Dnyo run today

woodie582 · December 8th, 2008, 11:27 AM

Got my car on the dyno for tuning today. First pull they had to shut down at around 3800 rpm due to ping, had 54 degrees advance. HP was at 237 and Torque at 326. Its a 71 350. Their plan is to eliminate vacuum advance and tune the dist. with weights only.

dan2286 · December 8th, 2008, 11:55 AM

Were those the numbers at 3800 rpm? If so, it looks like it will be pretty nice when it is running right.

woodie582 · December 8th, 2008, 11:59 AM

Those were what the numbers appeared to be, to me, in looking at the screen.

woodie582 · December 9th, 2008, 04:44 PM

Shut it down at 4800 rpm, running too lean. HP was 275 Tq was 330.

woodie582 · December 11th, 2008, 06:04 PM

Tuner says he's done. 11 degree initial timing 29 total (says any more and it pings bad, 91 octane with additive). Hp at 285 tq at 338. A/F ratio is good through out the rpm range.

projectheaven · December 11th, 2008, 09:00 PM

Is that a stock 350 or did you add some goodies to it?

woodie582 · December 11th, 2008, 10:18 PM

yea goodies, was thinking it should have broke 300. He wants to give it more timing but it's pinging.

J-(Chicago) · December 12th, 2008, 12:19 AM

did you have the valves cut?

woodie582 · December 12th, 2008, 09:25 AM

#7 heads with 2.07 / 1.6 . Rebuilt before I got it.

tonycpe · December 12th, 2008, 09:32 AM

Would like to learn more. Why is it pinging at only 29 degrees of advance?

woodie582 · December 12th, 2008, 09:43 AM

Pump gas, close to 10:1 cr, iron heads...dunno exactly. Guess I start my research why?

mp71conv · December 12th, 2008, 04:05 PM

What cam is in it? I have learned that with that cr and a cam that the intake closes too soon will give you a really high dynamic cr.

cutlassefi · December 12th, 2008, 05:30 PM

Are you sure your balancer is correct? If you're getting pinging at 29 degrees you have some thing wrong inside. The cast iron heads have a rough casting in the chambers. I hope you smoothed them out and took out all potential sharp edges. I have EFI but I run 36 degrees at WOT and 44 at cruise on 89 octane with 9.7 to 1! In Florida! No problem! I didn't have much cam either. Hope you sort it put. Keep us posted.

woodie582 · December 12th, 2008, 06:47 PM

I got the car today and the final results are 11.5 initial 31.5 total. 281 HP...338 Torque. Torque curve flat from 2500rpm to 5000.

Bunser · December 14th, 2008, 06:36 AM

Quote:

Originally Posted by woodie582

Tuner says he's done. 11 degree initial timing 29 total (says any more and it pings bad, 91 octane with additive). Hp at 285 tq at 338. A/F ratio is good through out the rpm range.

Would you mind telling what your A/F ratios were? The reason I ask is, I'm using the original point style ignition and the A/F readings were around 8 and 9ish. The fellow who rebuilt the engine claims that the HEI system would get it back up to a more reasonable range.Looking for advice.

cutlassefi · December 14th, 2008, 08:51 AM

Bunser- there's no ignition system in the world that will make that much of a difference. You'll have to rejet the carb, a bunch. At this point I'd have to question the level of knowledge of your engine builder.

woodie582 · December 14th, 2008, 11:39 AM

Bunser, I dont have the sheets with me but my A/F ratio was pretty close to optimum. 13-15 somewhere in there. I agree you need jetting. My guy had mine apart 4-5 times for primary jets and secondary rods.

Bunser · December 15th, 2008, 04:40 AM

Quote:

Originally Posted by woodie582

Bunser, I dont have the sheets with me but my A/F ratio was pretty close to optimum. 13-15 somewhere in there. I agree you need jetting. My guy had mine apart 4-5 times for primary jets and secondary rods.

I too have to think that a high energy system is not the proper solution.The engine has been completely rebuilt top to bottom and the carb was "overhauled" and refinished.
The engine is from a W31, 1970 vintage with the original carb.He did change out the original secondary rods and hanger.The primaries of course have no metering rods and I don't think the jets are replaceable.I'm open to any more suggestions as I know there are a lot of knowledgeable members on here.

MN71W30 · December 15th, 2008, 06:16 AM

I entered 281 hp into a 1/4 mile formula with a car weighing 3600 and got a time of 14.36. I had a 68 W30 years ago that ran a best of 13.93 on a near perfect run. I would say your motor will perform well and you'll be happy. Keep looking for issues but I got a feeling your close to max now. My 360 hp 400 calculated to be around 325hp.
Sounds like a great motor to me.

J-(Chicago) · December 15th, 2008, 06:20 AM

The jets are these slotted brass pieces, and are numbered.
They unscrew with a flathead screwdriver.

They used to sell little threaded boards at the store when I was a kid that you could screw your extra jets into.

Here's another.

Bunser · December 16th, 2008, 05:39 AM

Quote:

Originally Posted by 88 coupe

First is: Start your own thread, instead of adding unnecessary confusion to this one.

Norm

My apologies Norm, i didn't intend to hijack the thread.

88 coupe · December 16th, 2008, 07:22 AM

Quote:

Originally Posted by Bunser

My apologies Norm ........

The correct response would have been, a link to your new thread:

http://classicoldsmobile.com/forums/...-problems.html

Norm

65Delta88 · December 16th, 2008, 08:39 AM

What did the dyno pulls and tuning cost?

woodie582 · December 16th, 2008, 08:54 AM

The bill was $540.00

J-(Chicago) · January 30th, 2009, 01:23 PM

I forgot all about this thread. Glad you got it pretty well tuned.

I think that combo has more in it though.

68conv455 · January 30th, 2009, 07:22 PM

Ouch on the $540!

December 8th, 2008, 11:27 AM	#1 (permalink)
woodie582 Registered User Join Date: Jul 2008 Posts: 95	Dnyo run today Got my car on the dyno for tuning today. First pull they had to shut down at around 3800 rpm due to ping, had 54 degrees advance. HP was at 237 and Torque at 326. Its a 71 350. Their plan is to eliminate vacuum advance and tune the dist. with weights only.

December 11th, 2008, 09:00 PM	#6 (permalink)
projectheaven Registered User Join Date: Dec 2007 Location: San Francisco bay area Posts: 180	Is that a stock 350 or did you add some goodies to it? __________________ ____________________ 96 Impala ss 96 Buick Rivera(supercharged) 00 Yamaha R1

December 12th, 2008, 12:19 AM	#8 (permalink)
J-(Chicago) Seasoned beater pilot. Join Date: Jan 2007 Location: Chicago Posts: 2,696	did you have the valves cut? __________________ I'd rather have a numbers matching poker hand.

December 12th, 2008, 09:32 AM	#10 (permalink)
tonycpe Registered User Join Date: Jan 2008 Location: Cheboygan, Michigan Posts: 49	Would like to learn more. Why is it pinging at only 29 degrees of advance? __________________ Old Fogey Racing Ltd.

December 12th, 2008, 05:30 PM	#13 (permalink)
cutlassefi Registered User Join Date: Nov 2008 Location: Central Fl Posts: 163	Pinging @ 29 degrees Are you sure your balancer is correct? If you're getting pinging at 29 degrees you have some thing wrong inside. The cast iron heads have a rough casting in the chambers. I hope you smoothed them out and took out all potential sharp edges. I have EFI but I run 36 degrees at WOT and 44 at cruise on 89 octane with 9.7 to 1! In Florida! No problem! I didn't have much cam either. Hope you sort it put. Keep us posted.

December 8th, 2008, 11:55 AM	#2 (permalink)
dan2286 Registered User Join Date: Mar 2008 Location: North Ridgeville, Ohio Posts: 338	Were those the numbers at 3800 rpm? If so, it looks like it will be pretty nice when it is running right.

December 8th, 2008, 11:59 AM	#3 (permalink)
woodie582 Registered User Join Date: Jul 2008 Posts: 95	Those were what the numbers appeared to be, to me, in looking at the screen.

December 9th, 2008, 04:44 PM	#4 (permalink)
woodie582 Registered User Join Date: Jul 2008 Posts: 95	Shut it down at 4800 rpm, running too lean. HP was 275 Tq was 330.

December 11th, 2008, 06:04 PM	#5 (permalink)
woodie582 Registered User Join Date: Jul 2008 Posts: 95	Tuner says he's done. 11 degree initial timing 29 total (says any more and it pings bad, 91 octane with additive). Hp at 285 tq at 338. A/F ratio is good through out the rpm range.

December 11th, 2008, 10:18 PM	#7 (permalink)
woodie582 Registered User Join Date: Jul 2008 Posts: 95	yea goodies, was thinking it should have broke 300. He wants to give it more timing but it's pinging.

December 12th, 2008, 09:25 AM	#9 (permalink)
woodie582 Registered User Join Date: Jul 2008 Posts: 95	#7 heads with 2.07 / 1.6 . Rebuilt before I got it.

December 12th, 2008, 09:43 AM	#11 (permalink)
woodie582 Registered User Join Date: Jul 2008 Posts: 95	Pump gas, close to 10:1 cr, iron heads...dunno exactly. Guess I start my research why?

December 12th, 2008, 04:05 PM	#12 (permalink)
mp71conv Registered User Join Date: Mar 2007 Location: Pittsburgh PA Posts: 76	What cam is in it? I have learned that with that cr and a cam that the intake closes too soon will give you a really high dynamic cr.

December 12th, 2008, 06:47 PM	#14 (permalink)
woodie582 Registered User Join Date: Jul 2008 Posts: 95	I got the car today and the final results are 11.5 initial 31.5 total. 281 HP...338 Torque. Torque curve flat from 2500rpm to 5000.

December 14th, 2008, 08:51 AM	#16 (permalink)
cutlassefi Registered User Join Date: Nov 2008 Location: Central Fl Posts: 163	Dyno Run Bunser- there's no ignition system in the world that will make that much of a difference. You'll have to rejet the carb, a bunch. At this point I'd have to question the level of knowledge of your engine builder.

December 14th, 2008, 11:39 AM	#17 (permalink)
woodie582 Registered User Join Date: Jul 2008 Posts: 95	Bunser, I dont have the sheets with me but my A/F ratio was pretty close to optimum. 13-15 somewhere in there. I agree you need jetting. My guy had mine apart 4-5 times for primary jets and secondary rods.

December 15th, 2008, 06:16 AM	#19 (permalink)
MN71W30 Registered User Join Date: Dec 2008 Location: oakdale, Minnesota Posts: 530	281 hp numbers seem good I entered 281 hp into a 1/4 mile formula with a car weighing 3600 and got a time of 14.36. I had a 68 W30 years ago that ran a best of 13.93 on a near perfect run. I would say your motor will perform well and you'll be happy. Keep looking for issues but I got a feeling your close to max now. My 360 hp 400 calculated to be around 325hp. Sounds like a great motor to me.

December 16th, 2008, 08:39 AM	#23 (permalink)
65Delta88 Registered User Join Date: Oct 2003 Location: Illinois Posts: 87	What did the dyno pulls and tuning cost? __________________ 1965 Oldsmobile Delta 88 -425 High Comp Motor Perfromer Intake Holley Carb -Tucking 295's in the rear

December 16th, 2008, 08:54 AM	#24 (permalink)
woodie582 Registered User Join Date: Jul 2008 Posts: 95	The bill was $540.00

January 30th, 2009, 01:23 PM	#25 (permalink)
J-(Chicago) Seasoned beater pilot. Join Date: Jan 2007 Location: Chicago Posts: 2,696	I forgot all about this thread. Glad you got it pretty well tuned. I think that combo has more in it though. __________________ I'd rather have a numbers matching poker hand.

January 30th, 2009, 07:22 PM	#26 (permalink)
68conv455 Registered User Join Date: Oct 2007 Posts: 259	Ouch on the $540!

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