Larry Dunlap

Yes, it is possible. When I say stock, I mean the motor itself. Ive done pretty much all the intake and exaust mods that can be done, but the motor itself has not been gone into. Here is a summary of my time slips from last Sunday at Lonestar Motorsports Park near Houston,Texas. The last line is the averages of the prevous 4 runs.

The first run was the second of two test and tune runs. I eliminated the first from the statistics as I shifted from first to third with the TH350 accidentally(still ran 13.3). Ive got to get a ratchet shifter, always get more excited on the first run.

The rest of the runs were in a bracket elimination with a 13.0 dial in. Note run number 2 is pretty close to perfect ET with a pretty good reaction time. I actually lost the third run to a faster car that timed his run just right.

Then on the last run I thought I won. I got handed the loser yellow time slip and I was confused, thought I red lighted. The girl said no, you broke out. Yess!!!. I felt 10000 times better running my first run in the 12s than winning that loser bracket bracket race.

Mods since last outing, remove cats and install cutout, AC delete, increase fuel pressure from 41 to 45, cool weather. Approximately .4 better than previous best.

Reaction 60' 330' 1/8et 1/8mph 1000' 1/4et 1/4mph
0.0107 1.8126 5.3293 8.3018 82.37 10.8777 13.0619 103.19
0.0976 1.809 5.3143 8.2765 82.75 10.838 13.0087 103.76
0.0511 1.7988 4.3496 8.3424 81.54 10.935 13.1427 102.97
0.3153 1.7935 5.3001 8.2626 82.75 10.8254 12.9971 103.76
0.118675 1.803475 5.073325 8.295825 82.3525 10.8691 13.0526 103.42

Trevor86TA

Congrats. What do you have for a converter?

Larry Dunlap

Ah yes, very astute question. I just realized I don't have that in my sig. Continental 2800 stall.

Thanks.

Blu91Z28

Congrats Larry! Nice times!!!

zz4monte

Good work. Those are great times!!!!!

billy050302

Hello I am trying to increase my potential in my Z28 I also have a stock 350 in my car and I was getting ready a rear end change over could you give me some prices on the posi unit and the gears. And one more question does the MSD kit help with your response a great deal or just a small amount

MdFormula350

great times / mph!

sometime soon I need to get some real racing rims, lower some more weight, and then go for the magic 12.9999999

urbanhunter44

iTrader: (3)

Very, very cool. That's a TPI induction motor right with stock heads/cam?

We had a lot of discussion on the board as to whether it could be done and you are in a VERY small group that has actually managed to do it. Most people get fed up and rip off the TPI

Excellent slips, I think everyone is proud of that L98 haha

Oh, what was the race weight and DA?

Orr89RocZ

iTrader: (20)

looks good but your only pulling 1.80 60 foots with that converter and gear and those mods?

i'm at 1.74 with 2800 stall and 3.42's with stock L98 with exhaust

lilbowilson

iTrader: (2)

Technically he did rip off the TPI and put on a super ram intake. I wonder if it could be done with the stock intake also?

GTA matt

iTrader: (1)

I went 12.93 with the stock plenum, manifold, and runners......

Larry Dunlap

I have the stock rear end. I think a Moser rear end is like $2000 but the stock should be good for me now unless I put nitrous on the car, which I am thinking about.

I only have the MSD coil, the rest of the ignition is stock. Ive heard that you don't get a lot of help from an ignition kit.
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I was surprised at the weight difference between the stock rims and the Weld Prostars, a definite help.

TPI-Formula350-

hey Matt, when did you hear the issue of GM High Mag with our cars is coming out? Last I heard it will be April of 07. Kinda funny they had us run Aug 1, in 104 degress for a April issue.

Larry Dunlap

I did not weigh the car, but based on what I have in (and out) of the car I would guess around 3200 lbs.

what is DA? Driver attitude?
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Wow, I thought the 1.8s were good, I just recently got into the 1.8x 60's. Maybe the guy I got the converter from misrepresented it or something. Im not spinning at all and am launching by footbraking, bringing rpms up to 2400 or so, then mashing it.
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The superram made a big difference over even the Edelbrock ported runners I had on, which made some difference over the stock setup.

Wheel Spin

Don't sell yourself short on the weight there Larry. Your car pulls very well. I average 3650# race weight, 1/2 tank gas and my 185# butt in the seat. Will have to see what the new scales at HRP say. You've dropped the 700r4 for the 350, and maybe the rear seats out? A/C delete? Still probably not more than 250# less than me?

Larry Dunlap

YOu are probably right, I haven't weighed my car since one time at HRP. I thought I remembered like 3400 or 3500. Since then Ive gone to Weld pro stars, remove back seats, AC delete. I should weight again.

Orr89RocZ

iTrader: (20)

whats all done suspension wise?

oh and with your Th350, you dont have as steep a first gear like the 700r4. thats probly a reason

Larry Dunlap

Only suspension mods are Spohn adjustable torque arm and Th350 Crossmember. Its a Formula and does have the WS6 suspension package. Ive been thinking about Lower Control arms and relocation brackets, do you think that would help?

Orr89RocZ

iTrader: (20)

i have pretty much every bolt on except aftermarket sway bars cuz the Irocz bars are huge as is. i have adjustable shocks which i believe is very beneficial. helps transfer power to the rear. i got the front set softest while the rear is 4/5 stiff. a good setup for drag but when on the street, i run everything stiff. you just cant beat adjustability.

the control arms are nice to have but relocation brackets are whats really effective. lowering those control arms does help traction. my car needs brackets now since i swapped in a different rear end. my last 1.754 60 the tires chirped alittle on launch because the LCA angle is way off. i got low 1.7's in it for sure by adjusting those down some

i believe you'll gain a good bit of time off your 60 foots with the arms/brackets and a good set of drag shocks or adjustable shocks. that will help the launch. it did my car, because on stiffer settings the car didnt plant well...not gettin good tranfser to the rear. you need light shocks up front and moderately stiff in the rear to get transfer of weight without the haunchin down effects

oh and for what its worth... my best 60's happen when i fullly brake stall the car and bring up the rpms as high as i can go before the car starts to break loose.

urbanhunter44

iTrader: (3)

oh, you did remove the TPI. Still impressive

DA is density altitude. What's your height?

GTA matt

iTrader: (1)

I talked to Scott, he said it would be the April issue, which may be out in january.

Larry Dunlap

Well I thought I would update this thread. I havent been to the track since November when I started this. Went yesterday on a nice cool day like upper 40s lower 50s. Here is the results

first 60' - 1.7376 (like .14 better than best ever)
1/8 - 8.104 , way better than best ever, like .4
1/4 - 12.7828, killed my previous best of 12.998
mph - 104.75
This was a race with a viper truck, he ran a 13.3 but with 106 mph, finally got it moving

second - 60' - 1.7731
1/8 - 8.187
1/4 - 12.8874
mph - 104.34
I ran the same first 1/8 almost, but the second 1/8 sucked, felt like I shifted to soon, and the car ran out of power at the top end.

Pretty Cool!!!!!

WH_86IROC

I HAVE A STOCK TPI 350 AND THE ONLY WAY IT GOT INTO THE 12'S WAS ON A NX WET KIT 150 SHOT? JUST WONDERIN WHAT YOU HAVE DONE TO THE CAR BOLT ON WISE?

Orr89RocZ

iTrader: (20)

thats alittle more like it! L98 cars love to leave the line.

Larry Dunlap

It is all in the sig at the beginning of this post, but pretty much every bolt on possible. I think that the combination just works well together. The Superram intake, the 1 5/8" headers, 3" Borla catback (no cats and cutout), TH350 transmission, 3.73 gears, and the Hoosier Drag radials, all being the most significant factors.

Heck, with a 150 shot of nitrous I might be in the 11s!!!

strokeronthesause

91z28 bone stock!!!! no hedders no cat back no runners no nothing....063 jet on a shark nozzle 12.4@108.8 1.68 60ft on 16inch et streets 6 years ago....

Orr89RocZ

iTrader: (20)

how much of a shot? 200?

strokeronthesause

.063 jet=150 shot

Bob Cosby

Larry, Matt, and anyone else that has gone into the 12s with a 'bolt-on' 3rd Gen (non TTA).....BIG CONGRATS! I've often thought it could be done, but haven't kept up with the quest, and lost track several years ago. Fast forward to a recent Fox body vs 3rd Gen arguement started on an internet forum a couple of days ago, and I figured I'd check on the latest and greatest in the world of 3rd Gens. I then stumbled across this post.

I've always been interested in stockish racing, having run my first 'bolt-on' 12 in my 88 Mustang Coupe back in April of 1989. Please understand that I'm no hater - just a fellow enthusiast and competitor. Also a former 85 Z28 owner.

Best of luck to you guys.

car_fixer

hey we bolted a bunch of stuff on a 350....ran a 9.99 on the limiter from 1000 ft but it is still a stock block crank rods and flexplate at the time (sfi approved on there now) lol what is stock?

Larry Dunlap

Thanks, same to you. I wasnt' sure it was possible for a while either, without nitrous. The thing that put me over the top was removing the cats and running a cutout. I went out since it got warm again and ran like 13.0s, so love that cold weather. Mighth have to do something else to run 12s in the summer, mayber race gas?

Bob Cosby

Nah, race gas won't do you any good on a low compression motor. More heat/humidity means less dense air which means less power. You can make up for a tiny bit of it with tuning, but weather is huge, and there's little you can do but wait for fall.

Bob