Registered: May 2001
Location: Hattiesburg, MS
Posts: 24

LS/VTEC

Couple questions to get this started:

Does a 95 LS have a place for knock sensors (I was told no)

If planning to go all out: head work, CTR pistons, Rods, Lightened valves and retainers- reving up to 9000 which valve springs should I use. Everyone says Type R, but will they hold up in the elements of 9000.

When boring out a throtle body, whats the wrong way and whats the right....

I've heard that mating the T fitting to the block can cause problems under harsh driving conditions(leakage). Should I run SS line off the block for a short distance before the T.

Don't waste time talking S#!? about the LS/VTEC, its already been said, and daily those people eat their words......

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Registered: Apr 2001
Location: Toronto Ontario CANADA
Posts: 4249

when people run the J&S Safeguard you can use the valve cover auxillary port or drill on on the valvve cover to place a knock sensor. GVtec has firsthand experience with using an additional knock sensor in the J&S and can advise better than I if you need an alternate location port.

The valvesprings you get is dictated by the cams you get. The installed spring height must follow the cam makers guidelines. Put in the wrong installed height and you run into clearance problems especially with the CTR domed pistons.
Some people have used ITR outer valvesprings and Portflow inner valvesprings and these work well with many cams up to 9000 rpm. But if you gte Jun cams I suggest Jun valvesprings and Toda valvesprings for Toda cams, etc.

Honda TB can only be overbored 4mm more than the stock diameter dur to the backscrew plate location and thickness of the walls. So an LS TB can be overbored to a max of 62mm, GSR TB a max of 64mm, and an ITR TB 66mm. The machining quality around the plate and the plate diameter is critical as this determines if the plate sticks open...go to a shop that has done a ton of these with a good rep for non sticking plates...the shitty machine job shops will tell you to loosen the plate screw to get the plate to move back to a bigger diameter section to allow it to move...not a good fix IMHO.
Spoon and Erick Aguielar make tapered TB where the intake side of the TB is 70mm and the manifold side is 64-68mm. You can make your own by having the machine shop use an ITR TB and taper it. Remember to keep all the sensors if you are doing a core exchange and always have the intake manifold port slightly bigger (say 20 thousandths) than the TB diameter to get an antireversion effect. You do not want to go from a big TB diameter to a smaller manifold port...which would kill your flow velocity into the manifold plenum.

There are various ways of tapping the oil line from the head to the block for the VTEC solenoid. The shorter the distance the better.

cheers

__________________
This isn't a thousand to one shot. This is a professional blood sport...To men who drive cars fast well, racing is life...everything else is just waiting.

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Registered: May 2001
Location: Hattiesburg, MS
Posts: 24

quote:

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Originally posted by Tuan
when people run the J&S Safeguard you can use the valve cover auxillary port or drill on on the valvve cover to place a knock sensor. GVtec has firsthand experience with using an additional knock sensor in the J&S and can advise better than I if you need an alternate location port.

The valvesprings you get is dictated by the cams you get. The installed spring height must follow the cam makers guidelines. Put in the wrong installed height and you run into clearance problems especially with the CTR domed pistons.
Some people have used ITR outer valvesprings and Portflow inner valvesprings and these work well with many cams up to 9000 rpm. But if you gte Jun cams I suggest Jun valvesprings and Toda valvesprings for Toda cams, etc.

Honda TB can only be overbored 4mm more than the stock diameter dur to the backscrew plate location and thickness of the walls. So an LS TB can be overbored to a max of 62mm, GSR TB a max of 64mm, and an ITR TB 66mm. The machining quality around the plate and the plate diameter is critical as this determines if the plate sticks open...go to a shop that has done a ton of these with a good rep for non sticking plates...the shitty machine job shops will tell you to loosen the plate screw to get the plate to move back to a bigger diameter section to allow it to move...not a good fix IMHO.
Spoon and Erick Aguielar make tapered TB where the intake side of the TB is 70mm and the manifold side is 64-68mm. You can make your own by having the machine shop use an ITR TB and taper it. Remember to keep all the sensors if you are doing a core exchange and always have the intake manifold port slightly bigger (say 20 thousandths) than the TB diameter to get an antireversion effect. You do not want to go from a big TB diameter to a smaller manifold port...which would kill your flow velocity into the manifold plenum.

There are various ways of tapping the oil line from the head to the block for the VTEC solenoid. The shorter the distance the better.

cheers

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