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:thumbsup: sounds like the progress is winning, and learning new stuff is a good thing!
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It's the little truck engine that defies Hot Rodding logic...but I like it!! :D
I strapped Barney to a chassis dyno once again yesterday and made some pulls to test and verify that the changes I made this winter helped...and I'm happy to report that they did. The peak HP and Torque numbers didn't change that much since the last time I had it on the dyno 2 years ago, I lost a couple of peak Ft Lbs and gained about 15 peak HP. The big difference though is between 4000-5000 RPM I picked up around 25 HP and around 15 Ft Lbs and the overall Torque and HP curves are much flatter and more consistent completely across the board. This backs up what my butt dyno had been feeling since the upgrades. To catch everyone up, what I changed to accomplish this was pull the 30 year old carb, distributor and CCC ECM from the car and replaced them with a mechanical Q-jet, MSD Billet Distributor and a MSD 6AL Programmable ignition box. The new parts help feed and spark it better on the top end which is an area it sorely needed help in. What was interesting to me was the timing changes we made during the 6 pulls. We started out with the total timing at 34* all in at 2800 RPMs. We made 2 pulls and liked what we saw, there was no pinging and the engine pulled strong all the way to 5500 RPM. Just to see what would happen, I took 1 degree of timing out...and it picked up about 5 HP across the board!! So I took another degree of timing out (now at 32*) and made another pull...this time it picked up another 2-3 HP across the board. What the heck, lets try one more...put it at 31* still all in at 2800 RPM and it picked up another 1-2 HP once again across the board. Air Fuels were steady at 11.75-12.25 all the way through every pull. We left it there at 31*. That's where it made the most power but more importantly, it's a very happy engine there...and safe. We made 6 pulls within a half hour stopping only to examine the chart and adjust the timing between each pull and the engine never got hot enough to kick the electric fans on (we did have the floor fan pushing air into the front of the car). What I have here is a rock solid stump pulling engine that puts 300 HP and 400 Ft Lbs to the rear tires just about across the board that is very comfortable in daily driving situations and can light the tires up at will or run great times on course...without skipping a beat or getting hot. I love it. The dyno printer was malfunctioning so I didn't get an official printout of the graph, so I took some pictures of it with my phone. This picture shows the whole screen but has flash glare right in the center of it. The blue line was the best pull from 2 years ago and the red line is the best pull from yesterday. https://lh6.googleusercontent.com/-w...0318151323.jpg This one shows the curves a bit better https://lh6.googleusercontent.com/-S...0318151324.jpg Here's a video of the last pull of the day. I the left the shop and took the car to the fab shop to let them get started on the roll bar installation. Hopefully in a week or so I'll get it back and can start putting the interior back in the car again to get it ready for our first event April 11th... |
That's some good figures there for a not so radical motor. Nice.
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You should notice a nice difference on the course with the improvements.
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Thanks Ben, I agree... It also got 14.8 mpg on the first tank after upgrades...with me beating the snot out of it just about the whole time.
I agree Wayne, I can already tell where it helped the most just by street driving it. I still have a set of 1.6:1 roller rockers to put on it as well which should help a little bit more across the board. |
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A year with over 4,000 street miles, several races and road trips in heavy rain, even a day on wet roads with salt residue on them...and the only maintenance has been the occasional rinse off at the car wash and wipe down with a microfiber towel. https://lh3.googleusercontent.com/-n...0404151048.jpg https://lh3.googleusercontent.com/-l...404151048c.jpg https://lh3.googleusercontent.com/-i...404151048d.jpg https://lh5.googleusercontent.com/-G...404151048e.jpg https://lh5.googleusercontent.com/-V...0404151049.jpg They aren't perfect...they've got some crust in the nooks and crannies and some surface scratches in them...but ZERO water spots and still look pretty damn good considering the abuse I put them through in the last year. Yes...I'd use ShineSeal again on any billet rims I own. |
Nice! I'd be happy with those results, too.
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Yeah Lance they do still look great. I'd def go this route if i'd kept my Billet's (if only they were wider....lol).
So this is a very similar technology (nano-coatings) we use in the shower door coating biz....works very well...i had never thought of putting a "coating" on the rims (although i've been putting rain-x on autoglass since the 80's).... :thumbsup: |
While I'm certain there are pro-touring or street cars out there on the road with roll bars or cages that are more significant than this one turned out, I'm also certain that there are cars out on the road and track today with roll bars\cages that are not as safe and secure as this one turned out. There are also other cars out there that are doing track days and such that probably should have a roll bar or cage in them...but don't because the owners don't want to make the changes necessary to put a safety device such as this in their street car. I respect all of those owners decisions...it isn't easy making a modification this drastic to ones car. In fact, I had planned this whole thing out...and then promptly bailed...deciding to not make the change myself. I then stumbled on a great deal on the seats you see here...and it was on again.
This is a 1.75" dia, 0.120" wall 4 point roll bar with a diagonal cross bar and a harness bar. The feet of the main hoop are welded to plates that are welded to the floor of the car directly above a structural floor brace that is also right above where the #4 body mounts connect the frame to the body. Here is one of the main hoop base plates https://lh6.googleusercontent.com/-o...o/DSC06135.JPG and in this picture you can see where the welding burnt through the paint on the bottom side of the floor in front of the brace. This shows the location of the base plate directly over the body mount area. https://lh6.googleusercontent.com/-h...o/DSC06128.JPG The down bars are straight and go back to the rear seat back area where they are welded to plates that are welded to the body structure directly in front of the #5 body mount. It's harder to get clear pictures here, but the body structure behind the plates is where the trunk floor meets the seat back brace and is directly over the frame just in front of the body mount. Here is the base plate https://lh6.googleusercontent.com/-J...o/DSC06138.JPG And it this picture from the inner fenderwell you can see where the weld burnt through the paint not only on the fender well but also the bottom of the body just in front of the mount. https://lh5.googleusercontent.com/-v...0405151044.jpg These cars are built with the body being the main support for the somewhat flimsy frames, not a whole lot different than a typical unibody car. What this bar does is just strengthen that unibody significantly while providing rollover protection as well as a proper shoulder harness mounting location. I'm very happy with how it turned out. Here are some pictures of the inside. My good friend John bent up some sheet metal based on some cardboard templates I gave him to build a package tray with. This picture shows them in place. I'll eventually have matching carpet that will go from the rear speaker tray down to the floor finishing this area out nicely. https://lh3.googleusercontent.com/-m...0405151407.jpg https://lh3.googleusercontent.com/-Q...405151407a.jpg https://lh5.googleusercontent.com/-z...405151407b.jpg And also a few with the seats reinstalled once again https://lh5.googleusercontent.com/-w...405151606a.jpg https://lh5.googleusercontent.com/-x...0405151606.jpg Just got the interior all buttoned back in place a few hours ago. I'm having some packaging issues getting the 5 point harnesses mounted the way I want...but there is now a plan in place and that still might happen before my two autocross events next weekend. If not, the factory 3 point belt actually fits me very well in these seats. BTW, I've really grown to liking these seats. You fall down into them and don't move once there and they are very ergonomically correct which makes them very comfortable for a one piece fiberglass seat without a ton of padding. Eventually I'll look into getting them recovered a burgundy color but they'll do like this for now. Now, crawling back out of them, that's another story... :D I need a grab bar or something to help pull me back out of them when exiting the car. |
Great build, sir. I love that you are doing it right (ie. working with Ron Sutton). And the progression in stages with the results of the season at each stage is awesome. I also really like how you and Ron explain the changes you made, and you can verify the benefits with seat time. Thank you for such a thorough build thread.
Nice rollbar, by the way. Car looks really good. |
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