what wastgate are you turbo peoples running

[lowvr 0]

Time to pick up my wastegate very very soon.

I'm inclined to buy this precision as it is very similar in design to the renowned tial 44mm but utilises a bigger 46mm valve, yet retaining the 44m gate

I also like the fast it comes already with a spring tuning kit...

http://www.aptuning.net/Precision_46mm_Wastegate_p/pre%2046mm%20wastegate.htm

anyways...what are you guys running?

[matty.vrt 120]

i use a tial 38mm valve works a treat from 7 psi - 26 psi

[MaidenVR6 26]

38mm Tial works for 600whp VRTs.

I use it from 6-30 psi. No issues.

[golfrabbit33 0]

same

[matty.vrt 120]

do you hafto have a pro maf to run 30 psi maiden or can you run that on the stock 630# file

[lowvr 0]

matty and maiden; have you had any boost spiking issues running the 38mm?

[legvw 0]

Depends what size exhaust housing your going for.

With a t3 a 38mm should be ok, t4 your going to need a 46mm i'd say.

[MaidenVR6 26]

do you hafto have a pro maf to run 30 psi maiden or can you run that on the stock 630# file

Need the pro maf. 95mm housing with oem maf maxes out around 21 psi. Driveability is better with the Promaf.

Buddy of mine is using C2 95mm maf with the 630# file at 18 psi. Did quartermile at 11.6 sec.

No spikes with my wg.

[matty.vrt 120]

no spikes here either thanks for the info maiden

[FishWick 21]

I use a Tial 44m. I got spikes with the 38mm.

And I mean spikes recorded by my ECU, not by looking at a heavily damped boost gauge.

That Precision 46mm looks like a chinese fake to me.

[AJmk2 2]

Tial 38mm and no spikes as of yet

[UnitedMotorsport 55]

I use a Tial 44m. I got spikes with the 38mm.

And I mean spikes recorded by my ECU' date=' not by looking at a heavily damped boost gauge.

[/quote']

Interesting.

What was the requested boost Kev? How far did it spike by?

[FishWick 21]

I'm not using electronic boost control but the wastegate spring is 190KPA. ECU sees 210KPA, but usually for less than a second.

EGT has gone down using a bigger wastegate though.

The Gizzmo MS-IBC has good closed loop boost control for the money, so I might give one of those a whirl.

[lowvr 0]

That Precision 46mm looks like a chinese fake to me.

I can't help but agree the the design is a hard knock off of the tial, but i don't see anything wrong with hat as the tial is very good:

but it does look like the construction is just as good with minor improvements...check this link out

http://www.honda-tech.com/showthread.php?t=2679371

[jims13 6]

38mm spa racing unit.. no problems , once i had fixed my blowing gaskets. holds steady at 1.1 bar at the mo.

[FishWick 21]

That Precision 46mm looks like a chinese fake to me.

I can't help but agree the the design is a hard knock off of the tial' date=' but i don't see anything wrong with hat as the tial is very good:

but it does look like the construction is just as good with minor improvements...check this link out

http://www.honda-tech.com/showthread.php?t=2679371

[/quote']

Yeah I've seen that thread before. You'll notice the 2 important questions about country of manufacture and valve lift just aren't answered. Chinese copies like that cost $50 bucks to the trade, so they're going to big them up for sales and profits reasons. It is a good copy though, I'll give it that!, But I'll put money on it not flowing as much as a TIAL 44, or lasting as long.

[matty.vrt 120]

kev mite the slight spike have anything to do with the springs cracking pressure been slightly higher than the operating pressure.

[FishWick 21]

Could be mate. The spring pressure doesn't always guarantee you'll see that boost on the guage, but I've tried a few in the TIALs and they've been spot on so far.

It also depends where the control line comes from. It's less spikey if the control line is take from the turbo scroll than, say, the inlet manifold.

It's not a major problem though and I prefer how it drives with the 44mm gate :-)

[matty.vrt 120]

Would love to try one but i had to bore the hole on my turbo manifold out to 38mm never mind trying to get 44mm i need to buy the real ATP one but as it works fine its hard to justify.

[lowvr 0]

Would love to try one but i had to bore the hole on my turbo manifold out to 38mm never mind trying to get 44mm i need to buy the real ATP one but as it works fine its hard to justify.

from what i understand even a genuine atp has the same problem.

What equipment did you use to bore this out? - home diy job or given to an engineer?

[FishWick 21]

I use ATP's 38mm to 44mm adapter on my ATP manifold. The hole in the adapter is about 40mm, so I opened up the manifold the same to match, which didn't take long. I just used a grindstone in a drill.

[matty.vrt 120]

i used a roatry bur