Toda vtec killers

**joe.teg** · 27-04-2009 11:15 AM

hey guys

with the toda vtec killer cams obviously you ablish vtec but why, what is the advantage. Its that these cams are viscious and lumpy as and for drag use, but why abolish vtec?

**burak213** · 27-04-2009 11:30 AM

so power is constant thru the power band, constant trq curve, and they make power after 5000rpm to like 12k in some cases

**Lowa** · 27-04-2009 11:40 AM

Its not so much that Vtec has been abolished, more so that the low cam profile has been removed, i.e your in vtec all the time.

If you want to learn a bit more about them theres a good thread on HT
http://www.honda-tech.com/showthread.php?t=2141440

**joe.teg** · 27-04-2009 11:47 AM

yeah
i was aware that they only run one profile and they have slolid liifters etc.
thanks for the help guys

**rmalov** · 27-04-2009 09:28 PM

ur vtec lobe is pritty much the only lobe working, constant vtec..

**VTECMACHINE** · 28-04-2009 12:05 AM

They are especially designed for a certain class of Racing in Japan, where you are not allowed VTEC. Forgot the class of racing.

**string** · 28-04-2009 12:09 AM

All B heads are solid "lifters" VTEC or not.

**eeKayFouR** · 28-04-2009 12:19 AM

24/7 VTEC ftw!

**jetdc2R** · 28-04-2009 09:34 PM

24/7 vtec ftw

**delsol9000rpms** · 28-04-2009 10:50 PM

They remove the high profile cam completely off the camshaft, and make the primary lobe larger... Refer to this post

Originally Posted by TODA AU

Regarding Vtec killer camshafts:
Design
The overall design and construction of the camshaft has been very heavily revised from the standard configuration. Areas of stress, rigidity and weight all gaining significant benefit. Generally camshafts are manufactured from solid blanks. TODA Racing VTEC KILLER Camshafts are produced from hollow blanks. Being hollow not only reduces weight but also improves valve timing accuracy through a reduction in flexing as the overall rigidity of the camshaft is increased.
Unlike a Vtec camshaft, the Toda Racing Vtec killer camshafts have two cam lobes, which are of the same size. The Toda Racing Vtec killer camshaft is designed to bed in quickly and have a low wear rate.
Characteristics
There is no longer a secondary (Vtec) lobe on the camshaft, the mid rocker arm is therefore redundant. It is removed and replaced with a rocker arm spacer. (PN. 14632-B16-000) The two pins in the remaining rocker arms are also removed. The oil feed rocker arm is fitted with a rocker arm plug to prevent any loss of oil. (PN 14651-B16-000) The benefits in a racing application for omitting the Vtec is the reduction of the valve train (reciprocating) mass and friction. The reduction in reciprocating mass and friction results in better engine response and increased valve train reliability. Furthermore, another benefit of disabling the VTEC system is the removal of fluctuations in the oil pressure system, securing reliable oil feed to all the main moving components. The factory “Lost motion devices” should be removed.

Cheers

Adrian