Twin Turbo-ing Q45?

[elwesso]

It obviously can be done... It has been done a few times to a VH45... has been done once htat I know of in the Q.

[RAQ45t]

Why? I've come from several years with BMWs,and a few have put large or twins on 540V8's even M5's.But where do you drive it? There's a twin turbo E34 540 BMW here in S.Fla. putting out close to 500hp.Where do you get to use it?Everything here is flat and crowded. Never figured that one out.

[Flagship-Q]

I was surfing a few of the 300zx twin turbo sites and it sounded like it kinda made some sense to turbo the VH45 (nissan parts fitting on infiniti, etc.). Tried to search the topic but the SEARCH button is down apparantly. It's pretty easy to come across someone selling a twin turbo setup for the Z32 or parting one out. I already know about the supercharger project but am just throwing this out there. Anyone know about it? Thanks alot.

[elwesso]

indiana is a little different...

Really flat and stretches where you dont see many people... hell there a lot of roads that dont even have lines.

no lines= no speed limit IMO

[Ozzie]

Australia.... I could use it just about everywhere!

[Rex]

I was surfing a few of the 300zx twin turbo sites and it sounded like it kinda made some sense to turbo the VH45 (nissan parts fitting on infiniti, etc.). Tried to search the topic but the SEARCH button is down apparantly. It's pretty easy to come across someone selling a twin turbo setup for the Z32 or parting one out. I already know about the supercharger project but am just throwing this out there. Anyone know about it? Thanks alot.

Not sure if anyone posted this yet.

zerothread?id=95199

[elwesso]

i watch that video at least once a week

[Rex]

When I win the lottery, I'm gonna find a 98 S14 for him to do that to for me .

[Flagship-Q]

It's obviously very possible, so my question: is this a more cost concious, feasible route than the supercharger? What would be involved? Custom headers, plumbing, etc? I wonder if Robert would be able to modify the ECU (if necessary) for it.

[elwesso]

1. It's obviously very possible, so my question: 2. is this a more cost concious, feasible route than the supercharger? 3. What would be involved? Custom headers, plumbing, etc? 4. I wonder if Robert would be able to modify the ECU (if necessary) for it.

1. Swear2. No the supercharger will be cheaper, youll have to remove the engine and custom make everything.. The SC is a bolt on, take plenum off, install SC.. no way you could get it done cheaper than $3000 unless you did a bulk (all of it) of the work yourself.. Even then itd be close, IMO3. Custom manifolds, plumbing, intercooler (theres not as much room up there as you think), oil lines, and so forht4. Yes boost maps can be done very easily....

[si]

When I win the lottery, I'm gonna find a 98 S14 for him to do that to for me .

Speaking of s14's, there is apparently a TT vh45 s14 being built here in Brisbane. I've been trying to find out more about it but no such luck yet.

[BlackBirdVQ]

Having built a few turbo kits in the past for my SR powered cars, and Hondas... I don't think I want to TT the VH in my Q.

I have measured out the engine bay and there is VERY little room for pluming the turbos to the intercoolers. Suction side wouldn't be much of an issue, but runing the intercooler pipe from the pass side turbo would be VERY hard. There is almost no room on that side of the engine to even remove the exhaust manifold, let alone run charge pipes.

I'm not saying its impossible, but I do not wish to spend hundreds of hours trying to fabricate something like that when the supercharger option is avalible and will net me the power I would be quite contempt with for a while- 500HP.

Here is the last custom project I've done on my 93 G20. Its all home brewed Welding is not a issue for me.

[maxnix]

Nice job!

I doubt 500hp is available without an intercooler, like the Cadillac or Porsche ones integral to their SC. Not to mention pistons, oil cooling, cooling passages in the engines, the external cooling system, everything would have to be re-engineered to have something reliable for the street. And the fuel economy would be non-existent.

I think John Dixon is on to something with his non-boosted build.

[BlackBirdVQ]

Intercooling it wouldn't be much of a problem, you could run something similar to the ones that Stillen sells for their VQ35DE applications.

I also do not think that 500HP would be much of a stress for a engine the size of our Qs. I have put down over 500WHP on my SRs before and that was on stock DET internals. Seeing how stout the VH is internally with my own eyes, I doubt that the engine can't hold 500WHP. I am not positive that the VH has oil squirters under the pistons, but it might- I have not looked. I belive you could coax 400HP out of the VH without any forced induction or NOS, but that route hasn't been done just yet. Problem with 500WHP G20s/Sentras is the FWD transmission can't hold all that power unless you go with PAR gear sets, and the other problem is- traction is impossible to attain on the street when putting down that much power. When I ran a Viper in my G20 I had no tracion in 4th gear for a while, and then finally in 5th gear I was able to whopp on the snake with no drama

[RobertsnewQ]

Man if home-built turbos were legal in CA your G20 is exactly what I would build, although I think I would start with a P11.

Nothing like a turbo car for easy power.

Now, as for the VH45, I think you are definitly right that there is NO room for a pair of turbos in there. Maybe if you hack the inner fenders out or something. Of course 300zxTTs squeeze them in similar area.

Although, if you read the Z32 shop manual, under "TUrbo replacement" it starts with "Remove the engine and transmission assembly..."

[chinaonnitrous]

For the size of the engine bay, theres not really room to do much of any kind of piping, without it banging into miscallanious items.

S/C seems like the Best bang for the buck mod.

[QShip]

I thought Slim had a good location for the TT on the VH45.

[elwesso]

just take in mind that Slim's setup in the Z32 engine bay has noticeably less room than in the Q engine bay.

[one ton garage]

The VH45DE is a rather large engine, esp compared to, say, a chevy 350... and it's fit into a rather small engine bay, compared to, say, a caprice impala. And the VH's accessories and associated lines are convoluted and run along the sides of the engine, further eating up more engine bay room, and cutting into space for you to run turbo plumbing. Front crossmember and motor mount design also eliminates the possibility of routing piping through them along the frame rails (like on most new mustang turbo kits). If you want to run under the xmember, expect to not lower the car... might even have to raise it just to be safe depending on road conditions around your area... and that's just doo doo. Remove some pwr accessories (like a/c for single turbo, or a/c and pwr steering for twin turbo), but then you're left with not much of a luxury car anymore... not worth the compromise imo.

[maxnix]

Remove some pwr accessories (like a/c for single turbo, or a/c and pwr steering for twin turbo), but then you're left with not much of a luxury car anymore... not worth the compromise imo.

Yeah, I think unless you want glowing floorboards, finding room for turbos and heat shielding them is just about impossible.

And lets not go back to the remote or single turbo idea, please. There is already a thread.

[elwesso]

When slim looked at my Q at NOPI, he seemed to think we could twin turbo it like his without removing AC or any of the luxury comforts.

[QShip]

After I add boost to the Titan, the Q will go to Slim.

[elwesso]

After I add boost to the Titan, the Q will go to Slim.

what about the Rootes supercharger???

[Q_SHIP]

[elwesso]

its a shame because that could not be implimented in a Q45, in that fashion that is.

[Q_SHIP]

its a shame because that could not be implimented in a Q45, in that fashion that is.

I know, but it's still a cool picture.

[QShip]

I don't know Wes. Maybe I need to talk with in depth about the s/c. I've talked with Slim about his setup and it sounds pretty good.

[elwesso]

your welcome to call me at 765-621-8336, ill tell you about the SC, and you can decide for yourself.

I am not particularly opposed/for either, so i can just tell you the facts... Also send me an email, and I will foreward you an email I got a while back ago that you would like.

[Ezekial]

Intercooling it wouldn't be much of a problem, you could run something similar to the ones that Stillen sells for their VQ35DE applications.

I also do not think that 500HP would be much of a stress for a engine the size of our Qs. I have put down over 500WHP on my SRs before and that was on stock DET internals. Seeing how stout the VH is internally with my own eyes, I doubt that the engine can't hold 500WHP. I am not positive that the VH has oil squirters under the pistons, but it might- I have not looked. I belive you could coax 400HP out of the VH without any forced induction or NOS, but that route hasn't been done just yet. Problem with 500WHP G20s/Sentras is the FWD transmission can't hold all that power unless you go with PAR gear sets, and the other problem is- traction is impossible to attain on the street when putting down that much power. When I ran a Viper in my G20 I had no tracion in 4th gear for a while, and then finally in 5th gear I was able to whopp on the snake with no drama

I believe there really is only 2 problems to overcome when trying to make respectable hp from a boosted VH45! Compression and Oil starvation!

My engine suffered from oil starvation. Considering the state of my bearings ... i believe a woodriff key for the oil pump crank sprocket will fix this!

BTW The VH45 does have piston squirters. They are on the side of the conrods ...

How much are you paying for the PAR gearsets? I'm sure i could get them cheaper for you!

[hazw8st]

Compounded or sequential turbos is the way to go....