Some add on questions
Thread Starter
Burning Brakes
Joined: Apr 2005
Posts: 1,110
Likes: 0
From: JUPITER FLORIDA
Some add on questions
Right now i have an 86' vette with ram air induction, hi flow runners and intake manifold, and vortec heads. How badly would my stock throttle body be restricting me?
how much power is the stock fuel pump good for? can i get a more solid power gain from a higher flow fuel pump?
how much power can you get outa a pulley kit and a ajustable fuel pressure regulator? How about roller rocker arms? Lots of questions
thank you for any answers!
how much power is the stock fuel pump good for? can i get a more solid power gain from a higher flow fuel pump?
how much power can you get outa a pulley kit and a ajustable fuel pressure regulator? How about roller rocker arms? Lots of questions
thank you for any answers!
Race Director
Joined: Feb 2004
Posts: 12,518
Likes: 19
Originally Posted by cplonner
Right now i have an 86' vette with ram air induction, hi flow runners and intake manifold, and vortec heads. How badly would my stock throttle body be restricting me?
how much power is the stock fuel pump good for? can i get a more solid power gain from a higher flow fuel pump?
how much power can you get outa a pulley kit and a ajustable fuel pressure regulator? How about roller rocker arms? Lots of questions
thank you for any answers!
how much power is the stock fuel pump good for? can i get a more solid power gain from a higher flow fuel pump?
how much power can you get outa a pulley kit and a ajustable fuel pressure regulator? How about roller rocker arms? Lots of questions
thank you for any answers!
Burning Brakes
Joined: Nov 2003
Posts: 914
Likes: 1
From: Redding Ca
I believe the stock throttle body will support over 350hp so it should not be any restriction at this point. The mods you are asking about will produce only negligible increases. There are no easy/cheap mods that produce major increases outside of nitrous. This is because our C4's are already a well engineered and coordinated system. So it takes a bit of planning and $$ to decide where you want to be, hp-wise, and the simplest way to get there.
You might focus on a cam change and headers as a good place to start. And as long as you are into the engine, porting the heads. Gears and converter are also good candidates. Eventually the TPI-style runners will become the choke point when the engine can rev past 5000 and still make power. That is why so many move up to Superram or Miniram. The key is a balanced program.
You might focus on a cam change and headers as a good place to start. And as long as you are into the engine, porting the heads. Gears and converter are also good candidates. Eventually the TPI-style runners will become the choke point when the engine can rev past 5000 and still make power. That is why so many move up to Superram or Miniram. The key is a balanced program.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
You can test your fuel pump. If it holds pressure to and through your red line or shift point, there is nothing to be gained with a different pump.
Ditto the fuel pressure regulator. IF the air fuel ratio is where you want it, all you can do is mess it up by changing the fuel pressure. An adjustable regulator IS good for small adjustments in the A/F ratio IF you have determined that it needs it. Remember that a fuel pressure change is "global", it affects the fuel supply under all conditions. If the A/F ratio needs tweaking at a specific point, you need to burn, or have burned, a chip to address the specific problem. Changing parts just because someone else is using something is NOT the reason to do it.
RACE ON!!!
Ditto the fuel pressure regulator. IF the air fuel ratio is where you want it, all you can do is mess it up by changing the fuel pressure. An adjustable regulator IS good for small adjustments in the A/F ratio IF you have determined that it needs it. Remember that a fuel pressure change is "global", it affects the fuel supply under all conditions. If the A/F ratio needs tweaking at a specific point, you need to burn, or have burned, a chip to address the specific problem. Changing parts just because someone else is using something is NOT the reason to do it.
RACE ON!!!
Thread Starter
Burning Brakes
Joined: Apr 2005
Posts: 1,110
Likes: 0
From: JUPITER FLORIDA
if the throttle body is not a horse power restraint can it add some?
when porting heads are there usually "dramatic" gains in hp?
i have about 350 horses in my car right now, my goal is 400 without nitrous or boost. does any one have any advice on how to get this extra power? i already have a 474. int/exh lift comp cam, high flow runners and intake manifold, vortec heads, hooker headers and a custom prom.
thanks for any advice
when porting heads are there usually "dramatic" gains in hp?
i have about 350 horses in my car right now, my goal is 400 without nitrous or boost. does any one have any advice on how to get this extra power? i already have a 474. int/exh lift comp cam, high flow runners and intake manifold, vortec heads, hooker headers and a custom prom.
thanks for any advice
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by cplonner
if the throttle body is not a horse power restraint can it add some?
when porting heads are there usually "dramatic" gains in hp?
when porting heads are there usually "dramatic" gains in hp?
RACE ON!!!
Melting Slicks
Joined: May 2004
Posts: 2,286
Likes: 2
From: Stamping Ground KY
if that's the case you may be able to get your times without more horsepower, you may want to look into a new rear gear, if you have an auto a new stall would benifit too!
A dyno tune, if you haven't already had one done, should also help.
A dyno tune, if you haven't already had one done, should also help.
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