SalikDDD

thinking of switching to the xcelerator when getting my new carb due to it being matched with my cam - but i'm wondering is anyone else running it or anyone know how well it is?

kalli

xcelerator? never heard of it

SalikDDD

weiand xcelerator intake manifold....

67mustang302

What's your setup? Single plane intakes are pretty big, and most street engines will make less power with them, unless it's a rather potent stroker.

SalikDDD

considering the xcelerator fits in with the powerband of my cam i don't think it's "too big" - and if i just stick a stealth on it, then that's no fun since i'm not getting anything from idle til 1500 which is where the xcelerator takes over, from 1500+

67mustang302

First of all there's a lot more to it than just rpm. And secondly, the rpm ranges they list are where the intake works best, that doesn't mean it won't work outside that rpm ange. Third, dual planes prevent the charge robbing problems associated with single planes, so I can garuntee you that the Stealth for instance will make more power from idle-4,000rpm than the Xcelerator will(unless it's on a stroker), and that's where you're going to spend about 90-95% of the time in a street car. There's really a LOT more to it that "what's the rpm range" when it comes to intakes and carburetors.

What all is your setup?

SalikDDD

technically the car is not a "street car" it's going to be tracked most of it's life which is why i'm considering it. my launches will be at over 2400 rpm and such.

my setup is just a bored 289 - gt40p's xe268h, 600 cfm, 25-2800 stall, 3.73's etc

67mustang302

It'll get down the track faster with something like an RPM Air Gap or Weiand 8124, or maybe even a regular Performer. It has small heads, a small cam and small displacement. Intakes aren't just about being able to move the most amount of air and therefore making power, they need to move ENOUGH air for your engine without being a restriction, while keeping induction velocity up, preventing charge robbing and communicating vaccuum signal from the cylinder to the carburetor. And the intake also needs to maintain a strong enough induction velocity to get the carburetor to meter effecticely. Ultimately power is made in the chamber by burning fuel, it's not made by simply having an intake, or any other part for that matter, that CAN flow a whole bunch. If you weaken the induction system, you weaken atomization and fuel distribution, which results in less effective combustion and less power. Daul plane intakes like the Weiand Stealth and RPM Air Gap will make more power than a single plane up to around 6,000rpm, after that is where single planes start to make more power(generally speaking). And even then, the good daul plane intakes will make better average power than the single planes until around 6,500-7,000rpm. The exception are heavy breathing strokers, where you're putting an intake designed for a smaller engine, onto one that's pulling a lot more air, so the single plane benefits because a daul plane MAY be a restriction at mid-high rpm ranges. Intakes like the Weiand 8124 or the RPM Air Gap were developed based on current available engine technology, and have taken into account the common use of strokers, so even those daul plane intakes can breathe very effectively on strokers, since that was taken into consideration during development. Too big of an intake or too big of a carb are some of the most common mistakes people make that costs them power, and it usually costs power everywhere.