1300CFM is enough for the badest 406 on the planet.

 

Agreed.

I'd like to try out the badest 406 on the planet someday

Steve

 

Looks good!

 

Obviously I'm a bit biased, but I’m happy with how it came out. As with anything you need to do some tweaking to make it work, but wasn’t as much as I had originally expected. Now the trick is to turn all those low end gains into overall and higher rpm gains.

 

I have a 58mm TB sitting in my garage that was replaced by the monoblade. We were hitting the wall making over 465 rwhp and replaced the 58 with the monoblade to see if it was the issue. it wasn't and the air flow math said it wouldn't be but we too a chance just to see.

In the fall when the weather is better just for poops n grins we're going to put the 58 mmTB back on an dyno the sucker to see if there is any difference at all. My partners thinking is there may be a remote chance of even picking up a tiny bit over the monoblade. Dunno....we'll see but the 58 mmmTB is good for a lot more power than most are making here.

 

Good to see you back, Denny. Nice job!

 

Thanks! Staying away on purpose. Just post on things I have done and have measured myself and pretty much leave it at that. Way too much smack talk and disrespect for me on these lists. That I can do w/o but felt I had some worthwhile info to share.

 

You did. Thanks!

It does take a thick skin sometimes on these forums. I've developed that (and some age spots) with advancing years. If smack talk is directed my way I always consider the source. There are some folks who's opinion of what I post makes a difference to me, but not too many of them talk smack. As for the others, they have me confused with someone who gives a fat rat's butt what they think of me.

I'm just here for the beer!

 

I kind believe the 58MM TB is plenty for a 355 also, but hey crazier things have happend. Thanks for the pics Denny, looks way cool but a shade too tall for an F-Body cowl. That Tq and RPM range change is astounding. I never knew the runner length could have that much effect. I'm anxious to see if you can bring it back up with a cam change.

Steve

 

I never knew the runner length could have that much effect. I'm anxious to see if you can bring it back up with a cam change.

Steve[/QUOTE]

The runner length effect fooled us also. Just wasn't expecting a 50lb increase in torque, thought it would be all on top. Live n learn for sure. (Got a good one on expensive stepped headers n merge collectors also)

Got two cams picked out and if the first doesn't work, well then there is another one we'll try then. And if that doesn't work......don't know what in the hell to do.

 

Care to share what you learned with the headers?



David

 

Thanks for all the interesting replies. The two custom intakes that had photos posted are pretty cool. I was doing some research on variable volume/length intake manifolds a couple days ago and ran up on some interesting designs. I think it was Audi that makes one that has long runners with a short runner Y-ed in just upstream of the injector. A butterfly valve opens where the long and short runner connect as RPM's come up to change the intake tuning. Don't know if there's enough room to make this practical on an LT1 F-body but seems like a pretty good design. Long torque enhancing runners that open up into top end short runners. I'm going to think on it some more and might wind up and build something stupid
Regards, Michael

 

Let's say it was a $2,000.00 lesson on diving into the pool w/o checking how deep the water is taking someone's word on it. We picked up nothing. Yep, CNC ports, 1 3/4th to 1 7/8th to a 3" Burns style merge collector with 2 1/2 reducer. And the dyno said zippo!

Haven't given up completely on the headers as couple hardcore racers I know say they are the real deal but the cam needs to be changed to get the most out of the headers.

Already got a couple of cams that we'll try and still doing some research but everything is on hold till the weather gets better. It was 107 here in Dallas with everyday over 100 degrees and orange polution alerts. Not exactly home run tuning weather.

Now you should hear the story about the exhaust vacuum bungs and hooking them up to the valve covers.

 

Thats old school stuff, mid 90's Ford Probe v6 cars had that and 96 4 cam Cobras also had it...nothing new.


Why would you explore that when there are many proven power makers aout there?


David

 

David, are you saying because it's been done before or it's "old school" that it's not worth doing? The F1 race cars and one of the new Ferrari's use a variable length ( and I think variable cross section on the F1 stuff) intake setup to boost low end with out compromising top end. So what if a Ford Probe or Cobra used something similar 15 yrs. ago. Are you saying Ford spent the money to put this stuff on millions of engines and it didn't have any effect?
I'm interested in kicking out as much midrange torque and throttle response as possible with still decent top end pull ( 5500 to 6K without falling flat). The Accell Super Ram intake would probably work pretty well for this but I can't think of anything else off the shelf that would be suited here. Maybe you can suggest some other proven power makers for a NA small cammed ( 220ish on duration) 383 that would boost midrange with still decent top end?