Motor Only RWHP Numbers

[Maverick The Electrician]

I was going through some other threads about motor RWHP numbers so I thought I would chime in on several cars here in Houston. SW's all motor car that ran a 10.08 at the Viper Nationals almost makes 700 RWHP. Norm K's car ran a 10.46 first time back to the track all motor. I think somewhere in the 650 range for now, I know they are trying new things, and Rohn K's (1st place unlimited) car made 625 RWHP with colder plugs and the car is set up for Nitrous. 575 on motor only is a heads and cam car.

 

[Moundir]

Nice, how about your car Albert? How much rwhp does it have Na and on the juice? Btw I've seen your car and heard it, and sounds pretty [******] good. Who did your work, and how is the drivability? I got a 0 % apr I'd like to take advantage of

 

[HP]

I think Albert decided to detune his motor, before selling his car -
I saw his heads in the classified section.

 

[LTHL VPR]

Very interesting question, but the replies could be misleading...
There is 'much to think about' when you are saying all motor RWHP numbers. Are you speaking about peak numbers or average rwhp numbers. Are you talking about pump gas or race gas. Is the car set up for the street (good drivability) or the dragstrip/track (poor drivability around town in the low-mid range).

For example we made consistently made 650+ rwhp/715rwtq on pump gas on my LETHAL 750. We were also making at least 600 rwtq from around 3000rpms through redline. My car drives VERY good as a street car in traffic, etc...

Could we have made better power? Sure, absolutely, but it would have sacrificed our mid range power/torque numbers and drivability would have definitely suffered at least in our case/package.

Likewise, a car that runs on only race gas or is designed for the strip/track could potentially use very high compression and a very aggressive camshaft profile as the car would seldom, if ever, be driven off idle, and in the low-mid range of the rpms. Likely this car would have very strong peak numbers, but have less strong mid range numbers.

So, I guess what I am trying to say, is that it depends on how the car is used and the ultimate goals. For me, drivability was key, and so was the ability to run on pump gas. I would think that a car designed for more extreme purposes should be able to make higher numbers.

My $.02

Either way, I am all 'eyes'...Let's see what people have accomplished thus far...
-Wayne

 

[Maverick The Electrician]

Moundir, LOL my car was a pig on motor. I ran 10.90 many times with the car set up for nitrous, but there wasn't much left in it even if I changed plugs etc. It made 560-570 RWHP on motor. That was with stock compression.

HP, I still have the car, but if the heads sell, I am going to bring it back to stock and maybe sell it. I have no time for anything since my company has more than trippled in size this past year. I am still planning on going to all the events and running Rohn's car, also will be spending time getting him behind the wheel.

LTHL VPR, The best way to show what a car can do is get it to the track. Apex seems to have great numbers on the dyno, I would like to see on run with the big dogs. I think one of the city's the are tryiong to host a drag event is in Vegas, you guys should test and try and make it to the event.

 

[Torquemonster]

What Wayne says is right - but a radical engine can still be streetable - if not as civilised as a stocker....

A 500+ cube engine can be built to run very strong from 3000-7000rpm and yet still be driveable above idle. Vacuum suffers but there are ways to improve that... ways few bother with but work.

In short - an all motor could be built to make massive power - it will not behave as strong as the stock engine from idle to 3000rpm, but it'll spank it stupid from there up.... that calls for a gear change - dropping the rear gears substantially, and dropping 5th and 6th ratios to useable ratios - would recover lost torque on the bottom end and multiply the top end.

A 500+cube engine can be made to "behave" in traffic etc with cams as big as 280 degrees @ 0.050" valve lift (that's big by the way). Such an engine will not be like a stock one, but will be driveable. Everything is in the tuning and the limiting factor will be durability of hard parts...

As Wayne says - an engine can be built depending upon end use desired. A motor that only sees 5000 miles a year could be built well over 100hp/litre.... for a price

My 2 cents

 

[Daffy Duck Viper]

I like Wayne's brain - it's a good solid brain - the way it deals with Viper performance.

As for you, Torquemonster, you have too much knowledge in every area to keep up with. *chuckle*

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