View Full Version : How high can i rev this engine??


joastarlet
06-20-2012, 03:17 AM
I have this katech engine that is for my race car, and i want to know how high i can rev it? and maybe what i can expect from running it on e85 with a good tune.

And if 6400 is the absolut max, then what mods do i need to rev it higher.
I am running a Mid valley 4 speed gearbox.

CR: Unchanged from stock. LS2 should be about 10.7:1
Injector size: Stock LS2
Cam: 227/235 @ .050, .361/.365 lobe lift, 113LSA, 1.7:1RAR
RPM limit: 6400
Power: 509@ 6600, TQ: 447 @ 5200 (actual, not estimated)

-Street camshaft, mild lope
-PSI springs
-Trend pushrods
-CNC-ported heads
-C5-R timing chain
-Katech oil pump
-Katech aluminum valve covers, powdercoated red with Katech logo inserts
-Katech coil relocation kit with black wires
-Katech billet belt tensioner

Specs:
58x/4x triggers
90mm edelbrock trottlebody
Corvette damper/water pump
Corvette oil pan

best regards
Joachim

redtan
06-20-2012, 08:39 AM
I would say 6600-6800. Any higher and you're going to need some rod bolts, which should get you to like 7000-7200.

But I wouldn't push it past 6800 with that cam.

Ellesone
06-21-2012, 12:52 PM
You dont need anymore rpm than your making power at anyway but if you exceed 6500 and blip it to say 6700 it isnt going to all of a sudden let go... it will be accumulative damage I would think that will break things

Dyno Junkie
06-22-2012, 05:44 AM
With a 228 228 113 cam I use to rev our old LS1 to 6,950rpm.
Our new LS3 only buzzes to 6,800 on gear changes with the limiter set t 6,900.