[Formulajones]

Originally Posted by The Boss

The trick with the cam is duration I believe - the lift is limited but the duration is not.

It has to stay within 1% of advertised so not a lot of wiggle room there.

[SD455DJ]

Originally Posted by The Boss

The trick with the cam is duration I believe - the lift is limited but the duration is not.

Chris, We limit duration to 1% deviation at .050" as well as the lift. You can move the lobes around all you want.

Dennis

[The Boss]

Must be in the FAST class then - from what I understand the lobes look like rectangles.

[Formulajones]

Originally Posted by unruhjonny

any idea how much a TH400 weighs compared to a Muncie four speed?

Mine's got ps & pb, and I have no plans of removing them.
The only type of optional equipment removal I had considered was leaving my car as it was built with a single front speaker... but a dual cone one

that's pretty awesome!

I have both laying here I could weigh.

I run a complete 4 speaker AM/FM stereo in mine, it's a driver first, fun track car second. That's also why I kept compression at 10:1 and didn't take advantage of that rule, and also why I'm still not running any gear to speak of in the car either. So pretty happy with how it's performing.

[SD455DJ]

Dang...Tree'd by FJ!

[Formulajones]

Originally Posted by The Boss

Must be in the FAST class then - from what I understand the lobes look like rectangles.

Yeah the FAST class is pretty much unlimited, solid rollers, you name it. It just has to look stock on the outside, that's pretty much it.
That class gets EXPENSIVE in a hurry. LOL

Kind of why I like the stock class, it keeps costs down, parts breakage is almost nil, and it's still a whole bunch of fun.

[Formulajones]

Originally Posted by SD455DJ

Dang...Tree'd by FJ!

I got some practice on the tree this weekend

[SD455DJ]

Originally Posted by Formulajones

I have both laying here I could weigh.

I run a complete 4 speaker AM/FM stereo in mine, it's a driver first, fun track car second. That's also why I kept compression at 10:1 and didn't take advantage of that rule, and also why I'm still not running any gear to speak of in the car either. So pretty happy with how it's performing.

FJ - Your Formula is running very strong to pull 13.0's at 104 mph at altitude. It would be an easy 12 with good air. That 400 is a torque motor with only 3.31 gears...very impressive!

Dennis

[Formulajones]

Thanks Dennis, I advanced the cam a bunch. Motor seems pretty much done by 5,000 or 5,200 but I did accidently go to 5700 on one upshift when I wasn't paying attention. It didn't speed the car up, it actually slowed down a bit.

But the car does need more gear. 3.73's would be sweet. On the video of the runs you can tell it kind of lugged off the line and the engine was flat for about 30 feet before it really started to move pretty good.

To be fair, I was running drag radials on the car just for giggles. I wanted to see what the car was really capable of without the tire being a variable. The tire was taller than I wanted too (28") I normally run the stock 26" tires on it. So I hurt the gear a bit.

I'd like to go back with the 26" tires and some better air and get that magic 12 sec time slip.

[Formulajones]

And being the type of person I am that likes to tinker and always thinks there is more to be had, I can't help but think the MPH could be better.

It could be the gear holding it back, maybe the taller tire, or maybe the cam position, or a combination of all the above, but I may give the fuel system another good look over too. I'm still running the same 20 year old AC large body pump on it. I almost changed it but it still seems to work good.

Or maybe I'm looking for something that just isn't there, lol.

[Judge273]

Sounds like you'll find out what the max is...