lacking on top-end

[The Scooby]

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??

[Turbone]

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

[WJM]

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

[oddcomp]

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?

[calebz]

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

[The Scooby]

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.

[northguy]

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

[nutt7]

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

[WoodsWagon]

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

[The Scooby]

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

[archemitis]

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.