![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
#1 |
Newbie
Join Date: Jan 2021
|
![]() I come from the whiteblock world, but have a 745 inbound via trailer later this week. I'm new to redblocks, and could really use some knowledgeable input. I've spoken with prior owner, it has a B230FT with generic ebay T3, but 700CC injectors, IPD turbo cam, 3" TB, FMIC, forged pistons and rods, meth injection, it's an unmodified 8v head and the block has piston squirters.
I'd like to get a bigger turbo ordered, what would be something that would work well with the existing mods? Anything else recommended? Sorry if I'm leaving anything out, this purchase was a bit of a whim. I was looking for V70's and this 745 popped up and I was intrigued. Last edited by CFStark77; 01-16-2021 at 02:47 PM.. |
![]() |
![]() |
![]() |
#2 |
Board Member
Join Date: Jun 2020
Location: Finland
|
![]() Holset hx40 super, with 18cm2 exhaust housing, works at 350->650hp...
Wakes up early with GOOD tubular equal lenght twin-scroll exhaust manifold. Or a hx35super, good for 300-500hp. |
![]() |
![]() |
![]() |
#3 | |
Newbie
Join Date: Jan 2021
|
![]() Quote:
Also - unrelated, but hopefully you might know. I see 531 heads available online, but they're advertised as being previously used on freshwater marine engines. Are those the 8v heads that people swap onto the B230? |
|
![]() |
![]() |
![]() |
#4 |
Board Member
Join Date: Jun 2020
Location: Finland
|
![]() Litle modifioiding needen to exhaust manifold, easy job.
|
![]() |
![]() |
![]() |
#5 |
Newbie
Join Date: Jan 2021
|
![]() |
![]() |
![]() |
![]() |
#6 | ||
Board Member
Join Date: Feb 2011
Location: Granville, MA
|
![]() Quote:
Quote:
Have you used these turbos on your own car? Yes it is. Don't hang your hat too heavily on the whole "freshwater" engine thing. Finding one that doesn't have a chewed up #4 exhaust port with a round steel sleeve hammered into it is pretty rare. If you do find one clean enough to just use as-is, people are generally asking a (fair) price for them that makes working out a 530 start to make more sense. I've had and dissected 531's and heavily worked 530's and the 531 isn't any kind of magical thing. |
||
![]() |
![]() |
![]() |
#7 |
Board Member
Join Date: Jun 2020
Location: Finland
|
![]() My friend was using a hx35 and it gives max boost at 3500rpm, but if these are too large turbos, then maybe a TD04HL- 19T is a good choice.
|
![]() |
![]() |
![]() |
#8 | |
Board Member
Join Date: Feb 2011
Location: Granville, MA
|
![]() Quote:
On a stock head, with stock manifolds, with a mild cam? No way, not happening. |
|
![]() |
![]() |
![]() |
#9 |
Board Member
Join Date: Jun 2020
Location: Finland
|
![]() Yes, with a stock head, but k-cam and twinscroll exhaust manifold.
Even hx40 super made max boost at 4000 and some boost at 3500rpm. |
![]() |
![]() |
![]() |
#10 |
Board Member
Join Date: Feb 2011
Location: Granville, MA
|
![]() color me skeptical
|
![]() |
![]() |
![]() |
#11 |
Board Member
Join Date: Jun 2020
Location: Finland
|
![]() wtf?
|
![]() |
![]() |
![]() |
#12 |
Board Member
![]() Join Date: Jun 2003
Location: PDX
|
![]() enough people here have run holsets to know you're wrong. An hx35 with the smallest 12cm housing available doesnt make full boost until 3800-4k on an otherwise somewhat stock motor.
If you're feeling cheap, an He351cw is an excellent choice. If you're feeling like spending some money, a t3/t04e 50 trim or a Borg Warner s256 SX is a decent choice. If you feel like balling out, GTX3071r or Borg EFR 7163. |
![]() |
![]() |
![]() |
#13 | |
Board Member
Join Date: Jun 2020
Location: Finland
|
![]() Quote:
Those super's wake up earlier. And exhaust manifold is a key role with these configurations. |
|
![]() |
![]() |
![]() |
#14 |
Newbie
Join Date: Jan 2021
|
![]() I went ahead and ordered a genuine HX35W, with billet wheel, and just tossed on an adjustable wastegate (1bar to start). My mani/header will come back from the welder this weekend, taking an OBX header, flipping the exhaust port flange, welding in a proper split in the collector, and adding some structure support. Should have it up and running in a few weeks with the new setup.
|
![]() |
![]() |
![]() |
Thread Tools | |
Display Modes | |
|
|