Re: 4.2 Injector pump for Big HP
Posted: Thu Dec 29, 2011 11:37 am
^^^ I don't think it's as bad as people are making out.
Aussie Hardcore Wheelers
https://outerlimits4x4.com.au/
superchargers are nowhere near as good as people think. The only reason they get any decent boost out of them for drag racing is because they are pouring methanol through them and the rules say they cant use turbos.nissannewby wrote:More so compund turbos or toy with the idea of supercharger and turbo setup to have boost at all rpm
How is the build going...?? Keen to see this keep going... cant believe how fast TD42's are going now... One has already won coopers outright this year so onwards and upwards i say....Northside 4x4 wrote:.
Apart from that, it was an interesting read today for most of the boy's at the shop (few laugh's to )
To show im not to backwards, or hiding behind a wall of text, we are interested in getting out there again to show a few other TD42's how to do it
Few part's ordered as a result:
Forged Steel Crank: Knife edged, lightened (roughly 40% lighter than std)
Custom Forged Steel rods (25% lighter, 60% increase in strength over standard)
Custom Pistons (Forged, 32% lighter, 15% stronger than std)
Will build a GTXX/GTXX compound setup for the job as even a VNT can match compounds for efficiency.
Hoping to get up around 65psi with block o-ring and better liners.
Pump built to deliver up to 6000rpm.
Have the full engine to build. Just need a car to put it in!
A little off topic, but has me stumped. Why are there rules against turbos in drag racing? (I presume we are talking top fuel/alcohol)MikeH wrote:superchargers are nowhere near as good as people think. The only reason they get any decent boost out of them for drag racing is because they are pouring methanol through them and the rules say they cant use turbos.nissannewby wrote:More so compund turbos or toy with the idea of supercharger and turbo setup to have boost at all rpm
Even if you could intercool it TD42 crank nose would not last long trying to transmit enough horsepower to run a blower making 20psi of boost.
Modern turbos don't have as much lag as before, and please don't trot out the boost from idle chestnut, that's what you have a gearbox for.
I dont believe there is any regulations on what type of forced induction they use in top level classes? It would take one big sucker of a turbo (or 4) to supply enough air to the engine to make the required HP.vanbox wrote:A little off topic, but has me stumped. Why are there rules against turbos in drag racing? (I presume we are talking top fuel/alcohol)MikeH wrote:superchargers are nowhere near as good as people think. The only reason they get any decent boost out of them for drag racing is because they are pouring methanol through them and the rules say they cant use turbos.nissannewby wrote:More so compund turbos or toy with the idea of supercharger and turbo setup to have boost at all rpm
Even if you could intercool it TD42 crank nose would not last long trying to transmit enough horsepower to run a blower making 20psi of boost.
Modern turbos don't have as much lag as before, and please don't trot out the boost from idle chestnut, that's what you have a gearbox for.
The NHRA website makes it sound as prescriptive as the Taxi Race: http://www.nhra.com/nhra101/classes.aspx" onclick="window.open(this.href);return false;Northside 4x4 wrote:I dont believe there is any regulations on what type of forced induction they use in top level classes? It would take one big sucker of a turbo (or 4) to supply enough air to the engine to make the required HP.
Those blowers supply around 3000cfm at 45psi.
They also dont run a transmission to allow the revs to come up to a point where the turbo's could work off the line.
NHRA wrote:Top Fuel
Among the fastest-accelerating machines in the world, 7,000-horsepower Top Fuel dragsters are often referred to as the "kings of the sport," and with good reason. They are capable of covering a quarter-mile in 4.4 seconds at more than 330 mph. Powered by a supercharged and fuel-injected 500-cubic-inch adaptation of the famed Chrysler Hemi engine, Top Fuel dragsters can burn up to 15 gallons of nitromethane fuel during a single quarter-mile run. Constructed of chromoly steel tubing and carbon-fiber composite, Top Fuel cars are 25 feet long and weigh 2,250 pounds in race-ready trim.
I was thinking the exact same thingKiwiBacon wrote:Their tyres are surprisingly good value.
Joshie_C wrote:How is the build going...?? Keen to see this keep going... cant believe how fast TD42's are going now... One has already won coopers outright this year so onwards and upwards i say....Northside 4x4 wrote:.
Apart from that, it was an interesting read today for most of the boy's at the shop (few laugh's to )
To show im not to backwards, or hiding behind a wall of text, we are interested in getting out there again to show a few other TD42's how to do it
Few part's ordered as a result:
Forged Steel Crank: Knife edged, lightened (roughly 40% lighter than std)
Custom Forged Steel rods (25% lighter, 60% increase in strength over standard)
Custom Pistons (Forged, 32% lighter, 15% stronger than std)
Will build a GTXX/GTXX compound setup for the job as even a VNT can match compounds for efficiency.
Hoping to get up around 65psi with block o-ring and better liners.
Pump built to deliver up to 6000rpm.
Have the full engine to build. Just need a car to put it in!
Howz it going x 3
How is the build going...?? Keen to see this keep going... cant believe how fast TD42's are going now... One has already won coopers outright this year so onwards and upwards i say....
Well hows it going?!
Even a photo of the parts that were ordered would be good to wet the whistleJJBigWheels wrote:Howz it going x 3
How is the build going...?? Keen to see this keep going... cant believe how fast TD42's are going now... One has already won coopers outright this year so onwards and upwards i say....
Well hows it going?!
MikeH wrote:How much for a crank?
I asked a bloke that and I may as well have been slapped, I just about fell off my chair. They aren't cheap.blackmav wrote:I got a slap in the face last time I asked a girl that..MikeH wrote:How much for a crank?
Probably just more piss in the wind fellas.JJBigWheels wrote:Howz it going x 3
How is the build going...?? Keen to see this keep going... cant believe how fast TD42's are going now... One has already won coopers outright this year so onwards and upwards i say....
Well hows it going?!
Ive got what ya need Marty and yes they have been ordered.marty wrote:Even a photo of the parts that were ordered would be good to wet the whistleJJBigWheels wrote:Howz it going x 3
How is the build going...?? Keen to see this keep going... cant believe how fast TD42's are going now... One has already won coopers outright this year so onwards and upwards i say....
Well hows it going?!
Ha Ha yes seen those before Matt.UGOTNUFN wrote:Ive got what ya need Marty and yes they have been ordered.marty wrote:Even a photo of the parts that were ordered would be good to wet the whistleJJBigWheels wrote:Howz it going x 3
How is the build going...?? Keen to see this keep going... cant believe how fast TD42's are going now... One has already won coopers outright this year so onwards and upwards i say....
Well hows it going?!
MAtt
That crank picture is actually an N/A crank that has been knife edged to illustrate the outcome , I will dig up a pic of the 4340 crank! Swaffie may have one handyMikeH wrote:On further thought that would not work so well.
You need better material for the crank if you stroke it,the stresses on it are tremendous once you start spinning it with big heavy pistons, throw lots of boost and fuel at it then take it all out at one end with big sticky tyres.
Aren't the Brian Crower 4.8 cranks 4340?MikeH wrote:On further thought that would not work so well.
You need better material for the crank if you stroke it,the stresses on it are tremendous once you start spinning it with big heavy pistons, throw lots of boost and fuel at it then take it all out at one end with big sticky tyres.