Tick polluter stage 3 with a carb
01-16-2015, 09:47 PM
#1
Teching In
Thread Starter
Join Date: May 2011
Posts: 24
Likes: 0
Received 0 Likes
on
0 Posts
Tick polluter stage 3 with a carb Have a 370" LQ. Victor junior. Ported 243s. Anyone running a tick stage 3 polluter 239/244 | .62x”/.59x” | LSA111+2 ??????
Duration seems right to me for a 7000 rpm max build.
Duration seems right to me for a 7000 rpm max build.
01-17-2015, 05:46 AM
#3
Teching In
Thread Starter
Join Date: May 2011
Posts: 24
Likes: 0
Received 0 Likes
on
0 Posts
3200lbs 66nova 4000stahl. I'll put in whatever gear it would need my guess would be either 4.10 or 3.90. Use is street strip. 95% street as the closest track is 2 bridges and 100 miles each way. I would like to throw a 150 shot on. Yes I have forged Pistons with reliefs. 100% running stock rockers with trunion upgrade. I realize I can run more lift bc of my reliefs but don't know if I care to lol. Want street manures and power and valve train longevity. Everything's a trade off that I understand so I was thinking this cam does it all.
01-17-2015, 05:47 AM
#4
Teching In
Thread Starter
Join Date: May 2011
Posts: 24
Likes: 0
Received 0 Likes
on
0 Posts
01-17-2015, 07:22 AM
#5
3200lbs 66nova 4000stahl. I'll put in whatever gear it would need my guess would be either 4.10 or 3.90. Use is street strip. 95% street as the closest track is 2 bridges and 100 miles each way. I would like to throw a 150 shot on. Yes I have forged Pistons with reliefs. 100% running stock rockers with trunion upgrade. I realize I can run more lift bc of my reliefs but don't know if I care to lol. Want street manures and power and valve train longevity. Everything's a trade off that I understand so I was thinking this cam does it all.
The cam that you mention in your opening post was formulated for cars equipped with a factory style, long runner EFI intake. Being that your car is equipped with a Victor Jr., the intake tract becomes several inches shorter. This change in intake runner design and length changes the optimal intake valve close timing.
If you look at the valve events of the cam you mentioned above (239/244 | .62x”/.59x” | LSA111+2) you see this:
10.5 degrees BTDC - IVO (Intake valve open)
48.5 degrees ABDC - IVC (Intake valve close)
55 EVO degrees BBDC - (Exhaust valve open)
9 EVC degrees ATDC - (Exhaust valve close)
If you look at the number in red, the intake valve close, it is 48.5 degrees. That is great for a max effort 5.7 or 6 liter with a long runner plastic intake. But, for a 6 liter equipped with a Victor Jr with a 7000 RPM max, it is really too late. For a 6 liter with a Victor Jr with a 7000 RPM max, the best running combos that I see have an intake valve close from 42 degrees to 45 degrees. In addition, you have to consider the stall converter, gearing, weight and compression ratio. With 10.5 compression and a 4000 stall at your weight I would pick an intake valve close of 43 degrees.
Now, the rest of the valve events for the camshaft that you listed really aren't too bad. You could literally just move the intake close to near 43 degrees and run the that creates which would be:
233/244 109.5+ 3.5
10.5 degrees BTDC - IVO (Intake valve open)
42.5 degrees ABDC - IVC (Intake valve close)
55 EVO degrees BBDC - (Exhaust valve open)
9 EVC degrees ATDC - (Exhaust valve close)
Now, you may be tempted to say that is not enough duration, but I can tell you that a Victor Jr will move the RPM peak up 300-500 RPM over the EFI style intakes on an LS engine. Also, the cam in my car is actually smaller than the one above and it moves my #3700 car into the 10s in good weather. However, that is not to say that you cannot add more duration, you can by opening the intake valve sooner, but as you do, you add overlap which leads to a rougher, race style idle that also brings poorer drivability.
So, if you like Tick, you can call them and talk to Martin, he can get you a custom cam like the one above no problem. Or, Cam Motion has a cam that is a really nice fit for what you are doing:
http://store.cammotion.com/big-lope
Ignore the RPM range listed on the website for this cam. In your application, this cam will have a usable RPM range of about 3000-7000 RPM and will favor a 4000-4500 converter.
01-17-2015, 08:21 AM
#6
Teching In
Thread Starter
Join Date: May 2011
Posts: 24
Likes: 0
Received 0 Likes
on
0 Posts
Ok I got ya. Thanks for the help. If up understanding correctly this cam would be a good fit as well http://www.summitracing.com/parts/hr...make/chevrolet
Trending Topics
01-17-2015, 04:22 PM
#10
Teching In
Thread Starter
Join Date: May 2011
Posts: 24
Likes: 0
Received 0 Likes
on
0 Posts
The cam motion "got lope" has my attention as well. Didn't think to check them out b4 you posted the link. They seem to have a few more carb friendly cams then others out there. As for howards Ive dealt with them. Stand up company.
01-17-2015, 09:26 PM
#12
Teching In
Thread Starter
Join Date: May 2011
Posts: 24
Likes: 0
Received 0 Likes
on
0 Posts
