 dohc. ONE pully |
 Aug 15, 2006 - 1:26 PM
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 Enthusiast  Joined Jan 29, '06 Currently Offline Reputation: 0 (0%)  |
the 5sfe have dohc but one cam is driven by the belt, and that cam drives the other cam, why is it set up like this , why not just two pullys ? what are advantages and disadvantages?
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Aug 19, 2006 - 4:29 PM
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 Enthusiast Joined Aug 9, '06 From Ma Currently Offline Reputation: 1 (100%) |
It depends what you are trying to do......................................................
The 5SFE wasn't designed for high rpms. It was designed for low rpm power. In which that particular setup works quite well.................. The narrow design hurts high rpm performance, weather it's NA or FI. Look at Mannys 5SFTE. Wonder why he's making more torque? At lower rpms?. --------------------  |
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Aug 19, 2006 - 5:52 PM
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 Enthusiast Joined Dec 27, '03 From Nor Cal Currently Offline Reputation: 0 (0%) |
QUOTE(alltracman78 @ Aug 19, 2006 - 9:29 PM) [snapback]470649[/snapback] It depends what you are trying to do...................................................... The 5SFE wasn't designed for high rpms. It was designed for low rpm power. In which that particular setup works quite well.................. The narrow design hurts high rpm performance, weather it's NA or FI. Look at Mannys 5SFTE. Wonder why he's making more torque? At lower rpms?. I don't think you understand what I'm saying. There's no way to make additional n/a power (not talking about making stockish power here) in a 4 cylinder without revving the engine... PERIOD... regardless of the head. Case in point... how many 1.6 to 2.0 liter 4 bangers do you see making 200hp n/a with a 6200 rpm redline? None. In the case of the 5SFE... it can't rev because the head doesn't breathe well at higher rpms (makes it redundant to rev) nor does the stroke ratio like being revved (stress peaks = torque loss)... true enough... but forced induction changes the game. The power potential isn't so much limited by the head with forced induction, as it is limited by how much you boost (the set-up). The only thing the FE head affects strongly, is where that power is located... but the more torque you have, the less you have to worry about "where" power comes it the strongest. To further elaborate this point... think gearing. FE head = bad n/a platform... great F/I Platform... excellent daily driver GE head = great n/a platform... great F/I platform... ehh daily driver (TVIS/ACIS for the daily driver) -------------------- "It's ok to be naked girl... I'm an artist!"
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Posts in this topic
freakyre33c dohc. ONE pully Aug 15, 2006 - 1:26 PM
pure_dx toyota's fe heads, notice on the ge heads, its... Aug 15, 2006 - 1:38 PM x_itchy_b_x its called a slave cam. you can adjust them togeth... Aug 15, 2006 - 1:42 PM alltracman78 It is because of the valve angles.
The FE and GE v... Aug 17, 2006 - 8:27 PM Kwanza26 advantage = 16V performance without rocker assembl... Aug 18, 2006 - 1:30 AM
alltracman78 QUOTE(Kwanza26 @ Aug 18, 2006 - 1:30... Aug 18, 2006 - 9:45 PM Kwanza26 QUOTE(alltracman78 @ Aug 19, 2006 - 2... Aug 18, 2006 - 10:26 PM alltracman78 QUOTE(Kwanza26 @ Aug 19, 2006 - 5:52... Aug 19, 2006 - 10:54 PM Kwanza26 QUOTE(alltracman78 @ Aug 20, 2006 - 3... Aug 20, 2006 - 12:00 AM alltracman78 QUOTE(Kwanza26 @ Aug 20, 2006 - 12:0... Aug 24, 2006 - 9:41 PM Kwanza26 QUOTE(alltracman78 @ Aug 25, 2006 - 2... Aug 24, 2006 - 11:03 PM alltracman78 QUOTE(Kwanza26 @ Aug 24, 2006 - 11:0... Sep 3, 2006 - 12:47 PM Bigmeanbulldog55 I know it's been argued, but I need to just pu... Aug 19, 2006 - 7:00 PM |
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