Twilight child


Any tranny is gonna eat up hp, I wouldn't worry about it, you wouldn't see an improvement going with the ZF, as far as, minimizing drivetrain loss.



Andym


Good point...don't forget they put a variation of the mazda in the rangers along with the f-150's, production didn't stop with the 96 models either, I know they put them behind the 4.2/4.6 up to at least 2003 I believe, along with the rangers, thats a lotta transmissions. Ah, my point is I believe this sucker is a lot stronger than people give it credit for. Who knows?

 

IIRC, the 260 is a single pattern grind that's 260 degrees on the seat, 212@0.050, and 0.447 lift on a 110 LSA.

The intake side of the 260/272 is 260 on the seat, 204@0.050, and 0.458 lift. The exhaust side is 272/216/0.487. I don't know what the LSA of this cam is.

The Comp doesn't have as much lift as the Crane, but it's duration at 0.050 is higher, so it has a higher valve acceleration and will probably make more top end. It's been my experience that the seat duration heavily influences the low end characteristics and the 0.050 duration heavily influences the top end. The extra lift of the Crane probably doesn't help matters much, but it might be a little better.

On the exhaust side is where things really don't match. The Crane opens the exhuast valve 69 degrees before bottom dead center. On a higher rpm engine this wouldn't matter, but at low speeds that might let the cylinder blow down a little early and hurt torque. On naturally aspirated engines I've never been a big fan of dual pattern cams. They are nothing but a crutch for mismatched intake and exhuast components.

The difference between the two cams is probably very slight with a stock head.

I would not go to 1.73 rockers with your cam. On the Comp they increase lift to 0.483 and will also increase the duration at 0.050 by 2 or 3 degrees, which means the valve opening rate is increased. On the Crane they would increase the lift on the intake valve to 0.495, and the exhaust to 0.525. That is getting into lift ranges that are best left to sportier engines. They will probably require head work to accomodate the additional lift, as well as valvesprings that will probably not be friendly with the stock rockers and pushrods.

BTW, the Chevy rockers won't fit your truck because it uses pedestal mount rockers. I got a set of 1.73 rockers off a 3.8 V6 this week that I'm going to modify to fit my truck. I've been planning this for months, but have put it off becaus I'm a cheap skate and wouldn't buy the parts. I've also almost completed my bowl of spagetti intake manifold that I'm going to try.

 

Silver Streak


Any pix of this experimental (spagetti bowl ) intake?

 

spaghetti bowl? im so confused?

 

good point, didnt take the added lift into account.

IIRC theres a conversion kit out there from crane to convert the rockers over to the right kind.

 

There is a conversion kit to make it stud rockers, but it has its own problems. The bolts are only 5/16 and only live in stock trim because of the way the pedestal base supports them and keeps them purely in tension. When you convert them to studs they are allowed to flex and will probably fail.

 

I've got some pics of the intake, but probably won't post them until I get some dyno numbers.

 

Aw, come on...whats with the suspense? J/K Good luck, hope it works

 

Used that conversion on a 460 with a pretty healthy cam. If it lived with 580 lift 1.7 rockers they would probably work fine in your 300. I used the roller tipped rockers from comp. The cheapies

 

Silver Streak

You won't even give us a hint as to what the term "spagetti" is referring too?

 

It's referring to the maze of tubes circling around.

 

You don't say.


If thats how it has to be...haha...whats a little picture gonna hurt? haha

 

The picture wouldn't hurt anything. The problem is that if you post a pic without results somebody usually tries it themself and then whines that it was a waste of time and ruined a perfectly good part. If I don't post a pic until I have results I can say here's the part and here's what it did. If it works that's great, if it doesn't I warned everyone in advance that it was wasted effort.

 

I understand.

Well then, feel free to e-mail me the picture...haha...seriously I don't mind...I will delete the picture upon my viewing it so it doesn't get out or save it and refuse to duplicate it... . later

 

AHHA nice, please do tell on the results tho, what exactly is the use for this, other than looking really cool if chromed, speaking of which, i wonder how much theyd charge to chrome that intake manifold, bet itd looks pimp...