Update on the Turbo Q45

[sijoko]

I just wanted to give you guys an update as to the status of the Q45 turbo project. I have been working on it off and on for the last month. Progress is slow but steady.

Here are some pics:



4 inch downpipe that necks down to 3.5 inches.



Modified driver's side manifold.

Passenger side manifold in beginning stages of modification.

Garrett T-76 Turbo

[midnightsliding]

badass ill keep my eyes on this.kinda of sketchy on the CAS. might be a lil hot.

[sijoko]

...kinda of sketchy on the CAS. might be a lil hot.

Yeah, I'll have to do something for the CAS. The downpipe will be wrapped and I'll put some kind of heat shielding on all the sensitive areas.

[bullittandy]

I'm extremely impressed!

Check JC Whitney for heat wrap, etc supplies-they're likely to have a crazy obscure collection of stuff. I used a fiberglass wrap on a amp power wire than ran underneath my car and was 1/8" from the exhaust and it looked as good as new so I don't think you'll cook anything if that's used.

[radride]

Are you going single turbo or twin? If you are going twin then I think the t76 is too big but if you are going single it should work out fine. Also do you have equal runners going to your turbo (equal lengths of pipe going from the manifolds to the exaust side of the turbo)? If not that will hinder performance a bit. Also what size of wastegate are you going with? Is it going to be vented to atmosphere or plumbed back into the exhaust? How much boost are you going to run?

R.K.

[elwesso]

So what is left? Seems like just plumb the pressure side through the intercooler and back to the TB?

Looks great siju... Cant wait to see videos of this thing.

[sijoko]

So what is left? Seems like just plumb the pressure side through the intercooler and back to the TB?

Looks great siju... Cant wait to see videos of this thing.

Wes, there's still a lot more to do. The hot side piping is taking forever to build. It's my first build so there is a lot of trial and error with cutting and welding of the tubes. I figure that I have at least another month to go.

[sijoko]

Are you going single turbo or twin? If you are going twin then I think the t76 is too big but if you are going single it should work out fine. Also do you have equal runners going to your turbo (equal lengths of pipe going from the manifolds to the exaust side of the turbo)? If not that will hinder performance a bit. Also what size of wastegate are you going with? Is it going to be vented to atmosphere or plumbed back into the exhaust? How much boost are you going to run?

R.K.

The setup is going to be a single based on a large frame T-76. I'm using modified stock manifolds and stainless tubing for the pre-turbo hot side.

Boost will be limited to 6 psi for testing and then I'll take it up to 8 psi if I'm happy with the air/fuel ratios. The wastegate is a Tial 38mm unit that will be vented to the atmosphere at first. That would be easier for me, obviously. If I don't like the sound of the open wastegate, then I'll plumb it into the exhaust pipe.

[lino]

When you're done, maybe Wes can start a section similar to http://www.boostjunky.com/ and your car will be the feature car.

[elwesso]

thats what i was planning on doing with vh45de.com

[ScottJackson]

I didn't realize the body of the T76 turbo was that large. It looks a lot to me like a TV71 turbo. But then again, I'm no expert by any means and I'm more familiar with Holsets.

[sijoko]

I didn't realize the body of the T76 turbo was that large. It looks a lot to me like a TV71 turbo. But then again, I'm no expert by any means and I'm more familiar with Holsets.

The turbo is a T6 flanged T-76.

[TBrack]

more pics!

[sijoko]

more pics!

[sijoko]

Alright, here are some more pics of the Turbo Q for your viewing pleasure.

This is the pipe that will carry the exhaust from both banks to the rear of the transmission, from there the flow heads to the front of the engine bay to the turbo.

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Here's the pipe after completion.

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Here's the rest of the piping heading to the turbo.

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This is the spot where the oil drains back into the pan.

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Here are the stock manifolds after modification.

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Here are all the pipes for the pre-turbo hot side. I painted them in BBQ paint, wrapped them, painted the wrap, wrapped the wrap with aluminum foil tape and then painted everything with the high temp BBQ paint. All the pre-turbo piping is .065 stainless so it should survive with my experimental wrapping. Hopefully.

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And this is where I am at present. Still have a while to go as you can see. I still have to move the MAF over some more towards the passenger side.

[elwesso]

Siju I envy your craftsmanship, those parts are better than a lot of aftermarket parts I see.

Are the stock manifolds basically the stock manifolds except you tookoff the precat and put a new flange on it? Its hard to tell, did you actually put in new pipes from the flange into the collector? Those things look really nice!

Basically to me it looks like you have the manifolds in a very stock position and then you juts have a hot pipe that goes back up to the turbo, and then another down pipe from the hot side of the turbo. Did you decide to move the turbo to the drivers side? I bet due to clearance?

[Jeff Williams]

Prety cool that you can keep the front strut tower brace on the car!

Good work! I know that all that piping is a real PITA to get perfect. Jesse James makes it look easy on TV, but it is a real pain to get to fit.

I think a twin setup would be easier to pipe.

[sijoko]

Siju I envy your craftsmanship, those parts are better than a lot of aftermarket parts I see.

Wes, thanks for the compliment. The welds were ground down which makes a big difference in appearance.

Are the stock manifolds basically the stock manifolds except you tookoff the precat and put a new flange on it? Its hard to tell, did you actually put in new pipes from the flange into the collector? Those things look really nice!

Yes, the pre-cats were removed from the stock manifolds and then tubing was added so I could weld on a flange. If you look at the pic all the way on top you can see the passenger side in the beginning stage of modification.

Basically to me it looks like you have the manifolds in a very stock position and then you juts have a hot pipe that goes back up to the turbo, and then another down pipe from the hot side of the turbo. Did you decide to move the turbo to the drivers side? I bet due to clearance?

My design doesn't change the position of the manifolds so the EGR tube and O2 sensors stay in place. The driver's side crosses over to the pass side and then both sides flow together in one pipe that goes behind the trans and then forward to the turbo. I was always going to place the turbo in the driver's side. It's the only logical place for a decent sized turbo. If I can cram a large frame T6 flanged turbo in the engine bay, then anyone can turbo their Q since most turbos are going to be smaller than mine. But I'm an extreme kind of person and I wanted a big turbo. I just hope that it spools up sometime in this century.

[elwesso]

I thoguht I remembered seeing that massive turbo on the passenger side, which is why you removed the battery?

Whatever the case is, I think I understand whats going on. It seems like theres a lot of unnecessary plumbing, but doing it this way is a lot easier than modifying manifolds. Pretty cool that the stock exhaust manifolds stayed pretty much the same.. I would just think itd be easier to make one manifold go right into the turbo and the other manifold have an Xover that dumps into the one manifold, but what do I know about turbo setups anyway...?

BTW you might post a quick little thing in the VH fourm, i know a lot of the VH guys dont come to the Q forum. I looked at some of your other pics and info and it looks pretty cool, very well thought out.... When do you estimate you'll start getting deep into boost? Certainly does not seem like a scenario where youll be seeing a few lbs of boost around 2000 RPM.

[sijoko]

Prety cool that you can keep the front strut tower brace on the car!

It would be a shame to get rid of your strut brace. I like it better than the Stillen piece I had before. The only thing I did was adapt the Stillen end pieces to work with your brace.

Good work! I know that all that piping is a real PITA to get perfect. Jesse James makes it look easy on TV, but it is a real pain to get to fit.

The guys on TV have the benefit of unseen hands that do the menial work. Plus they have a nice shop with whole bunch of cool equipment. I'm doing everything in my driveway and most of my "cool equipment" comes from Harbor Freight.

I think a twin setup would be easier to pipe.

I don't know how twins will fit in the engine bay without getting rid of the a/c. Now, a rear mount system with twins is very do-able.

[sijoko]

I thoguht I remembered seeing that massive turbo on the passenger side, which is why you removed the battery?

Whatever the case is, I think I understand whats going on. It seems like theres a lot of unnecessary plumbing, but doing it this way is a lot easier than modifying manifolds. Pretty cool that the stock exhaust manifolds stayed pretty much the same.. I would just think itd be easier to make one manifold go right into the turbo and the other manifold have an Xover that dumps into the one manifold, but what do I know about turbo setups anyway...?

BTW you might post a quick little thing in the VH fourm, i know a lot of the VH guys dont come to the Q forum. I looked at some of your other pics and info and it looks pretty cool, very well thought out.... When do you estimate you'll start getting deep into boost? Certainly does not seem like a scenario where youll be seeing a few lbs of boost around 2000 RPM.

The main reason for relocating the battery was to move the oil filter to somewhere more accessible and also to allow for a spot for the intercooler piping to enter the engine bay.

You're right about the extra plumbing that is why I wrapped everything and used stainless tubing. My original plan was to build a custom manifold for the driver's side and hang the turbo of it. But my turbo is huge and I wasn't comfortable with that much weight hanging of the end of the manifold. So I modified my plans. If I used a smaller turbo, it would be different.

As far as boost threshold (the point where the turbo begins to make boost), I am expecting it to be around 3000 rpms. I built this system to make good power in the mid to high rpm range. Under full throttle acceleration, the rpms never drop below 4000 as the trans shifts. So as long as the turbo makes good power at 4000 and above, I am good to go. Also, remember that I have a high stall converter so the engine will quickly come up on 3k rpm.

[elwesso]

So the inevitable question remains.. I know this is the LAST thing you plan on, but what is the feasibility of having all this junk remade?

[sijoko]

To make another kit wouldn't be too hard once I'm done with this. I might experiment on my other Q to see if I can make a kit that is easier to build. But first I need to get this one done and tuned properly. I also need to get ready for a rebuild soon as this car has over 250k miles on it. I have another engine that I would like to freshen up and drop in.

[sijoko]

Some more progress.

[qsiguy]

Intercooler looks awesome! Fits like a glove. What are the dimensions and make/model of it?

[maxnix]

I am lost on the last picture. Are you laying the ATF cooler horizontally?

Cold air box coming? Too bad there is not room for 2 OEM filter boxes.

[bullittandy]

Looks great, very ingenious. I'm most interested in the tuning aspect because if you can get it tuned correctly then a rear mount turbo would be extremely easy to engineer as compared to an engine bay mount. I've seen two installs of rear mount turbos, one on a Mustang and the other on a Corvette. Both appeared to be very staight forward.

How will it be tuned? Will it be on a dyno at any point?

Good work!

Why 2 filter boxes? Even better, why would you bother with an OEM filter and airbox?

[sijoko]

Intercooler looks awesome! Fits like a glove. What are the dimensions and make/model of it?

Shane, what about incorporating an intercooler into your rear mount setup? The one I am using is decent sized with a core of 26 x 10.5 x 3.5 and an overall length of 36 inches. I bought it from a company called Treadstone. Wasn't that the name of the CIA black ops in the Bourne Identity? LOL.
Modified by sijoko at 5:42 PM 5/29/2007

[sijoko]

I am lost on the last picture. Are you laying the ATF cooler horizontally?

Cold air box coming? Too bad there is not room for 2 OEM filter boxes.

That is an oil cooler mounted that way because I have no other place to put it. As far as a cold air box, I might make some kind of heat shield around the filter. It is partially out of the engine bay as is. I'm not following your line of thought about the OEM filter boxes.

[sijoko]

Looks great, very ingenious. I'm most interested in the tuning aspect because if you can get it tuned correctly then a rear mount turbo would be extremely easy to engineer as compared to an engine bay mount. I've seen two installs of rear mount turbos, one on a Mustang and the other on a Corvette. Both appeared to be very staight forward.

How will it be tuned? Will it be on a dyno at any point?

Good work!

Why 2 filter boxes? Even better, why would you bother with an OEM filter and airbox?

Additional fuel will be handled by a combination of a Boost ECU programmed by Robert Bowen and also a BEGI FMU. I will check air/fuel ratios using a NGK Powerdex WideBand O2 meter. I probably won't ever take it to a dyno. For me, street tuning should be sufficient. As far as power output, it should be in the low to mid 400 hp level.

A rear-mount will be very easy compared to my setup. The biggest concern is space for a decent sized turbo. QSIGUY is working on one, maybe he can shed some light on his rear mount project.