Author Topic: Top speed for the E30 318is? (Read 9565 times)

fabe · « **on:** September 14, 2009, 02:15:59 AM »

I know the M42 isn't built for top speed runs, but just curious if a close-to-stock M42 can go beyond the standard top speed
E30 318is : 127mph (~203.2kph)
E36 318is : 132mph (~211.2kph).

* figures obtained from Brendan Purcell's website: http://www.esatclear.ie/~bpurcell/318istechinfo.html

Tried a high speed run some time last week. My e30 with the E36M42 and Getrag 250 (3.15 rear diff), managed to top out at 215kph(as shown on GPS), speedometer indicated ~225kph. The car won't go any faster after holding that speed for more than 1 minute. Rev was about 6,200rpm

quinn11m20 · « **Reply #1 on:** September 14, 2009, 01:36:55 PM »

I have had mine up to 152. That was with a performance chip and K&N Filter. Plus a stock clutch. I used a Garmin GPS as a speed reference. I did it on a flat Highway out here in Florida.

318isfolife · « **Reply #2 on:** September 14, 2009, 02:12:59 PM »

k and n drop filter, dynomax hi-flow muffler (stock piping), turner chip. I have seen 135 and i still had a bit to go in 5th. the high ways over where im at arent really flat either. im sure on a flat road that is uber-long you could easily get this car to 145-7 ish.

fabe · « **Reply #3 on:** September 14, 2009, 10:06:43 PM »

Quote from: quinn11m20;78429

I have had mine up to 152. That was with a performance chip and K&N Filter. Plus a stock clutch. I used a Garmin GPS as a speed reference. I did it on a flat Highway out here in Florida.

What's your final drive ratio and what engine speed was it at 152mph?

roundel318 · « **Reply #4 on:** September 15, 2009, 04:31:25 PM »

BMW spedo's are famously optimistic.
I have seen fuel cutoff in 5th with a shown speed of ~140mph @ 6550rpm.
I doubt it was doing any better than 135mph, I would guess around 131, 132mph.
This was on a stock car that had nothing done to it.

fabe · « **Reply #5 on:** September 16, 2009, 12:17:51 AM »

Quote from: roundel318;78475

BMW spedo's are famously optimistic.
I have seen fuel cutoff in 5th with a shown speed of ~140mph @ 6550rpm.
I doubt it was doing any better than 135mph, I would guess around 131, 132mph.
This was on a stock car that had nothing done to it.

Which is why the mention of GPS-indicated speed...

The difference between the GPS and speedo is about 8kph... ~5mph..

roundel318 · « **Reply #6 on:** September 16, 2009, 03:25:31 PM »

Nice, I have problems reading

quinn11m20 · « **Reply #7 on:** September 16, 2009, 09:32:20 PM »

My tach was at 7000k. the speedo was way past the 140 mph mark, and I will add it was in the 70's (70 Deg F). I don't know if that helped any. I redlined every gear, when I got to 5th I just put my foot down as hard as I can get. And actually, I had recently replaced the speedo gears and took the car to get calibrated. I was 3 miles over. My Garmin was new and was put to the test with a buddies car. So plus or minus 3 miles an hour, She was about 152.

fabe · « **Reply #8 on:** September 16, 2009, 10:06:36 PM »

Quote from: quinn11m20;78553

My tach was at 7000k. the speedo was way past the 140 mph mark, and I will add it was in the 70's (70 Deg F). I don't know if that helped any. I redlined every gear, when I got to 5th I just put my foot down as hard as I can get. And actually, I had recently replaced the speedo gears and took the car to get calibrated. I was 3 miles over. My Garmin was new and was put to the test with a buddies car. So plus or minus 3 miles an hour, She was about 152.

I have guessed that the car would need 7,000rpm to go beyond 145mph.. Are you running stock 4.10 final drive ratio on the E30?

tjts1 · « **Reply #9 on:** September 16, 2009, 10:44:38 PM »

kenika65 · « **Reply #10 on:** September 17, 2009, 01:21:57 PM »

Been at 135 with 3.93LSD on the speedo...

quinn11m20 · « **Reply #11 on:** September 17, 2009, 03:31:11 PM »

Well the tach was more than 7k, and yes it was the stock diff.

Birdman16 · « **Reply #12 on:** September 18, 2009, 12:14:27 AM »

Around 140 the speedo said... I was drafting a 550i sport but I think the speedo was a bit off... Friggin scary but sweet!

quinn11m20 · « **Reply #13 on:** September 18, 2009, 04:39:08 PM »

You ain't lying about friggin scary. My car was floating all over the road.

xwill112x · « **Reply #14 on:** September 18, 2009, 04:46:08 PM »

ive touched on 140 before..