azboostin

wondering what a good safe rev limit is on a stock lt1 bottem end... I dont want to put to much strain on it, esp with nitrous

CRAZZ28

iTrader: (13)

Its hit and miss. some guys run 6800 all the time without trouble, some spin a bearing at 6300 the first time they hit it. On the stock cam you wont make much power over the stock limiter anyway. I would just leave it alone for now.

azboostin

the reason im asking is because I want to know the mph top out in drive with 3.73 and 4.10 at 6200+

projekt70chevelle

iTrader: (4)

Welllllll..... Had a problem with the ported MAF, *coughmistakecough*, effecting shift points on my A4 (somewhere in excess of 6,000 rpm at 145,xxx miles on the engine in the 2-3 shift.... racing a steeda mustang no-less) spun a bearing. Like stated its hit or miss. Really depends on how the engine was taken care of.... and unless you're the original owner, prepare for the WORSE.

I'm now in the process of rebuilding (which i have no idea which route i'm heading in), but its always good to have funds ready. Especially if you are racing your daily. Just think twice about how it will affect you.

Gabbiani

iTrader: (20)

I wouldn't go much above idle if you want to be safe...

Mine let go in the burnout box feathering in the area of 6800 - 2 rod bearings. Still ran a 12.8 @ 114 cam only with the 2 spun bearings. Died in the burnout box, again at the line, and then when I got on the brakes at the end of the run. It was toast.

Sprayed mine to upper 5k with no issues for quite a while before I cammed it.

StealthFormula

iTrader: (35)

181 mph with 3.73's at 6200rpm in 4th gear
164mph with 4.10's at 6200rpm in 4th gear

infinitebird

iTrader: (11)

^ generally you don't want to shift into OD at the track so I assume he wanted to know the top of 3rd.

1badzee

iTrader: (12)

My **** shifts past 6500 sometimes and the car is happy as hell.. i guess its a hit or miss

CRAZZ28

iTrader: (13)

He is still on the stock short block.

StealthFormula

iTrader: (35)

good catch


126.6mph with 3.73's
115mph with 4.10's

James Montigny

iTrader: (13)

6375 on the stock bottom end.
Higher under low traction.
25 or so track passes, plenty of street abuse.

Maybe I was lucky.
(having said that, I'll probably spin a bearing tomorrow on the way to work)

speed_demon24

iTrader: (6)

If it's an auto you have to take converter slippage into consideration.

azboostin

yah i wanted to know the 1:1 gear not OD hehe... does anyone know the stock rev limiter on a 1993? and also how to tell symptoms of a spun rod bearing... you guys got me all worried now that I read these motors cant rev haha..

Jon@BruteSpeed

iTrader: (3)

I have a 6400 chip in my MSD and just hit it at the stripes. Highest mph was 118.96 with 28 tall MT E/T street, 4.30 gear, and with a converter with about 5.8% slippage. I shift at 5600 and don't make any power past that, just have a quick first 1/8 mile and drink coffee the rest of the way.

CRAZZ28

iTrader: (13)

stock limiter is somewhere around 5800 give or take a little.

dont worry....you will know IF and WHEN you spin a rod bearing.

lilblackZ28

I have a ? not to hijack this thread but when you guys are at the track do you shift the car or just put it in drive and let it do its thing?Givin its an A4.

infinitebird

iTrader: (11)

manually shifting an auto is dumb.

Schweet97Z

iTrader: (35)

azboostin

its not dumb ifd its a full manual reverse vb

Schweet97Z

iTrader: (35)

putting a manual vb in is still stupid. the computer will shift faster and more accurate than what anyone else can.....netting you consistancy and faster times....