What did you change, and as a refresher, what is yoursetup? I will be looking for 11.7 this summer.
XP with 105s, Ported blower with ZZP IC, N* TB, TOGs, 42#injectors, 3 inch mandrel exhaust and a pretty good canned tune. Best time with same MODs before I demodded was a 12.0@111 in 75*. So I think an 11.7 in cool weather should be possible if all is hitting like it should.
I took it to the track to night. I have been having problems getting it to shift into 2nd with the paddle shifter, and it shifts early on it's own. This time I left the shifter in "2nd" so it would up shift. I had the 235/60/15 DR's (M/T's) on the 7 inch GT wheels. I did the run with the dump open and the temps up to normal. This engine realy starts to pull good @ 4700 to 5000 rpm with the dump open. I backed into the water box, but could not spin the tires with out the car taking off. I left just off idle and nailed it. It didn't leave as good as it did the last time. I think I need to leave with the dump closed and open it as soon as the car gets moving. But it didn't spin off the line, ran clean and the trans up sifted @ 4600 rpm ( way early) into 2nd ( finaly). It pulled clean in 2nd and I saw 6800 rpm before it got 3rd ( I moved the shift @ 6500) It ran 12.9060 @ 110.27 mph with a poor 2.0371 60. I red lited ( the DR's work) the next run it was missing and knocking. I think it is time to change the plugs. My car # is "1984", in the right lane. 357 ci sbc, 4T60E, 2095 stall converter. car is about 3100 with me in it this night.
Here's my addition to the quarter mile list. 1987 GT with a 3800 series 2 4T65 HD with minor mods, 3.4 pulley with a VERY conservative Sinister tune. I think I did pretty good considering it was my first ever attempt at it. 13.3 @ 101mph, the animal next to me is a worked 6.2L Camaro with 500hp to the wheels. On the ticket I'm #5333 LEFT, I'm sure you can see that in the video below. http://youtu.be/1ff0MnOwNIc
[This message has been edited by JCircs (edited 08-21-2014).]
Yes, there was no KR present. I had a friend check the tune that's how I know it's safe and conservative (exactly what I would want and expected from a mail tune) and he said my timing is really not advanced and fuel goes very rich in the high RPM's and my wideband shows the same. I'm considering someone local but I think I might just add a intercooler with a smaller pulley then tune it once.
Yes, there was no KR present. I had a friend check the tune that's how I know it's safe and conservative (exactly what I would want and expected from a mail tune) and he said my timing is really not advanced and fuel goes very rich in the high RPM's and my wideband shows the same. I'm considering someone local but I think I might just add a intercooler with a smaller pulley then tune it once.
Actually I think your traps/ET are right on point if you are mostly stock. You could get to 13.0x with a better track day or more aggressive tune. You probably could pick up 2 mph here and there with colder outside temps and sticky tires. With a tune, a little leaner AFR, performance trans settings, and timing advance will also give a few more mph too.
The real magic happens when you add the supporting mods to run a 2.8-3.0 pulley and then it wont be a contest with that Camaro.
Yes, there was no KR present. I had a friend check the tune that's how I know it's safe and conservative (exactly what I would want and expected from a mail tune) and he said my timing is really not advanced and fuel goes very rich in the high RPM's and my wideband shows the same. I'm considering someone local but I think I might just add a intercooler with a smaller pulley then tune it once.
If it goes very rich, its not safe or conservative, its just wrong.
If it is rich and you don't want to tune it right away you could toss in some E85/E98 to lean it out. Mix it in until you see about 12:1 afr at wot. I think you will be pleasantly surprised.
Yes, there was no KR present. I had a friend check the tune that's how I know it's safe and conservative (exactly what I would want and expected from a mail tune) and he said my timing is really not advanced and fuel goes very rich in the high RPM's and my wideband shows the same. I'm considering someone local but I think I might just add a intercooler with a smaller pulley then tune it once.
Looks like he bogged down pretty bad on the launch. With a better launch, his ET would have been better. Look at it this way: it only gets better from here.
New mods new numbers. L67 XP hot cam with double roller chain, 140# springs, 42.5 Green Giant injectors, phenolic full size intercooler 2.9 pulley, auto 4T65e HD. Street tires and pump gas. 12.1@110mph 1.6 60 foot. The quest for 11's continue.
New mods new numbers. L67 XP hot cam with double roller chain, 140# springs, 42.5 Green Giant injectors, phenolic full size intercooler 2.9 pulley, auto 4T65e HD. Street tires and pump gas. 12.1@110mph 1.6 60 foot. The quest for 11's continue.]
Side note: I've been thinking of weeding the unverified entries out of the list. Some people have already suggested doing that. For starters, I'd like to just separate them out... drop them to the bottom or something.
Some people have stepped up and provided verification for their entries, which is great. But many have not. I've been tending this list for several years, so I think there's been plenty of time for people to verify their entries. I think it's time for them to start fading away.
Honestly, I believe it would be faster with the 2.93 gears. I have a couple things I think holding me back now. After running the 10.26 in 2012, I broke the input sprag and then snapped the drive chain.
Put the car back together for 2013, and had the zzp converter fail on me, I put a stock regal L36 245mm converter in and then snapped the 300m input shaft ending my year.
Put the car back together in the fall with a stock 4t65 and the stock converter and accidentally damaged the electric water pump. By the time I noticed it wasn't working, I had overheated the engine. Spent the winter putting together the new transmission combo, GM racing 3.11 gears, aermet input shaft with out oring groove, and had Precison Torque Converters build me a custom billet cover converter with the oring in the turbine hub to work with the input shaft. For now I have eliminated the TCC clutch but might add it back.
Last summer I took the car out and it was way down on power. Like 8MPH at the same boost. Chased my tail all summer, swapped the L36 out thinking I had hurt it when it overheated, wiped out the crank bearings on that engine. Picked up a L32 from another member on the forum here and swapped it in just before the last race of the year. The car ran even slower, due to the drop in compression. Finally in September, I had ruled everything else out, so I pulled the precision converter out and put the stock converter back in. The car was transformed instantly. Power was back, though it definitely spooled slower due to the tighter converter. Realized I pulled the L36 out for nothing, but had unfortunately not bagged it, and just threw it in the corner. It will need a full teardown and cleaning to be useable.
This last winter I sent the converter back and Precision adjusted it based on my feedback and data. When I put it back in, my old car was back. Tires didn't stand a chance, and the car accelerated similar to the rates it did in 2012. Unfortunately I now have a combo that I feel is less capable than my original setup. I am running more boost to make the same MPH due to the drop in engine compression, and I believe the drop in load due to the gears. I may put a taller tire on to test the gearing theory.
I had no doubt the original combo was 9 second capable, the current combo would need a perfect run, which I was unable to put together this weekend. I was originally a bit bummed out about the results, but then started thinking about it. The car ran Friday night and all day Saturday, ran 10.13, 10.21, 10.22 all faster than it had ever been and broke my MPH best multiple times as well. Ran a new best 60' at 1.42 and also ran 2 more 10 second passes, and multiple 11 second passes on low boost. All with only one CV failure at the outer splines where it meets the hub and no other issues. I may look at upgrading the uprights to use the larger outer cv's as that is the second time in the past year I have sheared a cv there.
The car has become more reliable than it has been in years, I actually drove it more this winter than I had in the past two summers combined. All in all, I am very happy with the car, I just wish I could have combined the 1.42 60' run with the 136 MPH run lol.
[This message has been edited by LFiero67 (edited 06-08-2015).]
I am about to make the switch to turbo, a2w and 93 octane, E85 is hard to come by in my location. 17 mile drive one way in the wrong direction. I figured I would make a post of the best I could do with the supercharger & a 3.1 pulley. I tried a 2.8 but I kept getting knock if I tried to get timing much above 13 degrees, even with the E85. All of my runs where 12.5's @ 108 with 1.7's for the 60' @ 20* timing. I got one 12.44 @ 109. with 22* of timing.
Left lane #598.
car info: 87 Fiero GT, 3800sc; 4T65E-HD; Comp Cam; 3.1" pulley, home ported sc inlet/outlet, N* & lq4, 3.0" exhaust, & plog, E85, dm300, 65# injectors, wb, hp tuners. Me 290#+ & full tank of fuel.
[This message has been edited by 2nasti (edited 07-02-2015).]
Solid 9s from the dh car this weekend. No major changes except a little different turbo.
Stop raising the darn bar you! Now I'm going to have to get a roll cage to go after the top spot. Seriously though, congrats on the MONSTER romp down the 1/4. Very impressive.
Now I'm going to have to get a roll cage to go after the top spot. Seriously though, congrats on the MONSTER romp down the 1/4. Very impressive. 
