New dyno runs with 30 LB injectors
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Joined: Jun 2000
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From: Glenbeulah, WI
Car: 1988 Firbird
Engine: 406
Transmission: T-56
Axle/Gears: 4.10
New dyno runs with 30 LB injectors
I took my car to the dyno today to tune in my new 30 lb injectors, the previous injectors were 24 lb injectors that were worn out. I have not dynod this car for at least three years and my last runs were 346 RWHP and 382 RWTQ. The new runs with the new injectors were 369 RWHP at 5650 RPM and 400 RWTQ at 3925 RPM. Overall I was very impressed with those numbers and now I am curious to see if my ET drops enough to get me into the 11's. Time will tell.
Thread Starter
Senior Member
Joined: Jun 2000
Posts: 599
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From: Glenbeulah, WI
Car: 1988 Firbird
Engine: 406
Transmission: T-56
Axle/Gears: 4.10
Re: New dyno runs with 30 LB injectors
Yes, I was tuning my own chip and these were the gains. My local dyno shop does not have anyone available that can tune OBD1 cars and they asked me (side job) to tune any OBD1 cars that come in. To get me familar with the dyno they let me use the dyno for free to tune my Firebird. The tune took me about 2-1/2 hours. In the past I never spent that much time on the dyno becuase dyno time was expensive so I got it close but there was probably more available. This tune appears to have nothing left on the table.
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From: Bright, IN
Car: '86 Bird, 96 ImpalaSS, 98 C1500XCab
Engine: LG4, LT1, L31
Transmission: 700R4, 4L60E, 4L60E
Axle/Gears: 3.73 Tors, 4.88 spool, 3.73 Eaton
Re: New dyno runs with 30 LB injectors
I have no doubt you'll see 11's.
Even with your previous tune, the mph indicates you're already there. Just need some more seat time/traction to see the lower ET.
What are you running for a clutch? Tires?
Even with your previous tune, the mph indicates you're already there. Just need some more seat time/traction to see the lower ET.
What are you running for a clutch? Tires?
Thread Starter
Senior Member
Joined: Jun 2000
Posts: 599
Likes: 0
From: Glenbeulah, WI
Car: 1988 Firbird
Engine: 406
Transmission: T-56
Axle/Gears: 4.10
Re: New dyno runs with 30 LB injectors
The car dead hooks with BFG 275 drag radials, and 6000 rpm launch. I have a LT1 flywheel which only weighs 14 lbs and the car will bog slightly on the launch. If I had a heavier flywheel I could launch harder but I am not going to change it.
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