Estimated horsepower

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eduardocastrejon
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Joined: Sat Jun 19, 2010 4:42 pm

Estimated horsepower

Post by eduardocastrejon » Sun Jul 02, 2017 1:06 pm

Hi,

Please help me with this
I dont have acces to a dyno
I know that its difficult but please try
My goal was 150hp at 6500rpm

2110cc
82x90.5
9.5 cr
44x37 wedge ports
C45 cam
1.25 rockers
Cb 48mm ultra competition fi
Cb light weight lifters
Straight cut gears
1 5/8 sidewinder exhaust

R&p 3.88
1. 3.16
2. 2.0
3. 1.47
4. 1.17
5. .88
Zf lsd
Last edited by eduardocastrejon on Mon Jul 03, 2017 7:11 pm, edited 1 time in total.
2110cc type 1 BEETLE
914 - 916 Look
BMW Motorcycles

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Tony Z
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Joined: Wed Aug 30, 2000 2:01 am
Location: Cape Town, South Africa

Re: Estimated horsepower

Post by Tony Z » Mon Jul 03, 2017 12:45 pm

I would be very surprised if you have less than 150hp. I think you have hit your 150hp target and more.

I am getting 195hp out of a 2332 with a bigger cam than yours, but with carbs and the same heads and same exhaust. So you definitely have the potential to easily hit 150hp

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eduardocastrejon
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Joined: Sat Jun 19, 2010 4:42 pm

Re: Estimated horsepower

Post by eduardocastrejon » Mon Jul 03, 2017 7:06 pm

Thanks for your answer

Some say that is a waste this heads with my combo, that i need more cr and cam
Engine runs great, car is fast and streetable
I'm happy but i supose never is enough :)

What compression is enough to this heads to flow properly
I supose that i can raise cr to 10 and isntall 1.4 roller rockers (.545" lift with my cam)
This heads supose that are for a max lift of .520" but can be upgraded to .630" with 650 springs and retainers
What cam do you have ? , did you change Springs ?
2110cc type 1 BEETLE
914 - 916 Look
BMW Motorcycles

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Tony Z
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Joined: Wed Aug 30, 2000 2:01 am
Location: Cape Town, South Africa

Re: Estimated horsepower

Post by Tony Z » Thu Jul 06, 2017 11:31 pm

I think 9.5:1 is fairly high already. Maybe not high enough, but going to 10:1 wont really make a big difference

I have a 2332 with an 86C cam and 10:1 CR. I originally built it with an 86B cam but later swapped to 86C - when I did the change, I didnt change the heads at all. I might have increased the CR a little if I built it originally for the 86C.
But, my car is fully streetable, pulls without effort from 1300rpm in 4th (freeway flyer ratios).
I am using the cheap $30 CB dual springs with a light valve train - titanium retainers, light followers and AC.net aly pushrods. Rev limiter is at 7000rpm and I have never floated.

If you are happy, dont worry about the numbers and dont listen to the masses who say it should be different. Most of them havent even driven a HP beetle.

farmer
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Joined: Fri Dec 07, 2001 3:01 am

Re: Estimated horsepower

Post by farmer » Fri Jul 07, 2017 1:08 pm

I bet it revs high. But you´ll be surprised to how "little" hp and torque you really have. I´d say 150 is not that far off, +/- 5-7 hp. The reason is that the heads are too large for the combo, and the valves are very inefficient on the cylinder wall side, resulting in poor fuel mix and poor cylinder filling. Bump displacemet to 2275 (94 Bore) 9,5 CR and it will really come to life. You can run the C45 with 1,4 rockers, but I´d suggest 1,3 or the valve accelleration becomes a little harsh.
T

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eduardocastrejon
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Re: Estimated horsepower

Post by eduardocastrejon » Sun Jul 09, 2017 10:59 am

I read that scat rockers have more lift that advertised

1.25. = 1.33-1.39

I need to measure lift but probably i already have 1.3 rockers

About cr i can raise to 10

I have new 90.5 pistons with total seal, then i will use it at is until i need to replace it
2110cc type 1 BEETLE
914 - 916 Look
BMW Motorcycles

farmer
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Joined: Fri Dec 07, 2001 3:01 am

Re: Estimated horsepower

Post by farmer » Mon Jul 10, 2017 1:25 am

Sometimes, yes. But you will have to check.
going 10-1 CR requires 98-99 octane with the C45. If you have easy acces to that there should be no problems as such.
BUT, if the engine is not assembelled yet I strongly suggest that you increase displacement or find another set of heads. It is not a good match.

T

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eduardocastrejon
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Re: Estimated horsepower

Post by eduardocastrejon » Sat Jul 15, 2017 9:47 pm

Today I measure the lift
I have .500 I suppose I little more because I don't took out the gap

C45 cam have 390 of Lift
390x 1.1. = 429
390x 1.25 = 487
390x 1.3. = 507
390x 1.4. = 546

I suppose that I have 1.3
2110cc type 1 BEETLE
914 - 916 Look
BMW Motorcycles

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