Jimmy

I just ordered my FM13 on a 112+2 and i'm still trying to get all the accessories i need for the cam install in may. I plan on shifting around 6500 +/- 100 rpms and setting the rev limiter around 6750 with this cam. I'm a little concerned about the stock rod bolts, should i be? Are most people with this rpm range using aftermarket rod bolts? Correct me if i'm wrong, but from what i've read, the 2000+ models have a stronger rod bolt than the pre 2000 models. And i've also read that the stock rod bolts can be safely rev'd to 6500rpms. I realize there might not be a clear cut answer to my question, but any suggestions would be helpful

Jimmy

C5 Purple Haze

If you spin to 6500 RPM you should be fine even with the early rod bolts. I have a 98 and I spin to 6500 RPM, so far so good.

Turo

iTrader: (23)

I shift mine at around 6600, rev limiter at 68, so far no problems.

GuitsBoy

iTrader: (4)

Why the +2 as opposed to the normal +4? The +4 advance would have brought the peak down an extra 200 RPMs if youre worried about spinning too high. Although it might be nice to spin up those 4.10s real high. If i recall it was the 01 and 02 fbodies that got the upgraded rod bolts.

For what its worth, I just bought an f13 +4. I plan on setting my shift light at 6500 hopefully timing my shifts to 6750 and setting a rev limit at 6850 or 6900. As it is, I very rarely see my 6000 shift light with my stock cam, so I dont think my motor will see revs that high on a daily basis.

Jimmy

I got the +2 instead of a +4 because i figured it would be a better setup with the 4.10s and the aluminum flywheel. I thought it would give me a little better dyno numbers and better track times without hurting the streetability.

I would like to shift closer to 6600rpms and set the rev limiter at 6800, but i was just trying to find out what other people are doing with this rpm range. Just trying to figure out if most people are upgrading to aftermarket rod bolts or sticking with the stockers. From what i've seen, most people w/ rod bolt failure are either using nitrous or spinning to 7000+.

Jimmy

GuitsBoy

iTrader: (4)

It does seem that rod bolt failure is really blown out of proportion. While it does indeed happen from time to time, raising the limiter is not the unavoidable death sentence for your short block that everyone says it is. I dont think that the scary stories out there reflect the actual number of cases accurately. If youre smart about it, I think youll be okay. If your shifts are smooth and precise, you should make it. If youre crashing into a 7K revlimiter every day, youre on borrowed time. Unfortunately spinning up this high is playing with fire. Take percaution and hopefully you wont get burned. Good luck or Bad luck may be enough to sway the outcome here, but thats all part of racing.

ssheets

iTrader: (1)

Futral said 6800 on stock bottom end is ok. I'm going F14

Brandon Boomhauer

iTrader: (10)

you're gonna love the f14, not even tuned, just a tad on the idle, and it puts along fine on the highway with 3.42s! Sound is great, havent got any WOT #s yet, as the clutch isnt in yet.

I think my limit will be ar 6800-6900 and shifting right before that. Now just to order a Harlan light, if he is still up to date on those...

luv2spd

iTrader: (1)

Well, if you think about it, the LS6 came from the factory with a 6500 rev limit right? They use the same rod bolts so I think if you're in that area it should be plenty safe b/c gm wouldn't put the redline on the LS6 that high if there was a reliability issue.

ssheets

iTrader: (1)

Very well put. As I said, (or implied) I'm setting my rev limit at 6800, but I don't plan on bumping into it everyday...once in awhile though

Nsty98LS1

iTrader: (11)

my opinion on replacing the rod bolts is that you're playing with fire if you're not resizing the rods. the rods in the engine are sized with the bolt that are in the engine. if you change that, by installing new rod bolts, the stresses on the rod, cap and the bearings is different leading me to think it's better to leave them alone. now this is just my opinion on the subject and i know some people have changed theirs with success and others with failure. not trying to flame anyone just something to maybe think about

Jimmy

Thanks for all the replies. I think i will just stick with the stock bolts. This is my daily driver so i doubt i will be taking it above 6500 very often. I'll probably take it up to 6800 or so when i get it dynoed to see how high it pulls.

Jimmy

AINT SKEERED

iTrader: (2)

I shift at 6700 and cross the traps around 6800-6900 . 6800 is on the 26.1 inch m/t drag radials. 6900 is on Nittos 25.66 inch tall. Stock bottom end.

Cal

iTrader: (1)

I probably hit the rev limiter at 6750 rpm 50 times last summer. I'm moving it to 7000 rpm this year with the new cam, but I'll have shift light set at 6600.