B_Swapped93

my new manifold has a t4 flange my current 5858(.63 a/r) has a t3 from when I had my ramhorn, my question is can I simply buy a t4 flanged exhaust housing?. I see online you can buy just exhaust housings in t3 or t4 flange and assume ably just swap them out?. it only lists a t4 in twin scroll for the 5858 so i'm assuming I cant use that, the turbo is new so I could sell it at no loss and get a ball bearing 6262 twin scroll but I would prefer not to with out very weak cdn dollar.

wantboost

iTrader: (2)

It has to be machined for the turbine wheel. They make t3 housings for the 5858 so I'm not sure why you only see t4. And fyi precisions housings aren't twin scroll, simply divided. Huge difference.

B_Swapped93

thanks I need a t4 lol I mean I don't see an "open" t4 for the 5858, I have t3 which isn't of use to me now. ok didn't know that just assumed it was their wording of a twin scroll.

turbohatch96y7

iTrader: (15)

Why not chop the flange and weld a t3 flange?

T4 housings are huge

B_Swapped93

It's a twin scroll manifold(full-race top mount) I don't think that would work well, I know I should have a twin scroll turbo to go with it technically but other things need to be bought first.


trust me i'd like to do it as simply as possible and if I end up needing to buy a twin or divided t4 so be it but that's not cost effective.

TheShodan

iTrader: (14)

Hell, he doesn't even need to chop it. He can redrill the T4 divided flange (there's enough room) to fit the bolt locations for a T3 housing.

T4 housings, will truly make that turbine wheel work its head off to be efficient in even the smallest T4 volute.

Like so..

wantboost

iTrader: (2)

Oh I thought you meant you need a t3.

Your only option might be too find an open volute t4 housing for a smaller turbine wheel and have it machined for the larger one.

Why go open volute? You'll lose a lot of the response and recovery characteristics of the divided turbine housing which will ultimately wind up turning the turbo into a total response turd. Granted running a t4 based 5858 on a Honda motor is a bit weird as it's overly large for no reason... The power ceiling of a 5858 should never require a t4 housing unless it's going on a very large displacement motor like twins on a v8. You could run a t3 based 5858 and make the exact same power but with a much better powerband.

TheShodan

iTrader: (14)

He won't receive any of the divided housing benefits even if he had a divided flange because the A/R with respect to turbine wheel he's using won't show any "spool" characteristics or benefits.. Remember the differences between twin scroll and divided housing? The volute alone in either case is still open after the divided flange, so the exhaust pulses will merge anyway.

For every divided housing that people use on "street cars", I've found that a slightly smaller T4 open turbine volute can do the same [I]exact/I] thing.

B_Swapped93

Thanks for the reply's, the manifold is still in the box and could very easily be returned to the shop I got it from which is starting to look like the better option. Just get a t3 flanged one from sheepey I didn't see a t3 option from full race when it was ordered thus ending up with the t4.

TheShodan

iTrader: (14)

Sometimes you have to just CALL... instead of worrying about available options on the site alone.. Site options are for more popular options that their core base would want, but it doesn't necessarily show the only options..

Its amazing how flexible these companies are on mass-customized orders like exhaust manifolds when you actually contact them.

Of course I'd never use a turbo the size of a 5858 on a top-mount to begin with, but that is beside the point, so I won't deflect.

I'm just sayin'.

B_Swapped93

So I could simply ask for a "divided t3" from full race or sheepey? that's all I really want, regardless if it's pointless or not. I could redrill the flange too it's still in my room, but re-drilling it will drop the resale value. trust me all these broke kids down here look for the slightest reason to low ball.



i'm guessing v band isn't as simple as it sounds for turbo to manifold wise.

TheShodan

iTrader: (14)

No. a Divided T3 is not the same flange as a Divided T4. You can't simply ask for that either. Just redrill your current flange for an open T3, and be done..

NotARaCist

iTrader: (1)

His turbo has Lupus?

TheShodan

iTrader: (14)

More like amyloidosis..

NotARaCist

iTrader: (1)

Nah, it was obviously born as both a turbo and supercharger, so it's parents had to decide, and lie to it about what it really was.

TheShodan

iTrader: (14)

After all... Everybody lies... Now, I didn't say everybody lies all the time; but all people lie at least some of the time.