6000rpm limit!

[aps]

  OwnaXR6T said:

Hi guys,

Just wondering apart from the obvious computer hacks. What would be needed to ensure the T's engine can safely rev higher. Ive had my rods and pistons done and am wondering  if that's all that's needed to ensure our engine can rev higher than the crappy pain in the ass 6000rpm limit. Id love just to have another 1000rpm to play with, even 500rpm would be nice.

Daniel

Hey Daniel I would be very careful how high you rev the T engine even with better than stock con rods..............it's a very long stroke engine..............and if you break any part in the engine it all turns to poo very quickly and gets very expensive.

If I was seriously going to turn the T engine faster than 5800 PRM I would definitely be having a good look at many other engine parts first.

The quickest way to find out how strong the base engine is.................just increase the engine RPM by 600.............it normally ends up in tears.

Peter

APS

[TURBO4LT]

  aps said:

Hey Daniel I would be very careful how high you rev the T engine even with better than stock con rods..............it's a very long stroke engine..............and if you break any part in the engine it all turns to poo very quickly and gets very expensive.

If I was seriously going to turn the T engine faster than 5800 PRM I would definitely be having a good look at many other engine parts first.

The quickest way to find out how strong the base engine is.................just increase the engine RPM by 600.............it normally ends up in tears.

Peter

APS

maybe we will just stick with the 5800

[Ezy10z]

I'm not 100% sure but I believe I read a post about the Nizpro T having a rev limit of 7500rpm ???

Edited 23/06/04 05:06 AM by Ezy10z

[Lumpen]

Didnt they run one with a MOTEC and some hard-core strengtheing? Maybe with Cam Timings and such its possible?

[aps]

  Ezy10z said:

I'm not 100% sure but I believe I read a post about the Nizpro T having  a rev limit of 7500rpm ??? 

Mate it's certainly possible................APS has Rev'd the T engine over 8000 RPM................... though I can assure you this engine which revs to 8000 rpm engine could not be afforded by many T owners (unless they morgage the house). :lol:

There's not much point to reving an engine higher (even 500 rpm higher) unless the engine is still producing power at that rpm point.

Peter

APS

[TURBO4LT]

Peter that T motor must sound nice at 8000rpm

[cuspub]

The Nizpro engine that ran at 7500rpm did of course use MoTeC, and the mods to that engine were machining, Cobra billet rods and valve springs. Absolutely nothing more.

Greg Brindley.

[YOOT]

My rev limiter is 6000, the tacho may be wrong though, but it sure is right there.

[sixfan]

  Turbo6man said:

Why? When you have 450Nm of torque at 2500rpm I don't see the need to rev the ring outa your motor. Just grab the next gear and the accelleration is right there for you ... and the motor will last longer. And 6000rpm out of a long stroke motor is not exactly "crappy". Can you tell me of another mass produced engine with the same stroke that will rev out to 6000?

Jaguar 4.2 will rev to 6000 and this XK is over 40 years old.

[Turbo6man]

  sixfan said:

  Turbo6man said:

Why? When you have 450Nm of torque at 2500rpm I don't see the need to rev the ring outa your motor. Just grab the next gear and the accelleration is right there for you ... and the motor will last longer. And 6000rpm out of a long stroke motor is not exactly "crappy". Can you tell me of another mass produced engine with the same stroke that will rev out to 6000?

Jaguar 4.2 will rev to 6000 and this XK is over 40 years old.

The last XK motor I rebuilt was a 3.8 - in an S type. I think it's redline was 5500rpm. Max power was at about 5000 and max torque at less than 3000. What a piece of art the XK motor is? It was first introduced in the XK120 in the early 50s in a 3.4 l capacity, went to 3.8 in the XK150, and ended up in the 60s as a 4.2 in the E type and XJ range.