MOTOR STOPS PULLING

[NOVA383ROLLER]

I HAVE A 383 6'' H BEAM ROD,13.5.1 DIAMOND PISTON SOLID ROLLER COMP 12-772-8 CAM 286/292, Lift .576/.582,1.6 ROLLER ROCKERS HEADS ARE PRO TOPLINE 220 WITH 72CC 202-160,BTE POWER GLIDE 1.76 5000 B&M QUICK 60 CONVERTER 456GEARS TIRE 28X11.5X15 ET STREETS CAR RUN STRONG LEAVES OK 1.49 60 FOOT RUNS 6.90 IN THE EIGHT 10.90 QUATER ABOUT 300 FEET BEFORE THE 1/4 MILE TRAP CAR STOPS PULLING NEW TO THIS CAN ANYONE GIVE ME SOME ADVISE PLEASE 69 NOVA 3300 POUNDS WITH IN IT LEAVING WITH NO TRANS BRAKE. THANKS MARK GOOD FUEL PRESURE

[cepx111]

Since you mentioned it only does this in a 1/4 situation my first thought would be valve float due to over reving.

What are the RPM's at the stripe in the 1/4 vs the 1/8?

Also do you have jet extensions on the secondaries?

How much timing total timing are you running?

What type distributor / ignition?

A stock hei will play out at higher rpms.

[NOVA383ROLLER]

NO JET EXTIONS 38 DEGRES TIMING 7000RPM AT THE TRAPS MSD 85551 DIST 6AL SEEM LIKE MOTOR GETS REAL SMOTH WHEN IT STOPS PULLING

[cepx111]

I'd stick some secondary jet extensions in there first, it just might be the problem.

Under hard acceleration fuel wants to climb up the back of the fuel bowl. Jet extensions will help ensure that the secondary jets stay in fuel at all times, also make sure the float level is right at the bottom of the site plug, if you take out plug no fuel should come out but if you wiggle the car a tad, fuel should spill out easily.

I assume your using a single plane intake, what brand?

You may be at the max operating range of the cam and or intake.

Just a thought.

[NOVA383ROLLER]

HURRICANE POWER PLUS HOW BIG OF CAM COULD I GO IM THINKING OF GOING TO A DART INTAKE 220 , 750 DOMINATOR ? OR SOULD I STAY WITH WHAT I HAVE AND DO SOME CARB WORK THANK MARK

[cepx111]

No matter what route you go> definetly put the extensions in, $5 bucks anywhere is cheap insurance for that ailment.

IMO< I would move UP to a better higher flowing intake.
A Victor jr or a Team G would be much better choices.

I'm not a cam guy guru by any stretch of the imagination but your cam seems small to me, I'm thinking something in the 610's to 630 lift would be much better suited to your combo.

Cp

[JEFF69Z28]

I AM BY NO MEANS A TRANS GUY BUT, I WOULD TRY A TURBO 350,I TALKED TO A TECH AT ATI TRANSMISSION ABOUT A GLIDE AND HE TOLD ME I WAS NOT MAKING ENOUGH HP TO USE A GLIDE AND IT MIGHT HURT MY 1/4 MILE TIME AND MY CAR RUNS 10.30'S IN THE 1/4 WITH A TURBO 350
JUST MY 2 CENTS WORTH

[curtisreed]

What is happening is you are running out of camshaft. Here are the specs on that cam.

Operating Range: 2500-6500 RPM
Duration Advertised: 280° Intake / 286° Exhaust
Duration @ .050'' Lift: 242° Intake / 248° Exhaust
Valve Lift w/1.5 Rockers: .570'' Intake / .576'' Exhaust
Valve Setting: .016'' Intake / .018'' Exhaust
Lobe Separation Angle: 110°

With the small duration and 110° LSA and a 4.56gear w/28" tall tire a 383 has it's tongue hanging out by a 1000'. My motor does the same thing because my cam only has 248°/252° duration, 383, 4.88 w/33" tire. JMO.

Curtis

[hammertime]

I'd stick some secondary jet extensions in there first, it just might be the problem.


You may be at the max operating range of the cam

Just a thought.

x2 on jet ext

and x3 on the cam its prob just flat running out of cam

dont buy the you cant use a glide ...
note to self never call ATI because they are clueless by that statement above ..

[NOVA383ROLLER]

IM GOING TO CHANGE INTAKE ,AND SWAP CAM SOMEWHERE IN THE LOWER TO MID 600 LIFT THANKS ALOT.... MARK,CINCINNATI,OHIO

[DRTRCR22]

Not only the lift, but make sure your duration is good for at least 7200 rpm. I also agree with the Victor Jr., even a Super Victor...
Jim

[JimmySmith]

I use a Bullet 255-263 @.050 with .640 lift in my 360 and in my 388 and it does very good. Jet ext won't hurt a thing but my thoughts are it would show up right after the hit if it was going dry .also I would want the cam on 106 max and degree to 102 0r100 . Later J.Smith 4621 racing

[kwkracing]

Make sure your valve springs can handlle it.

Alot of proline heads ressemble stock gm heads.

Are you sure there 220 intake runner? I know the 170cc have 220 stamped in the head, it was part of the casting number at the factory and not the intake cc's

and they were 2.02 1.6 and 72cc

[chevynovaman]

I WOULD CHECK THE VALVE TO PISTON CLEARANCE WHEN YOU GET THEN NEW BIGGER CAM IN... GOOD LUCK...

[poboyracin]

I wouldn't worry about changing the intake, I've gone 10.60's with a box stock Hurricane on a 383.

You need a bigger cam. That cam is done way before 7000 rpm. Check out the Comp 12-908-9. It hauls a$$ in a engine such as yours. Specs are:

300 in/308 ex adv. duration
264 in/270 ex duration @ .050"
.630 in/.630 ex gross lift
106 lobe centers (I'd advance it 4 degrees)

[CamBirdRacing]

to much gear or to short of a tire.

[Pwmax]

I would agree. The cam is not big enough. Also, what fuel pump and system details do you have goin on? That was never metioned. The hurricane will make more power than the Victor Jr. The cam Poyboy recomends, is perfect. That cam would work very well. To mention it again, check piston to valve, installed height, and spring pressures, and coil bind for the springs. That could be part of the issue also, not enough valve spring.

Frank