Gene kerr

What kinda 1/4 mile times you think a 1970 442 with 3.23 posi 275/60/15 drag radials hooker headers 2300 stall 455 trw pistons comp XE274H cam performer intake 750 carb holley just a rough guess

BangScreech4-4-2

Turbo 400?

13.3 @ 106.

Gene kerr

yes th400 i would be happy with a 13 anything

BangScreech4-4-2

Would improve with a deeper gear/higher stall converter.

Gene kerr

How much stall and gear would you recommend

BangScreech4-4-2

I'm by no means an expert, but 2500-2800 for stall speed should get you off the line smartly without too much impact on drivability.

For gears, you'll be limited to what's available for your Type O rear. CO member @monzaz may be able to recommend something that will work for you.

Fun71

The good thing is all the aftermarket O-Type gears are made to fit the 3.23 series carrier.
The bad news is there are only 2 or 3 ratios available.

Gene kerr

im not gonna change it really i was just curious what it might run before i go whatever it runs is what it runs its a really clean car not perfect but really nice i think

no1oldsfan

I am not sure what altitude you are at. 13.3 quarter mile with a 3.23 sounds very optimistic.

Gene kerr

im in orlando Florida we are pretty much sea level

matt69olds

Nonsense. When I first started racing my car in high school (late 80s) I ran a bunch of 14 flat, occasionally dipping into the high 13s. This was with a 2.78 rear gear, worn out limited slip, and an early 70s low compression 455.

It will take some time and some experimenting but I’m sure low 13s would be pretty easy.

Gene kerr

If it runs 13s ill be totally happy

Rallye469

Have you scaled the car Gene?
A lot of this come down to weight.

Stock E heads?
Exhaust system?

Speed World Orlando is a good track but has a LOT of street cars showing up and dowsing the track with a bunch of contaminants.
Do you think it will hook? What tires?

fleming442

Should be 13s all day long, plenty of fun!

no1oldsfan

Hey I am all about Oldsmobile horsepower. 13.3 with a 3.23 rear? I owned plenty of 455 Oldsmobile powered cars. Never once was I close to a 13.3 with a 3.23 rear.
I am on your side. I hope your car runs great.

OLDSter Ralph

It all depends on how well everything is working together. First and foremost is.....will the tires hook up. Florida humidity and drag strip surface traction are also considerations. How far onto the 13's you get depends on all the above.

Bernhard

Go to the track and get a base line on the car, them tune your way to lower ET's.
[ Quote: from Ralph It all depends on how well everything is working together.]
I think 13's are possible if the car works well.

monzaz

12.80 1971 MONTE CARLO SS 454 10.5 TO 1 MOTOR 3.55 GEARS 2000 STALL
CAM IS A 272 HMV OLD HYDRAULIC FLAT TAPPET CAM.
performer 4 bbl 750 double pumper
msd 6al box and distributor
drag radial 255 60 15 about 19# pressure
3970# car power seat, tilt, buckets, console pw, pl, power trunk, full interior not race at all
700R4 trans
876 feet altitude Norwalk Race Park (Summit motorsports park now)
So you should be able to pull that off with your car.
Obviously a well prepped track and traction will be needed for best results.
Thank goodness for Mr Bader, his track is always well maintained .

DO REMEMBER THAT 455 OR ANY BIG BLOCK CUBIC MOTOR IS GOING TO MAKE TORQUE LOW. USE IT!!! do not put a rever cam in these torque monsters.
that is if you want as street-able vehicle no more than 280 advertised. 274 cam should be a stump puller you might need to bump the stall a tad more. with the 3.23.
you have 3 speeds to take this vehicle down a 1/4 mile...should be plenty.
Just my 2 cents.

Bernhard

Do you know what your rod bearing clearance is. The reason I ask is big blocks do not like rpm, correct rod and main bearing clearance is important when drag racing.

Gene kerr

mains .0037
​​​​​rds .003
high volume oil pump canton oil pan

KCTexan

I had a 68 HO from '90-'92, 455, Torker intake, Holley 750 DP, Crane High Intensity cam (288/.480 I think) "D" heads around 9:1, Hooker Super Comps, 400TH-3200 stall, 3.23 posi, N60 McCreary dirt track tires (pretty soft'n sticky). The car would run 13.50's all day long with my young, dumbass driving it. I didn't understand how to use the torque that motor would put down and insisted on shifting to 2nd at 6000 everytime. I thought I screwed up on the last run I ever made in that car and shifted to 2nd at about 5200...needless to say I was shocked when I got the time slip and ran a 13.23 @ 104! I didn't have time to make another run before the track closed and a week later I was T-boned and my car was totaled.

If it's running (tuned) well and you can get it to grab you should have no problem running in the 13 second range. Like suggested above...shift earlier than you think you should and use the torque...I just didn't know any better.

My brother had a 71 Supreme, 455, 750 DP, headers, 400TH factory stall and 3.08 peg leg and ran 14.7. We used to mess around and race each other all the time...from a standstill he didn't have much of a chance, but from a roll it was pretty much neck and neck.

69CSHC

High 13s on a good track with nice weather, and practice.

Stock is high 14s, Motor Trend April 1970 365 HP TH400 3.08 rear, SX. (14.8 @ 95mph)

Between the power mods, new stall, better gear, drag radials/modern track prep. 1 second off the original ET, is realistic in my opinion.

Your modifed engine combo is probably 400 hp gross but touching that additional HP. Is going to take a much better SLR. (Higher numerical gear...)

As is I'm figuring 13.8 @ 98 mph 4000 lbs test weight, with a solid pass. It takes 300 net hp to do that.

herkguy

I would concur with these.
I am running nearly that combo. 3:23 posi, Rochester 750, same (Cam, pistons) shorty headers into 2.5 exhaust with low restriction mufflers.
My E heads have been ported. And running roller rockers.
Just added Hughes BPO 25 hd converter but on a slightly tighter converter it really pulls top end.
I don’t have the sticky tires so my shortfall is traction. Once moving it has run 13.5-14 @ 103-107
on both Gtech and Draggy devices. So I have to believe with your tires and a solid launch (motor properly tuned)
you should easily hit 13 s

as noted above by Bernard and OLDSter, it has to be the whole package then Get it out and get a baseline and tune it from there. Sometimes small timing changes make a big plus.

sounds like some fun times to look forward to..

Bernhard

Nice
Look forward to seeing track time slips.

wr1970

I think my 1970 442 when I had a 323 grear in it before going to 355 went 13.70 . Mine weighed 3750 turbo 400 with a stall of 3600 455. So yeah I think 13 something is possible.

BangScreech4-4-2

That's a pretty high stall. How was it to live with on the street?

drjr56

1969 442 3850lbs with driver .030 over 400g motor Q-Jet-C-heads big valves,3 angle valve job. Performer manifold. HIT-282-2 HYD Cam.491/518 and 226/234@.050 TH400 with shift kit,and 2200 stall.373 posi,MSD Vacuum secondary 16*/ 36Total. Tires M&H Street/Strip 60/15...Hedman headers,2 chamber flowmasters...not great traction..shifting @5500 RPM's Car went 1.7/ 60ft 1/4ml 13.95@100mph.Atco Dragway N.J. Get used to the car,and with traction...13's should be no problem.....have fun!!

BangScreech4-4-2

That seems like a lot of cam for a small-bore long-stroke torquer like a 400G (might be better in a 455). I wonder if you might actually improve your times if you backed it off a little.

drjr56

BangScreech4-4-2...funny at the time it was early 90's,I thought duration was right,but it might have benefited with a little more lift. I learned that cams that size in motors with good heads,the right combo streeters and the right tune make enough hp/tq to run impressive 1/4 times.Guys on here build them all the time. My 455 has a hyd roller 538/538 236/244@.050 procomp/speedmaster heads....I'm hoping to see some 12's!

Koda

Is that what the Bithlo track is calling itself now? I remember getting into some argument with a forum groupie (yeah, there was such a thing) back when ROP was big and she was arguing with me that it was in Orlando, and I was like, honey, I've gutted deer within eyeshot of that track; I grew up there; the only thing Orlando about it may be the mailing address since Bithlo went bankrupt in like the 80s or so.

wr1970

Wasn't a problem at all . I used to drive it to the racetrack 30 miles one way. The other race track 45 miles one way.

Rallye469

Yeah Koda, it’s pretty far away from Orlando actually. Speed World? World of Speed?
Something like that. I’ve never heard of Bithlo.

Koda

Yeah, it's the Bithlo track. Seen here from google maps, Bithlo is unincorporated Orange County east of Orlando. Also known as the Nightmare Before Christmas (,FL as seen to the right.)

aqua67w30

I'll guess 14.80@100. You've probably never done a burnout, staged a car and launched a car off the tree. It takes driving skills, chassis tuning and engine tuning to maximize your combinations potential. Take it to the track and see what you can do.

major tom

530G in the window so you know there is no bench racing going on here.

This is my 68 ragtop. Raced with 8 track, power seat, PW, PS, Spare tire, jack...everything I could find to weigh the backend down. Still spun out with ET Drag tires. This is the 1/8th mile. 3:55 posi, TCI 400, Line locks, Mondello built 455, 11:1, aluminum head, Barry Grant demon. I broke out and lost and got booted for faster than 8 with a ragtop and no roll bar. Why do they make me put the top up?

OLDSter Ralph

Maybe you decipher the time slip for us ?

BangScreech4-4-2

Yes, and is there a formula for extrapolating 1/8 mile times to 1/4 mile times? Im old school and have no idea whether 7.9 @ 86 is good or not.

fleming442

http://www.wallaceracing.com/8th-quarter.php

12.54@107 1/4mi. That's about what my old 400G ran. Had the mph, just not the ET, story of my life.... Things are coming around.

Bernhard

Bernhard wrote:
Would you mind sharing some more details on your 400 G block that ran 12.54 @ 107 ?

fleming442

It went 13.3@107, but whatever. This was built with zero performance knowledge and a Mondildo ripoff. 0.030 over 400G, Comp XE268 cam, 1st gen Edelbrock heads with purple aluminum rockers, Performer intake, and Barry Grant mech secondary 750. It was built by JB Auto Machine in Rosedale, MD. I couldn't keep thrust bearings in it because of manual trans/auto crank issues. That's why it never got put back together.