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Re: Our '68 GTS Project [Re: 68 HEMI GTS] #2954322
08/16/21 03:10 PM
08/16/21 03:10 PM
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Rogue River, OR
Jeremiah Offline OP
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Originally Posted by 68 HEMI GTS
Love your Dart! I have it’s sibling. QQ1 383 4 speed GTS, although mine has gotten kind of away from original.


Let's see it! I really like Bright Blue, it is a cool color in a two-stage urethane. Ours will get restored one of these years. I have been slowly collecting parts for the interior..man those a-body 4-speed consoles are pricey. There was a nice blue one for $500 recently.


I thought better of blowing the $500 on interior stuff and ordered a solid roller cam from PRH. : D

Some lifters, push rods and a set of Comp Pro-mags and I'll be ready for a cam swap.



Re: Our '68 GTS Project [Re: Jeremiah] #2955737
08/20/21 04:07 PM
08/20/21 04:07 PM
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Rogue River, OR
Jeremiah Offline OP
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Well it looks like racjng is canceled this weekend. That is not the worst thing considering I am coming off of 3rd shift. Headed off to do more tuning on the rollers. Happy Friday!

20210806_194505.jpg


Re: Our '68 GTS Project [Re: Jeremiah] #2955834
08/20/21 10:21 PM
08/20/21 10:21 PM
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Temperance, MI
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68 HEMI GTS Offline
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Originally Posted by Jeremiah
Originally Posted by 68 HEMI GTS
Love your Dart! I have it’s sibling. QQ1 383 4 speed GTS, although mine has gotten kind of away from original.


Let's see it! I really like Bright Blue, it is a cool color in a two-stage urethane. Ours will get restored one of these years. I have been slowly collecting parts for the interior..man those a-body 4-speed consoles are pricey. There was a nice blue one for $500 recently.


I thought better of blowing the $500 on interior stuff and ordered a solid roller cam from PRH. : D

Some lifters, push rods and a set of Comp Pro-mags and I'll be ready for a cam swap.


Yeah I painted it 68 charger red about 15 years ago. Wish I would have did it back to its original qq1 now that I’m a bit older.

32EB7EC6-C8A3-4C2B-B3EA-4FC967C9C50C.jpeg

68 Dart GTS "HEMI" 10.30 @ 131 pump gas street car 3780#
69 Roadrunner 511 six pack 10.92 drive to track street car
Re: Our '68 GTS Project [Re: 68 HEMI GTS] #2955916
08/21/21 10:19 AM
08/21/21 10:19 AM
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Rogue River, OR
Jeremiah Offline OP
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What a cool car! We have two red mopars ('66 Coronet and Charger) so I totally understand! : D

I spent a little time tuning the QF1050AN yesterday before getting called out for work. I am really having a hard time getting the light throttle/cruise from being dead rich in the 10's. It was better with a higher HSB so maybe I will go that direction.

At this point I have it jetted 81/91, 4.5PV/Blocked, .067 PVCR (need to go .068-.070 with the 81 jet), top three emulsion holes in the primary are .037/.064/.066. Secondary t-slot about .010 and primary about .020. It idles at 900-950 with 14 initial and 36 total advance.

Next trip I will spend more time on the carb and pull the covers and check the valvetrain/lash. That way if my carb tuning session is a failure I'll have accomplished *something*. You all know how it goes!



Re: Our '68 GTS Project [Re: Jeremiah] #2955932
08/21/21 11:07 AM
08/21/21 11:07 AM
Joined: May 2009
Posts: 511
Temperance, MI
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Originally Posted by Jeremiah
What a cool car! We have two red mopars ('66 Coronet and Charger) so I totally understand! : D

I spent a little time tuning the QF1050AN yesterday before getting called out for work. I am really having a hard time getting the light throttle/cruise from being dead rich in the 10's. It was better with a higher HSB so maybe I will go that direction.

At this point I have it jetted 81/91, 4.5PV/Blocked, .067 PVCR (need to go .068-.070 with the 81 jet), top three emulsion holes in the primary are .037/.064/.066. Secondary t-slot about .010 and primary about .020. It idles at 900-950 with 14 initial and 36 total advance.

Next trip I will spend more time on the carb and pull the covers and check the valvetrain/lash. That way if my carb tuning session is a failure I'll have accomplished *something*. You all know how it goes!


I had to put a transfer slot restriction in my 4150/1050 AN carb. I thought I had the specs written down but I never did on that one. Mine runs like it fuel injected, just took some playing to get it there.

Last edited by 68 HEMI GTS; 08/22/21 08:32 AM.

68 Dart GTS "HEMI" 10.30 @ 131 pump gas street car 3780#
69 Roadrunner 511 six pack 10.92 drive to track street car
Re: Our '68 GTS Project [Re: 68 HEMI GTS] #2956232
08/22/21 10:45 AM
08/22/21 10:45 AM
Joined: Mar 2003
Posts: 9,099
Rogue River, OR
Jeremiah Offline OP
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I think you are correct. My other 1050s needed the also. I would be interested to see where yours ended up.

Slowly collecting parts for the Dana swap. So far i have:

Housing
Ends
Power lock
28x9st M/Ts
3" studs

I need:

Perches
Offset hanger kit
15x8 steel wheels
Axle kit


I am still undecided on brakes, gear ratio, and to cal trac or not to cal trac.



Re: Our '68 GTS Project [Re: Jeremiah] #2958287
08/28/21 11:47 AM
08/28/21 11:47 AM
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Rogue River, OR
Jeremiah Offline OP
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I scored this low deck street dominator. Hopwfully it fits under the hood.

20210824_174930_resize_92.jpg


Re: Our '68 GTS Project [Re: Jeremiah] #2958290
08/28/21 11:50 AM
08/28/21 11:50 AM
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Rogue River, OR
Jeremiah Offline OP
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I milled off the egr and choke stove. It was really heavy to begin with.

I also struggled with cutting this winters casting with a bur that usually works well on aluminum. A friemd told me to try crisco and it actually worked. Easy clean up with simple green also.

20210825_193510_resize_55.jpg


Re: Our '68 GTS Project [Re: Jeremiah] #2958293
08/28/21 11:54 AM
08/28/21 11:54 AM
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Rogue River, OR
Jeremiah Offline OP
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I left the flange, plenum and ports unmodified. The plenum will need to be check against the spraybars in the nitrous plate before it gets bolted down.

20210828_010651_resize_34.jpg


Re: Our '68 GTS Project [Re: Jeremiah] #2958310
08/28/21 12:39 PM
08/28/21 12:39 PM
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Hot Rod Ridge
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Did you lighten it on the mill

Re: Our '68 GTS Project [Re: Jeremiah] #2958340
08/28/21 02:13 PM
08/28/21 02:13 PM
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So. Burlington, Vt.
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fast68plymouth Offline
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There’s plenty of ugly stuff that can be cut off a SD manifold.

I’ll be looking forward to the chassis dyno results after you swap it out.

303CBD25-9CA9-46C8-896A-A8C616915433.jpeg

68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: Our '68 GTS Project [Re: fast68plymouth] #2959112
08/30/21 06:11 PM
08/30/21 06:11 PM
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Posts: 9,099
Rogue River, OR
Jeremiah Offline OP
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That intake is cool! Is it the same height as it started or did it get taller with the dominaor flange. I am considering milling my intake down to the runners and welding a HVH super sucker on it or something like that.



Re: Our '68 GTS Project [Re: FastmOp] #2959115
08/30/21 06:15 PM
08/30/21 06:15 PM
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Rogue River, OR
Jeremiah Offline OP
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Originally Posted by FastmOp
Did you lighten it on the mill


I went as far as i could without having to build a bunch of special fixtures. Then clean up my sins with the die grinder. The mill saved me hours. I also smoothed the runners at the unused plug boss on #8 and the 1/8-27 npt plug in the bottom of the plenum with some epoxy. I am uneecided on which direction to go with the intake. Whatever happens I'd like to keep the stock hood.



Re: Our '68 GTS Project [Re: Jeremiah] #2959814
09/01/21 09:10 AM
09/01/21 09:10 AM
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Rogue River, OR
Jeremiah Offline OP
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Well I missed eacing this weekend because of work call outs and air quality. I just didn't have it in me to go hang out in 95 degrees and smoke. It irked me as I was very excited to run the car but that's how the dice fall some times. The last event is on the calendar is Sept 10-11 so hopefully the stars will align for me to get down to the track.


I found some time yesterday to swap over the strip dominator intake and it feels good. I am still working on the carb recalibration but it is close. A little dar at cruise, 1/2 a point lean at WOT. Once I am comfortable with the driving around town AFR numbers we will put it on the rollers again.

Normally I would have just gone straight to the dyno but the wildfire smoke has been bad down in the valley. Much more comfortable tuning up here in the country out of that nasty smoke.

My other hurdle was my NOS nitrous plate. Apparently it is powder coated because when i started peeling the gaskets off the black powdercoat started coming with them. Sure as heck didn't want any of that stuff going through the engine so we switch to a ZEX perimeter plate while still retaining the same monte Smith/NOS big shot solenoids. I might buy another big shot plate to test against but probably not. The lesson here is buy a nitrous plate that is anodized and avoid the problem I described above.



Re: Our '68 GTS Project [Re: Jeremiah] #2973430
10/12/21 01:10 PM
10/12/21 01:10 PM
Joined: Mar 2003
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Rogue River, OR
Jeremiah Offline OP
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In the last post I mentioned changing the n20 plate from a spray bar style to a ZEX perimeter plate due to the powder coating coming off. Interestingly the perimeter plate hits much, much softer than the spray bar plate even with a faster ramp in rate on the progressive.

I also had swapped out the DP4B/Performer to a Holley Street Dominator intake and it seems to have killed the bottle neck at 5800. I am now able to hit the limiter at 6300RPM which is interesting. It took a little getting used to having such a short legged engine when you are used to a 7000ish RPM redline. The intake seal went away after a few days so I removed it, cleaned everything and measured gaps at the bottom of all port flanges. I measured variances from .003-.010 and figured a .030 (uncompressed) gasket between the bathtub gasket and manifold would seal it up. Luckily it worked perfect and really helped me get the carb dialed in having steady AFR values. When the intake seal went loco AFR was all over the place. I think that might have been my last oil leak for this one..I hope.

Ran the No Prep event at Medford dragstrip this weekend! It was a good time and I made 10 n20 passes. By the end of the night I was launching it at 5k RPM with a .5s delay in the progressive starting at 80% and ramping for .5s. Left hard and "4-speed straight" with some shock tuning we did in the driveway last week. Still on the 235-60-14 M&H muscle car bias tire.

I'll repost some pictures from the track photographer when they come out. I tried so many times to post pics here but they are too big or sideways so I gave up. Hopefully I can hotlink some content. None of my friends or family showed up so as usual I was all by myself. Oh well.

There were a ton of cool mopars. At least 3 or 4 turbo cars from a 906 headed blow through deal to Gabe Cogswell's Devil Dart with the billet twin turbo HEMI. If you haven't seen Gabe's car google it. It's sick! He told me it went 174 in the 1/8th over the summer! Still wrapping my mind around that number lol.

I ended up being the *only* daily driver entry that stuck around (also only car in DD tuning Friday night) so after winning my class by default they bumped me into the 275 tire class. Now we are bringing a knife to a gun fight and the GTS is way outclassed. Running a group of cars with cal tracs and power adders. Purpose built cars for the most part. Luckily that made me continue to turn it up lol. Nothing like peer pressure huh.

Luckily I drew the bye (odd number of cars running) and then ran a blown, dual 4 barrel 64-65 Chevelle that had an oiling problem. He bought back in and I ran him in the semi's and aaaaaaaaalmost had him from the gate but he came around me when I hit the limiter in 3rd right at the 1/8th. Need that solid roller. It felt pretty good leaving on a blown BBC on a 275 tire and actually having a race with it in my very small tire 4 speed Dart with the factory exhaust manifolds, valve covers and air cleaner.

Really looking forward to 2022!

This winter my plans are:

Roller Cam/Lifter/Comp Pro Mag rockers
Seat foam/covers (my eyes are still burning lol)
Dana 60
28x9 slick or a DOT bias equivalent to the 275/60/15

Other than that the 451 still sounds great, clutch feels awesome and the transmission is holding up to WOT power shifting. To me having everything stay intact and functional is a win in itself.

Thanks for Cab, HardcoreB, Dwayne at PRH and a few other of my buddies that have answered questions and let me bounce tech questions off of them. It really came together at this last race.



Also thanks to AndyF for helping me with my throttle linkage at the last minute! His solution worked awesome as always.



Re: Our '68 GTS Project [Re: Jeremiah] #2973453
10/12/21 01:33 PM
10/12/21 01:33 PM
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Posts: 4,045
Shelby Twp. Mi
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Originally Posted by Jeremiah
I

...they bumped me into the 275 tire class.

Luckily I drew the bye (odd number of cars running) and then ran a blown, dual 4 barrel 64-65 Chevelle that had an oiling problem. He bought back in and I ran him in the semi's and aaaaaaaaalmost has him from the gate but he came around me when I it the limiter in 3rd right at the 1/8th. Need that solid roller. It felt pretty good leaving on a blown BBC on a 275 tire and actually having a race with it in my very smal tire 4 speed Dart with the factory exhaust manifolds, valve covers and air cleaner.

Really looking forward to 2022!

This winter my plans are:

Roller Cam/Lifter/Comp Pro Mag rockers
Seat foam/covers (my eyes are still burning lol)
Dana 60
28x9 slick or a DOT bias equivalent to the 275/60/15


LOL! That is awesome!!! Just tune your stuuf to optimum and run your race and sometimes...it's just your day! Thanks for the update and those changes will wake it up significantly! (ET wise anyway) I think Dwayne is a good source for a camshaft upgrade.

Re: Our '68 GTS Project [Re: HardcoreB] #2973521
10/12/21 02:37 PM
10/12/21 02:37 PM
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Denver, CO
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Thanks for a great write up and sharing what you have learned. Like your car a lot.

Re: Our '68 GTS Project [Re: Jeremiah] #2973606
10/12/21 04:56 PM
10/12/21 04:56 PM
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Pattison Texas
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Thanks for taking the time for the update, very COOL !!!!!! what kind of times is it running now ?


1968 Charger COLD A/C Hilborn EFI
512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim
2020 T/A 392 Stock 11.79 @ 114.5

Re: Our '68 GTS Project [Re: CSK] #2973640
10/12/21 06:42 PM
10/12/21 06:42 PM
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Rogue River, OR
Jeremiah Offline OP
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Thank you for checking in. I never did get to run it with the clocks on again. 12's are no problem! : D



Re: Our '68 GTS Project [Re: Jeremiah] #2974272
10/14/21 11:05 AM
10/14/21 11:05 AM
Joined: Mar 2003
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Rogue River, OR
Jeremiah Offline OP
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I guess this is the best pic they shot of the GTS. Not hard to understand considering the caliber of cars that showed up to race.

GTS Oct_09_2021 No Prep.jpg


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