Throttle Bodies Injection - Honda RC51 Forum : RC51 Motorcycle Forums
 
LinkBack Thread Tools Display Modes
post #1 of 8 (permalink) Old 06-11-2010, 11:37 AM Thread Starter
Junior Member
 
anatolpiupiu's Avatar
 
Join Date: May 2010
Location: Portugal
Posts: 16
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Throttle Bodies Injection

Anybody know if the throttle body of sp2, fits in sp1 ?
its plug & play ?

many thanks
anatolpiupiu is offline  
Sponsored Links
Advertisement
 
post #2 of 8 (permalink) Old 06-18-2010, 12:40 PM Thread Starter
Junior Member
 
anatolpiupiu's Avatar
 
Join Date: May 2010
Location: Portugal
Posts: 16
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Who can help me ?
anatolpiupiu is offline  
post #3 of 8 (permalink) Old 06-18-2010, 02:21 PM
Senior Member
 
Join Date: Jun 2009
Posts: 170
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
No, I think if you want to use the SP2 throttle bodies you will need at the SP2 ECU, maybe more. From what I've heard it's more trouble than it's worth.
watskooo is offline  
 
post #4 of 8 (permalink) Old 06-26-2010, 10:57 PM
Junior Member
 
stu494's Avatar
 
Join Date: Jul 2009
Location: Brisvegas Australia
Posts: 23
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
It will work

I am running SP2 TB with a SP1 ECU. You will need a power commander for this to work.
There are mixed feelings about doing this, some say it is not worth it, and you get more mid HP with the SP1 TB. I think if this was the case, there would be a demand for them.
I like my SP1 with the SP2 TB, I think it is smoother, and it fuels better, but I do have a custom map. There is no troubles in setting it up, just get the SP2 boots as well, as they are a different size. The rest is just plug and play
stu494 is offline  
post #5 of 8 (permalink) Old 06-27-2010, 01:49 PM
Banned
 
Join Date: Jan 2009
Location: Live Free or DIE
Posts: 427
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
the SP1 makes better HP and torque low to mid then the SP2 only being bested by like 2hp at near max revs
Mrgrn is offline  
post #6 of 8 (permalink) Old 06-28-2010, 12:04 PM Thread Starter
Junior Member
 
anatolpiupiu's Avatar
 
Join Date: May 2010
Location: Portugal
Posts: 16
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
many thx ppl for your answers
anatolpiupiu is offline  
post #7 of 8 (permalink) Old 09-30-2010, 11:47 PM
Junior Member
 
Join Date: Sep 2010
Posts: 2
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
This is great! i needed this info right now as well! i have code 8 "tps" and checked with multimeter and it's not a wire problem: just couldnt do very last check with test harness cuz i dont have one but i think i need to replace whole throttle body assembly on my 2001 so i figured if i have to buy it anyway maybe i should buy SP2 TB since i hear injectors are better so better throttle response and can anyone tell me if the TB size is larger (i think so).

stu494: can you confirm exactly what i would need? just TB and boots and power commander? do i need the TB wire harness from SP2? does SP1 airbox and velocity stacks fit on SP2 TB? and which pcIII would i buy SP1 or SP2 and what MAP?

THANKS for your help!

Last edited by csteingraber; 09-30-2010 at 11:58 PM.
csteingraber is offline  
post #8 of 8 (permalink) Old 10-03-2010, 06:54 AM
Junior Member
 
stu494's Avatar
 
Join Date: Jul 2009
Location: Brisvegas Australia
Posts: 23
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Csteingraber, if you want to change over to the SP2 throttle bodies, you will need the Throttle bodies themselves, the rubber boots that go between the throttle bodies and the motor, the clamps for the boots, and the velocity stacks.
All cables are interchangeable, and the unit will just plug into your existing wiring harness, providing that what you pick up is complete. I dont know about the airbox though, as I installed one of Turn Ones at the time. Thinking back, the bottom of the airbox box sat on top of the throttle bodies, so there will more than likely be a difference; SP1 TBs are 54mm and the SP2 TBs are 62mm. there are differences with the injectors as well SP1s had 4 holes per injector, and the SP2s had 12; I dont think you can change them around without too much mucking around.
Once installed, you will need to run a power commander, and have the bike mapped. Thats all there is to do.
Now for the good bits; if you are going to do this, consider running a bigger airbox, and possibly a snorkel. I ended up doing the whole lot in one hit SP2 TBs, Turn One CF airbox and snorkel. When I had mine Mapped, I was pushing 133 RWHP, but I know that is dependent on the dyno. The seat Dyno liked what happened; the bike was a lot smoother, fuel use was around the same, but the bike sounded like it was breathing better, and wanted to go harder.
As Mark says, there is proof that the SP1 TBs will make more mid-range horsepower than the SP2s, but the trade-off is that it will take away a lot of the jerkiness associated with the SP1. The call is yours; I am sure you could pick up both types of throttle bodies if you look hard enough and didnt want to go through setting up the SP2 TBs
stu494 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Honda RC51 Forum : RC51 Motorcycle Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome