Tim@TBDevelopments
Lifer
anyone who claims they can do 1000bhp without constant stripdowns is talking out there arse.
the drag car was 955bhp and was a 2ltr 3sgte. but that only did 1/4mile drag runs but ran a 9000rpm redline. but using a GT4094r turbocharger at 2.7bar of boost pressure.
main issues you wouldn't put the power down as we kept snapping driveshafts, even the fancy chomemoly versions,we tried everything and kept going. another issue was even with 150shot nitrous the turbo wouldn't make full boost to 6500rpm. and at 5500rpm the car made 78bhp, then jumped to over 650 in 1000rpm.
Because of the extreme pressures and piston velocities it would eat bearings and rings. We used to about 8 runs a weekend and after 2-3 weekends it was ready for a strip down where it would show excessive ring gap expansion, and bearings had excessive wear.
the block actually didn't fail but we were running a very low 7.0:1 CR to achieve this, we did do testing around 9.0:1 and made similar power through the revband but 0.5bar less boost only issue was it kept ripping the head off. Even had special L19 ARP stud system made and still kept causing lift, and then there was a block cracking issue.
1000bhp i can do but expect about a 500-1000mile service life, and 1000mile is being generous. remember the 3/4 million pound WRC rally cars, running 2.4bar boost but only 300bhp. they have a 700mile service life and then need total strip down and overhaul.
this is talking from experience, don't expect to build it and never take it apart again. think of this like a gun. you build it. have a good weekend playing with it, then take it apart reoil it and then put it away for another weekend. but in the case of the car you need to replace wear items.
Tim
the drag car was 955bhp and was a 2ltr 3sgte. but that only did 1/4mile drag runs but ran a 9000rpm redline. but using a GT4094r turbocharger at 2.7bar of boost pressure.
main issues you wouldn't put the power down as we kept snapping driveshafts, even the fancy chomemoly versions,we tried everything and kept going. another issue was even with 150shot nitrous the turbo wouldn't make full boost to 6500rpm. and at 5500rpm the car made 78bhp, then jumped to over 650 in 1000rpm.
Because of the extreme pressures and piston velocities it would eat bearings and rings. We used to about 8 runs a weekend and after 2-3 weekends it was ready for a strip down where it would show excessive ring gap expansion, and bearings had excessive wear.
the block actually didn't fail but we were running a very low 7.0:1 CR to achieve this, we did do testing around 9.0:1 and made similar power through the revband but 0.5bar less boost only issue was it kept ripping the head off. Even had special L19 ARP stud system made and still kept causing lift, and then there was a block cracking issue.
1000bhp i can do but expect about a 500-1000mile service life, and 1000mile is being generous. remember the 3/4 million pound WRC rally cars, running 2.4bar boost but only 300bhp. they have a 700mile service life and then need total strip down and overhaul.
this is talking from experience, don't expect to build it and never take it apart again. think of this like a gun. you build it. have a good weekend playing with it, then take it apart reoil it and then put it away for another weekend. but in the case of the car you need to replace wear items.
Tim