eutu1984

Had lots of tire spin but had a grate time anyway, starting at left 1st run, 2nd run, and 3rd run.

Year is 1990
engine 383, stock L98 heads, stock TPI intake, 52mm tb.
comp cam 08-302-8 http://www.compcams.com/Company/CC/c...?csid=212&sb=2
1.52 roller tip rockers.
headers, true dual OBX exhaust with X Pipe.
Auto, 3.07 gears in rear.
stock rims and conti's dws all season tires

ghoastrider1

it sure is fun isn't it. I love dropping the hammer down on that last yellow.

TA

You definitely need some drag radials

eutu1984

I would pop for drag radials but I need to save my money for other things and I would worry about blowing my little dana 36. in may are club gets together for another track day. a lot of newer mustangs were ther running mid 14's and a new dodge charger all had trouble with traction. the right lane they were using for cars with slicks and the left lane for street tires, it looked like they were hooking up real well on the right lane, temp at the time was high 50's.

Cjunkie

You really need drag radials. Drag radials will do MORE for you than any one of your mods. I may be wrong but with a 3.07 rear shouldn't you have a D44 rear?

C409

..... 3.07 was the optional performance ratio for the D36 ... the early 4+3 cars had 3.07 D44's from the factory ..... Nice ET's , some MT drag radials will put you in the 12's .....

moenoyze

YO eutu1984, I have a pair of drag radials mounted on C-4 wheels, also a complete D-36 with 373 gears. If I get my car finished I plan on Numidia friday night. My first time out with new combination. If U want call me or talk to me at the track.

Tom400CFI

While drag radial would certainly "fix the problem", better driving would do the same. That car has 12's in it, as is...it's the 2.3...+, 60's times that is killing the ET.

OP, fix your 60' time with practice and your ET's will come in line with your great looking trap speed. Any C4 'Vette should be able to 60' in the 2.00 realm, so that is a goal for you to pursue. Hit that (or better yet, a 1.9x) and you'll be in the 12's.


.

v8vette84

Stock TPI intake and heads?

Those parts choke out a stock L98. You left a LOT on the table keeping those parts untouched. I agree you need to get your 60' down.

You have an automatic, it shouldn't be too hard to keep the spinning under control. (Either that or your all seasons are super hard, which all seasons are a terrible choice to begin with)

Still not a bad run considering.

You just need more seat time!

v8vette84

So very true. I can get pretty consistent 1.9's in my 84' with a 6-speed on cheap 275 tires. It's all about "knowing" the car.

eutu1984

originally the car had 2.59's, a couple of years ago I picked up another dana 36 with 3.07's on FB cheap. over the winter I finally got around to putting in the 3.07, the car is an auto so it comes with dana 36 and with my budget and the way I mostly use the car I just as soon stay with it.

eutu1984

Cant make it Friday, Next time I will be going is in May for test and tune with the club (717 Street & Strip Club) and thats if I can get out of work. if I can one day I will hook with you at Numidia.

bjankuski

Nice runs, will run easy 12's if you can hook. Try rolling on the throttle lightly and then hitting it five feet out.

eutu1984

I built the motor on a budget, so I had to stay with the stock intake for now, I blended the seats and bowls then gasket matched the intake, then had the heads rebuilt with stainless steel valves, could have gotten a cheep pair of china heads for about the same but they seem to be working ok. https://drive.google.com/drive/folde...28?usp=sharing

eutu1984

I should go into my tune and change when my TCC locks up. here is a video of my best run.

Tom400CFI

Yeah, that might help a little.


Are you sure that you have a 3.07 gear? Damn, I think you passed the 1/8th in first gear! 2nd through the traps?

v8vette84

19-22 secs it really sounds like the car is having a hard time accelerating. It picks up before hand and right after but during that time the exhaust tone stays basically the same which to me says its not gaining much RPM. Just sounds off to me. It's 3-4 seconds of a VERY slight RPM increase...

It just sounds really weak out of the hole. Sounds like my car when it came out of the hole on the 3.07's, bogging. I changed to 3.73's. Also you don't have much wheelspin at all which is good.

eutu1984

100 percent sure took out the 2.59's and put in the 3.07's over the winter my problem I think is the TCC lock up I will have to go into the tune and change it. I data logged the last run when I have a chance I will post it. I may have to play with the govner in the trans also.

Buccaneer

Nice! I'm jealous as hell. I could only wish the track here would be empty for me to do what looked like maybe multiple passes. Also, I would be a huge supporter of using DRs as well. I run the newer MT ET Street R DRs, they hook great at 20lbs with my 383 and a 3.31 gear with a 3,200 stall. In somewhat bad air here in AZ, a 13.1/13.2 is common, but 12.90s is more common with my current setup which has been repeatable, but that will be changing soon. 60' of 1.85 should land you in the 12s. Did you by chance do any burnouts in the water with street tires? If so, don't do that and your 60' should improve.

I also noticed that right after shifting into 2nd there seems to be maybe a hiccup or maybe its an audio issue, I couldn't tell for sure. Was the motor tuned on a dyno after the 383 change? Like Tom said, you went the entire track using only two gears. I see a gear change in your future maybe.

Tom400CFI

I didn't hear it shift out of second...that means you went 108 mph in second gear...with TPI (under 6k RPM, I'm assuming?) Something doesn't make sense. I would double check that rear gear if it were my car. A decent gear would really help that car go. It already goes good...but I agree with v8vette84 that the thing is struggling out of the hole.








I think what you guys are hearing is the converter locking, right after the 1-2 shift.

That helps with efficiency, but the 1-2 is already such a huge ratio jump on a 700r4, I would probably try to change that behavior...like the OP originally mentioned he was considering.