classic on PPP ecu with Newage WRX intercooler and a Sport cat without issue for over 4yrs.

 

I reset the ecu last night and tightened all the boost hoses. Ran fine this morning but it wasn't as cold today.

Just ordered up an obd tool so I can get live data from the ecu and log it. So if it happens again I will have a better idea on what's going wrong.

 

Process west top mount flows way more than even a new age STI, let alone a wrx one.

 

yes fair enough but he doesnt need a remap. it can be simply checked over and there are ways and means of controlling boost build up without the remap something as simple as a different pill will correct it

 

If boost is altered, it may well need fueling and timing adjusting.

 

No point doing it half assed, get a remap and make the most of it

Otherwise just replace like for like and leave as it is

 

The boost isnt altered though, its still targeting the same boost so in this case wouldnt need fueling or timing adjusted hence no need for a remap.

similar to when people put decats on classics they overboost, and all that is done is pill hole enlarged slightly to make boost build easier and hence your not £500 out of pocket for a remap on a td04 turbo

 

depends how much the car is worth, why spend 500 on a remap on what could be a 2k car. farcical

plenty can be done on classics even on std ecu they run ridiculously rich and is well known for years they can take extra boost without issue on it.

yep so spend 500 if you want, or use your common sense and see what can & cant be done without the "ohh youve changed something REMAP REMAP REMAP approach to everything"