How much power......

[Panamared]

How much power can I get from a L24 engine E88 head. (the most for street you can get)

I decided to install pacceseter headers 6 to 2 to 1. Crane XR 3000 ignition system and PS91 E Core coil. The distibutor is a Mallory unilite.

Im also looking for a good cam but the stock one for the moment.

Read in another post that the crane and the stage III from Motorsport Auto aren´t the best so I need to look for a good one first.

The carbs are SU. And the exhaust system is Monza.

Thanx:)

[jackboxxx]

heres a topic to read about that

http://www.classiczcars.com/forums/showthread.php?t=15669&highlight=building+L24

[Gav240z]

How long is a piece of string? Honestly it's such an open ended question it can't be answered easily. I suggest you read a book titled "How to modify your Nissan/Datsun OHC Engine" By Frank Honsowetz.

How much power you can make on the street depends on what you consider streetable. Rebello build engines however that are 280HP on SU's and I would consider those quite streetable.

[280z1975]

Everyone,

Is there any device out there that measures the horsepower created by the wheels at the wheel, but while being mobile? I know you can test these things with a Dyno.

In the bicycling world you have power measurement devices that measure your power output at the rear wheel via the hub flex and then coverting that measurement into wattage output.

I don't see why the principals of this concept can't be used and applied to measuring realtime and downloadable power output (along with other factors like speed, tach speed, torque and possiably altitude)

Some informatio on this measurement: http://www.analyticcycling.com/CycleOps/PowerTapFeatures.html

I am sure they have this idea implimented in F1 racing, but has the technology made it down to the consumer level at this point?

[240ZX]

You must be new to the car performance world! The device is called a dynomometer....or dyno for short. It measures torque output. There are engine dynos (measures output at the flywheel) and a chassis dyno (measures output at the wheels).

[280z1975]

You must be new to the car performance world! The device is called a dynomometer....or dyno for short. It measures torque output. There are engine dynos (measures output at the flywheel) and a chassis dyno (measures output at the wheels).

I am new to the performance car world ... I had always thought that Dyno was more a term related to testing on a big set of rollers as that was what I have always seen when people send a video of a Dyno test.

Thanks for the info.

[zguitar71]

225 HP at the crank with lots of money spent (professional head work from someone like Rebello)and lots of dyno tuning time, Tripples, a much bigger cam than a stage III. A 2.8 bottom end would be cheaper though.

[=Enigma=]

I am new to the performance car world ... I had always thought that Dyno was more a term related to testing on a big set of rollers as that was what I have always seen when people send a video of a Dyno test.

Thanks for the info.

That's exactly what it is. 240SX apparently didn't read your original post closely enough.

Well it won't measure power at the wheel but the nearest thing to a mobile measurement device that within most ppls budget is going to be a mobile accelerometer. These can give approximations of the sort of info, you;re looking for, but to get any kind of decent results you would likely have to input a fair amount of info such as air temp, relative humidity, weight of car with driver, figure tire slippage factor, etc.

http://www.gtechpro.com

http://www.beltronics.com/fx.html

[280z1975]

That's exactly what it is. 240SX apparently didn't read your original post closely enough.

Well it won't measure power at the wheel but the nearest thing to a mobile measurement device that within most ppls budget is going to be a mobile accelerometer. These can give approximations of the sort of info, you;re looking for, but to get any kind of decent results you would likely have to input a fair amount of info such as air temp, relative humidity, weight of car with driver, figure tire slippage factor, etc.

http://www.gtechpro.com

http://www.beltronics.com/fx.html

Power output is a tricky thing, but if they can measure it via the last possiable point of power loss for a bike (the rear hub as opposed to the road to tire contact point) why not on a car? The power measurement on a bike costs about 900 bucks and I would think someone might be able to incorporate this idea into a system that can be used on a car.

The system uses a sensor to measure two things, one being torque and the other is speed. Using these two measurements you can find out your instantanious power at any given moment.

The sensors for the bicycle measurement use strain guages which measure the finite 'flex and bend' in a given metal surface and then from there it can determine the rest. This sort of mobile, reusable and recordable system is what I am thinking about.

Something like this most people who are serious about thier cars would love to have and would be way more accurate and data enriched than a dash mounted accelerometer. It could be made for around $1,500 dollars I would suspect.

[kmack]

How much power can I get from a L24 engine E88 head. (the most for street you can get)

To give you a baseline to start with, I used to run a bone stock '73 L24 w/ E88 head, stock '72 SU's, and a 6-2-1 header w/ 2-1/4" exhaust. Motor had just over 200k miles, w/ leaky valve seals and possibly one set of bad rings. Pulled 127hp at the wheels [san Antonio, Tx, approx. 850' above sea level]

I then ran a stock '71 L24 w/ E31 head (orig to my car) w/ same carbs and exhaust. Pulled 137 hp at the wheels (w/ stock airbox) and 139 hp w/o airbox. [same dyno and shop as previous]

For these setups, this is quite respectable. A little bit of money in port work, cams, triple carbs, and a bigger exhaust (2-1/2") will net you more HP, but you probably won't get much past 160-170 hp at the wheels. Unless you throw some really BIG $$$$ at it.

[Panamared]

Thank You Guys.

Lots of good info in this tread. To much knowledge and experience.

Answer my question very clear.