Cam

[BLACK91]

What is the Largest cam I can install on my 91 without changing anything on the bottom end of the motor!

current mods:
cobra upper and lower
throttle body
3:55
full exhaust-equal length, h-pipe, and dynomax mufflers
springs
upper and lower control arms

[barronj]

What is the Largest cam I can install on my 91 without changing anything on the bottom end of the motor!

The cam that will work with your 3.55's/stock heads/retain driveability is the cam you want.

I vote for leaving the cam alone, given the rest of the combo, and just install some 1.6 roller rockers.

Spend the rest of the money on 3.90 gears, that'll wake it up.

[BLACK91]

Why the 1.6RR.......

[80coupe]

im running a e 303 with 1.7rr i like it, but i would stay 1.6 if you go with big cam

[BLACK91]

Any of u have time slips with these simple MODS?

[80coupe]

nope i just got done with mine it runs alright but i still need a new carb and stuff so havent been yet. but i would say i wouldnt go bigger then a f cam with 1.6 rr imo on a stock motor

[barronj]

Why the 1.6RR.......

Because you're currently running a sled/fulcrum design, and a roller fulcrum/roller tip rocker will free up horsepower by reducing friction.

A cam involved fluids, gaskets, cam, time... it adds up. On a set of stock heads, your limitations are in what a stock head can flow, not to mention what your purpose is with the car (daily? 1/8 mile only?).

I would save for heads & cam, do them together, and realize a full benefit.

EDIT: I take it all back, except for the part about the 3.90's, intsall those. Just drive it. You have the right mods. You're at a tipping point of perfect balance vs slippery slope.

[FoxBodyNick]

having the "largest" cam possible is not always the best idea. with too much duration, close LSA, and Lift you'll lose performance. try and match the cam you want to what your heads are and in my opinion the stock cam is pretty much what you want with stock heads.

[OMEGA DOOM]

I believe AFM had some great street cams if I remember correct the N41 was a great cam with the stock block? someone correct me if i'm wrong?

[PUSHROD]

I believe AFM had some great street cams if I remember correct the N41 was a great cam with the stock block? someone correct me if i'm wrong?

ur wrong, hahahaha

[FoxBodyNick]

lol correct. the n41 has too much duration for stock heads. the n41 is for TF heads, Eddie heads, and gt40s AFM says.

[thesource]

Bigger isn't better when it comes to camshafts. It might sound cool but thats about it. It will have terrible drivability, poor fuel milage and run like shit. Is the car a 5 speed or automatic?

If 5 speed, I would look at the B cam for a nice little pop and decent performance. Be sure to get new springs installed on the heads when swapping out the cam.

If auto, leave the factory cam and add some 1.7's to it unless you plan on replacing the torque convertor with a looser version.

[JETFAST]

any more then .540 lift .280 dur with a 1.6 and you are getting really close to having a p to v issue.

[DON SVO]

find a set of used heads, longtubes and an intake, decide what you want out of your combo, then get another cam.

[OMEGA DOOM]

lol correct. the n41 has too much duration for stock heads. the n41 is for TF heads, Eddie heads, and gt40s AFM says.

LOL it's been a few years!