4" vs 4.125" stroke vs timing w/N20?
10-26-2011, 08:13 PM
#1
4" vs 4.125" stroke vs timing w/N20? Gonna start a new build for a 400+ N20 shot shortly. Will be using a RHS 9.240" deck block with 4.125" bore. I'm considering using a 4.125" stroke to get a few extra cubes. My question is with the slower piston speed at TDC do you need more timing or less as compared to a 4" stroke? Will I be able to get more HP per cu in with the longer stroke?
10-26-2011, 08:52 PM
#4
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I'm running. Rules are on HPJ in the draggin right section. Same as most TS best 3 pass average no working on the car after the cruise. They're alowing people to put slicks on after the cruise though.
10-27-2011, 10:18 AM
#7
Piston design.
If your buying all new stuff why not use a tall deck and bigger stroke?
Cubes are a big help for N20 motor.
Our old std. deck motor we used a 3.9 crank for better piston.
I wouldnt trade 10-15 cubes for a good piston, you can make that up with nitrous.
Our tall deck motor is the best of both worlds... 4.25 crank and a strong piston.
If your buying all new stuff why not use a tall deck and bigger stroke?
Cubes are a big help for N20 motor.
Our old std. deck motor we used a 3.9 crank for better piston.
I wouldnt trade 10-15 cubes for a good piston, you can make that up with nitrous.
Our tall deck motor is the best of both worlds... 4.25 crank and a strong piston.
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10-27-2011, 06:02 PM
#8
I would love to go tall deck but I'm trying to do the impossible....go fast with the stock SS hood. I just love the sleeper look. On the other hand I'm not trying to be competive in X275 but looking to go some 5.30-5.40's for local King of Street stuff.
10-28-2011, 08:23 AM
#11
A couple small local tracks have King of Street races with 50 mile cruises. Not too many 5.0 hitters attend. A 5.4x car has won the last 3.
Justin, I talked to you some at Civil Wars and appreciate you taking the time to answer my questions. That is a sharp car you have...bumper to bumper!
I thought you said you were running a 4.100" stroke crank? 436 cubes?
Justin, I talked to you some at Civil Wars and appreciate you taking the time to answer my questions. That is a sharp car you have...bumper to bumper!
I thought you said you were running a 4.100" stroke crank? 436 cubes?
11-09-2011, 01:23 AM
#14
I dunno most of the cars that run in our local KOTS series Justin is referring to are well put together machines. The ones with 16v batteries might be iffy, but thats about it. If they were a/w intercooled w/ no radiator yes, they couldn't, but they are almost all nitrous cars in that series.
