B.A.D. Q45 SuperCharged Setup

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DAEDALUS
Posts: 5421
Joined: Mon Jul 22, 2002 8:50 pm
Car: 1990 Infiniti Q45

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AZhitman wrote:Good luch finding a machine shop that can meet OEM VH45DE specs. I'd bet $$$ there are none that can exceed them.


Anything can be had for enough money...it's just that costs accelerate quickly as tolerances decrease linearly. I assume racing engines are built to tighter tolerances. For a straight rebuild, a lot of the difficulty is in measuring what you have, since factory parts are available (they do the hard stuff). Think bearings for instance. The fact that 3 conrod bearing sizes are available from the factory, each .0001" apart from one another, doesn't do you any good if your measurement accuracy is .0002". .0001" is hard to fathom in the real world....about 1/35th paper thickness. In most manufacturing fields, measuring tighter than .001" feels kind of like measuring cost in fractions of a cent.

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AZhitman
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Posts: 54542
Joined: Mon Apr 29, 2002 2:04 am
Car: 58 L210, 63 Bluebird RHD, 64 NL320, 65 SPL310, 66 411 RHD, 67 WRL411, 68 510 SR20, 75 280Z RB25, 77 620 SR20, 79 B310, 90 Z32, 91 GTi-R, 92 Silvia Qs, 98 S14, 23 Z.
Location: Surprise, Arizona
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1992Q45A wrote:I think the G50 could handle the power. I bet what made it undriveable, was the stock transmission, and other factors.


He says it was the suspension. Unless you launched smoothly, the arse-end would step sideways and then enter the "death sway", back and forth until it either:

a) caught tractionb) you backed off like a pussc) spun out

I like those kinds of choices. For what it's worth, the stock transmission held up to quite a bit of track time and lots of daily driving (6 months).

FYI - We need to research the feasibility of some "extensions" for the injector wires (like 3-6" each). This may be a simple as some ghetto splicing and heat shrink, unless someone has a better idea.
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1992Q45A
Posts: 1183
Joined: Mon May 31, 2004 4:59 am

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the death sway.. nice.

The best is psycho steer.. it happened on old caddys.. I forget where I saw the pic.. it was like oversteer, understeer, and then PSYCHO steer..

I dunno how you could expect it to do anything but the death sway.. 380RWHP is insane... The XJR with 300RWHP is fericous off the line, in 1st gear.

May be one case, where you actually want the 2nd gear start. Again, the XJR has this, and it makes it way more driveable around town and such.
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MiniMan
Posts: 869
Joined: Tue Dec 16, 2003 6:40 am

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Traction blues can always be cured with a nice FAT set of Goodyear Eagle F1 GS-D3s ;) . Something to fit say an 18x9.5" rim should do...

Corey
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MiniMan
Posts: 869
Joined: Tue Dec 16, 2003 6:40 am

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Greg, I take it the BAD Q was run on stock rims/stock tire widths, no?

Corey
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AZhitman
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Posts: 54542
Joined: Mon Apr 29, 2002 2:04 am
Car: 58 L210, 63 Bluebird RHD, 64 NL320, 65 SPL310, 66 411 RHD, 67 WRL411, 68 510 SR20, 75 280Z RB25, 77 620 SR20, 79 B310, 90 Z32, 91 GTi-R, 92 Silvia Qs, 98 S14, 23 Z.
Location: Surprise, Arizona
Contact:
Contact AZhitman

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Stock rims, wider tires, very sticky...
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1992Q45A
Posts: 1183
Joined: Mon May 31, 2004 4:59 am

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needs 18 or 19s for sure. 380rwhp on stock wheels.. further insanity
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rsiwicki
Posts: 1984
Joined: Wed Feb 04, 2004 3:31 pm
Car: 95 Q45T

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does anybody know who this guy is on ebay that SC his Q45 and is selling his heads off his 91 Q45???

cylinder heads of a 1991 q45 engine. excellent condition complete with cams and valve covers. taken off my engine when i did a head modification adding a supercharger. aprox 120000 miles on these heads. car owned by ase certified mechanic. well maintained and serviced. please email me with any questions

http://cgi.ebay.com/ebaymotors...photo
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1992Q45A
Posts: 1183
Joined: Mon May 31, 2004 4:59 am

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whoa. Nice pickup RSI. I looked at that but never noticed the supercharged wording.
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AZhitman
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Posts: 54542
Joined: Mon Apr 29, 2002 2:04 am
Car: 58 L210, 63 Bluebird RHD, 64 NL320, 65 SPL310, 66 411 RHD, 67 WRL411, 68 510 SR20, 75 280Z RB25, 77 620 SR20, 79 B310, 90 Z32, 91 GTi-R, 92 Silvia Qs, 98 S14, 23 Z.
Location: Surprise, Arizona
Contact:
Contact AZhitman

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Wonder why he'd take off the heads and not replace them? It's not like you can run down to NAPA and buy modified heads and cams for a VH45DE.... Hmmmmm..... Strange.
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rsiwicki
Posts: 1984
Joined: Wed Feb 04, 2004 3:31 pm
Car: 95 Q45T

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I emailed the seller to figure out who this guy is and get the details on his SC setup.
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rsiwicki
Posts: 1984
Joined: Wed Feb 04, 2004 3:31 pm
Car: 95 Q45T

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Wow!!! I thought that one of you all might know who this guy is, but it looks like we have another SC Q45 that we have found...now I hope the guy is cool and gives us the scoop on his SC setup
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MiniMan
Posts: 869
Joined: Tue Dec 16, 2003 6:40 am

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Rob, I sent him an e-mail too. Post up here when he gets back to you! Awesome find.

Corey
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1992Q45A
Posts: 1183
Joined: Mon May 31, 2004 4:59 am

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Got Boost?
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rsiwicki
Posts: 1984
Joined: Wed Feb 04, 2004 3:31 pm
Car: 95 Q45T

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Here is Troy's response on his Q45 mod....I sent him a link to our website asking him to check us out to help spread the wealth of knowledge on modding the Q....I don't know if he is referring to the SC or the Turbo....to me is sounds like he "turbo" the Q

"i used a supercharger off of a nissan 300zx installed with some seriously intense fabricating of the intake and exaust system ... as for relaibility i do not know as of yet as we are waiting for some finialized parts ... im expecting a bhp rating os somewhere in the mid to upper 400's. i would not attempt this mod again or suggest it to anyone alive! but the car has started and ran responsive during the inital test, which also yeilded the need for a stronger bracket system to be made which is what im waiting on now .. thanx for your intrest "
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AZhitman
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Posts: 54542
Joined: Mon Apr 29, 2002 2:04 am
Car: 58 L210, 63 Bluebird RHD, 64 NL320, 65 SPL310, 66 411 RHD, 67 WRL411, 68 510 SR20, 75 280Z RB25, 77 620 SR20, 79 B310, 90 Z32, 91 GTi-R, 92 Silvia Qs, 98 S14, 23 Z.
Location: Surprise, Arizona
Contact:
Contact AZhitman

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I still don't understand the removal of the heads....

Sounds like a turbo setup to me as well...
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MiniMan
Posts: 869
Joined: Tue Dec 16, 2003 6:40 am

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It definitely is a turbo setup... but a turbo is a a type of supercharger.

In any case, the increased heat can't be good for his engine if it's going to be used as a daily driver. Very interesting project nonetheless. Might this be the first turbocharged North American Q45?

He says he will be joining NICO shortly and detailing his project further... I can't wait to hear some more about it!

Corey
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