A few years ago we had $25 dyno day at a local shop. My stock 1275 70 Midget
measured 55 HP and 60 ft. lbs at 5500 rpm. No idea if it was right but a
friends Late RB MGB was about the same with his 1800 smog engine.
----- Original Message -----
From: Norm 2Bs
To: Spridgets Digest ; Vintage RacingDigest
Sent: Tuesday, October 13, 2009 3:16 PM
Subject: [Spridgets] Chassis Dyno H.P.?
Took the Turner to a dyno shop. I'm underwhelmed at the results -- only 60
rear-wheel h.p., & 50 ft.lbs. torque. Interestingly, the HP curve, is flat
(but rising steadily) from 3200 rpms all the way to 6200 rpms. And, I mean
FLAT. It climbs from c. 25HP at 3200 straight up to 60 at 6300.
Torque curve is flat & level from 4000 to max.
Another interesting observation -- going from a 1-3/4" straight pipe to a
reducer to 1-1/2" & then through the original muffler increased the H.P. by
a little over 2 HP. This is on a 948 that is now c. 1,000 cc with APT
Vintage cam, flat-top pistons, 1-1/2" SUs, & Longman GT6 big-valve head.
Based on results, it will need a better crank to take advantage of the still
climbing power "curve."
Now comes the engine swap to the ex-HP Huffaker engine & back to the dyno
shop with that one.
Any of you Spridget guys had your cars on a dyno? What results?
'59 Turner #47
You are subscribed as firstname.lastname@example.org
Support Team.Net http://www.team.net/donate.html