What wins races revs vs Low down

[RB20LagWagon]

Ok people Sooooo very boring around here lately, im falling into coma.

Ok what wins races, On track on drag strip on street.

THe ability to rev or the abilty to produce power down low, so yer in a nut shell Rb25 vs rb20 with a passing glance to rb26dett and rb30det.

Flame on.

[R34]

Geez not this RB20 v's RB25 type discussion again.

Get over it.

Basically he with the most $$$$'s spent wins:)

Cheers

[RB20LagWagon]

Write cheque out to R34

[APA]

hehe chucks his flamesuit on

i agree about the one with the most money wins, but as you asked rb20lagwagon revs vs power low down i'll have to say the car with more power down low but the ability to keep that power going as ya get higher hehehe

Rb25's a nutshell? i think not

adrian

[N I B]

It depends on the race and the cars set up.

I hate my RB20, It revs to8300 has heaps of power but below

5000rpm Nannas Magna is faster so in day to day traffic its a dog

but a Wannerro its a lot of fun.

RB20s have a very short stroke and much less torque than 2.0L 4 cylinder motors like SR20s thats why i'm building an RB31DETT

stroker for my GTS-X. No RB20 is going to be a match on the track or strip for a motor like this, Nissan would have used RB20s in GTRs if they were the go.Don't get me Wrong 20s are still a good motor but there is always something better.

[R34]

Thanks for the cheque. Hope it's enough:)

I think maybe top end power for drags and low down for racing (on circuits without long straights)

Years ago when I mistakenly left Nissan for a Mazda Rallycar my sponsor built a periphial port 13B engine for me. I had the option of big ports like everyone else or small. I went for small and that engine kicked butt and whipped all the works cars up the Zig Zag in Kalamunda in a national rally (grandfather of Rally Australia). The car just leapt out of corners while others were waiting for the revs to rise.

Unfortunately the car was a pig to handle (ask Ken )

But the engine was magic

Cheers

[Butters]

Lag Wagon.

The answer to the question you didn't ask ...

Is cubes .....

End of the day, engines aside, more cubes will always win, when "everything is equal"

More low down, more top end, more everything.

The only reason we have these Rb20 v rb25 debates is that everything is not equal and we have to deal with how engines are built. Rather than having every engine well engineered.

The only draw back that cubes has when technology is equal, is the basic weight of the engine itself. This will affect size of car and weight placement. Probably most important in a track/circuit/rally cars where handling is as important than power. Drags , very little difference, extra power will overcome.

[MetBlue_GTST]

I wouldn't have said cubes, coz the Formula 1/Indy cars are only 3litres from memory, but they rev out to 16,000rpm or something crazy like that!!!

I would have said low down for street and rev's for racing, but it does depend on type of racing... If something with tight turns and lots of them, then low down would be better...

Just my thoughts on the matter...

[zanda]

If you look at the street-drags in japan, the fastest GTRs at each meet are not the ones with the biggest turbos, theyre the ones with the "smaller" turbos that belt off the line. It always makes me wonder why anyone would use a T88.

Im not sure what the jap tuning houses use for the 1000m runs, but Id be interested to find out.

[rob77]

Lets face it most of us are daily drivers, none of us (bar ken ) are rich enough to own daily driven cars and race cars So for most people it would low down response with small turbo's producing power from low revs. Sure if your building a drag car you'd go for the biggest turbo you could fit under the bonnet thats ultra laggy but produces huge HP, cos you'd never drive it day to day on the street cos it would be a dog and when it did spool it would be dangerous

[N I B]

Many foolish people use T88s and pay with poor 1/4 mile times in Street car come Drag cars, They only work in race only applications and Dyno shootouts.

[caminperth]

Steve - you forgot that the T88 also increases penis size by at least 3-5 inches..

[rob77]

I can hardly wait to get my turbo on and see what numbers I turn out and what rpm it makes full boost by, hopefully I wont be disappointed.

[N I B]

2 of the most powerful Jap cars in WA are slow over the 1/4 because of mismatched combos but setup for drag racing only

with the right gearboxs-diffs-suspension etc could run the numbers so pick your combo carefully.

[adam 32]

thanks for that rob...

personally i think the RB20 is a great little engine BUT put a decent size turbo on it and it dies in the ass. its horrible around the street and an automatic v6 commodore is quicker off the line. you do learnt to adapt your driving style to stay within the power band but its the main reason why i changed my turbo to a smaller unit.

i think its a matter of balancing both things out, low down power is good, but useless if u have no top end to keep on going. but as many have said around the street you can beat low rpm power