Im just wondering if there are any good turbos out there that will make better power than my td04 16g, but with the same fitment so i could you my existing exhaust system etc?

 

Any of the VF series or a front entry td05 16g

 

I meant to say td05 16g.. thats what i have now. The il have to change the dp headers etc for a vf series wont i?

 

Tbh it would be pointless changing to a VF as they will make the same/similar power as your td05, what year is your car? As the 16G is a 90 degree entry turbo, unless modified?

 

I know billet turbo's are meant to be alot better than td05 and vf turbo's.
Not tried one myself, but that's what I'll be looking at as an upgrade for my VF30.

Scoobyclinic sell some one these turbos, but your looking £1000+..

 

Its a v2 sti, so 1995. Its 340bhp now which is the limit on the td05. I have been speaking to brian at cams about a vf36 but obviously it means changing everything

 

If you're willing to spend that kind of money, you could get a sc38 billet turbo...

 

Its how far you want to go though i suppose, better clutch and a 6speed will be needed aswel..i like the td05 and 340bhp is quick enough but its a little laggy, if it spooled abit earler it would be perfect for me..is there anything that can help spool?

 

Harvey ported manifold and matched up will help the spool but will require a remap, other than that its a much of muchness.

 

Mine is a TD05 16g and yes its a little laggy. Simon Roe mapped mine ,
but he wanted me to fit a 3 port to give him better control and at the time he said the actuator was holding it back , I later tested it and found it was starting to open at 0.5 !!

Things that help , change the turbo actuator spring , Kinguwa do a range I ended up buying 0.8 bar 1.0 1.2 springs and find the 1.0 serves the purpose ok for building boost 1.2 bar on a twin port , but if you run 1.45 bar ( I have twin map ) then the 1.2 actuator is slightly quicker.

Check for leaks , the moment you have even the slightest leak it starts to hold back boost build up.

Reduce the volume to fill ( no need for a Front mount IC at 340 or IMO not much point till you get to 380).

If I had the cash , now that I have done a nice rebuild on Sti Pistons ACR s
Id go for a MD321 .

 

Were can i buy these manifolds and the trick up pipe from? Will the up pipe make a diffrrence? As brian from cams said that because mine is an early classic that it will be de-catted anyway? What do you mean by "matched up"? Do you mean matched up to the turbo or matching up pipe?

 

It is available from Alyn at AS Performance, they were created by the late Harvey Smith to provide smooth gas flow to the turbo. Alyn will explain all this to you as Brian does not seem well informed on whats out there for standardish cars

 

I do have a fmic on mine, i was thinking of changing to a bigger top mount as i dont like the cut bumper anyway, but i dont want it to loose the extra cooling....and how did you check your actuator pressure? I dont want to get the upgraded manifold and get it mapped to then him say you could do with somethig else and then get it mapped again

 

I have a very big top mount IC about a 3rd bigger that the Sti v8 one, its
overkill really but it came cheap with the turbo from CX racing in USA. If I did this again Id have just used the Sti one , its fine for the TD05 16G. You just don't need the extra internal volume , you just need a decent amount of cooling capacity , the advantage of the FMIC in my opinion is its not as susceptable to heat soak if you stop in traffic. Its a problem on mine as once the heat rises it acts like a preheater instead , and the only counter to that is to spray water on it.

The WG opening pressure is best measured with a tire presure gauge rigged to a pressure line , the best desription for this is on the COBB site
https://static.cobbtuning.com/suppor...ol_System.html
this really could do with a Stickie.

On the subject uppipe, these also need to be "blown up" so while it makes perfect sense to get the Cat out of them , using a big inner tube diameter may not be a great idea if you are not looking for big power >400 bhp ( that would need a TD05 20g ) So a whacking drain pipe of a uppipe for Peak flow is not always good for maximum torque build up on smaller sized turbos. It might be wiser just to de-gut the standard one.

Id be interested to hear with anyone elses experience on that.

As I think that might be something I might still try , as Im not ever going to be looking for more than 350 hp on my TD05 16G and as Im not going to uprate my clutch and replace my 5 speed , then like you Im also looking just to improve torque delivery with what I have.

 

I forgot to mention , the attachment in my post above shows the Kinguwa actuator, on a TD05 16G you will need PN 2700-816-101 ( 1 bar ) this will give 16 psi ( 1.1 bar) for 1mm of WG opening ( just cracked ) the spring opens 5mm with 21 psi ( 1.3 bar ) if you want to target boost of 1.5 bar you might want to use the pn 24700-816-121 black rated. But that's probably a bit high for reliability on aged Ej205 / and the 16G turbos will be running very high speed and are out of the best efficiency at that point anyway. I'm currently using the 1.0 bar one as it matches Simon Roes Map best and out of respect sentimentaly Im loathed to change it. That allows on his twin map 1.2 bar with a modest tail off in 4th 5th . Then I change it over to the slightly higher rated spring if I go to a track and use the second map which tails off boost the same way but peaks at 1.45 bar. All of this on the 2 port , but I wish I d have had a 3 port fitted as Simon advised , and he struggled a bit with the 2 port on road test we never quite eradicated a WOT stutter that occured at 2500rpm.