Just wondering what kind of bolt on ETs a thirdgen can run. Excluding the LC2 cars, with a stock long block, and using TPI what kind of times can one of these cars run. Im assuming somewhere in the 12s, but some kind of info would be cool to see!

 

25mustang, what kind of bolt ons do u have on ur car. My friend has an 91 convert that has been mildly modified. His engine is has been rebuilt w/ mild cam, headers, full exaust, and 3.73 gears and from a dead stop he was there next to me till the beginning of third where i started to pull him hard. I finish the 1/4 mile in the middle of 3rd.

 

Im running 13.5 with stock heads, and cam. If I got the right combo im sure id be in the mid 12's.

 

with a stock L98 long block.. hmmm. Without mods to the tpi system (porting, bigger runners, base, etc) it's gonna be really really rpm limited. I'd say the best you could look for is maybe a 103 trap. If you can mod the tpi you could see a bit more.

L98s had a weak cam, poor heads and the worst fuel injection system ever put on a "performance" engine. They're handicapped from the factory lol

 

Stock '83 Z28 with factory 5-spd and 3.73 gears

Stock '79 Z28 350" engine, with 1-5/8 shorty headers, 3" Hooker catback, Torker intake and Holley 750 VS.
14.63 @ 95mph

 

GTA matt has probably the most impressive one i've seen so far. Stock heads/cam/intake L98 automatic car and he ran a 13.15

 

Did you SEE it. Or did he tell you?

 

I have always wanted to try it out, but the thirdgens worth using (stock cars in good shape) are fetching a lot of money! I wouldnt mind seeing how deep 12s it could go (I think it could with the right stuff) even with the crap cam and intake.

 

does it have to be tpi?

i slapped together a spare motor using a stock 1984 lg4 long block w/ 156k(never even took the valve covers off).

this is a full "bolt on" motor though cause it has all of the stuff from my 360 while i'm reworking it. hedman longtubes, holley 600, torker II intake (i had the carb and intake just sitting around, would not be my first choice, though i knew my worked over 750 double pumper wouldn't be good on a stock 305.), dual exhaust, built 700r4 w/ 4000stall 10" ATI converter, 4.10 gears.

this thing has no problem lighting up the 275/60/15 m/t et street radials with lca relocation brackets that i have on the street....i'm very interested to see what it would do if i took it to the track....i'd guess in the high 13 range...

 

Leaving out the LC2 just isnt fair But I can tell you what my 89 GTA did when it was still stock. An L98/A4 car it had hedman headers, flowmaster replcement muffler, air foil, K&N stock replacement filter, shift kit, little bump in timing, and drag radials. It went 13.701 @ 98.74 w/1.82 60ft. I eventually did other things like SLP runners, roller rockers, and ported plenum but never bettered the 13.70(equaled it many times though)till I hit it with a small wet shot. Went 13.052 @ 105.35 w/1.81 60ft trans slipping all the way. With a good trans I would expect it to have gone in the 12.60-12.80 range at maybe 106-107mph. I was very impressed how it ran with what I consider minimal mods.

My car was a heavy GTA. Now a lighter Formula with a little more intake and exhaust work, some converter, 3.42-3.73 gears, and 26" ET Streets or ET Drags to get out of the hole and I think you could see some impressive times.

89IrocZ350TPI - whats done to your car? And whats done to GTA matt car? 13.15 is impressive, just curious on the combo's.

Now I gotta throw this in... my old stock TTA went 11.99 @ 112.95 w/1.63 60ft with a K&N, dump pipe, $25 thrasher chip, ET Streets, and some 112 octane fuel. Woulda gone quicker if the converter wasnt fried(wouldnt lock up). Thats why the L98 came out of my GTA

Steve

 

No i didn't SEE it, but he posted videos of it, but i'm not gonna doubt the guy....

 

I ran 13.5 at 99 with Cat back exhaust,Headers,Ported intake manifold,Ported high flow runners,ported plenum,air foil in tb,tb bypass,afpr,hypertech chip,160 thermo,gutted air box,K&N's,msd ignition,cut of the fins on the maf,beefed up the alternator,re-maped injectors, got some good tires and 3.42 gears.

 

13.21@104.63 STOCK HEADS & CAM N/A
see sig for mods

 

13.9@98 1.9 '60

TPiS Airfoil, descreened maf, k&n filter, metco lca's, A/C and a.i.r. delete, Slp 1 3/4 shorties, Flowmaster catback, transgo shiftkit.

 

stock heads, cam and lower half
13.23 @102
seen by fellow tgo members


MODS:
Intake set-up- slp cold air intake, bbk twin 52mm throttle body, ported and siamesed plenum, as&m semi siamesed runners, tpis bigmouth manifold.

Exhaust- heddman long tubes into h-pipe through moroso spiral core race mufflers.

Fuel- adjustable fuel pressure regulator, high pressure pump.

Cooling system- griffin aluminum radiator, stainless hoses, custom fit billit t-stat housing, csi electric waterpump,

Ignition- accel 300+ ignition, accel coil, msd pro-billit distributer, msd wires, accel shorty plugs.

http://www.cardomain.com/rides
search by member id (mean57)

 

every single mod on my car has been bolted on/in...

 

13.2@102? holy launch batman, what was your 60?

 

consistant 1.79-1.80

 

oh yeah, no foot braking launch off idle and hit vette convertor.

i'm thinking about getting a 2800 stall this year.

 

mine is a 89 L98 with just headers/catback... and gutted airbox

2800 stall and 3.27 gears.

ran 13.98 at 100.9mph. 60 was 1.93 on that run. i have gone 1.88 60 foot and 13.89 at 97 with the old 2.77 gears. i have alot more left in it. especially if i had some slicks or drag radials

 

..Someone on here is running a HUGELY ported TPI with "slp runners" trickflow heads, cam and runs mid-high 12s. I doubt you can break into the 12s with stock head and cam.

 

sorry, a--h---e brother posted about a bet. I edited for that purpose. again sorry to whomever read this original reply.

 

haha i'll run low 12s or die trying. with a carb though!

 

I think you can, it's just a matter of maximizing your combo and wearing slicks. I don't think you'd get faster than a 12.8 at best though. Might even have to lighten the car.

 

pretty sure i'll be runnin in the high 12's this year.
i just got some injectors, 2800 stall and a lighter drive shaft.
oh yeah almost forgot good dyno tune session scheduled for it to. it has never been tuned just bolted the stuff on.

 

i need more traction and a good shifting tranny, and hope to see 13.4's this year.

- Best time (3/19/04): 60 foot 1.874 1/8 8.749 mph 77.48 1/4 13.757 mph 98.87

 

Man now I wish I had a disposable income. I would love to take up that 12 second challenge. Grab an L98 car, do all the bolt ons (stock long block, no power adders), suspension, sticky tires, and a TKO 600 in it! Launch it off the moon, bang some gears, and try for 12s!

So let me ask this question than, what would you guys do to go 12s on a stock motored L98? Tell me if this sounds good and what youd add to it! Also are the MAF or SD cars faster?

-TB
-Some kind of ram air
-long tubes
-Custom off road X-pipe (ground clearance will suck, but power wont)
-Custom catback (Straight through mufflers)
-pulleys
-Dump AC and smog
-Al. rad, driveshaft, battery out back
-Suspension (this could be key, especially if the car was a stick)
-TKO 600, good clutch, Al. flywheel (not sure about that with the low revving TPI, and a good shifter)
-Whatever rear end you guys recommend, and maybe a 3.42 gear

My thougts are that kind of combo, with slicks and skinnies, and that car would run 12s! Its something I would LOVE to do, but the cars around me are fetching a good deal of money if they are in nice shape! Anyone want to build this, see what it will do!

 

Bigger TB maybe, the stock intake on a camaro is an EXCELLENT one (gut it and give it K&Ns), long tubes with a cutout, pulleys yes, dump everything under the hood you can. Tune the car with a prom chip too.

Suspension would be a huge factor. That's going to be the key to hitting a 12 second pass. IT MUST STICK!!! That means slicks/skinnies, springs, shocks, LCAs, relocs, SFCs, take off the front swaybar.

The T-5 that comes with thirdgens can handle an L98 without problems, just get a good clutch and a good short throw shifter. Or get a built 700R4/TH350 with a 2500 stall.

As far as rear gears go I wouldn't recommend anything over 3.42s for a street TPI car. However since this is a theoretical strip only car I'd say 3.73s have the best chance. I think they'll give you a TINY bit more over 3.42s even with the powerband revving up faster. But it's really a close call. Don't even think about 4.10s lol! Definetly needs a posi too

 

What he said.

And then sum.

 

Nice input, things I didnt know about the cars.

As for the tranny, I wouldnt even look into an auto, the car would get a standard as job number one. The 3.73s would most likely go in if they were the best gear whether street friendly or not, and I dont think Id run a cutout, but full exhaust (I guess thats just personal preferance)!

The suspension is usually what makes or breaks a car, and Im sure there are combos out there that will dead hook!

Now if only someone out there wanted to try this. I would in a second if I had the means, and the funds, but I am in the process of getting my car just right! Come on Fbody guys, lets do this!

 

We argue on one forum and agree in another haha

These cars especially will make and break on that 60 foot, most of their power is made there haha

I'm sure someone has tried this, I hope they post up to let us know.

 

I'm pretty close to breaking into the 12's. My best pass over 2 years ago was 13.21@104.63( with poor track prep.) w/ STOCK HEADS/CAM - NO POWER ADDER. Since then I did afew more mods and have afew more planned for this Spring. My biggest problem is that the last 1/4 mile track on Long Island NY closed 2 years ago. Now i'll have to drive through New York City into New Jersey to get to the closest track......

 

Yeah thats the way the world works, one second you agree another you disagree...

I have to drive to Jersey more or less to run as well, so I feel your pain!

 

Someone else looks like they have done similar...

my 88 iroc had
3.27 rear
eagle 203 17x9.5/bfg comp ta's 285/40/17
jegster tq arm
poly mount(tranny)
t5 world class,autozone clutch
alum.driveshaft
88 5.7L(worst year,peanut cam)
crank pulley
headman shorties w/air tubes
2.5" y-pipe
slp muffler
cut out air box w/k&ns
timing @12*(no chip)
modded maf(smoothed fins)
all this @2400'altitude 90* out 13.77 @104 1.90 60'(1600 rpm launch)this same set up ran 13.05 @107 at HRP so if you dont 60'like my old car did low 13s are not in your future

I guess bolt ons are good for 107 mph with a weak cam, and TPI. And all you guys complain about top end...

 

^ thats pretty darn quick for a bolt on L98 running stock cam. most i could see with 1.6 ratio rockers and mild weight reduction is 104-105.

more weight loss and i can see some good times maybe. high 12s isnt out of reach. especially if you get a real trans in there like a manual or a th350. better gear ratios will help alot

lightly gutted car for a weight of 3400lbs with driver... Th350 trans/shift kit/3000 stall, full bolt on TPI with 3.42/3.73 gears. 1.6 rockers, longtubes/fuel pressure regulator and good tune to match the combo.. and it should do high 12's on slicks easy. should trap near 105. thats good for 12's easy

 

104 would be enough to hit 12s though. just BARELY but enough.

 

Why is 88 the worst year? 5.7 didnt have a peanut cam I dont think.

 

always heard 86 had the peanut cam

 

Ya the 86 305tpi got the lg4 cam. That droped hp by 25 to 190. No L98 ever had a peanut cam.

 

the 87-88s did have the 9th cold start injector but i dont think that hurts anything

they did have different ECM's tho i do believe. i believe if your gonna do a MAF sensor car... you want the 89 cuz its computer is better, as in more programing capabilities. i thought i read this somewhere on here.. i'll have to look that up to be sure

 

Last year my car ran a 14.3@95.8ish (Temp was in the high 80's) with just headers, y pipe, and K&N's. Stock catback with an 80 series muffler. Stock 2.77 Posi rear also. I have to do some free mods too, like timing and gutting my air boxes.


Some of the mods listed on my webpage are sitting in my room. They will go on this year though.

 

Thats pretty good. Should hit high 13's soon.

 

best 1/4 mile ever on 10/8/05 in 30* weather
with lots of ice on the plenum.
13.851 sec @ 98.060 mph

Most current best 1/4 @ KCIR 5/12/06
temp 68* barameter 28.78 & steady with 23% humidity
13.975 sec @ 97.43 mph

140,000 miles on a 1991 B4C Camaro
Mostly stock L98 350 TPI 700R4 trans & 3.23 rear gears.
Jet tpi air foil,
K & N air filters,
gutted air boxes,
throttle body coolant bypass,
160 t-stat,
relocated MAT,
MSD blaster coil,
March pulleys(#4405 steel alt & crank),
Edelbrock ceramic TES headers,
Catco dual cat replacements,
3" Flowmaster American Thunder Catback,
Empire Inland aluminum driveshaft,
Meziere electric water pump,
Goodyear Ultra HP tires on stock wheels.

 

My bolt-on L98 (with 1.6 roller rockers) ran 13.6 @ 102.8 mph, considering buying a new intake manifold for it and SLP runners but not sure about how much it will actually help me.