Ryan02SS

iTrader: (3)

Rev limiter 6800rpms Shift for max power at 6400rpms. No need to spin the lil TR224 any higher.

Big Geek

iTrader: (2)

There are two important factors that stand out here. One is the time the motor is going to spend at that RPM. Two is the quality of the oil and oiling system (Mileage). If you are not road racing and this question is geared more towards the ocassional romp on the street or Test-N-Tune night at the strip 7200+ should not be an issue with the better rod bolts as it is not going to see peak RPM at the drag strip or on the street for more than a few seconds unless one has geared the **** out of the car. You can be sure the engineers at GM tested them WELL beyond we would just to find the answer to your exact question. If they are willing to set the REV limiter on the Z06 at 6500 then you can be sure they are confident they will last well beyond 7000 RPM.

As for the oiling system, spending the money on a good blueprinted pump is cheap insurance when turning the motor to that kind of RPM and comparing it to starving the motor for oil should your pump be wearing out or contaminated with debri from past mileage. My car (on the motor.) sees 66-6800 RPM pretty regularly without issue and it is a 2000 model. There are always theories about issues such as these until someone goes and does it on a regular basis. You can be sure the gets who are running there stock bottom ends over 7-grand are not practicing witch doctors. Hope this helps.

Jim C.


Well this one would take a buttload of room to answer in detail but there are a few key factors here as well. Again one of the factors being the oiling system and quality of the oil. When turning that kinda RPM oil is always a bottom ends best friend. Two, if they are spinning rod bearings there is something else going on. A bearing is only going to put up with so much abuse before is checks out. That is why keeping proper oil to them is so critical. You would be suprised how many motors I have seen people destroy over something as simple as contaminated oil. Lets face it, as hot rodders we beat the **** out of our motors so changing the oil the same as one does their daily driver does NOT apply here. It is a monthly ritual for my cars, it may seem a little overboard but you would be suprised how quickly even the best synthetic oil will lose its vicosity when RPM and/or power adders are involved. I get folks bringing there cars over damaged and if it is bearing related it almost always involves cheap *** oil and or neglect in regards to changing it. I would rather spend the extra $$$ on a good oil than be tearing my motor apart due to a spun rod or main bearing.

The rev limiter issue is not really the key factor in spinning a bearing in one of these particular motors even though I would try not to make a habit of it. Hope this helps.

Jim C.

blkZ28spt

I'm not sure I buy that logic. 700+ rpm over what they set the limiter at is quite a bit.

HottLS1Z

iTrader: (5)

6800 RPMs here and I use RP 10-30 oil. They say change synthetic every 5 or 6K? I change mine every 3 or when it gets kinda dark what ever comes first. I also have a very early 2000 model like 12-99 or something like that. I've also been informed the hotter metal gets the softer it gets too so I run a 160 stat to keep things cooler too.
Another thing I heard some where before is that you ant at least 8psi of oil preasure for every thousand rpm, although I dont know how accurate that is considering my old LT1 saw 140K of abuse (and I mean abuse) and with the pennzoil 10-30 synthetic I ran the most it ever saw was like 42PSI.

Big Geek

iTrader: (2)

It is not as much as you would think. You might be surprised at how rigorous SAE testing actually is. Fruit for thought. Research it when you get a chance. Take care.

Jim C.

BriancWS6

iTrader: (18)

I had the limiter set to 6800 on my last car, it did fine, so I'm going with that on this one when I get the heads/cam installed. When you think about it, it's the same rodbolts that the ZO6 has and the limiter is set to 6500. So do you think that GM would have the limiter at the ragged edge? NO WAY. Another 300 rpms isn't gonna go from GMs "safe" to grenading the engine. I am talking about 01 and 02s with the upgraded rodbolts.

Z28/2002

iTrader: (27)

My limiter is set at 6700 and it shifts @ 6400. It's saw the limiter a bunch of times due the trans slipping before the the rebuild

03 BUSA

iTrader: (25)

I have a 98 with completely stock bottom end and have done 6800 numerous times with 20k on the car still runs strong.

zo6vetteman2003

iTrader: (1)

I saw my 5th gear shift light in the HUD about a week ago, I have raised rev. limiter to 7000rpm. I did get a message in the DIC at the same time that said, "System Inactive"

gametech

iTrader: (1)

As long as you swap the pushrods, I see no problem with 7krpm, even on a high mileage motor if properly maintained.

zo6vetteman2003

iTrader: (1)

I seldom hit the rev. limiter, but I have like anyone, not on purpose. I just get nervous at the dyno, car in fourth gear, headed for high rpm and think about everything I've done to this motor. Did anyone see the NSX on streetfire.net at the dyno? Blew the motor right there. There was an old guy sitting in a chair, reading the newspaper about five feet away. I figured the guy would jump or fall out of the chair, but was disappointed.


He acted like he was deaf or something. He was lucky he didn't get fragged.

05 GSXR 1XXX

iTrader: (16)

i went with the tsp cam/prc kit on the 233/239 and got it tuned to rev till 7,000. i only take mine to 6,660-6,700.

v-8

Ill just keep my car under 6200 and keep it alive...

BriancWS6

iTrader: (18)

***** Ha Ha!

Z28/2002

iTrader: (27)

bad6as

iTrader: (17)

im looking in to a 228r but with a lower lsa 110 or 111 with a lil advance ground + 1,2,3 in it.
think 6500 would be the ideal shift point with the rev set at 6600
right?

bigdsz

iTrader: (1)

I've heard a story for years that when GM was developing the LS1 that they ran a whole room full of engines at WOT [6,200 rpm's] for 500 hours without a single failure. The original design parameter was 50 hours but they continued for 500. If true, these engines can take a lot of abuse.

Steel Chicken

iTrader: (3)

my rev limiter is set to 7100 but I rarely take it over 6500.
ive swapped out springs, pushrods, seats, retainers, everything in the valvetrain but the lifters and the valves. most knowledgeable people ive talked too seem to think 7K is not too bad for a well maintained LS1. Good oil of course mandatory.

slow67

iTrader: (2)

My buddies h/c 99

ishot2pac69

I only shift at 5900 rpms and my cars been in the shop for like 4 months on and off(should have got a honda if you wanna rev)