1/4 Mile Times - The 1947 - Present Chevrolet & GMC Truck Message Board Network

69Chevyman · 10-28-2002, 12:48 PM

Hey i am starting to work on my engine to get a lot more horsepower out of it and i was wondering what all of ya'll have run in the 1/4 mile and what you have in your engine so i can know what to expect and maybe some stuff to get. Thanks

Project1970 · 10-28-2002, 01:37 PM

Right on.

When I first started running my truck, I was running mid to high 17's. Of course, that was with the stock aircleaner, points ignition, and a stock engine aside from having a slightly hotter cam. It probably could've used a tuneup. (Engine is a 350 Chevy, tranny at the time was a THM400)

With some relatively minor stuff here and there (tuneups, ignition adjustments, launch technique and a nice huge open-element K&N) I got it down to about 16.5-16.6 in the quarter.

The biggest single improvement I did was switch it to HEI...I started running 16.2's and got a 2MPG increase. 83mph trap speeds, about a 4200lb as-ran weight; good for roughly 220hp.

Recently, I swapped out the THM400 for a 700R4, and redid the entire top end of the engine - new Vortec heads, Edelbrock Performer intake. I estimate I'm pushing about 250hp, with another nearly 30hp ready to be opened up when I dump the manifolds and the cheapo dual exhaust (according to Desktop Dyno).

With the 700R4 and Vortecs, I'm now running 15.9's at 85.5mph...and that's with screwed up shiftpoints. I can get the shifter into L2 so I can make the 2-3 shift at about 5200RPM where the cam falls on its face, but I haven't fiddled with it enough yet to get it into L1; the rather crucial 1-2 shift happens at about 4300RPM. It doesn't quite fall on its face when it hits 2nd (the torque curve is nice and wide on this engine) but I know it'd be doing a lot better if I could really wind it out in first. I figure I've got a 15.5 in this thing as it sits if I get the shifter issue straightened out.

What're your targets and what's your current setup?

Here's my setup...
Stock 1970 350 bottom end
Comp Cams 260H camshaft
GM Vortec L31 heads
Edelbrock Performer Vortec intake
Edelbrock #1901 Quadrajet 750CFM
Nameless aftermarket HEI
BIG open-element K&N

700R4 transmission with a mild-to-medium shiftkit, stock converter
3.73 open-style rearend
Yokohama Avid S/T 275/60TR15 rear tires

69Chevyman · 10-28-2002, 05:14 PM

Well my current setup is: Edelbrock Performer Intake Manifold, Edelbrock 750 carb, heads are off a dirt track car with oversized valves, K&N Filter, Stock Cam and everything else. And a mild shift kit in a 350 turbo tranny.

What i want to do is: Edelbrock Performer PRM Intake Manifold, 2500 Stall Converter, 292 Cam, and eventually Edelbrock matching heads

imaindianoutlaw · 10-28-2002, 06:06 PM

Project check your cam specs and get a converter to match it! Then you can use that cam to its highest potential! Stock converters suck

bigjimzlll · 10-28-2002, 07:18 PM

14.88 - 90 mph....355 with a 268H cam..750 carter..th350 with a 2600 stall and 3;73 posi....im putting in a solid cam and better exhaust...figure ill be in the 13s next summer

383 Stroker · 10-28-2002, 08:12 PM

All my times are 1/8 mile. 8.12 @85mph. It should run 12.70's in the 1/4 mile.

*Zkast* · 10-28-2002, 08:42 PM

With the engine in my signature, 350T and a 3:08 gears/no posi.
I ran a 14.8@98mph. 60' times absolutly sucked.
Haven't run it with the nitrous hooked up yet... maybe next year.
Just couldnt get the darn thing off the line with those gears.

Hey Stroker,
Did the track let you run your truck with that nitrous bottle behind the seat like that?

guitarman · 10-28-2002, 10:09 PM

12.41@111 with 4:88 gear

Project1970 · 10-28-2002, 10:34 PM

Quote:

Originally posted by imaindianoutlaw
Project check your cam specs and get a converter to match it! Then you can use that cam to its highest potential! Stock converters suck

A 260H is a pretty wussy cam, only 260deg advertised (212/212 at .050") duration and .440" total lift. The stock 'verter is fine with it, and should be with any cam I can put on stock Vortec heads (I like the look of the XE256H...)

383 Stroker · 10-28-2002, 10:35 PM

Zkast, yeah it's legal if you have a blow down tube.

*Zkast* · 10-28-2002, 11:05 PM

KCIR (kansascity track) said it had to be outside the cab in a encloser

I really want the bottle inside so its not out for everyone to mess with.

10-28-2002, 01:37 PM	#2
Project1970 14.1 @ 96MPH Join Date: Jul 2001 Location: Mesa, AZ Posts: 2,811	Right on. When I first started running my truck, I was running mid to high 17's. Of course, that was with the stock aircleaner, points ignition, and a stock engine aside from having a slightly hotter cam. It probably could've used a tuneup. (Engine is a 350 Chevy, tranny at the time was a THM400) With some relatively minor stuff here and there (tuneups, ignition adjustments, launch technique and a nice huge open-element K&N) I got it down to about 16.5-16.6 in the quarter. The biggest single improvement I did was switch it to HEI...I started running 16.2's and got a 2MPG increase. 83mph trap speeds, about a 4200lb as-ran weight; good for roughly 220hp. Recently, I swapped out the THM400 for a 700R4, and redid the entire top end of the engine - new Vortec heads, Edelbrock Performer intake. I estimate I'm pushing about 250hp, with another nearly 30hp ready to be opened up when I dump the manifolds and the cheapo dual exhaust (according to Desktop Dyno). With the 700R4 and Vortecs, I'm now running 15.9's at 85.5mph...and that's with screwed up shiftpoints. I can get the shifter into L2 so I can make the 2-3 shift at about 5200RPM where the cam falls on its face, but I haven't fiddled with it enough yet to get it into L1; the rather crucial 1-2 shift happens at about 4300RPM. It doesn't quite fall on its face when it hits 2nd (the torque curve is nice and wide on this engine) but I know it'd be doing a lot better if I could really wind it out in first. I figure I've got a 15.5 in this thing as it sits if I get the shifter issue straightened out. What're your targets and what's your current setup? Here's my setup... Stock 1970 350 bottom end Comp Cams 260H camshaft GM Vortec L31 heads Edelbrock Performer Vortec intake Edelbrock #1901 Quadrajet 750CFM Nameless aftermarket HEI BIG open-element K&N 700R4 transmission with a mild-to-medium shiftkit, stock converter 3.73 open-style rearend Yokohama Avid S/T 275/60TR15 rear tires __________________ Project1970 - LS1 Swap Complete!

10-28-2002, 05:14 PM	#3
69Chevyman Registered User Join Date: Mar 2002 Location: Tyler, Texas, USA Posts: 28	Well my current setup is: Edelbrock Performer Intake Manifold, Edelbrock 750 carb, heads are off a dirt track car with oversized valves, K&N Filter, Stock Cam and everything else. And a mild shift kit in a 350 turbo tranny. What i want to do is: Edelbrock Performer PRM Intake Manifold, 2500 Stall Converter, 292 Cam, and eventually Edelbrock matching heads __________________ 1969 CST Black w/Black interior, dual Flowmaster turndowns, 4-6x9s in the doors, Sony Explod cd player, American Racing wheels w/275's, Edelbrock Intake, Edelbrock 750 carb

10-28-2002, 06:06 PM	#4
imaindianoutlaw GMC SHORT FLEET F/S Join Date: Jun 2000 Location: SOUTH WILLIAMSPORT PENNSYLVANNIA Posts: 2,117	Project check your cam specs and get a converter to match it! Then you can use that cam to its highest potential! Stock converters suck __________________ CHARLES WADE HEIN HVACR FOREMAN. LEWISBURG U.S.P.

10-28-2002, 07:18 PM	#5
bigjimzlll Senior Member Join Date: Dec 2001 Location: Redding,CA...USA Posts: 4,736	14.88 - 90 mph....355 with a 268H cam..750 carter..th350 with a 2600 stall and 3;73 posi....im putting in a solid cam and better exhaust...figure ill be in the 13s next summer __________________ It's called "drag racing" if they called it "tic..tic..WHAM!..BANG! F*&K!!!", they'd have to keep the magazines under the counter with the other men's publications click the clicky to join the site.... http://67-72chevytrucks.com/vboard/payments.php 67 lwb..first hotrod in 25 years..540 best ET is 9.45 @ 141.44 Anderson,CA

10-28-2002, 08:12 PM	#6
383 Stroker Registered User Join Date: Aug 2001 Location: Jesup, GA Posts: 571	All my times are 1/8 mile. 8.12 @85mph. It should run 12.70's in the 1/4 mile. __________________ Video's of my Truck Racing 1967 C-10, 383ci Sbc, TH350, 3200 stall, 3.73 gear

10-28-2002, 12:48 PM	#1
69Chevyman Registered User Join Date: Mar 2002 Location: Tyler, Texas, USA Posts: 28	1/4 Mile Times Hey i am starting to work on my engine to get a lot more horsepower out of it and i was wondering what all of ya'll have run in the 1/4 mile and what you have in your engine so i can know what to expect and maybe some stuff to get. Thanks __________________ 1969 CST Black w/Black interior, dual Flowmaster turndowns, 4-6x9s in the doors, Sony Explod cd player, American Racing wheels w/275's, Edelbrock Intake, Edelbrock 750 carb

10-28-2002, 08:42 PM	#7
Zkast Account Suspended Join Date: May 2002 Location: Olathe, Kansas Posts: 929	With the engine in my signature, 350T and a 3:08 gears/no posi. I ran a 14.8@98mph. 60' times absolutly sucked. Haven't run it with the nitrous hooked up yet... maybe next year. Just couldnt get the darn thing off the line with those gears. Hey Stroker, Did the track let you run your truck with that nitrous bottle behind the seat like that?

10-28-2002, 10:09 PM	#8
guitarman Do it well or don't do it Join Date: Apr 2002 Location: Georgia Posts: 457	12.41@111 with 4:88 gear __________________ Try to be the person your dog thinks you are. Excellent paint and body site: http://www.autobody101.com/ Visit my Web Site http://home.attbi.com/~agfosteriii

10-28-2002, 10:35 PM	#10
383 Stroker Registered User Join Date: Aug 2001 Location: Jesup, GA Posts: 571	Zkast, yeah it's legal if you have a blow down tube. __________________ Video's of my Truck Racing 1967 C-10, 383ci Sbc, TH350, 3200 stall, 3.73 gear

10-28-2002, 11:05 PM	#11
Zkast Account Suspended Join Date: May 2002 Location: Olathe, Kansas Posts: 929	KCIR (kansascity track) said it had to be outside the cab in a encloser I really want the bottle inside so its not out for everyone to mess with.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.