Hi i have a 55sti i have just bought a andy f 20g mods so far
3" full decat
Hrc fuel pump
Heat 7 plugs
Should i stick with my tmic or go fmic cheers

 

I have had that turbo on both and in my opiion its better on an sti8 tmic

 

Thanks steve will i need a 3 port along with harveys headers and uppipe

 

tmic can handle it, fmic gives lower temps and a little more safety, a proper mapper can sort out any percived lag from the fmic so you wont notice it.
If your end goal is what the 20g can provide, stick with the tmic

 

I have Andy F 20 with fmic mapped by Duncan, not lag at all.

 

Ok cheers but will i need a 3port to hold better boost

 

Just buy an apexi boost solenoid as it will work best for what you want.

 

Anoter vote for AVCR, great bit of kit.

I run a 20G with HKS front mount and AVCR, great combination.

 

Ok so avcr Solenoid do i need avcr controller with it and then fmic or tmic what about headers harveys or tubular cheers

 

Adding stainless steel headers will give you more lag but allow you to run more boost due to flowing better, I wouldn't bother with an AVCR to be honest

 

AVC-R you don't need as above,your ECU can control boost up to 1.5-1.65bar without the problem

I would go with Harvey ported headers and his Up pipe.


Jura

 

Thanks steve just want to make sure i get the best out of the car and turbo

 

I was in a similar situation last year, spoke to my mapper and he advised going the front mount route, so i did.

Saying that, last week i did see a Blob STI run a 9 second quarter with the stock top mount....................A film called Born to Race..

 

Ok thanks guys for the info

 

Oye lol, that movie was jokes. Americans hey..

 

The TMIC on your car is capable of handling that turbo, however, when I went from STi 8 top mount to Hybrid GT (not GT2) I picked up a total of 18 bhp after mapping and the air charge temperatures were much lower.
3 port boost solenoid valve with fittings £65.
There seems to be a bit of confusion here about headers.
Ported Subaru headers, DEI heat wrapped with a purpose designed, matched uppipe which is slip jointed, five new Subaru studs also DEI heat wrapped is £369 exchange. We fit here in Darlington for £75 (either the uppipe on its own or the uppipe and headers). Generally, subject to the turbo in use the ported headers and matched uppipe are the best option for lower powered cars. Between 380 and 420 bhp this is a grey area but by 420 bhp the GT2 Spec headers with my trick uppipe become the best option usually. This does not mean to say that ported headers and matched uppipe cannot operate well beyond 420 bhp it is just that the gains become apparent as the power increases which the GT2 and trick uppipe handle admirably.
GT2 header set £445.
DEI heat wrap £105.
Trick 3 bolt uppipe £149.

Just to complicate things further I now do a 2 bolt trick uppipe for those with GT Spec type 2 bolt tubular header sets. Both the 3 bolt and 2 bolt trick uppipes are specifically for use to match GT Spec type tubular headers.

 

Your in exactly the same boat as me Peter, Im staying TMIC as I don't fancy all the hassle of fitting the FMIC at the moment, and it appears that there is little benefit at this level of mods unless your doing serious track action?

I've got a AF20G, and Harvey's ported wrapped headers and up pipe, I plan on running a splash of meth too to encourage earlier spool and power

What is the rest of your spec Peter?

Rob

 

Thanks harvey so do you think i should go with your ported headers and uppipe and rob my current spec is
Full 3"decat
Heat 7 plugs
Aps innerwing induction
Hrc fuel pump

 

I actually went from a tmic to a fmic with a 20g turbo and I hated it, although the engine was safer due to the cooler charge temps (I was running a sort of unsafe apexi ecu) The car lost all its fun as the power delivery was much later and it lost its sharpness.

If your happy adding an extra say 600/800rpm of lag for say 15/20bhp more then go for a fmic.

 

Or get a billet 20G

 

Thats what i dont want steve a laggy car

 

Andy cant billet the old 20g mate he said supplier wont sell the billet wheel need to be a brand new turbo

 

The same rules still apply except you have a billet turbo instead

 

have same car and very similare mods , will be keeping the TMIC as not worth the extra hassle of fitting fmic + you need a induction kit, when sti tmic is fine for this level of power and can keep standard airbox aswell,

3" decat and exhaust
panle filter
800cc injectors
billet 20g
tubulare headers

 

An efficient front mount properly mapped does not create lag as many people who have done this mod back to back will testify. The STi 8 TMIC can handle 400 bhp but ACTs are that much higher and I have given a specific example above showing the additional power available from a change around that power bracket and any additional lag was not perceptible.
If people are suffering lag from a front mount it is either badly designed or bar and plate or it has not been mapped properly assuming the same turbo is in use before and after.

 

I would definately go front mount at this power level. As above, with a decent front mount mapped properly you won't suffer any noticible lag, I know I don't.

With regard to AVCR, I always use one. They are a fantastic piece of kit for the money and offer far more than just basic boost control, but I agree, not essential.

 

I, like the OP, am reluctant to go to a FMIC. Currently nudging 400bhp using an MD321H and standard STi TMIC I'm contemplating something like a SC420 billet and was wondering if there are any TMIC's out there that outperform the STi item? I've seen the Australian Process West version and it looks good and comes with a bespoke splitter. http://www.processwest.com.au/websit.../pw_p_tmic.htm
Anyone used one or something similar?

JohnD

 

What's the reasoning behind not using a front mount ? Is it solely the work involved ?

 

Its the work involved for me anyway do you need to cut the pipes to make them fit

 

this.


lag is a setup issue, not a front mount issue.