Forums
New posts
Search forums
What's new
New posts
New profile posts
Latest activity
Members
Registered members
Current visitors
New profile posts
Search profile posts
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
RAM TRX - TRX-Forum.com
Bronco Raptor - BroncoRaptorForum.com
Forums
GEN 1 (2010-2014) Ford SVT Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
Underdrive Pulleys - Thoughts????
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="MarkT" data-source="post: 116880" data-attributes="member: 3007"><p>I agree that the "lag" is largely due to the way the computer is tuned.</p><p></p><p></p><p></p><p>I think the gain from using underdrive pulleys would be insignificant on the 5.4 which is probably why nobody makes them. </p><p></p><p>I don't agree that the gains would be lost in the trans and rear end. I can't see how changing the pulleys to reduce the load on the engine slightly would adversely affect the trans and rear end efficiency.</p><p></p><p>Electric water pump? Hmmm... on a drag car where you use a "constant loss" electrical system and charge the battery between runs, yes. But power isn't free so on a vehicle running an alternator the overall power gains would be negligible. Maybe a little quicker revving though (which is what you wanted) and you'd have more water flow at idle. But blow a fuse or fry a relay and you can easily blow a motor before you know the electric pump quit.</p><p></p><p>The BIG drag is the radiator fan which Ford already went to electric on the Raptor.</p><p></p><p>As far as the Rigid lights? They use flea power compared to regular lights so even if you managed to find underdrive pulleys, you'd be fine.</p><p></p><p>I think even if you managed to reduce the "mechanical" drag slowing down engine response, you'd still notice the built-in computer delay more.</p></blockquote><p></p>
[QUOTE="MarkT, post: 116880, member: 3007"] I agree that the "lag" is largely due to the way the computer is tuned. I think the gain from using underdrive pulleys would be insignificant on the 5.4 which is probably why nobody makes them. I don't agree that the gains would be lost in the trans and rear end. I can't see how changing the pulleys to reduce the load on the engine slightly would adversely affect the trans and rear end efficiency. Electric water pump? Hmmm... on a drag car where you use a "constant loss" electrical system and charge the battery between runs, yes. But power isn't free so on a vehicle running an alternator the overall power gains would be negligible. Maybe a little quicker revving though (which is what you wanted) and you'd have more water flow at idle. But blow a fuse or fry a relay and you can easily blow a motor before you know the electric pump quit. The BIG drag is the radiator fan which Ford already went to electric on the Raptor. As far as the Rigid lights? They use flea power compared to regular lights so even if you managed to find underdrive pulleys, you'd be fine. I think even if you managed to reduce the "mechanical" drag slowing down engine response, you'd still notice the built-in computer delay more. [/QUOTE]
Insert quotes…
Verification
Post reply
Members online
never_summer
Reptar854
db11000
SeasickLI
TheButcher
CleverGirl_
WA2012
krmzn
AZ Raptor
FordPerf Addict
RCorsa
Waterfowler41
Dgt1031
Judd McPherson
relak
cdkturbo
Eisner62
Dan H
sh00k
Sharpie69
kylesatx
Pikser
Shane361
1BAD454SSv2
ToadSmasher2K1
loganl86
XSTNKT
MarkOne
east raptor 22
SSWIM
Traderjab1
CoolrainRaptor
sambhutta
RaystownRaptor
IHAVETWO
04Ram2500Hemi
raptrrr
dvm
jekyll537
03Cobraraptor
Forum statistics
Threads
93,203
Posts
1,955,941
Members
56,485
Latest member
bjorn-dpc
Forums
GEN 1 (2010-2014) Ford SVT Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
Underdrive Pulleys - Thoughts????
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Accept
Learn more…
Top