My hx35 dyno

[240slidekat]

I noticed that you where running the basic ebay manifold with the old t72 setup and im assuming your using the same manifold. Are you seeing any issues/lag with the divided t3 turbo and un-divided manifold flange??

I ran a divided super t70 on a undivided manifold when I had my b16 turbo. Hitting full boost at 6 grand.

yea same manifold. you can see on the dyno graph where i hit full boost. its around 3800rpm so considering the size of the turbo its not laggy at all.

what size hotside you have on that holset?

12cm2

[Cjmartz2k]

Ah, ok. That's why the spool is a bit slower than expected. You don't have a split pulse manifold. You should look into one. It'll help a lot with spool, and top end power also according to a lot of people.

[jacksonbrown]

Im running the 18cm2. It's a lot different than stock turbo, but doesn't really feel that bad spool wise. All things considered I think it was the best thing I did to the car. Car will actually hook a little better out of the hole.

[Cjmartz2k]

Jackson, 18cm on what holset? I don't think they go up that high on HX35's, which is what we are talking about. Do you have a HX40 or H1 series?

[meet07]

Ah, ok. That's why the spool is a bit slower than expected. You don't have a split pulse manifold. You should look into one. It'll help a lot with spool, and top end power also according to a lot of people.

how much more improvement are we talking about?? And how sooner will boost come on??

[jacksonbrown]

it's a hx35- stamped on ID tag, and it was a new truck take off so I dont think they changed the exhaust housing

[Cjmartz2k]

how much more improvement are we talking about?? And how sooner will boost come on??

Depends, but I'd guess around 400-500rpm. Noticeable for sure.

[meet07]

Well jsut a heads up for those that may possibly want a divided t3 manifold this cat on ebay told me he could take this mani and remover and replace the divided t4 for the divided t3......Figured ill spread the word.





Here is the link>>>>>>>>http://cgi.ebay.com/ebaymotors...ories

[flatrate]

sigh.... people just dont understand the importance of a true merge and good wastegate postion... that manifold

[Cjmartz2k]

Well, that would be better than nothing (not speaking about quality though, just design) but yeah, the pulses will still go down the wastegate runners and revert back up the other which would "mix" the exhaust pulses to a certain extent. To give you an example of how much that matters, the Stec manifold is a similar design as far as the wastegate runners are concerned. While we were trying to fix my boost creep issue on teh HX40, he installed two separate wastegates with completely separated WG runners coming off the mani. My spool times as noted on dataloggit and what I saw on my hand controller were about 300-400rpm quicker after completely separating them. Still, that kind of design is better than a completely open, non-divided mani. That's one of the big things that full race and I think 6boost has over the Stec mani's is the completely seperated wastegate ports. They do cost 3 times as much though, so I would hope so. I've always said, Stec mani's (which is what I run and the owner is my friend) aren't the best, highest end mani's out there. They are, however, a pretty decent design, they are made from thick as quality metals and will NEVER crack, and he fit checks each on for flatness and bolt fitment before they leave. That ebay one looks kinda chincy though. Fin out what kind of steel and how thick it is before you buy anything.

[meet07]

Well, that would be better than nothing (not speaking about quality though, just design) but yeah, the pulses will still go down the wastegate runners and revert back up the other which would "mix" the exhaust pulses to a certain extent. To give you an example of how much that matters, the Stec manifold is a similar design as far as the wastegate runners are concerned. While we were trying to fix my boost creep issue on teh HX40, he installed two separate wastegates with completely separated WG runners coming off the mani. My spool times as noted on dataloggit and what I saw on my hand controller were about 300-400rpm quicker after completely separating them. Still, that kind of design is better than a completely open, non-divided mani. That's one of the big things that full race and I think 6boost has over the Stec mani's is the completely seperated wastegate ports. They do cost 3 times as much though, so I would hope so. I've always said, Stec mani's (which is what I run and the owner is my friend) aren't the best, highest end mani's out there. They are, however, a pretty decent design, they are made from thick as quality metals and will NEVER crack, and he fit checks each on for flatness and bolt fitment before they leave. That ebay one looks kinda chincy though. Fin out what kind of steel and how thick it is before you buy anything.

Thank you....Info given instead of running off at the mouth.

[meet07]

I was just thinking.....do you think your boost controlling issues could possible be the 38mm wastegate and wastegate elbow?? Ive heard that that manifold has spiking issues that cant be resolved unless you delete the original location and have a lil bit bigger pipe coming off the collector...

wow holy run on sentance...lol

[240slidekat]

no it was the boost controller, after i fix the settings it held fine. no spiking but boost creep like a mofo on low boost, on high boost it works just fine.

[meet07]

Question does boost come on like a swicth??.....kinda like VTAK or the to4z turbocharger??

cant wait to see some incar footage.

[240slidekat]

boost comes on somewhat smoothly, it wasnt as bad as when i had the t72, that thing is a on and off switch.

[bounty212]

nice to see some hx35 powa lol.. gives me hope for my rb20. wat injectors/ ecu?

[240slidekat]

750cc injectors and aem ecu