My 88 Fiero GT 14k miles (Page 163/194)
BV MotorSports AUG 17, 12:25 PM
Why? Would the extra 12% lift be too much? Inquiring minds want to know!
Raydar AUG 17, 12:51 PM
My take on "high ratio" rockers is that they're a band-aid. They're designed to provide higher lift with an existing cam, without having to go into the motor and change the cam. They add variables that the cam/engine designer has not accounted for.

Especially in the case where the engine is out of the car and/or disassembled, just get the cam with the specs you want. Build the rest of the valve train to suit (correct springs and hardware. no binding or parts interference., etc.) and go.

(Having said all that... I know zero about 3800s. Just believe this to be true, in general. Certainly applies to the V6-60.)

Good luck with the new power plant.

[This message has been edited by Raydar (edited 08-17-2013).]

mattwa AUG 17, 02:31 PM
A ST2 cam AND 1.85 rockers is too much lift for the springs, either the coils with bind or the retainers will hit the seals, and both are not good. As others have said, it was my impression as well that, at least on a 3800 if not most engines, you get either a cam, or rockers, not both.

[This message has been edited by mattwa (edited 08-17-2013).]

BV MotorSports AUG 17, 04:10 PM
A quick crunch of the numbers I am currently @ .512 lift (.320 tappet) with stock 1.6 rockers. With the 1.85 I would be bumped up to .576. So unless the "yellow" LS6 springs can handle more than .600 of lift, they are a no go. I also have a set of the blue LS springs as well.

Edit: looks like the LS6 springs are only good for .560-.570.

[This message has been edited by BV MotorSports (edited 08-17-2013).]

BV MotorSports AUG 17, 05:18 PM
BV MotorSports AUG 18, 02:09 AM
Trust me on this. Dont skimp out and use silicone instead of gaskets when installing a ZZP (or similar) w2a intercooler. Nothing short of a nuclear bomb is going to separate the intercooler from the intake. Holy %&#$!!!!! Knowing how much grief it gave me and Charlie to get them apart from when Dean and Bob the engine builder didn't know what gaskets were, I cant believe Charlie used silicone. Damn it!. I literally just had to unbolt the lower intake from the heads to get the entire assembly off the old engine. Wonderful.
NoMoreRicers AUG 18, 02:58 AM

quote
Originally posted by BV MotorSports:

Dont skimp out and use silicone instead of gaskets when installing a ZZP (or similar) w2a intercooler.



Duly noted.
BV MotorSports AUG 18, 10:17 PM
Engine is out. I am about 1/2 way with swapping everything over to the new motor. I swapped in my ST2 cam (has 3311s engraved on the end) and got the valvetrain in place.

Here is a good question. Balance shaft to cam is dot to dot. That is the easy one. Eyeballing the cam to crank dots is a different story. I set the engine to TDC before I started the break down. I am 90% sure I have the cam to crank dots pretty close. its just hard to eyeball it since they are pretty far from each other. Only thing I can thin kto do is try a plumb bob or something. Suggestions?

Hey Scott you'll love this. The oil bypass spring was very sticky in the bore. I had to pull it out with pliers (old engine).


Before


After


Dots


[This message has been edited by BV MotorSports (edited 08-18-2013).]

Justinbart AUG 18, 10:31 PM
I would put in a rollmaster double and 130# springs if I were you.

------------------
Turbo 3800 E85 F23 5spd spec5
11.17@132.6

BV MotorSports AUG 18, 10:42 PM
I thought the LS6 springs were plenty for the ST2? Otherwise, I would of had to go with 130# springs which forces you to run the double roller like you suggested.

[This message has been edited by BV MotorSports (edited 08-18-2013).]