Stock 951 3rd/4th Gear Acceleration tests??
08-03-2005, 10:52 AM
#1
Rennlist Member
Thread Starter
Stock 951 3rd/4th Gear Acceleration tests??
Anyone have any acceleration times for a STOCK 951 (non S)?
I just put my 87T Club Race car back together and not sure it feels right, power-wise.
I ran some acceleration tests to compare to old numbers, but also wanted to see if anyone here has similar numbers.
Again, since this is a club race car, in the stock class, it has stock chips, stock power. The only modification is the cat is deleted, so if you have chips or anything else, I dont want to know your numbers, because it will throw off my comparison.
I ran 3rd gear 4000 - 6000 rpm, and 4th gear 60-80mph and 70-90mph. I had an old 944 series book that had acceleration data in various gears, and they used the mph runs. Normally I would just use the rpm, but to compare to the published data, I also ran the 4th gear mph runs.
If you could also let me know what the ambient temperture was when testing, that would be helpful.
Thanks for any input.
I just put my 87T Club Race car back together and not sure it feels right, power-wise.
I ran some acceleration tests to compare to old numbers, but also wanted to see if anyone here has similar numbers.
Again, since this is a club race car, in the stock class, it has stock chips, stock power. The only modification is the cat is deleted, so if you have chips or anything else, I dont want to know your numbers, because it will throw off my comparison.
I ran 3rd gear 4000 - 6000 rpm, and 4th gear 60-80mph and 70-90mph. I had an old 944 series book that had acceleration data in various gears, and they used the mph runs. Normally I would just use the rpm, but to compare to the published data, I also ran the 4th gear mph runs.
If you could also let me know what the ambient temperture was when testing, that would be helpful.
Thanks for any input.
08-03-2005, 11:33 AM
#4
Rennlist Member
Thread Starter
Wes, Im looking for the time (in seconds) that it takes the car to go 4-6k in 3rd.
Stephen, I gave the car some spool up time for each. I started full throttle around 3-3500 in 3rd, and 5-10mph below 60 and 70.
Im not worried about being incredibly consistent, Im just looking for ballpark numbers. The times I got last night were about a full second slower than I was expecting. The car is feeling pretty dead on the top end and the torque never really comes in hard - but the boost numbers are correct, so not sure what the problem is yet. Weather is pretty hot and humid, but should not account for that much of a difference.
Stephen, I gave the car some spool up time for each. I started full throttle around 3-3500 in 3rd, and 5-10mph below 60 and 70.
Im not worried about being incredibly consistent, Im just looking for ballpark numbers. The times I got last night were about a full second slower than I was expecting. The car is feeling pretty dead on the top end and the torque never really comes in hard - but the boost numbers are correct, so not sure what the problem is yet. Weather is pretty hot and humid, but should not account for that much of a difference.
08-03-2005, 03:25 PM
#5
Three Wheelin'
Wes, Im looking for the time (in seconds) that it takes the car to go 4-6k in 3rd.
08-03-2005, 03:45 PM
#6
Burning Brakes
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Not sure if it will help but my stock 86 with a 1/2 tank and at 2200 ft altitude and 70 F temp tookan avg of 8.6 secs to go from 40 mph to 80 mph in 3rd gear. This was starting from a steady state with no brake boosting so the turbo was not really spooled. Hand timed. The car did 0-60 mph using the first generation GTech meter averaging 6.15 secs with a best of 5.73 secs.
08-03-2005, 04:37 PM
#7
Rennlist Member
Thread Starter
Originally Posted by Waterguy
A stock 951, if already at full boost as you described, should take 5.9 to 6.0 seconds for 4000-6000 rpm in third.
I have some old acceleration figures for the same car with another engine in it, and the #s were anywhere from 5.7-6.4 secs. The tests I ran last night were 6.4-6.8 secs - slow!
