I had a Divided Cast HKS T4 manifold last year and this year I upgraded to a JHRacing Divided T4 manifold.
I have been impressed from the second I got it. Looks, fitment, everything is great. This thing is STOUT!
I bouhgt it for better fuction, and that is what this review is about.
Spool is greatly improved!
I am running a Full T4 6776 Journal Bearing Turbo with a .85 divided hotside.
I do not have logs of my old HKS peice but I can tell you I was hitting 20 psi about 5800 rpm.
I am still breaking this motor in, and having some turbo issues. I cant tell you when 35+ psi comes becaue I am waiting on new wastegate springs. I am maxing out around 24 psi on the current springs.

RESULTS! 20PSI AT 4808 RPM in 3rd! THAT IS A HUGE IMPROVMENT!
I am expecting 35-40 psi BEFORE 6K.
35psi on my old manifold came around 7Krpms.
This manifold is awesome and helped spool greatly! It seems about a real 1000 rpm faster spool, that is huge!
Thanks Jake!

20 psi at 4800 and 23psi under 5000rpms on this old school, SLOW spooling turbo is REALLLY good



23PSI at 5K

AEM 5 Bar is logged on the far right

Some questions from the dsmlink board answered here:
I have two crappy ebay 38mm wastegates on the car. It was the only thing I went cheap on. Spare me any bs anyone has to say about cheap parts, you ca go f y s with all that. I had to cut one cost corner and this was it.
The weak china springs are little guys in there. I have them shimmed with washers and my MBC maxed out and I can get about 24psi. I have new stronger springs coming. The only thing I do not like is two wastegates, one 38mm worked fine for me but 2 is the only way to be truly divided.

3rd gear, I will do the speed on one but I am two lazy to do both. They are both the same log. It is just a random 3rd gear pull.

4808 rpm - 64.6mph



It is a 2G car. 2.0 6 bolt, Low Compression JE/Eagle motor w/ JMF Race manifold, 3" hot and cold IC piping, 24x12x5 FMIC and BC 280 cams. ALL THOSE THINGS SLOW SPOOL GREATLY! It is a bad spool combinations, but it still spools awesome, ! The cams are also dropped in straight up on stock gears. Stock cleaned up head.
I hope that answered everyones questions.

I have a pretty good size boost leak at the compressor cover. I have not took the manifold and turbo off yet to fix it ( so this is with a large boost leak.

28psi at 5350rpm Still lots of room for improvement also! remember this is a journal bearing 6776, full T4

I've been looking at your ecmlink thread. Glad to see you post here. There's something to the twinscroll setup that all manufacturers currenetly see. There's no reason for all modern auto manufacturers (Mitsu, ford, cummins, etc) to buy into twinscroll and pay all that money for a harder to cast housing, if it just trades flow for spool; as a smaller a/r housing trades flow for spool too. It's not just "hype", like some of the evom guys speculate. They do away with their twinscroll setups when they start modding . It's not some aftermarket company that's devised this form of turbine flow. This is well researched and well documented by builders of mixed flow chargers and automotive manufacturers alike. EVERY auto manufacturer that currently has a production turbo vehicle employs the twinscroll technique.

Welcome to the 21st century! Glad you could provide us with some real world results to back that up.

Glad to pitch in, I wondered if it would work also before I bought it. I am going to try and keep working with it too improve it more (I know there is room for improvement). I will not have time to fix the compssor cover before Import showdown, so I will have to try to get it done next week.
I hit 70lbs.min tonight! 106% IDC ha! GM 3.5" MAS in blow through, 1600's. I am out of pump(s)

OOH! that sounds fun! And you spool that fast with 70lb/min flow... Yea twinscroll is good.

12sec 1/4' &now your at 70lbs? z that must be fun!

Time for some new track time eh?

Awesome man, I just ordered mine should have it next week. Just I will be running the s372. The 6767 is a badass turbo too!

How is it for holding lower boost pressures?