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Re: Red Box or not...not
Posted by JohnK (more from JohnK) on Wed, 8 Feb 2006 06:55:56
In Reply to: Red Box or not, 88900T, Tue, 7 Feb 2006 21:07:59
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Red Box is red and will be different for an 88 SPG. But I would take your old box and tweak it to greater performance than a stock red box. Thousands of posts on the subject here and on the Performance BB. You can simply adjust the P and F potentiometers in the box or replace some resistors.
Sounds like the SPG junkyard box is either bad or you didn't plug it in cleanly. Pull the cover and take it apart to check for bad connections between the plug and the circuit. Also look for corrosion on the pulg contacts.
Set you base boost to 5.5-6.5 psi by adjusting the wastegate rod. Tweak the box as suggested, put in a 3.0 FPR(stock FPR for NA 900's), and you will have better results than a Red Box. Before I learned about this, I put in a Red Box only to end up tweaking it. The Red Box is a mild upgrade and came with a modified distributor in a Performance Kit. Not a big deal but the Red Box looked good.
After those tweaks, you can file off a bit of the retard stop in the distributor control module(on the side of the dist) to get more retard under boost. Then you reset base timing to 20BTDC. Next, you put in bigger injectors. Finally, replace your transmission because the higher torque will have worn out the pinion bearing.
posted by 208.208.152...
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