Highlander

He showed me 6 slips.. the slowest being a 10.6@133mph.. the fastest being a 10.3@ 136mph

Julio

Listen, I am not saying you have a slow car. And that you didnt beat a 10 second car...

But when your car in closed conditions does the time..and you get kicked out..thats when reality is what it is. Until then you have a fast car with no real basis but seat of pants.

I have too beaten plenty of 10 second cars.. just cant get that 130 MPH slip..just yet.

If the tune is in deed correct, shouldnt take you but a trip to the track, run a 12.3 at 130.. bada bing..done

End of story

Until then..its all keyboard drag racing

Highlander

Not true.. there is so much to the 1/4 mile than just that... I personally cant get any less than 2.4 on the 60' times... and the best 8th has been 8.9s. So not good... If I would have raced with him that day of the 118 I would have gotten beaten, that is for sure, my car had so much problems that day, which were fixed.. Anyways...

I cant use slicks.. my clutch wont hadle it... and I have an AL flywheel which is too light for slicks... I would need 28" to get the 130 traps with my 4.11 diff, and I launch in second gear to avoid 5 shiftings... If I change my flywheel and clutch I bet I can... but till then... I wont get there

Julio

Actually cars that dont hook typically MPH better than cars that do hook. So a 2.4 60 foot will still get you way into the high 120's easy as pie with 600 RWHP. Were measuring accelleration after its hooked.

If your clutch cant handle 600 RWHP..if the tires cant handle 600 RWHP..if the rear cant handle 600 RWHP .. then the car cant make 600 RWHP.. else it breaks when it does.

Look a viper runs 12.2 at 118. 450 RWHP with a 2.0 60 foot

Now if we're dyno racing.. that another story.. look at Supras..even they can get way into the 120's with less.

Till the slip is there..there is no pudding

Highlander

That is true... but the 600rwhp applies when you are over 100mph also and with 600rwhp and good tires you dont spin them at 100mph, which was why I put a 4.11 to get to 150mph in 5th gear @6200rpm... and max out there ... and the 600rwhp help though..

BOOST FED 95Z

[QUOTE]Keep in mind, that all dyno's are different. Not only that- but a real 600rwhp should net at least a 140 mph trap speed in a 3500 lb car.

My buddy Vince runs 160+ in the 1/4 and makes "only" 720 rwhp. Makes ya wonder about some of the "1000 hp" guys out there that can't bust 130.

Of course, who am I to talk. I'll be lucky to bust 120 this year on the temp setup. lol

Steve

My buddy's 4v Cobra makes 634 rw and traps 132-133....Car weighs around 3200 lbs.
Scott

Highlander

I know of a cobra 4v that has 602rwho and traps 128

11.1@128

rskrause

Guys: there is no magic or mystery to the relationship of trap speed and rwhp. Unless you are talking about about cars with drastically different aerodynamic drag, trap speed closely correlates with weight and rwhp. Of course, you can take a really extreme situation, like comparing a diesel to a Wankel or some crazy thing like that. But if you are comparing cars that are pretty similar, it's a simple equation. Within pretty broad limits, even traction and gearing aren't a huge factor.

Example: at the track the other day I made a second gear start. Once I realized it, I proabably should have aborted the run, but I didn't. Trap speed was off only 3mph (less than 3%) while the ET increased nearly two and a half seconds (25%). If one car goes 160mph with 720rwhp and another goes 130mph, it's 'cause the faster cars weighs less. It's just physics. As is well known, ET has a lot to do with traction and the 60' time (which are closely related) as well as hp.

BTW: it would take ~1,300rwhp to make my 4,100lb go 160mph. That's whay it ain't gonna happen. Take 1,000lbs off and and it would require less than 1,000hp.

Rich Krause

Highlander

A twin screw supercharger has a bit more area under the curve than a centrifugal, although the 1.5L difference in engine displacement might make up for it...

2MCHPSI

Eric K's car hit 590 RWHp on pump gas, but it was 93 octane. He also used the Motec system. Emmisions legal IM240. The Motec was the key to his success I think. It did cost a lot though BTW his compresion was around 8.3.1 and was running an S-trim /Aftercooler with 12 PSI of boost on a 383.

Julio

Another thing is there is a huge difference between making 600 RWHP with the hood open and a fan blowing cool air into the engine compartment on the dyno vs a car thats heat soaked from idling for an extended period. AC on, etc...

Remember dyno pull lasts seconds.. the track is an eternity in comparison..

Still the only true unadultered way is vehicle weight vs trap speed. Not racing on a roller


Hats off to those who can and their shizit stay together...beating after beating..not once or twice..mean hundreds of times.

TonyJ

Mine should do 600 or better with the cog setup. The numbers in the sig are on a Mustang dyno last night with a conservative tune on 91 octane. The belt was slipping or the horsepower would have been pretty close to the torque. Mine has a huge honking intercooler with 3" plumbing everywhere and is breathing very well.