mustangmuncher

My friend was looking into LT4 heads, intake, and lt4 hotcam. I was looking at prices for these items, and heads with everything minus roller rockers and pushrods were about 1,500 dollars. The intake manifold is about 220 dollars. The hotcam with roller rockers either 1.5 or 1.6 is about 220 dollars as well. The timing chain and cover is about 350 dollars. I am not sure if these prices are about right, but they are the prices on tbyrne.com. I was wondering if the gains were worth it, especially if you were to get the heads ported and the intake ported. Is the lt4 hotcam a good choice going this way, or go more aggresive if porting is in order. Any other opinions on what my friend could do with the valvetrain. Its a 95 Z28, six-speed. It has a loudmouth and headers, CAI, cut-out, high-flow cat. All else is stock. Thanks for any help you can offer.

Camaro94Lover

You could try gmpartsdirect.com for a comparison pricing. I usually buy my replacement GM parts from them for a heck of lot less than what a dealership sells them for.

GM Parts Direct

Camaro94Lover

Oh here is some information from TPIS regarding the GM Hot Cam.

Q: I have a 95 LT1, it has LT4 heads and intake, LT4 fuel injectors, 1.6 roller rockers, 52mm throttle body, 1 3/4'' SLP headers, GM Performance Parts Hot Cam, ACCEL 300+ Ignition and K&N fuel injection performance kit. Idles good, but when I hit the throttle it is slow to respond, and when it does, it isn't very impressive. Do I need a re-programmed computer? A larger fuel pump or an adjustable fuel pressure regulator? Any help you can give me would be greatly appreciated.

A: The Cam is too big for a 350 motor. I get this question all the time with the LT4 Hot Cam. If you look at the duration @ .050 it doesn't look bad , but it must be huge everywhere else in it's lift range. It would be fine in a 383 or bigger motor with a lot of compression, and a deep gear. Also the intake port volume of the heads are big for a 350 street motor. In order to use these pieces you would want to stroke the motor and or raise the c/r, or add a supercharger. When you go with big cams and 1.6 rocker ratio, and add big heads you will lose a lot of your bottom end power and most of your mid-range power. What happens is the velocity of the air slows down that's why you go slower. The whole set up is still on the big side for a 383 ci motor. You will make more power but it will be all up top.
TPiS

Izod

theres half a million board memebers who run the LT4 HC with no problems and love it. while there may be better cams out there, the price for the entire set up of springs and RRs is a pretty sweet deal. i would get some better springs though.