[242177P]

Originally Posted by TAQuest

Going to need another cam right away.

Short of builders doing R&D, that's gotta be like some sort of new record, right?

[TAQuest]

Originally Posted by 242177P

Short of builders doing R&D, that's gotta be like some sort of new record, right?

Always have been an overachiever.

[TAQuest]

Originally Posted by ta man

It is trickier to tune a 4 speed. You are going to have to work thru the tune from both timing and carb adjustments to find what works. It may be as simple as less vacuum advance, heavier springs to delay mechanical advance,a little more fuel etc. Its trickier with a manual transmission since there is a direct link to the engine.
Like has been suggested a "few" times get a timing light with a tach it will open your eyes to what actually is happening as the engine revs up. Plus when you make adjustments you can document your changes.

Have timing light. Thanks.

[TAQuest]

It's tuned just fine. Runs perfect.

It's just not the cam I need for what I use the car for.

I could spend a lot of time tuning the wrong cam or I can install a different one that's more what I need.

You guys assume a lot. Wrong a lot. Probably just as much as I am, BUT I admit it. lol Thanks for your help.

[pastry_chef]

You will spend time tuning ANY cam that would be suitable for the compression you have. Just reality.

Those E carbs are not correct out of the box for much!

Originally Posted by TAQuest

It's tuned just fine. Runs perfect.

Not if it surges!

Originally Posted by TAQuest

Lots of surging trying to go 30 mph.

[TAQuest]

Originally Posted by pastry_chef

You will spend time tuning ANY cam that would be suitable for the compression you have. Just reality.

Those E carbs are not correct out of the box for much!



Not if it surges!

Easy there dough guy. I have several of these carbs on different vehicles.. I know them very good, thanks. Easy to tune. Never had a problem with them.

[tom s]

E AFB?Tom

[TAQuest]

Originally Posted by tom s

E AFB?Tom

Yes. That's what I'm using. No problems with it. Works great.

[Formulajones]

Pastry Chef is correct, and you won't find much love for those E carbs. They work okay in near stock applications and that's about it. It's basically a copied AFB with parts that don't interchange.

For any kind of performance work you'll need to get into tuning the air bleeds, most likely idle feed restrictors as well as the main circuit, and the transition from idle to main is important from a drivability standpoints with larger camshafts, that's just part of the deal, and those E carbs are a pain in the butt when it comes to that. Much better off with a Q-jet or a Holley if you want to get intimate with the carb.

If I can make a 254 @ .050 cam in a little 302 drive like a dream, and my wife can drive the car daily, then certainly you can make a 227 @ .050 cam work in a much larger 400.

[chiphead]

What RPM range does it surge at? You should be able to tell the difference between an engine that's loping below the cam's powerband and a carb that's causing a lean surge.

[tom s]

E AFBs are no where near as good as factory Crater AFBs!They can be made to work as well but it takes work.This has been beat on for years.They DO race well!Tom

[pastry_chef]

Originally Posted by tom s

it takes work.

TRUTH!

If anyone is curious about Voodoo power band here is a 10:1 CR 400 with a larger hyd roller, same 110 LSA. Strong from 1600 RPM up.
http://forums.maxperformanceinc.com/...d.php?t=795059

[Stan Weiss]

I asked this before and do not believe it was ever answered. What is the cranking compression with the Lunati 703 cam.

While you have owned this car. Has the engine ever run correctly? Looking in at this from the outside I think it time to stop just changing parts and find the problem.

Stan

[Formulajones]

Here ya go. If there was ever an engine that was high strung and lacked a lot of torque, it's this one. With a 780 holley, a 254 @ .050 cam, all in a little 302, it's certainly a little high strung but with the right tuning applied it can be made to be an excellent driver. Knocks down 14 mpg city and 17 mpg highway, and that was before the 5 speed swap. I've spent quite a bit of time tuning it, throttle response is very crisp and quick. 11:1 compression with iron heads and runs on 91 octane.

Been daily driving this thing for almost 3 years now. As you can see, considering it's nature, it has no issue what so ever loafing around town and doesn't complain while doing it.

https://youtu.be/e39e6p7NMY0

[TAQuest]

Originally Posted by tom s

E AFBs are no where near as good as factory Crater AFBs!They can be made to work as well but it takes work.This has been beat on for years.They DO race well!Tom

They work great on a lot of applications. I have one on my daily driver. My plow truck. My race car back in the 80's. They are easy to tune. They usually work great right out of the box. Anyone needs help tuning one I can give some tips, it's easy.
Now on my concourse car I use a Rochester and I had Cliff build that one for me.

[TAQuest]

Originally Posted by chiphead

What RPM range does it surge at? You should be able to tell the difference between an engine that's loping below the cam's powerband and a carb that's causing a lean surge.

EXACTLY! Smart man. I can tell the difference. If I would have said 'lope' instead of surge maybe you guys might have understood better. Sorry about the term thing. Surge came to mind.

[TAQuest]

Originally Posted by Formulajones

Here ya go. If there was ever an engine that was high strung and lacked a lot of torque, it's this one. With a 780 holley, a 254 @ .050 cam, all in a little 302, it's certainly a little high strung but with the right tuning applied it can be made to be an excellent driver. Knocks down 14 mpg city and 17 mpg highway, and that was before the 5 speed swap. I've spent quite a bit of time tuning it, throttle response is very crisp and quick. 11:1 compression with iron heads and runs on 91 octane.

Been daily driving this thing for almost 3 years now. As you can see, considering it's nature, it has no issue what so ever loafing around town and doesn't complain while doing it.

https://youtu.be/e39e6p7NMY0

A 302? Whaaaat? Who cares? Sounds like you have the wrong cam and tried to tune it to that. Cams are cheap and easy. They allow you to choose your power band. I picked the wrong cam so I'm going to use a different one.
Pretty simple thing. And with some lifter noise it's an easy choice for me and my car.

[TAQuest]

Originally Posted by Stan Weiss

I asked this before and do not believe it was ever answered. What is the cranking compression with the Lunati 703 cam.

While you have owned this car. Has the engine ever run correctly? Looking in at this from the outside I think it time to stop just changing parts and find the problem.

Stan

Yes Stan, it runs perfect right now. Plenty of power. I bet I can get some light under the front tires. It's a really fun ride. But I want the power range lower in the RPM's. This might be perfect for a lot of folks but not for us.
I didn't do a compression check. With 93 and no octane boost it's spark knocking quite a bit. Needs some octane boost as it always has. Not going to be a pump gas engine. It is what it is until I decide to take the heads off. I will work with the high compression until I get sick of buying octane booster.

[pastry_chef]

Originally Posted by TAQuest

But I want the power range lower in the RPM's.

Lower than 1600 RPM.. lol
http://forums.maxperformanceinc.com/...d.php?t=795059

If anything your compression is calling for a larger cam still.
You could drop down to a Voodoo 702, still going to have to tune that carb!

[TAQuest]

Originally Posted by pastry_chef

Lower than 1600 RPM.. lol
http://forums.maxperformanceinc.com/...d.php?t=795059

If anything your compression is calling for a larger cam still.
You could drop down to a Voodoo 702, still going to have to tune that carb!

Dough dude, you don't listen. The carb is tuned.

If you can't find something positive to say then you are not much use here.

What's with the exclamation mark? Too much coffee? lol