I have a 2002 T/A WS6 with 18K miles on it. It is my gararge princess and keeps my "78" goldwing company. I got lost in the "O" zone and came up with this though and looking for comments. This car is stock except for the SFC's and a flow master exhaust. I have no ambition to do any thing to the engine but let it breath by adding long tube headers,lid and the free mods. I was thinking about changing the pusrods to the chrome moly ones, leave them stock length and changing the rocker arms, due to the occasional missed shift, but replacing them to the 1.8 ratio just to punch those valves open a touch more. If iI am correct I can push those valve to approx .6 Any comments on this. THANKS

 

well if you put in hardened push rods and oyu miss a shift you are just gonna break something else most likely. Someone correct me if im wrong, im no expert.
You could also pull the heads and put on a thinner head gasket to up the cmpression ratio if you dont wanna do anything real serious...

just a thought.

 

I am trying to keep the engine sort of stock (pretty vague) I am looking for just allittle more push. I live in the Gestapo state of Mess. and there aren't alot of non track spots to really run. It just for my enjoyment of driving the car. I gave up my "68" GTO for this.

 

1.8's are kinda a waste they really wont do anything. Dont use hardened pushrods on a stock valvetrain, if you miss a shift instead of bending the pushrods which are eaqsy to replace you will break valvesprings and bend valves which are way more work and cost way more $$ to fix.

 

depends on which rockers you get. i put the vinci/crane 1.8 accelerated lift rockers kit on the wife's car with stock cam and stock tune. here's the graph. without getting into the whole cost vs power debate, for someone wanting more without getting too deep into the motor, this is a good choice to make.

 

Please excuse the newbie in me but that is what I am looking for. I don't want to get deep in the motor but want to correct some of the upper end flaws. My son Tilly bent his pushrods in his 1999 LS1 camaro (missed a shift or 3) and is recomending harden pushrods. I want to avoid the lifter issue with the needle bearings moving out. So I figure just push the valves open more for better flow. I am a granny shifter type. Costs who cares it is a hobbie.

 

I am not so if I am reading the graphs correctly

 

Thats not a bad gain from the rockers alone. Still hardened pushrods are useless on the stock valetrain, if you ever miss a shift you want the pushrod to bend becuase if the rod doesnt bend when you miss a shift something else will bend and it isually is way more expensive and time consuming to fix than a simple pushrod replacement.

 

Are ther any recomendations for a rocker arm manufacture? Would going to a longer pushrod and holding the stock ratio of 1.7 be a better solution? Just looking at the breathing issue. I know I haven't addressed the valve springs. I under the impression that stock would take the push

 

A longer pushrod will do nothing except preload the lifters more. No additional valve lift will be seen.

 

Thanks, it seems new rockers at 1.8 are needed, stock push rods and dollars. Are there any recomended manuf. for the rockers? If not my son said Tera-Yellow were good.

 

I'd stay away from Yella Terras. I'm assuming that's what you meant by Tera-Yellow. Try a search on them on here if you'd like and see the reviews and issues people have had with them. The more I searched, the more turned off I was about them. But anyway, I had them (1.7s though) on my car and they just didn't work right for some reason, not to mention, they were loud as hell. I tried and tried to get them to work. I finally just went back to a stock rocker and all's well. Granted my engine is FAR from stock though. You may have better luck with them on your stock engine, but I think there are better rockers out there for much less money.

 

And by the way ditch the flowmaster. They are restrictive to say the least.

 

I will ditch the flow masters, I heard Magna flows are better. It was Yella Terras what I was talking about. Any suggestion on rockers?

It amasing how work gets in the way of learning.

 

Yellow-Terra have came out with another revision of the rocker arms where they did reduced the weight ontop of the valve spring. There are several topics about these rocker arms. THere were problems with the first set of Yellow-Terra Rockers and it was fixed with the second version.

Also you can get a MSD module that can control your revlimeter better then what the factory computer was designed for so you dont break anything else.

 

the vinci/crane 1.8 accelerated lift rocker kit comes with rockers, pushrods, guideplates, poly locks and screw in studs. you have to use the shorter pushrods that come with the kit.

http://vincihighperformance.com/superwebdeals.HTML

(rocker kit at bottom of page)
$669.00 for the kit. also, you should change the springs, so they can handle the new lift and accelerated motion. (spring kit above and left of rockers)

 

The ongoing arguement with Tilly. He says I would need to change the springs, running the risk of accelerated wear on the cam and could float the valves into the piston. Recomendation would be a FAST manifold. Comments

 

A FAST will also require a 90MM TB, that combo would run over 1k$. I have a FAST90 and I like it but I have a head/cam car.

 

doesn't the stock TB fit the 78mm FAST? then again, why buy it.

 

change springs, highly recommended.
accelerated wear on the cam, no. these are roller shafts, not flat tappet like the old days.
float the valves into the pistons, very unlikely.

i did the rocker and spring swap on the stock cam and ran it for over a year. beat the crap out of it at the track. including nitrous. click the pink banner, then timeslips