Anyone modified a bottom mount manifold for T3? Fitment?

[s15lover]

I have a p12 cylinder head on a built blacktop bottom end and don't have the time to do the twinscroll top mount as I need the car running asap. I'm thinking about buying a t3 flange, buying my housings for my BN gt3071r (gt30 chra) and modifying it to fit. Of course I will be taking my megan t2 bottom mount to the welder to be modified but I'm wondering if anyone has went this route. I will be getting the twinscroll after I move but I just don't have the time to wait a couple weeks for everything. I really need someone who's done this to chime in ...let me know what kind of fitment issue may come into play. I understand I will have to make a custom turbo dump and weld a 38mm flange on my manifold as well.

[codyace]

Rushing a project and cutting corners will only leave you with a kludge job, and a half assed end result.

Here are concerns:

1. Fitment. SUre you can weld a flange on, but will a 30r compressor fit around the motor mount, or on at all? A GT2871r setup is VERY close

2. Downpipe creation. You're gonna spend more money to make a one off downpipe. THis involves time, and fab costs


In the end, by the time you mock it up, modify it all, make the new stuff...you may as well wait for the stuff to come in and do it properly. Mid frame turbos really like the longer runner manifolds, take advantage of it.

[s15lover]

Rushing a project and cutting corners will only leave you with a kludge job, and a half assed end result.

Here are concerns:

1. Fitment. SUre you can weld a flange on, but will a 30r compressor fit around the motor mount, or on at all? A GT2871r setup is VERY close

2. Downpipe creation. You're gonna spend more money to make a one off downpipe. THis involves time, and fab costs


In the end, by the time you mock it up, modify it all, make the new stuff...you may as well wait for the stuff to come in and do it properly. Mid frame turbos really like the longer runner manifolds, take advantage of it.

basically you haven't done it lol...

fitment I already understand the complications that "could" pose a problem...ur post was no new information there ...sorry

I've had a gt2871r with the bigger inlet...didn't have any issues...I was mainly referring to the t3 frame posing size clearance issues with the block/frame/mount.

downpipe creation wouldn't be a problem...I have a great guy that does awesome work on the fly

as far as the frame and the longer runners again no new info there lol

doesn't matter though either way I solved my problem lol I'm going to run a t25 I just scooped up to break the motor in and get me moved to TX ...and just take the twinscroll stuff with me and have the rest rerouted to my new address. Then remove the t25, sell it to recoop, and presto chango (kinda obviously I can't wave a wand and have the stuff changed I'm sure blood will be spilt lol, always cut myself on something, such is the 240 sickness)

[KaminaSan]

basically you haven't done it lol...

fitment I already understand the complications that "could" pose a problem...ur post was no new information there ...sorry

I've had a gt2871r with the bigger inlet...didn't have any issues...I was mainly referring to the t3 frame posing size clearance issues with the block/frame/mount.

downpipe creation wouldn't be a problem...I have a great guy that does awesome work on the fly

as far as the frame and the longer runners again no new info there lol

doesn't matter though either way I solved my problem lol I'm going to run a t25 I just scooped up to break the motor in and get me moved to TX ...and just take the twinscroll stuff with me and have the rest rerouted to my new address. Then remove the t25, sell it to recoop, and presto chango (kinda obviously I can't wave a wand and have the stuff changed I'm sure blood will be spilt lol, always cut myself on something, such is the 240 sickness)
So let me see...
You ask for help/advice/experience, and when you get a response from a well established member, who (while he can be an ass sometimes), has the credibility, and fabrication experience that 90% of this forum doesn't have gives you a legit breakdown and answer, and you dog him out, because he hasn't done this exact project?

You are fucking up man. I may not like listening to others, but when I come on here and ASK for advice/experience/suggestions and I get it, I listen.

If codyace said it's a stupid idea, and you would have more bang for your buck going another route... go the other route. Save yourself the time and effort, and listen.

[s15lover]

Basically I have been a member for almost a year longer. While I do not post in here very often (because I don't need to), and I have more to do, I was asking for people who have decided to go this route, not to already tell me what I knew. I wasn't fucking up or being a dick, I was asking only for people that have decided to do that modification and to state what problems they ran into with that frame size by experience only not what they've read...because everyone can read. Why do you think I bought a t3 frame in the first place? Why do you think I went with a p12 cylinder head? I have plenty of experience with fabwork and modifying stuff to fit right and well. If I were to have gone that route (mainly to save time on shipping stuff, not to skimp on quality) it would've been done right, but as I said I was mainly trying to get people's feedback that had done the modification, don't let post count fool you I'm no newb and I'm a member of a ton of forums and do used part sales across the world. So I wasn't dogging anyone, nor trying to offend anyone, if codyace feels wronged or offended let him chime in and I'll gladly apologize, I'm sure he doesn't need anyone backing him as I've seen him on other forums as well. I'm also pretty sure I've done used parts business with him before as well. Plain and simple, while everyone may do one thing, "innovators" push the limits to find out for sure, (i.e. Mazworx building 92mm square motors, the fwd sr guys pushing bore limits, and the nz guys running stock sleeves to 88mm), nothing ever got accomplished by staying within the mold. This is how I think. If everyone stayed within the "mold" we'd all be running stock ka's still...think about it.

[Davidna2fi]

...stop saying P12...plz... just use VE instead. Most people have no clue about a P12. I am FWD SR, and FYI Mazworx is just copying Andreas Miko and other FWD SR20 guys work. But they are doing it consistently.

[Sileighty_85]

FYI I dint read shit in this thread exepct for the the Op's Post

We've done it before though

Bought a flange ported it and welded it on to the existing one,

This was on a Pulsar GTI-R SR

http://i73.photobucket.com/albums/i235/Neil_85/Okinawa/100_1576.jpg

http://i73.photobucket.com/albums/i235/Neil_85/Okinawa/100_1572.jpg

Worked fine

[S14DB]

The 3071WG model with the T2 flange hits the Motor Mount with a stock location manifold. You have to notch it to clear the compressor housing. I can imagine the larger T3 housing being the same or more of an issue. I have seen it done on one of silkroads S15's. So it is possible, just need to have the angle grinder ready.

Seems like a lot of work just to be redone in a few weeks.

[codyace]

basically you haven't done it lol...

LOL for sure, but that doesn't mean I didn't bring up issues about it. If anythign in my experience, rushing things tends to make for less than desired results, and for a end product that will need to constantly be modified to work with additional modification.

Necking down your engine with the stock manifold (or aftermarket OE mounting location) to a T3 frame turbo is counter productive at best. As I stated, you want to utilize as much flow as possible to help spin that larger turbo...obviously heat helps light them as well, but you want to build the setup to take advantage of the UPPER RPM ability, not spooling it quicker, to give up top end power.



fitment I already understand the complications that "could" pose a problem...ur post was no new information there ...sorry

If you knew it, why did you ask about it? Redundancy is a killer.


I've had a gt2871r with the bigger inlet...didn't have any issues...I was mainly referring to the t3 frame posing size clearance issues with the block/frame/mount.

The 'inlet' has no indidcation of fitment, at all. Well, to a degree, as stuffing the 3" intake around PS and AC takes some creative fitment, but it does work.

My comment was in reference to the larger compressor housing. As stated below, I know some guys are able to fit them on FWD engines, however the mounting is different (obviously) on the RWD setup and interferes (compressor facing backwards on the FWD, forwards on the RWD). I was unsure of the T3 turbine and compressor fitment, but as S14DB stated, I knew the internally gated ones required modification to fit. I could only assume the larger frame and spacial difference that it would not fit.


doesn't matter though either way I solved my problem lol I'm going to run a t25 I just scooped up to break the motor in and get me moved to TX ...and just take the twinscroll stuff with me and have the rest rerouted to my new address. Then remove the t25, sell it to recoop, and presto chango (kinda obviously I can't wave a wand and have the stuff changed I'm sure blood will be spilt lol, always cut myself on something, such is the 240 sickness)

THis is your best plan. Keep it simple until you can do it right. Again, kludging a setup together only results in a half assed result.

...stop saying P12...plz... just use VE instead. Most people have no clue about a P12. I am FWD SR, and FYI Mazworx is just copying Andreas Miko and other FWD SR20 guys work. But they are doing it consistently.

I would have never thought of hearing Miko's name ever mentioned on here. Shame he was so resistant to help most of the time on SR20forum. Smart guy regardless.



Seems like a lot of work just to be redone in a few weeks.

And this was my sentiment as well ; the work isn't worth the result.

FWIW: I'm not much a believer in their twin scroll stuff either, but that's a debate for another day haha.

[inopsey]

The 3071WG model with the T2 flange hits the Motor Mount with a stock location manifold. You have to notch it to clear the compressor housing. I can imagine the larger T3 housing being the same or more of an issue. I have seen it done on one of silkroads S15's. So it is possible, just need to have the angle grinder ready.

Seems like a lot of work just to be redone in a few weeks.

i run a 3071 t2 on a stock manifold(s13) and the compressor does not touch the motor mount. there is actually space between the compressor and the stock mount.

[spooled240]

here's a bottom mount t3/t4 on a KA by eazye2000 on nico:
http://i85.photobucket.com/albums/k63/eazye4you/GT3076R%20Installed/P1000503.jpg

you can see the flange it looks like he just swapped a t3 on that one, apparently this worked pretty well

[codyace]

i run a 3071 t2 on a stock manifold(s13) and the compressor does not touch the motor mount. there is actually space between the compressor and the stock mount.

T2 frame isn't T3 frame

[Davidna2fi]

I would have never thought of hearing Miko's name ever mentioned on here. Shame he was so resistant to help most of the time on SR20forum. Smart guy regardless.


I dunno, he's pretty active on Sr20-forum.com and I just spoke to him on the phone last week... hmm.

[s15lover]

I say P12 because there are big differences...if I had a p11 head I would just state ve.

I was referring to the inlet compressor housing being the T04s style with the 4" inlet...I could see that posing a huge issue...but that ka setup has me believe it could be done by chopping enough out of a tubular style manifold and rewelding a t3 flange of course with dimensions taken into account...

Although a t3 bottom mount would not be optimal, it would be beneficial to those who have a t3 frame at their disposal but insufficient funds to go with a quality topmount...not referring to ebay topmounts because I would never put that shit on my car.

That ka setup is right along the lines of what I was looking for but of course in a rwd sr but again I opted against it since I found a low mileage t25 setup and I'm just going to run that for right now...especially for break in.

The twinscroll debate has already been run through plenty of times lol...we'll not even step into that. I believe there is enough noticeable gains in the powerband for it to be beneficial especially with separated gates.

Either way I've got my hands full I'm building 3 cars right now. My punkass little brother threw a rod on my mom's 08 xb which I found a free engine for from a buddy who works at a shop...then I found that the 2azfe's are notorious for stripped head bolt/stud threads (which makes me glad I only buy nissan), I'm also building a s14 sr in s13 hatch, and of course my P12 ve head on s13 det built block in 97' s14, I will be making a thread too soon about the rwd oil pump issue...while some people said mill the back of the pulley 3-5mm, I in fact found that a thin spacer much like the one gspec sells is needed and the crank pulley needs to be milled the thickness of the spacer to keep the belts in line.

anyway I would still like to see pics of an actual t3 frame turbo bottom mounted on a modified t2 to t3 tubular manifold with no machining/grinding needed...much like the ka one that was posted.

[codyace]

I dunno, he's pretty active on Sr20-forum.com and I just spoke to him on the phone last week... hmm.

This is going back 6-7 years ago before the 'dash' fiasco/florida takeover hehe

[inopsey]

T2 frame isn't T3 frame

noone is suggesting they are, im addressing the fact that the 3071wg fits on the stock manifold without having to cut the mounts. please read before responding.

[codyace]

noone is suggesting they are, im addressing the fact that the 3071wg fits on the stock manifold without having to cut the mounts. please read before responding.

Speaking of reading, you must have missed where the O/P was asking about the T3 version.

So (old news) the T2 version fits, that wasn't the question. If you're going to even attempt at trolling, make sure you're correct. No one cares about the T2 version. In fact S14db and Myself both comments on them fitting, but needing modification.


FWIW: T2 30x variant is a waste of potential HP. Terrible powercurve.com!

[GSXRJJordan]

There are a lot of things in this thread that made me lol.

Cody getting trolled mostly.

[codyace]

There are a lot of things in this thread that made me lol.

Cody getting trolled mostly.

I should just start saying 'oh wow great idea'. Anymore people just want their ego's stroked.

...sigh. Oh well haha.

[inopsey]

Speaking of reading, you must have missed where the O/P was asking about the T3 version.

So (old news) the T2 version fits, that wasn't the question. If you're going to even attempt at trolling, make sure you're correct. No one cares about the T2 version. In fact S14db and Myself both comments on them fitting, but needing modification.


FWIW: T2 30x variant is a waste of potential HP. Terrible powercurve.com!
wasnt talking to you codyace all i did was respond to s14db statement that the 3071wg fits on a stock manifold with no modification for the compressor to fit. the only reason i did this is because i searched a long time and found no answer to that same question when i bought the turbo.

btw i can buy a t3 housing and go top mount with the t2 3071 if it didnt already spool like a 2871.

[S14DB]

wasnt talking to you codyace all i did was respond to s14db statement that the 3071wg fits on a stock manifold with no modification for the compressor to fit. the only reason i did this is because i searched a long time and found no answer to that same question when i bought the turbo.I guess there is some differences in the compressor housings.

btw i can buy a t3 housing and go top mount with the t2 3071 if it didnt already spool like a 2871.

The WG turbine is 56.5mm and the T3 turbine is 60mm. Part of the reason the WG sucks. You will have some blow-by using the WG wheel in the T3 housing.

[inopsey]

The WG turbine is 56.5mm and the T3 turbine is 60mm. Part of the reason the WG sucks. You will have some blow-by using the WG wheel in the T3 housing.

atp turbo sells custom turbine housings that fit the smaller compressor wheel of the 3071wg i can even get it in a divided housing.