427 SBF

In his case it's a wide bore (4.25 dia) 445 ci SB2 in a late model. Flat wide open no brakes no lifting. The white car.
www.facebook.com

1.2K views · 19 reactions | WFO, zero brakes Thanks to Brian Bubba Maneval and Todd Brennan for the countless hours on the phone and helping me get this turd rolling. Thanks Barry Lenhart for the video and Jordan Specht and Shaun Lawton for the h

WFO, zero brakes Thanks to Brian Bubba Maneval and Todd Brennan for the countless hours on the phone and helping me get this turd rolling. Thanks Barry Lenhart for the video and Jordan Specht and...
www.facebook.com www.facebook.com
Disclaimer: I know nothing about circle track, only what I'm told.
 
Last edited:
Wowee!
Yep, if the ideas hold true long rods would do the trick there.
 
More lsa stuff from engine masters. They even say, the engine in this test is a weird one because of the parts choice. But seems to follow the trend.

Also the part where they say tight lsa with a manual trans and they buck down low and miserable to drive

 
Last edited:
89 Fox 427 said:
More lsa stuff from engine masters. They even say, the engine in this test is a weird one because of the parts choice. But seems to follow the trend.

Also the part where they say tight lsa with a manual trans and they buck down low and miserable to drive
Click to expand...

The best rule might be - if you only run on the street go one step less on everything that shows the best numbers on the dyno.
Race cars don't have to worry much about part throttle...
 
Steve439 said:
The best rule might be - if you only run on the street go one step less on everything that shows the best numbers on the dyno.
Race cars don't have to worry much about part throttle...
Click to expand...

That cam I had in there for a whole 10 miles sounded great and everything was really snappy. Wish I could have kept that thing together. Bangr was impressed with it. Or lying, not sure 🤷‍♂️
 
89 Fox 427 said:
That cam I had in there for a whole 10 miles sounded great and everything was really snappy. Wish I could have kept that thing together. Bangr was impressed with it. Or lying, not sure 🤷‍♂️
Click to expand...
Is that cam still useable? Stick it in!
 
89 Fox 427 said:
@Patriot Racer well you better go adjust your lash for more horsepower!

Click to expand...
I did this a few years ago. I found my engine liked BOTH tighter, but my engine builder said don't leave it like that, one over-rev and I could have a HUGE issue! I picked-up over .1 and almost 2 mph with them tighter. He told me next time I freshen the engine let's change the cam. I said NOPE! I am already slowing it down for 10.00 Index Racing, what's the point of making more power. Maybe later..........
 
Can I reuse arp head bolts? This would be the 3rd time they'd be torqued
 
89 Fox 427 said:
Can I reuse arp head bolts? This would be the 3rd time they'd be torqued
Click to expand...
When a bolt is torqued properly it stretches. As long as it returns to its original length when loosened it can be reused.
So technically you would need to know the original length and have an accurate way of measuring the bolt.
That being said I'm sure you'll be ok
 
 
What kind of air cleaner do you have?

The Chevy "L88" has the lowest drop I know of.
I have a somewhat flattened top on my setup too.
You'll notice the L88 version doesn't have the breather tube, which interferes the secondary accelerator pump apparatus.

www.volvette.com

67 AIR CLEANER BASE (L88)

Check out the deal on 67 AIR CLEANER BASE (L88) at Volunteer Vette Corvette Parts
www.volvette.com

AC37E_580x580.jpg
 
Steve439 said:
What kind of air cleaner do you have?

The Chevy "L88" has the lowest drop I know of.
I have a somewhat flattened top on my setup too.
You'll notice the L88 version doesn't have the breather tube, which interferes the secondary accelerator pump apparatus.

www.volvette.com

67 AIR CLEANER BASE (L88)

Check out the deal on 67 AIR CLEANER BASE (L88) at Volunteer Vette Corvette Parts
www.volvette.com

AC37E_580x580.jpg
Click to expand...

I have a drop base with a summit (k&n knock off) air cleaner with filter top. I'll refer to engine masters again 🤣🤣 they tested air cleaners and they make the most hp when the air had a straight path down to the carburetor. Drop bases performed worse than flat base.

Salad bowl was top 3 for hp.

Hell, even a filter lid with the sides taped up did better than with it not taped.

Don't be surprised if I tape up my air cleaner on the dyno
 
Also, I have already had to cut my carb vent tubes because the drop base caused the top of the air cleaner to hit them
 
Yeah, I'd like to run something better but I have no room.
I had cut my vent tubes too.
Straight across with a pipe cutter... :banana:

Some of this stuff doesn't agree with what is intuitive.
The air cleaner on tri-power Corvettes has about half the filtering area of the normal 14x3.
I wondered for years if that's what caused the 15 HP drop when they put tri-power on the '67 vs '66.

Nope, a guy I trust on the Chevelle forum dynoed a tri-power motor with and without the air cleaner.
The HP loss wasn't worth worrying about.

It would be really interesting to see if using a single plane and reducing the height of the element to fit gains HP.

That combo Brian posted a bit above looks to be .7 higher than a Performer RPM.
 
You must log in or register to reply here.
Back
Top