Jump to content


Photo
* * * * * 7 votes

Progress on my insane VQ35HR 240Z project


  • Please log in to reply
475 replies to this topic

#461 texis30O

texis30O

    Member

  • Donating Members
  • PipPipPipPipPipPip
  • 1275 posts
  • LocationTexas

Posted 08 March 2016 - 08:28 AM

Mark, I am in Austin working this week.  Is there any chance I could see your build in person? 


1970 240 Z #806, LS2 with a Maggie, t56, Fritz 8.8 swap, Coilovers, Cage, Flares, Wilwood.....

IG: sean70240z

'13 Tundra, CrewMax, .....I have issues...

"Driving this car on the street is like kissing a porn star on the cheek." -RebekahsZ


#462 ihiryu

ihiryu

    Always Here

  • Members
  • PipPipPipPip
  • 313 posts
  • LocationKilleen, TX

Posted 08 March 2016 - 08:48 AM

I wanna come see it too.....


Contact me for cheap prices on speedhut gauges, many, many, other things

http://tinyurl.com/SpeedHut-Group-Buy

If we've done business and you were satisfied, a simple "Like" on our facebook page would be all the "thanks" I'd need!

https://www.facebook.com/KRMotorsports


#463 EF Ian

EF Ian

    Junior Member

  • Members
  • PipPipPipPip
  • 473 posts
  • LocationPortrush - Northern Ireland

Posted 20 March 2016 - 10:43 AM

 

I appreciate the advice from everyone to use a custom ECU. I have a Motec M6 in my RB26 Z (http://www.rolston.m...log/Z-Blog.html) and while it's arguably one of the best aftermarket ECU's, even the best programming can't match what the factory ECU can do for basic drivability. Any custom map likely suffers from cold-start, decel, part-throttle, and other tune weaknesses. I'm determined to start with the factory ECU along with the UpRev programming to see if I can have my cake and eat it too- meaning to have a nice drivable map along with the high power setup that I've built. 

While that can be true, all it takes is time to get the aftermarket ECU's performing like a stock in terms of driveability, with the time and money you've spent on this surely a bit more on tuning is no big deal. Map it well on the dyno and then spend  couple of weekends tweaking the cold start, drive-ability and part throttle settings, make sure the conditions are different on each weekend.

 

I feel the drive-ability on my RB26 with lnik ECU is very good, tweaked the cold start a few times and now its perfect.

 

 

 

 

 

The schedule target is now to have the car finished and running for the Nismo Fiesta in San Antonio at the end of April. It may not be painted but I expect it will be finished otherwise. Then we can do a few months of test/tune at Harris Hill to figure out what spring rates, shock settings, etc. work best. If you recall, the entire frame and suspension of this thing is custom and therefore we have no real idea of what will work best. at it's current weight of less than 2000lbs it should be quick in any case.

Will be great to see it running, good luck, make sure to keep us up to date.



#464 markrolston@mac.com

markrolston@mac.com

    Member

  • Members
  • PipPipPipPip
  • 284 posts
  • LocationAustin, Texas

Posted 21 March 2016 - 06:07 PM

It is nearly impossible in my experience to get a custom ECU programmed anywhere near a factory ECU in terms of drivability. They literally spend 1000s of hours on the tuning map. It might be technically possible to approximate it but it would take a monumental effort. In any case, it's tuned now and running great. with only spring pressure it does 430whp. We'll tune it soon with boost control for ~200+ more.


Mark,
RB26 Powered 240Z & Turbo VQ 240Z build in progress
http://www.rolston.m...Site/Z-car.html

#465 ihiryu

ihiryu

    Always Here

  • Members
  • PipPipPipPip
  • 313 posts
  • LocationKilleen, TX

Posted 22 March 2016 - 07:44 AM

Truthfully, I think my R32 drives like stock with the EMU in it.  A lot of people who have driven/ridden in it don't believe it's on standalone.  However, I do have roughly 20 hours or so on tuning the stock turbo and injectors to get it just right.  I get much better gas mileage than stock as well too.  I think though, that it's also because it's an old car running an 8 bit ECU, and suddenly went up to three decades of technology lol.

 

So.....about that invite to see the car?  :)


Contact me for cheap prices on speedhut gauges, many, many, other things

http://tinyurl.com/SpeedHut-Group-Buy

If we've done business and you were satisfied, a simple "Like" on our facebook page would be all the "thanks" I'd need!

https://www.facebook.com/KRMotorsports


#466 markrolston@mac.com

markrolston@mac.com

    Member

  • Members
  • PipPipPipPip
  • 284 posts
  • LocationAustin, Texas

Posted 07 April 2016 - 01:36 PM

small update. We're down to fit and finish. I never like the way the center console fit up against the dashboard. So we are reshaping it carefully to fit better. Then both will be surfaced in CF.

 

26204407762_dc65eec14d_b.jpg

 

25694097103_9dc46b0316_b.jpg

 

26023970500_2a215fa371_b.jpg


Mark,
RB26 Powered 240Z & Turbo VQ 240Z build in progress
http://www.rolston.m...Site/Z-car.html

#467 Pharaohabq

Pharaohabq

    Member

  • Members
  • PipPipPipPipPipPip
  • 1926 posts
  • LocationAlbuquerque, NM

Posted 06 May 2016 - 08:46 PM

FIt n Finish is awesome... I almost had to move to Austin, your car was one of the draws, fortunately I got a job here, so I'll just have to see it when I make it out sometime. It's awesome to see you're so close on it.

Phar

#468 markrolston@mac.com

markrolston@mac.com

    Member

  • Members
  • PipPipPipPip
  • 284 posts
  • LocationAustin, Texas

Posted 14 August 2016 - 08:49 AM

still working on carbon parts and fit-n-finish. It's slow going. Here's a quick shot of how the rear diffuser neatly covers the rear suspension underneath.

 

We hope to do track testing in September. I want to get this thing done this year.

 

28947713506_36c205465e_b.jpg


Mark,
RB26 Powered 240Z & Turbo VQ 240Z build in progress
http://www.rolston.m...Site/Z-car.html

#469 EF Ian

EF Ian

    Junior Member

  • Members
  • PipPipPipPip
  • 473 posts
  • LocationPortrush - Northern Ireland

Posted 17 August 2016 - 05:44 AM

Will be great to see this thing on track, good luck, take some videos for us.



#470 markrolston@mac.com

markrolston@mac.com

    Member

  • Members
  • PipPipPipPip
  • 284 posts
  • LocationAustin, Texas

Posted 28 October 2016 - 04:30 PM

I will be doing the first track shakedown of the car this thursday (Nov 3) at Harris Hill in the AM. Also, dashboard nearly finished. looks great. maybe too shiny.

 

29997153184_029ba5db8d_b.jpg


Mark,
RB26 Powered 240Z & Turbo VQ 240Z build in progress
http://www.rolston.m...Site/Z-car.html

#471 ihiryu

ihiryu

    Always Here

  • Members
  • PipPipPipPip
  • 313 posts
  • LocationKilleen, TX

Posted 26 November 2016 - 09:28 AM

ARRRRGH I CAN'T BELIEVE I MISSED THSI


Contact me for cheap prices on speedhut gauges, many, many, other things

http://tinyurl.com/SpeedHut-Group-Buy

If we've done business and you were satisfied, a simple "Like" on our facebook page would be all the "thanks" I'd need!

https://www.facebook.com/KRMotorsports


#472 jpndave

jpndave

    Always Here

  • Donating Members
  • PipPipPipPip
  • 129 posts
  • LocationHyde Park, UT

Posted 26 November 2016 - 07:56 PM

I will be doing the first track shakedown of the car this thursday (Nov 3) at Harris Hill in the AM. Also, dashboard nearly finished. looks great. maybe too shiny.

 

29997153184_029ba5db8d_b.jpg

 

 

Very nicely done!


-73 240Z owned for 30yrs(my high school car). Dragged the old girl out from storage for a full makeover, Voodoo engine/T56 Magnum transmission/"Super 8.8", A-arm Suspension, Brakes, etc. http://forums.hybrid...-touring-build/

-2007 Jeep JK Unlimited "Bumblebee", LS3 (6.8L stroked, ported, VVT cammed)/6L80E/242AMG http://www.rme4x4.co...3-quot-GM-build

#473 seb280z

seb280z

    Junior Member

  • Members
  • Pip
  • 19 posts
  • LocationHelsingborg SWEDEN

Posted A week ago

Did you get to the track?

I would love to see some Pictures of if in the current state, the work and detail of this car is awesome and you are a inspiration and keep me motivated for continuing building my Datsun..



#474 markrolston@mac.com

markrolston@mac.com

    Member

  • Members
  • PipPipPipPip
  • 284 posts
  • LocationAustin, Texas

Posted 6 days ago

Did you get to the track?

I would love to see some Pictures of if in the current state, the work and detail of this car is awesome and you are a inspiration and keep me motivated for continuing building my Datsun..

I did. I apologize for not posting but we were so caught up in testing that I didn't take many photos and completely forgot to get video. The car is insane to drive. The throttle is too sensitive and it'll spin it's wheels at the slightest tap. On the bumpy Harris Hill track the bumps cause my foot to accidentally depress the accelerator just enough to send the wheels spinning. Not good. We are adjusting the throttle map to attenuate the tip-in throttle intensity. We are moving to a smaller brake MS for tighter braking control and we're going to get some stiffer shocks. Otherwise it's a blast to drive. Next up is to finish the various CF parts and get it painted. I also need to find some better doors. These are too banged up.

 

32823324312_a19f238dbe_h.jpg32596642300_0dbd57b606_h.jpg.


Edited by markrolston@mac.com, 6 days ago.

Mark,
RB26 Powered 240Z & Turbo VQ 240Z build in progress
http://www.rolston.m...Site/Z-car.html

#475 rturbo 930

rturbo 930

    Porschephile

  • Donating Members
  • PipPipPipPipPipPip
  • 1510 posts
  • LocationNJ

Posted 6 days ago

I'm surprised you didn't go with a composite door shell. Car looks good though. I like that it isn't too extreme looking, even though it is very extreme in every other way.


Owen | 1976 280Z | 1988 325is | 1986 Jetta | 1953 CJ3B

A car is a hole in the air, suspended there by four rubber doughnuts which you can not eat.
Into this hole, you throw money, which you will never see again.

 


#476 markrolston@mac.com

markrolston@mac.com

    Member

  • Members
  • PipPipPipPip
  • 284 posts
  • LocationAustin, Texas

Posted 6 days ago

I'm surprised you didn't go with a composite door shell. Car looks good though. I like that it isn't too extreme looking, even though it is very extreme in every other way.

composite doors are an easy way to get killed on the track without a ton of engineering in the CF structure. That's not something I can do. The car has steel where it's most needed.


Mark,
RB26 Powered 240Z & Turbo VQ 240Z build in progress
http://www.rolston.m...Site/Z-car.html




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users