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Old 09-10-2009, 08:32 AM   #1
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Default Novarossi 421B

NOVAROSSI "421" Turboplug Long Stroke 21. OFF ROAD S421BSX/1


Displacement 3.5 cm3
Maximum power 2.65 hp
R.P.M. (M.P.) 33.000 rpm
Practical Range 6.000÷ 38.600 rpm
Bore x Stroke 16.26 mm x 16.80 mm
Ports nr. 8
Piston type Die-cast
Crankshaft Ø 14 mm Crankshaft Type SG
Glow Plug Type Turbo
Exhaust Type Rear

How do you feel this engine? I intent to buy one. But in my club, no-one used it before.
Would you like giving me some ideas?
Thanks all!
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Old 09-10-2009, 09:10 AM   #2
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Originally Posted by AK_Nguyen View Post
NOVAROSSI "421" Turboplug Long Stroke 21. OFF ROAD S421BSX/1


Displacement 3.5 cm3
Maximum power 2.65 hp
R.P.M. (M.P.) 33.000 rpm
Practical Range 6.000÷ 38.600 rpm
Bore x Stroke 16.26 mm x 16.80 mm
Ports nr. 8
Piston type Die-cast
Crankshaft Ø 14 mm Crankshaft Type SG
Glow Plug Type Turbo
Exhaust Type Rear

How do you feel this engine? I intent to buy one. But in my club, no-one used it before.
Would you like giving me some ideas?
Thanks all!
excellent engine , very near the same as the s821b engine that has been discontinued as well . more recently though

www.houstonsengineservice.com and read what i say about the 821b
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Old 09-10-2009, 08:01 PM   #3
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Thank houston!
My friend, he said that 421B is better than 821B, is that right?
My brother had a 821b engine and it had been working very well untill now. And 421B has two kinds, one is turbo and another is standar, which is better?
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Old 09-10-2009, 09:53 PM   #4
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Originally Posted by AK_Nguyen View Post
Thank houston!
My friend, he said that 421B is better than 821B, is that right?
My brother had a 821b engine and it had been working very well untill now. And 421B has two kinds, one is turbo and another is standar, which is better?
whichever plug you prefer really
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Old 09-10-2009, 10:00 PM   #5
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Hix hix, i haven't used turbo yet so i don't know which can make my engine stronger.
turbo and standar, are they the same, not have different?
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Old 09-10-2009, 10:03 PM   #6
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Hix hix, i haven't used turbo yet so i don't know which can make my engine stronger.
you will find a performance gainwith the turbo when properly tuned
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Old 09-10-2009, 10:08 PM   #7
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Originally Posted by AK_Nguyen View Post
Thank houston!
My friend, he said that 421B is better than 821B, is that right?
My brother had a 821b engine and it had been working very well untill now. And 421B has two kinds, one is turbo and another is standar, which is better?
we have had great luck with the C6tgc, and 97T, the Nova plug=C6TGC has a more forgiving tune for most people, the 97 just a tic less on tune, I like the C6TGC if you where wondering where to start. (TURBO)
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Old 09-10-2009, 10:11 PM   #8
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If you could find one of the original 421's like the one in the picture I would get it. I had one of the originals and it was one of the baddest motors I ever owned. A lot of torque down low and an unreal top end. Made a real nice sound on a 200 ft straight.
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Old 09-10-2009, 10:13 PM   #9
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If you could find one of the original 421's like the one in the picture I would get it. I had one of the originals and it was one of the baddest motors I ever owned. A lot of torque down low and an unreal top end. Made a real nice sound on a 200 ft straight.

you should here them in an oval car wickedman
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