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markrolston@mac.com

Progress on my insane VQ35HR 240Z project

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well theres a bottomless pocket ;)

 

 

I'm blown away by this project.. and extremely jealous.

 

Great work sir

 

BTW - what seat are you using?

 

yes, I will admit to spending a bit on these projects. Most folks in my position go out and buy a new car. I chose to build old cars.

 

As for the seats, no idea yet. I may transfer the Sparco DTMs I have in the silver car into the new car. They are amazing seats. This decision is likely more than a year away. I may have enough money to do this project but only if I spread the effort out over a few years. I'm just now over 1 year into it so far and have at least another year to go.

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That's looking great Mark, You'll have to let me know how that 1 piece fits over the HR motor. on my HR project, it's going to be a really tight fit. so much so I may end up shaving some of the ribs off the plenum, much less ditching the engine cover. I guess you don't have to worry about the steering crossmember though.

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That's looking great Mark, You'll have to let me know how that 1 piece fits over the HR motor. on my HR project, it's going to be a really tight fit. so much so I may end up shaving some of the ribs off the plenum, much less ditching the engine cover. I guess you don't have to worry about the steering crossmember though.

 

I'm hoping to use the Jensen ITB setup with two custom intake plenums so will be able to control height a bit. But even then it's a tight fit. I will have pics of the clearance in a few days.

 

mark

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I've been a poster for a few years in the RB section of this site. During that time I built and have been maintaining (breaking and fixing!) my RB26 240Z.

 

http://web.mac.com/markrolston/NewSite/Z-Blog/Z-Blog.html

 

But since that car is more or less complete, a few months ago I started a new project to build a car from scratch. It is based on a 240Z body but from there just about everything is custom.

 

This time I'm using a VQ35HR instead of the RB. It'll be interesting to find out which is better when it's all done. The RB is a monster motor but I'm hoping for less weight and more torque with my plan for a built, twin turbo VQ.

 

Anyway, I started a website to track all the progress. I'd love any feedback on the plans. It's been a slow start but exciting to build something so unique.

 

http://web.mac.com/markrolston/NewSite/New_Z_Blog/New_Z_Blog.html

 

best wishes,

mark

 

When are you going to let me come check out the shop and rMe a ride in the Z? Did Boost Logic help tune the car first car? They built my Lexus.

 

Tad

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again, looks pretty good. I'm curious about the aftermarket intake plenums you had mentioned. how much clearance do you think you'll gain with them. Have you selected a radiator to use for it yet?

 

I might have to make the trip to that austin Zcon just to see this beast. I need to get a move on on my VQ35HR swap, but I've been letting my life get in the way.

 

Phar

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again, looks pretty good. I'm curious about the aftermarket intake plenums you had mentioned. how much clearance do you think you'll gain with them. Have you selected a radiator to use for it yet?

 

I might have to make the trip to that austin Zcon just to see this beast. I need to get a move on on my VQ35HR swap, but I've been letting my life get in the way.

 

Phar

 

I haven't chosen a radiator. That'll be way towards the end. I'm going to use Jenvey ITBs and make my own plenums to cover the horns. The key to clearance is to use curved horns rather than the straight horns shown in the ITB pics. Then I can make the plenum as big or tight as needed.

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Have you checked out that Monzter Turbo Plenum thread, http://forums.hybridz.org/showthread.php?t=127863

 

It's pretty cool, though I'm not sure how you could adapt a similar design for ITB, or for our Dual throttle bodies.

 

I guess I am I reading you correctly in that you're not going to use the stock throttle bodies and thus do away with the Drive By Wire, and need to research the changes in the ECU etc to make them work. Would those work with the Haltec system then?

 

I was thinking curved intake tubes similar to the Kenetix 03-06 intake, but much shorter with 3 oval shaped tubes feeding together to a round intake on each side that my stock TB's would mount to. Oval shape should keep a good flow, but still be flat enough that the clearance should work with the S30 hood. I was playing with the ideal of building something like Monzter's plenum attached to matched length oval runners. Flow may be an issue since it would cut down on the volume from stock. not to mention the added turns leading to the heads. I can draw some pictures if you're interested.

 

Phar

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Have you checked out that Monzter Turbo Plenum thread, http://forums.hybridz.org/showthread.php?t=127863

 

It's pretty cool, though I'm not sure how you could adapt a similar design for ITB, or for our Dual throttle bodies.

 

I guess I am I reading you correctly in that you're not going to use the stock throttle bodies and thus do away with the Drive By Wire, and need to research the changes in the ECU etc to make them work. Would those work with the Haltec system then?

 

I was thinking curved intake tubes similar to the Kenetix 03-06 intake, but much shorter with 3 oval shaped tubes feeding together to a round intake on each side that my stock TB's would mount to. Oval shape should keep a good flow, but still be flat enough that the clearance should work with the S30 hood. I was playing with the ideal of building something like Monzter's plenum attached to matched length oval runners. Flow may be an issue since it would cut down on the volume from stock. not to mention the added turns leading to the heads. I can draw some pictures if you're interested.

 

Phar

 

thanks. nice parts but I don't think distribution is much of a problem under pressure from a pair of turbos. With the engine draw from a normally aspirated setup it may be but as long as there aren't constrictions I'm going to be more concerned about volume than perfect distribution.

 

And yes, oval shaped, curved horns are what I'm thinking. A short curved pipe between the head and the ITB, then a curved horn will allow for plenty of freedom to position the plenum.

 

this is what I'm imagining (but better :wink:

 

3115846049_785472fe1e_o.jpg

3116673036_fb0dcb9fb9.jpg

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Nice! Yeah I didn't know you were going the twin turbo route. That's going to be amazing. Very impressive. I can't wait to see what you come up with. I need to get an aluminum welding setup so I can build some manifolds. I liked Monzter's ideas in his turbo plenum. but you're right, under pressure, now much difference will the flow make in terms of power anyway. I'm thinking Balance might be the bigger issue. That's neither here nor there tho until you get to that point.

 

Keep up the build and putting up these sexy pictures. :D

 

Phar

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