Induction System - Rans S-21 OUTBOUND Text Manual

RANS S-21 OUTBOUND
TRIMMING THE AIR SCOOP
17. After the cowling is fit up to the boot cowl, the two halves will be joined on the
intercooler itself. This will allow you to position the outboard air scoop up tighter
to the cowling. The top and bottom cover of the inboard half will pull up tight to
the intercooler. The top and bottom cover will require trimming to fit to the
cowling, leaving a small gap for the trim lock to make the seal to the cowling.
The bottom cover will require more trimming than the top.
18. With the lower cowling on, pull the covers over to the cowling and mark for
trimming, use a pair of hand shears and trim the cover.
19. Once the top and bottom covers are trimmed to fit the side of the cowling, the
outboard air scoop can be pulled over to the cowling along with the top and
bottoms covers for a nice, tight fit, leaving about 1/8" gap for the seal. Transfer
drill the holes of the outboard air scoop to the top and bottom cover. Debur and
rivet.
20. The intercooler airbox can be painted if you desire. After assembly or paint, cut
lengths of the trim-lock cushion lip to fit the top and bottom cover, as well as the
outboard air scoop's vertical edge. There is no need for the seal on the forward
edge of the inboard air scoop.

INDUCTION SYSTEM

(AFTER INSTALLATION OF INTERCOOLER)
21. After the intercooler is mounted, you will need to trim silicone hoses and metal
tubing to fit the induction system. Be diligent in not wasting any of the silicone
hose. Cut all the silicone hoses as per FIGURE 11-05B/915iS. The larger drop
off pieces from the 90-degree elbows will be used as well, do not discard.
22. To cut the reinforced silicone hoses, use a sharp razor blade and one of the
supplied hose clamps. Slide the hose clamp onto the silicone hose and measure
from the end of the hose to the edge of the clamp. The edge of the clamp will
serve as a guide to help keep your cut edge straight. Tighten the clamp. Lightly
cut around the hose, do not cut all the way through in one pass, this will be more
difficult to cut straight. You can also clamp a small piece of the metal intercooler
connecting tube inside of the silicone hose, this will help the silicone hose from
collapsing from pressure while cutting.
TEXT MANUAL
NOTE: This may need to be done a few times to get it right. The
top and bottom cover's aft edge will pull all the way to the
intercooler.
CAUTION: Measure twice and cut once.
CAUTION: Do not cut all the way through with the metal tube inside
the silicone hose, you will damage the metal tube and your razor
blades edge. Remove the metal tube before making your through
cut.
14-15
09/11/2018