vandal0-0

iTrader: (3)

What size wastegate do you need for a t88 I have the wastegate from my STS kit but its probably not big enough.

FieroZ34

iTrader: (1)

Here we go again. You gave us one piece of information that has no connection with wastegate size. Wonderful.

I'd use dual TiAL 60mm units if I were you. At least we know they won't be too small.

Want real help? Engine size, engine mods, redline RPM, approximate HP on boost, max boost levels to ever be used, etc. Give us something to work with minus "I have this turbo."

bboyferal

iTrader: (9)

^ LOL

You're right, but damn...

smokinHawk

iTrader: (48)

im using the turbosmart 48 mm on mine 346cubes, and lowest setting is like 11psi for some reason

vandal0-0

iTrader: (3)

Sorry for being so stupid FieroZ34 but I wasnt aware you needed so much info.Its a 408 with Dart 225's fully ported with about 12lbs of boost redline about 6200.Ls6 intake,225/225 581/581 113 cam,1 3\4 full length headers and its a STS kit.

98turbls1

iTrader: (17)

I wouldn't go any smaller than a 46mm just because you'll have boost spikes since something smaller won't be able to bleed enough air out fast enough..

Hey Fiero, seriously what's up with being so condescending?? Didn't you get banned a while ago for being a jerk and throwing your infinite knowledge of POS's around?? You don't have to be an *** about everything... We're here to help and I understand about people needing to give more information but try to be a little more tactful about it..

vandal0-0

iTrader: (3)

Thanks for all the help and quick responses guys its greatly appreciated.Also were is a good place to purchase a wastegate

98turbls1

iTrader: (17)

Look at the sponsors... I know that Speed Inc, EPP, FI.com, and some other have them... Just start looking..

DrTurbo

iTrader: (3)

With a 408 and 12psi you don't need anything monsterous. The big cubes help since you won't bypass as much exhaust as lets say a 346. Anything 50mm-60mm will work fine. Even the Turbosmart 48 will do the job.

52172

iTrader: (2)

Just ignore fiero boy he just got back from being banned and obviously did not learn anything from it. Welcome back Fieroboy.

52172

iTrader: (2)

Could you please elaborate on why a larger motor would not bypass as much exhaust as a smaller motor? I was under the impression the larger motor would need to bypass more exhaust than the smaller motor? It is indeed putting out more exhaust than the smaller motor????

FieroZ34

iTrader: (1)

That's alright, we all learn somewhere, but with the huge variety of builds on this forum, from very mild to what was NHRA top fuels in the 90s, every car needs something different.

You'll have a pretty potent setup. I'd honestly go for a 60mm unit, I know TiAL makes a very nice 60mm. A 46-48mm might be sufficient, but there's only one way to find out, and that way could end in disaster. And if you go too big, it won't hurt anything.

As for where to find one, as always you can't go wrong with a site sponsor, but I urge you to check eBay first. If you find a new, never used, name brand wastegate, you can get a top quality unit for very cheap. I got my TiAL 38mm for about 2/3 of wholesale from someone who bought it, then never needed it. But if there are none on eBay, I'd go with a sponsor.

I disagree. The big cubes will mean even more exhaust volume, and at the relatively low boost levels, he is going to need to bypass quite a bit of exhaust. I'll agree on the wastegate size, but by all means a 50-60mm wastegate isn't small!

VegaJim

iTrader: (1)

I have one Tial 44mm gate on a 381 inch motor and ran it with an 88 and a 91. Low boost wasn't a concern of mine so i put a 14psi spring in it and it would run at 18psi of boost, without the boost controler. Wastegate placement plays a big role in controling boost.

02SSLE

iTrader: (26)

I have twin 44's on my setup.

NA$TY-TA

iTrader: (21)

Same WG here.... worked fine with my S88. Going a lil bigger this yr, but also going up in cubes.
CO2 should help a lil...

DrTurbo

iTrader: (3)

Sorry typed faster then my brain......it is reversed.

67Firebird455

iTrader: (27)

I also run the turbosmart 48mm. Works like a champ at low boost too.

DanZ28

iTrader: (5)

Hope a 46mm is fine on a 427 S91 setup cause that's what I got with mine...

67Firebird455

iTrader: (27)

Dan, you're going to be running a decent amount of boost though too buddy. 46mm will be fine, **** even a 38mm. Only reason to go big is if you're running low boost and a ton of exhaust volume that you need to bypass to avoid creep.

DanZ28

iTrader: (5)

Cool, Thanks. I was getting worried there for a minute .