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  #471  
Old 10-20-2014, 11:45 AM
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Glad you could make it. Steve and I shared driving TOW during the local autocross at COTA yesterday (parking lot, not on the track unfortunately). We each had 5 runs, and we rode with each other each time. It was cool to get a different perspective by riding in my own car on the course. We have different driving styles, and that's what I was hoping for.

We decided at the end of the day that we likely provided the most entertainment for the spectators because we were both blowing the last turn of the end on almost every run (it was a 180* turn). And Steve did his best to wipe out the codes and timing lights at the end too.

I'll have videos up on YouTube tonight. I'm new with a GoPro, so I'm trying to get them into the best format while not being huge. So far they look pretty good.
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  #472  
Old 10-21-2014, 10:40 PM
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Videos are up...

Here is my best run of the day (5th, last) from the top of the car as well as behind the rear tire. The fastest raw run times of the day were in the middle 29-second range. I ran a 34.9 and Steve hit a 35.5. Pretty good for his first time in my car!





Here are all of my runs:

Bryan's Runs

And here are Steve's runs:

Steve's Runs

Note the exit on Run5. He will thank me for chopping off his exits from the course on the previous runs.
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  #473  
Old 10-22-2014, 07:22 AM
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rat_rod_russell rat_rod_russell is offline
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Nice! Didn't know they were running at COTA.

What did Vtec run in the Banshie MX5? Also you should let him take you for a ride in your car. He used to race Trans AM is memory serves and is solid on RWD platform big HP cars. He's got a lot of experiance building and tuning and is an instructor at The Driveway last I checked.

-Russell
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  #474  
Old 10-22-2014, 11:40 AM
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Quote:
Originally Posted by rat_rod_russell View Post
Nice! Didn't know they were running at COTA.
This is the second time they have run there. They use one of the large parking lots for the course (lot H). It's a good spot for the course, since they are having trouble finding good spots around Austin itself.

Quote:
What did Vtec run in the Banshie MX5? Also you should let him take you for a ride in your car. He used to race Trans AM is memory serves and is solid on RWD platform big HP cars. He's got a lot of experiance building and tuning and is an instructor at The Driveway last I checked.

-Russell
Vitek finished in 2nd place in raw time with a 29.5. That little Miata with the LS is fast! And this is a replacement engine. He grenaded the LS3, so I think this is an LS1 he's running.

Interesting idea about letting him drive. I hadn't thought of that, but I would do it. I've chatted with him some, and he let me use his scales when I was setting up TOW this time. I imagine he would enjoy the chance, he seems to really like TOW. Hmm...
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  #475  
Old 10-22-2014, 05:21 PM
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Quote:
Originally Posted by carbuff View Post
Vitek finished in 2nd place in raw time with a 29.5. That little Miata with the LS is fast! And this is a replacement engine. He grenaded the LS3, so I think this is an LS1 he's running.

Interesting idea about letting him drive. I hadn't thought of that, but I would do it. I've chatted with him some, and he let me use his scales when I was setting up TOW this time. I imagine he would enjoy the chance, he seems to really like TOW. Hmm...
If your planning to do the driveway ask Him as well. You'll want him or Bill as your personal instructor. Also his name is spelled Vitek. I keep trying to make him a honda cam in my head for some reason. (Sorry Vitek)

Also, and be ready to be butt hurt, the Banshie has a 5.3L in it now..... teehee, I rode with him in his STi but I've seen the videos of that little MX5 so 2 in raw time doesn't surprise me.
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  #476  
Old 10-23-2014, 11:35 AM
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I'd be interested to see what Vitek can do in the car too. That would be fun to watch.

Thanks again for letting my run. Did any of the vids get me taking out the cones or the finish line? How about some tire smoke from coming in too hot? If so you should post up for a lesson of what not to do.
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  #477  
Old 10-23-2014, 11:58 AM
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Originally Posted by gerno View Post
I'd be interested to see what Vitek can do in the car too. That would be fun to watch.
Or to ride with.

Quote:
Thanks again for letting my run. Did any of the vids get me taking out the cones or the finish line? How about some tire smoke from coming in too hot? If so you should post up for a lesson of what not to do.
I trimmed the vids for you, to save some face. But the end of your run #5 is a bit entertaining. I can put up the ones where you got "lost" at the exit also if you like, but I trimmed them off also...

I haven't watched all of the tire runs looking for smoke. Feel free to point it out though.
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  #478  
Old 10-23-2014, 01:09 PM
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I missed that you posted the link. It's interesting how much less abrupt all the runs look on video than when we were in the car. It's also interating to see the front tire deflect as it is
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  #479  
Old 03-27-2015, 10:30 PM
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Time to bring this thread up to speed, since it really is the place where I document the car...

Since we last spoke, first this happened:

Dropped valve thread

and while I was repairing that, I started a thread on Accusumps here:

Accusump Plumbing

and during this time a few other things changed too. Below are the highlights of the new engine combination:
  • LS7 Block, honed to 4.127"
  • Callies Dragonslayer 4.000" Stroke crank (from the 402)
  • Callies Compstar 6.125" Rods with 2.0" journals (from the 402)
  • Wiseco pistons with 4cc reliefs (~12:1 CR)
  • TFS GenX LS3 heads, custom ported by Frankenstein Racing Heads
  • Custom cam by EPS (238/248, .629/.604, 114)
  • Morel 5315 lifters
  • Edelbrock Victor Jr. L92 intake, ported by FRH (plenum and port match)
  • Rocker arms upgraded with Harland Sharp trunions

Those were the big changes, lots of other little things in there too. And while I had it apart, I replaced the clutch also with a Monster LT1-S, their custom-flywheel which uses the new LT1 twin-disk clutch pack on an LS engine.

As noted in the thread above, it was a session of thrashing to get everything together and back into the car and get her ready for the Spring GG event in Fort Worth. I was bolting on parts until late the night before I drove up. But the drive went well, and TOW performed excellently! I finished 3rd in the Street Machine class. The newfound power definitely helped. The driver needs more work though.

This past week has been another thrash session to get the car ready for my first USCA event this weekend. One of the things I have been wanting and needing to do is to have the car dynoed and then tuned. I've had trouble finding anyone who seems to specialize in the Holley HP EFI systems, but I did locate someone about 2 hours from me last week. Turns out he had a slot available on Thursday, which fit perfectly into my schedule as well. So I drove over to his shop and spent about 4 hours between the dyno and street tuning.

Jumping straight to the good stuff, since everyone loves pictures and results:



Ignore the red line, that was a timing experiment. The blue line was our final result: 541 HP and 502 ft-lb of torque. Those numbers are through my T56 Magnum and a set of 3.89 Ford 9" gears, which apparently cost a little power. Also this wasn't a DynoJet, but instead a load-bearing DynoCom setup. What I do know is that on this run, she actually laid down 568 HP, but the SAE correction factor brought her back down to the 541 number. Stout!

What I am really enamored with though is that torque curve! It's almost exactly what I had asked for when I had discussions with the various people that contributed to my parts selections. It's broad and consistent, and you can feel it in how the car pulls through the gears.

He attempted to pull all the way to 7k RPM, but for whatever reason the dyno wasn't correctly capturing those last few hundred rpm. You can see how the curve doesn't roll over immediately, but instead carries the power. It's great!

Before taking the car to him, I have done a lot of reading and research on tuning the Holley. I've also worked hard to try and set my fuel and timing tables. Interestingly, he reloaded my tune at the end and did a pull to see how it compared. I was at 532 HP and similar torque to the final runs, meaning my tune was pretty close to his final result. That was pretty cool.

After we dynoed, we drove on the streets for about 45 minutes with him dialing in different areas in the tune. He leans the car out quite a bit, added some part throttle timing, and cleaned up a few other things. I kind of expected him to do work on some other areas of the setup, but he didn't think it was necessary. I do still have some cold and hot start work to do, she doesn't always start right up like she used to with the 402 for some reason.

I drove back up to Fort Worth today with the new tune. The engine definitely felt smoother during the drive with the timing and leaner tune. I also picked up some mileage, a little over 2 MPG vs. where I was. I still don't think I'm optimal there yet, so I'll work on that some more. But that's no small improvement in its own right.

More to tell, but I need sleep now for tomorrow. Just wanted to get these out there to share.
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  #480  
Old 03-27-2015, 10:34 PM
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Oh, I forgot to mention, just for GW;

We pulled the shaker off, leaving just the air cleaner in place, to see what the shaker costs me. Only 2 HP, and basically nothing during the rest of the run. I really was shocked by that result, as I figured the shaker would be a big limitation. I was wrong. So, thanx Weld for the suggestion on the foam top air cleaner. It seems to be working pretty well.
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