Supra Forums banner

561 - 569 of 569 Posts

·
Inline for the win
Joined
·
4,682 Posts
Its always a pleasure working with you Alex. Hopefully one day we can actually have both our cars running at the same track! It definitely needs to happen.



One can only hope. If it doesn't go this year, I am not sure I will continue on with the 6 speed any more.
Seriously, get the engine right then worry about the drive train. It appears the past direction of successors has got you down a wrong path that you are fighting on letting go of. 47-80 or 47-88 are long gone with regards to efficiency. Like I say in my signature... Do more with less
 

·
Premium Member
Joined
·
1,245 Posts
Discussion Starter #562
are you coming back out to Illinois for another tune?
I'd love to, but I would love even more to fly Larry here! I am not sure I can make that trip again with my sad old beat up truck and trailer. Heck I couldn't make it home from Cbus w.o a blowout on the trailer. I think I need to replace most or all of the trailer tires on my rig.

Seriously, get the engine right then worry about the drive train. It appears the past direction of successors has got you down a wrong path that you are fighting on letting go of. 47-80 or 47-88 are long gone with regards to efficiency. Like I say in my signature... Do more with less

Re-read post 542,543 & 544 to refresh your memory. As stated before, I have a precision 88mm with a CEA billet wheel. Not sure how you can say that turbo is inefficient. As far as the T6/ T4 debate, I am happy staying T6. You may also want to talk to John Staats and Darin. Both are running the 76/91 which is basically just a trimmed down 88/91.. also a T6. Its just a matter of tweaking to get it all to come together....
 

·
I blame the Midwest Sect.
Joined
·
1,097 Posts
You gotta crawl before you walk. Put a 76ish size turbo on it and see how much easier and better it is to have a turbo that lights back up nicely between shifts. Go ahead and ask Darin what he thinks about running a rediculous 88mm turbo on a 6spd. No reason when he went 8.20's last year with a 76/91 and some nitrous.

I've gone much quicker than you with a dinosaur journal bearing heavy ass wheel gt42 style 76 from precision. It's all about getting the setup to work correctly, and when you have a piece that doesn't work, change it.
 

·
Premium Member
Joined
·
1,245 Posts
Discussion Starter #564
You gotta crawl before you walk. Put a 76ish size turbo on it and see how much easier and better it is to have a turbo that lights back up nicely between shifts. Go ahead and ask Darin what he thinks about running a rediculous 88mm turbo on a 6spd. No reason when he went 8.20's last year with a 76/91 and some nitrous.

I've gone much quicker than you with a dinosaur journal bearing heavy ass wheel gt42 style 76 from precision. It's all about getting the setup to work correctly, and when you have a piece that doesn't work, change it.
I agree I am biting off a lot more than I could chew and I am gnawing my way though it all now. If I started from scratch, It would probably not be on a T6 setup. But when I started in 2013, 80/88 was the ticket to 8s, so that is where I went.

Hopefully the next dyno visit gives me some hope. If I have to go back to a T4 at this point, I wont be able to get to my goal for years, and I frankly won't have the patience or cash to do so. Other personal endevours will be eating of the car funds for the foreseeable 24-30 months.

A little N2O should liven up the party as well as the E98 I plan to run. Time will tell. Maybe someone will buy the car from me, swap turbos and run 8.90s all day lol
 

·
Premium Member
Joined
·
1,245 Posts
Discussion Starter #566
Well as per usual, the car is making it a fight to do anything. Fuel seems to be the topic of discussion now.

I am doing more research but from what I thought, I was under the indication that the magnafuel 4703 would be enough to supply the power I wanted to make with putting it in line with my current fuel system via a sumped tank and -10 line (with check valves)

Unfortunately, it isnt. As you can see in the log file, I have a peak of 82psi of fuel pressure when the car comes on boost and then it drops off to 74psi. I am going to get a new filter filter for the car just to eliminate it as a possible point of pressure loss, but I am leaning toward it being a voltage issue to the pump which i thought the new 200 amp alternator would fix. it holds right around 12V through the power band.



After poking around, I found an old thread discussing Sij's old build on the 240SX. He ran a 4303 and a 4703 on a 16V system to feed the pumps the voltage they needed to get the volume up.

http://www.supraforums.com/forum/archive/index.php/t-683022.html?

SoundPerformance said:
Yes, we run two of the big magnafuel pumps on Sij's car. The second one is staged by the computer. Also note that we had to switch the car over to a 16v system to handle the power requirements as the 12v system could not handle it.
So now to combat that, I am going to either go mechanical with the fuel pump, or add a boost-a-pump to get the pump more voltage when it needs it.

Here is a shot with the car unloaded and ready to go on the dyno at B3R on 5/29/2016:



On top of the fuel issue, after some tuning, I now have another gremlin to chase out. After starting the car, driving it on the dyno, the starter decided it was time to not work. (as always with my car, its got a knack for not working at the most in-opportune moments). Thinking it was a bad starter, I spend a few hours swapping it out. Sadly, with the direct N2O and all the other "tucked" items, Its somewhat of a mess to change. I did eventually swap in a new starter, and it fired up. I tuned and dyno'd the car and made 1100 on the local shop mustang dyno around midnight, but ran into my fuel issue and stopped tuning there. We had a dyno day 2 days later, so I thought I was in the clear and it would be good enough for the Import HP Win on dyno day.

Here is a shot mid-repair.


Sadly when the car was started and moved out of the shop for the dyno day, the employee moving the car stalled it, and the car went back to not starting. I am assuming i have a partial broken wire in the starter wire on the engine bay harness, and the hiccup moved the wire enough to put it back in the solenoid clicking but not cranking mode.

I left the car at the shop after the show on memorial day, and just got it back home yesterday. I have yet to muster up the ambition to work on it with our freak heatwave of 95+ degrees.

Here is a pic from the show. Tim has taken some of the best shots of my car this year and last year at the track:
https://timhelfrich.smugmug.com/Big-3-Racing-Dyno-Day-52916/i-h5Vb6Zj/A

Once I do finally get the motivation to tear back into it, I will swap the filters in the system, Probably hard line the N2O setup so its a bit easier to work on (currently braided AN hoses which don't fit under the manifold well and train wreck your hands when reaching under the mani) Up size the jets to get a bit more N2O help (currently .024 jets, maybe .30 or larger jets) Fix the fuel system either via a Boost-a-pump or a mechanical pump, and then try to get another day on the dyno to get the car where I want it.

Contemplating a turbo change, but haven't decided if that's really in the budget considering all the other items that need squared away. (probably need a new engine harness, and either a mechanical fuel pump/boost a pump) All the turbos I would want to go with are around 3500 retail. Unfortunately other priorities in life are eating away all my car funds and it looks like it may be a sad year for my car. It seems that it only likes to run a season at a time, then go down for the following year. 2013 it ran, 2014 it had the motor pulled and re-ringed the engine, 2015 I had a decent season and broke some parts, and now 2016 isn't looking very likely to be a solid year at all.

The only sliver of encouragement to this story is how it acted on the dyno. Once the turbo lit, it was a wild beast. I feel like with the N2O upped a smidgen and a bit more power, I will finally be able to reach where I want the car to be, and either make it a full blown race car with a TH400, or turn it back into a street car with a 6870 or something smaller.
 

·
Premium Member
Joined
·
1,245 Posts
Discussion Starter #567
Its been a while, but some progress has been made. I wanted to recap where I am at currently.

The car starter was fixed, I did some mild sanding on the terminal lug and I've never had any other issues with the starter. I fixed it late in 2016, but never got a chance to run the car.

I have been going back to school since August 2016, so progress has been slow in 2017. Most of the year has been stacking up cash to try to get the car in a form that I am happy with.

I picked up a PHR mechanical fuel pump bracket and Weldon 34706 mechanical fuel pump (6.8gpm)

PHR Bracket
https://www.instagram.com/p/BNAVcZXgvmJ/?taken-by=chris_miller_supra

Weldon 6.8 GPM Pump 34706
https://www.instagram.com/p/BQEXYh7AcyH/?taken-by=chris_miller_supra

I also picked up a CPC Carbon manifold with 12 injectors along with another set of FIC 2150s I plumbed it for a direct nitrous port injection and am prepping to get it on the car

CPC Manifold
https://www.instagram.com/p/BQMRv9PjXKK/?taken-by=chris_miller_supra
CPC Manifold with N2O jets
https://www.instagram.com/p/Bb11qp9lRzx/?taken-by=chris_miller_supra


I also picked up an IGN1-A Coil setup from Induction performance
https://www.instagram.com/p/BSooKlXhITI/?taken-by=chris_miller_supra

I did a few car shows at the request of some friends who run a cars and coffee meet, so my car made an appearance there as well, but that was about it for 2017 car functions. I didnt really have the money or time to do much with the car.

I had the opportunity in September to pickup a Rossler Pro-Mod max that was once in a famous blue car. It wasn't really "in the budget" but when you find exactly what you want in practically new condition and much less than MSRP, you have to find the funds and make it happen. This wont go in quite yet, but soon enough it will be the gearbox of choice.

Rossler Pro-Mod Max TH400
https://www.instagram.com/p/BYlQoAlhS7K/?taken-by=chris_miller_supra


Now we roll into Black Friday 2017 and near the recent events. I have been fighting gremlins for quite some time from the wiring side, so I bit the bullet and decided to have the car re-wired. We also planned to add to the cage to make it 8.50 legal, but found out that the cage design wouldnt end up cert-ing. the only option was to cut it out and start from scratch. I wasnt too heart broken because the original roll bar was mild steel and had some decent age on it. BP Autosports is stepping up to help me with this project and will be handling the chassis and wiring project.

Wiring on the shop floor:
https://www.instagram.com/p/BafMk8zldTN/?taken-by=chris_miller_supra

Cage cut out:
https://www.instagram.com/p/BbW7TvHFNz1/?taken-by=chris_miller_supra
https://www.instagram.com/p/BbW7TvHFNz1/?taken-by=chris_miller_supra

With all the changes, I have been in the shop every so often to help with the upgrades. I have mocked up the PHR Mechanical pump bracket and pump and in the process found other upgrades to be added including a Meziere electric water pump and a Grannas manual rack.

Mechanical pump Bracket
https://www.instagram.com/p/BbdnP0nF_UE/?taken-by=chris_miller_supra

Bracket and Meziere installed
https://www.instagram.com/p/Bb40yNplQLV/?taken-by=chris_miller_supra

Grannas Manual Rack
https://www.instagram.com/p/BcGOGEmF5Gw/?taken-by=chris_miller_supra

Basically the plan is to get the car down in weight, put the minimum in for wiring and wrap up the upgrades that are planned. I also decided to lose the stock steering wheel and go with a sparco setup, which is on order.

I am still unclear if I will have the car out in 2018 due to the school commitment, but the goal is to wrap up the car and have it ready for when I do have time to go run it.

I apologize for the Instagram links, but they are the only reliable location that I share photos from currently. Its probably the best location for real-time updates if you are into that sort of thing.
 

·
Question to suit.
Joined
·
3,562 Posts
Always pushing things further and further. Loving it!

You are shooting for some very high numbers with that fuel pump. Looking forward to seeing this thing rip next year.
 
561 - 569 of 569 Posts
Top