Road Racing / Autocross & Time Attack Road Racing / AUTOX, HPDE, Time Attack

Performance comparison...

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Old Aug 16, 2005 | 07:08 AM
  #1  
^AnDre^'s Avatar
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Default Performance comparison...

Which would be more suitable for a track ( im pretty sure I know the answer, but just looking for how comparable they are becuase cost is DEFINATLY an issue here).

Which would be better to run on a track,

b18b pushing out 180 hp at the wheels with a civic cable tranny with lsd.
or
b18c1 pushing out 180 hp with the same tranny (if its possible to use a cable tranny on that engine?)

Reason why I say that engine is becuase I already have it, otherwise which would be a more suited tranny for racing. Remember cost is an option here and I already have most of the stuff to build the b18b up to 180hp and the tranny whereas i have to spend 3000 what not to get the gsr in and push 180 at the wheels with it.
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Old Aug 16, 2005 | 07:10 AM
  #2  
^AnDre^'s Avatar
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Default Re: Performance comparison... (^AnDre^)

forgot to also mention the b18b is still non-vtec and I dont plan to convert it because it would probally be cheaper to just get a gsr or type r than to do all the building up to get it up there (i.e. hi comp pistons, con rods, full race port head, intake, headers, etc)
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Old Aug 16, 2005 | 07:26 AM
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Default Re: Performance comparison... (^AnDre^)

hi there.

i used to road race my H1 car with a built up B18A/B motor (LS non vtec motor). it took ALOT of work and tuning to get the car to make 178 whp. it was a great powerplant, tho. very reliable and torquey and fun....

i have a question for you; how are you planning on using a "civic cable tranny" with a B series motor? i think you need a B series tranny to mate to any B series motor (B16A,B or B18A,B,C).

i used a 2000 SI tranny on my racecar (B16A2 engine in the 2000 SI with hydro tranny). that was a good choice for close gearing with the LS motor.

if you need to use a cable tranny, you will need to find an early B16A cable tranny from japan, or perhaps a 92-93 GSR cable tranny....

good luck

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Old Aug 16, 2005 | 07:57 AM
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Default Re: Performance comparison... (^AnDre^)

For a HPDE/track car, but not actually a race car... Use what you have, keep it reliable.

For a race car... Depends on the rules.

Either way, take care of safety gear first, then suspension and brakes, tires, then horsepower.

180hp in a Civic and you will start to have brake issues - which brakes dose your car have now?
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Old Aug 16, 2005 | 08:00 AM
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Default Re: Performance comparison... (Todd Reid)

Todd is right the cable tranny bolting up to a B18C1 is not issue at all. And for which one is better. If they have equal horsepower the B18B is going to have more more torque than the GSR motor down low and in the mid range assuming peak horsepower is the same.
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Old Aug 16, 2005 | 09:51 AM
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^AnDre^'s Avatar
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Default Re: Performance comparison... (Mattamotor)

my question is about the rev's though. I know if the hp numbers were matched torque in the b18b would be higher. Im just concernetd about the rev's, becuase with the 142 hp we had in the b18b is with a 9lb flywheel and the cable lsd civic sir tranny (which ever it is i cant remember civic sir or civic type r.. if it even exists). Playing with the extra revs, would it have more of an advantage over marginally higher torque?

I'm inclined to think the gsr would be better becuase the rpms would give you higher speed. For example, taking both setups and accelerating to 100kmh or mph, which would do it faster with the same power, due to the simple fact of non-vtec vs vtec with the same short ratio gearbox?


also fyi, the car is already set up and it is a solo 1 racer right now and occasionally a sprint regional racer which will still comply with regulations with these modifications being that its based only upon power to weight ratio.

Brake setup is gsr 10.3" rotors with the 1 piston calipers, hawk blues, steel braided lines, and moutol 600. So far it is more than enough for a 90 civic si fully gutted with a rollcage.
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Old Aug 16, 2005 | 09:52 AM
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Default Re: Performance comparison... (^AnDre^)

sorry i didnt fiinsih my first point.. with the setup now it just climbs through the gears like theres no tomrrow, compared to the ls tranny it had before in it.
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Old Aug 16, 2005 | 10:11 AM
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Default Re: Performance comparison... (^AnDre^)

Personally, if the car is an autoX car, keep the B18b. Higher RPM's dont mean higher speed as long as peak power is the same for both engines. Generally you can make more power the higher you rev because the engine has the ability to move more air at a higher RPM.

If you already have the B18b in the car, and everything is set-up, why change anything? Concentrate on seat time, not HP!
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Old Aug 17, 2005 | 11:13 AM
  #9  
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Default Re: Performance comparison... (prkiller)

why change anything, becuase the motor is blown and now I have to decide what to do next.
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Old Aug 17, 2005 | 11:15 AM
  #10  
^AnDre^'s Avatar
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Default Re: Performance comparison... (^AnDre^)

I have to decide should I go with something like a b20 block and gsr (or type r) full race port head, headers and Im, and valves, and cam, or a gsr and do little work and have it have 180 whp (both engines will be 17-180 whp at the end)
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