thats a very good question! that might come down to the best tuner at the track....the dyno can only take you so far.....no?

Re: carb info
 

my experience, over 3000#, no glide....

glide
 

I have heard similar opinions, I need to pull the trans and convertor to see any problems and then figure out the next step.
Thanks for your feedback
anyone else ???

Carburetors,3200 lb.412 sbc.2010 350 trans foot brake,Profrom modifed 750 9.67 140.14 best.Pro systems 1000 Holley hp 9.70 140.63 best.2011 same motor glide trans brake,same day test,Proform 750 9.62 140.80,Pro slstems 950 holley hp 9.70 140.71.Same track good air Proform 750 9.55 142.14. 2 weeks later good air Holley Ultra aluminum 850 9.38 144.93.The new aluminum holley did the best for me.Bill.

Man thanks for the info......I noticed nobody said anything about the Predator Carbs I know they are old but are they pretty much out dated nowa days? I'm only spinning my 463 to 6200 rpms, just a little info for y'all, but all the lower end is forged (H-beam rods, Icon flattops, Lunati Sledge hammer crank) the heads are Edelbrock Alum Performers with Comp gold roller rockers and a Lunati barebones cam prt#60202 at summit, ignition is a MSD 6AL2...so after all that am I making the right decision on the 6200 rpm rev limit and is the 850 gonna be suffient for max HP and torque? Budgetwise my finacial advisor (my Wife) is suggesting around $700. I can get the Predator for $375 and the Quick fuel I was looking at was $530

carbs
 

I have never used a predator, but I was at a dyno shop , a motor they were testing had a predator carb on it, they had hard time getting a stumble out of it at the crack of the throttle. They got it better, but they did put a "proven" ( carb from another motor that made good power) and it took care of the stumble, they ended up putting a 950 4150 base holley on it and it ran fine and made 39 more peak HP from the predator and 26 more than the "proven" holley. The motor was a street motor 468 in BBC full hydralic roller decent alum heads That all they wanted me to know ?
Not sure that helps, but Its what I saw.
I will say that dyno are very helpful, I have seen motor dynoes and chassis dynoes.

The best carb will always be the one you tune to work with your combo. Take the time to do that and the only thing you have to figure out is how big your combo needs. Buy a quality carb that has all the metering adjustable. Holley's new Ultra carbs have all the right parts, Quick Fuel as well. Pick one and tune it..

And if you can't find one big enough I might be able to help... :wink:

http://i287.photobucket.com/albums/l...io/BigCarb.jpg

carb size
 

Hello Mark
540 In 810 Hp 3660 street driven chevelle not sure if I will stay with t400 or go to a glide
1050 or 1150 in your opinion
also do you do carbs, just got a brand new (non ulta 1050 holley)
jeff

Jeff a 1050 is a good option for your engine, there is some power gains in moving from the stock holley stuff. Nyes surely doesnt run Holley on their own stuff I promise you this ;)


Mark, I didnt want to start a pissing match on drr asking this question so I will ask on here its a bit more civil :) I wonder if you have ran the bigger cfm billet main bodies say like 1600cfm vs a holley 1250 main body. Reason I ask, what I see is a lot of power on the dyno and can never get them to be as fast on the track under accelration. Same goes for my injection (2100cfm terminator) we've been able to make awesome power on the dyno with my combo (25hp avg and 30trq avg better) but yet it does not run faster on the track.