B303 and cobra rockers

tbird187 · Jan 9, 2004

I got a friend who recomended for me to get a b303 cam and cobra rockers... what lift would this give me??? would it save money just to buy a f303 cam, would I need to get the pistons flycut with the b303 combo????

1BAD89GT · Jan 9, 2004

tbird187 said:
I got a friend who recomended for me to get a b303 cam and cobra rockers... what lift would this give me??? would it save money just to buy a f303 cam, would I need to get the pistons flycut with the b303 combo????

B-cam on 1.72 cobra roller rockers:226/226 duration .526/.526 lift.have your heads ever been milled?has your block ever been decked?need more info about the motor....Tolerances are very close on a stock 302

tbird187 · Jan 9, 2004

wow i didnt know it would give it that much more lift, from .480 to .526 also didnt know it would change the duration from 224 to 226, anyway the block is a 88 or 89 has 80k on it and has never been messed with...... I will have the heads off to put new head gaskets is there a good way to check clearance???

SwAmPf0x · Jan 9, 2004

B cam is 224/224 @ .050.... .510" lift with 1.7's

I have no problems running that combo, except some slightly lower ET's than I should have lol

cougar5.0 · Jan 9, 2004

.526,I don't know everyone I have talk to says .510 maybe .512. Sorry I can't see .526. This might help you,take your cam lift .480(B cam) divide it by your stock rocker arm 1.6 this = .3000,then times this # by your new rockerarm of 1.7 = .510. If you times it by 1.72 it = .516.
Hope this helps.

tbird187 · Jan 9, 2004

so would this basically be an f303 cam? wuld it save money jsut to buy the f303 I just dont want to have to flycut the pistons....

cougar5.0 · Jan 9, 2004

Close to the Fcam, i am not sure how much the duration changes.

SwAmPf0x · Jan 9, 2004

Duration will not change, duration and lift might look the same as the F, but the valve events are totally different

red302 · Jan 9, 2004

I run the B303 with 1.72 Motorsport rockers...should put the lift @ about .514
Going from 1.6 to the 1.72 ratio should add somewhere between .030" - .035" of lift.

speed1972 · Jan 9, 2004

so it works without any other modifications? My concern has always been coil bind more than anything.... Is it an issue with this setup?

90mustangGT · Jan 9, 2004

I have that combo, I run the B cam with Cobra/Crane 1.7RR's which gives me 224/224 durration and .510/.510 lift, I also have it advanced 2*, has good bottom end but really kicks in at 4000rpm and up.

The would highly recomend a valve spring upgrade. Stock springs arn't any good above .500 lift and even with stock lift they valve float easy. I know a guy that was running the F cam on stock springs, last week a valve spring broke and destroyed his engine. I have double valve springs and have no valve float even at the lev limiter.

red302 · Jan 10, 2004

That's correct. The stock springs wont last long, if at all at that lift. I ran the cam and rockers with the stock heads at first, but upgraded the stock heads with a Crane valve spring kit 2 weeks later because of valve float. I put Edelbrock heads on the car a couple of years ago, and still have the same cam and rockers. It's a pretty good combination for a carbureted 5spd car.

1BAD89GT · Jan 10, 2004

SwAmPf0x said:
B cam is 224/224 @ .050.... .510" lift with 1.7's

I have no problems running that combo, except some slightly lower ET's than I should have lol

Yeah swamp is right i dunno where i came up with .526 /.526 been playing with to many cams lately

B303 and cobra rockers

tbird187

1BAD89GT

New Member

tbird187

SwAmPf0x

cougar5.0

tbird187

cougar5.0

SwAmPf0x

red302

speed1972

90mustangGT

I felt sorry for girls because

red302

1BAD89GT

New Member

Similar threads

B303 and cobra rockers

New Member

I felt sorry for girls because

New Member

Similar threads

Privacy & Transparency

Privacy & Transparency