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Discussion Starter #1
The stock L-98 was taken out in July 2009, and the 421 was dropped in its place. I still cant believe it was that long ago, but such is life.

Most of you know how busy I have been the last several years hence why the car has not been top priority. I am even suprised that it has come this far.

Fast forward to April 2011, and the car has finally been started, and I absolutely love the sound of it. It idles at around 750 rpm which is a tad bit low I think. The tune is not bang on, but I believe its somewhat close. My engine builder Jim Barth who is a respected forum member of the CF will be flying in near the end of May to assist me in tuning this monster.

Originally when the 421 was first started the amount of blue smoke due to the start up lube, and the timing being off was certainly a stressful moment being the first high performance motor that I have had built for me. But after I got someone who was experienced in the FAST system, and the way I had it setup, the blue smoke went away at idle, and the idle its self calmed down, and my mind was eased a wee bit. If the motor was damaged in any way because of how much fuel was being dumped down on initial start up, I certainly would not be building another one. I doubt washing the rings wouldnt be a good thing.

The roads are still a little dusty so I wont be driving the car just yet, and it might still snow yet. The airfuel on the FAST on idle is in the safe range, but like I said it will need to be fine tuned, and I will be throwing it on the dyno in May for chits and giggles when Jim flys north to Canuckville.

Anyways here is a little video of the 421. I am sure I will have my issues, but if it goes like it sounds then I will be a happy camper and the wait will be worth it!

It sounds better in person, but I figured a video is better then nothing!

More vids to come down the road. Take care guys! :thumbs:

-4 Bolt Bowtie block
-AFR 195cc Eliminator Comp Ports
-11.6 CR.
-Callies Crank
-JE Pistons solid dome
-Crower Rods
-TPIS Miniram ported
-Comp Cam XE Hyd Roller 236/242 .62x/.58x
-1 3/4 Hookers to 3 inch Billy Boat SS exhaust with reasonators and mufflers




 

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Super nice car :thumbsup:

*Props* on a nice build
 

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If its the rings not completely seated on a new build like it appears to be, the exhaust smoke should be reduced if you seat/lap in, the rings to the cylinder walls,and that's best done by rapid repeated accelerating the car under load for repeated brief periods, Id suggest accelerating and then de-accelerating from about idle up to about 4500-5000rpm in each gear at about 3/4 throttle for about 20-30 minutes to completely seat the rings then do an oil change.
if that doesn,t reduce the exhaust smoke (IT SHOULD NOTICEABLY) then the valve seals might need to be replaced (even if new, as they may be defective or improperly installed
it also could be that the valve spring retainers lower surface at full valve lift are contacting the valve seals upper surface if the spring to guide clearance was not checked carefully

http://www.lunatipower.com/Tech/Valvetrain/ValveSpringTech.aspx
 

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Discussion Starter #7
If its the rings not completely seated on a new build like it appears to be, the exhaust smoke should be reduced if you seat/lap in, the rings to the cylinder walls,and that's best done by rapid repeated accelerating the car under load for repeated brief periods, Id suggest accelerating and then de-accelerating from about idle up to about 4500-5000rpm in each gear at about 3/4 throttle for about 20-30 minutes to completely seat the rings then do an oil change.
if that doesn,t reduce the exhaust smoke (IT SHOULD NOTICEABLY) then the valve seals might need to be replaced (even if new, as they may be defective or improperly installed
it also could be that the valve spring retainers lower surface at full valve lift are contacting the valve seals upper surface if the spring to guide clearance was not checked carefully

http://www.lunatipower.com/Tech/Valvetrain/ValveSpringTech.aspx
20-30 minutes?
 

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20-30 minutes?
IM suggesting you drive the car under constantly changing RPMS and loads to lap in the parts, for 20-30 minutes to get the components mated,
your rings and cam,lifters,rockers, bearings etc should lap in very rapidly in the first few minutes but it takes 10-20 minutes run time on most cars for the break-in process to wear in the component clearances almost completely, and if youve ever monitored the engine heat generated it tends to start dropping off after about 20-30 minutes, indicating the component friction levels have stabilized and lube flow is being maintained in MOST break-in procedures
 
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