well ive really noticed that my car really kind lacks on the top end, like once i hit 45mph it doesn't really pull hard, it will go on a flat part from 60 to 70 in like 5 seconds, but i dunno, hills are my worst enemy.

 

what could i do to help, help the engine breath better by better exhaust, 1 7/8's inch from the heads to a 2inch Y-pipe, to a cherrybomb to a 2 1/4inch tip. since my cat is rusted through badly i need exhaust anyways.

 

also port the intake, since i am rebuilding the hitachi soon also.

 

anything else you can think of??

Did this just happen after the drags at PIR? It could be your timing is off.

THe timing not being advanced enough would cause a lack in top end.

timing was mentioned

vacum leak

weak coil

crappy wires

 

rusty cat? umm maybe plugged as well that will kill top end

plugged airfilter

 

the fact you are rebuilding the hicrappy i would think maybe its leaning out?

i dunno bout the hitachi's don't they have a secondary type thing? maybe its not opening?

could it be that its a slow rump roast 80-90 HP car?:-p

timing is fine, its always been like this though,

 

i am running timing at about 18 to 20 advanced now and seems a little better.

 

and the cat is fine since i gutted it yesterday, no change since it was hallow.

When I saw the title of this thread, I thought maybe you were talking about some of my old girlfriends.

northguy, how old were your girlfriends? :grin: give them time! jk

 

scooby, I would do a larger exh, bottom end may be sacrificed a tad, but top end should benefit pretty well. A good intake is a must too...use mandrel bends wherever you can

Have you cut the bottom out of the airbox yet? it might help a bit.

And northguy, if she's under 18 its considered rape in many states

from the factory it came with a whole in the bottom of the airbox, sorry im bein an rump roast... its carb.

ya its just a low hp car. that glass pack will help, you can make a cold air intake with a mpfi snorkel, it clamps onto the top of the carb, then put a big rump roast cone filter on the end.