Dialing Camshafts

hombre

hombre

Nitrous
Joined
Dec 31, 2006
Messages
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There are benefits to be gained from resetting the camshaft timing on FA R3s. Nev also reported benefits on NA R3s. The hardest parts about dialing the R3 cams were finding TDC to set the degree wheel, and finding good positions for the dial gauge. I had to fabricate an extension for the piston stop in my dial kit because of the deep recess in the top of the R3 piston. Getting the dial gauge feeler around the cam lobe and at the correct angle on the valve bucket also tricky as hell.
 
Here's my modified piston stop to work with the R3 piston (end drilled and tapped for bolt extension):



With my latest cam timing, I'm now running a Lobe Separation Angle of 112 degrees, which is the minimum recommended for supercharged engines. Previously I was running a 103.5 degree LSA per Nev, which is suitable for naturally aspirated engines. The greater LSA means less valve overlap, which should translate into more power in a SC R3. We shall see... looking for 4 - 5% increase. :cool:
 
dailing in

its going to work.hope you can feel the difference,it will be better all round and rev better .excellent work . let me kn.ow how it goes,then send tool over.jtr3
 
Cam Timing Pistons

We have plenty of documented performance reports on both A/NA engines.

My question mainly for the NA crowd, with such a low compression level 8.7,

if I remember correctly. Why hasn't anybody looked to higher compression

levels, pistons, etc. It would seem there would be some untapped HP in

the stock configuration. Answers???
 
mjbell1@rcn.com said:
We have plenty of documented performance reports on both A/NA engines.

My question mainly for the NA crowd, with such a low compression level 8.7,

if I remember correctly. Why hasn't anybody looked to higher compression

levels, pistons, etc. It would seem there would be some untapped HP in

the stock configuration. Answers???
Click to expand...

Answers: High compression R3 pistons (with suitable cams) have been available from Neville Lush Racing for some time now. Trirocket3 in Britain (Les) has recently dyno tested a naturally aspirated R3 with Nev's goodies at 207 RWHP, with 177 Ft Lbs torque. Interestingly, Les used a greater than stock LSA recommended by Nev to achieve this.

MJ, PM me an email address and I'll point you towards these high compression charts.
 
roosie said:
hey hombre that a tuned set of headers there.can you send pics or tell me where to get them made up.thanks roosie
Click to expand...

Roosie

I built them to specs generated from computerized exhaust programs for my supercharged R3. The exhaust flanges are from Neville Lush Racing, and the 304 stainless tubing and collector muffler from Burns Stainless. I cut and ground the tubing, which was then welded by a pro.

Read: http://www.r3owners.net/custom-mods/3569-equal-length-routing.html

and: http://www.r3owners.net/custom-mods/3605-pure-power.html

and: http://www.r3owners.net/custom-mods/3549-merge-collector-muffler.html
 
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