From what I have seen that is a pretty narrow range and could depend on the number of pulls and the oil. If it is break-in oil and pull 7 that would be a supprisingly good result.Dragginwagon406 wrote: ↑Tue Dec 07, 2021 4:42 am Nice running engine.
Looks to have a windage issue - you’re down 10 psi as the rpm climbs. I’m not familiar enough to say if it’s correctable on the long stroke small block, but it can’t be good.
What’s the bottom end and pan consist of? Any oil restrictors? Are the drains on these heads wide open?
Edit: a kick out style pan might help.
Do you plan on running a vacuum pump?
Dyno tuned 434 SBC 11:1 AFR 245 Solid Roller
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Re: Dyno tuned 434 SBC 11:1 AFR 245 Solid Roller
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Re: Dyno tuned 434 SBC 11:1 AFR 245 Solid Roller
Here's a pull with the 950...prairiehotrodder wrote: ↑Thu Aug 18, 2022 2:30 pm How much difference was there on the dyno with the different carbs ? You said the 850 did the best ?
Thankyou
Brian
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'73 Camaro Z/28 NETO/N
434 SBC 11:1, 1.294, 6.178 @ 108.87, 9.81 @ 134.93 (3060#, Naturally Aspirated, Sunoco Ultra 94)
Chopper Air Port 917-589-1278
434 SBC 11:1, 1.294, 6.178 @ 108.87, 9.81 @ 134.93 (3060#, Naturally Aspirated, Sunoco Ultra 94)
Chopper Air Port 917-589-1278
Re: Dyno tuned 434 SBC 11:1 AFR 245 Solid Roller
Awesome thread and results.
Paradigms often shift without the clutch -- https://www.youtube.com/watch?v=cxn-LxwsrnU
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Re: Dyno tuned 434 SBC 11:1 AFR 245 Solid Roller
Ran the car on Sunday at Atco Yesteryear Drags. It was losing traction after the hit, knocking the car out of the groove. 60' and ET were way off the mark. I need to get a camera on the suspension. The only change since running at Island was a carb swap with the XP850. Corrected mph is 133.343 on this run...
https://youtu.be/l6XQ3xkIDs4
https://youtu.be/l6XQ3xkIDs4
'73 Camaro Z/28 NETO/N
434 SBC 11:1, 1.294, 6.178 @ 108.87, 9.81 @ 134.93 (3060#, Naturally Aspirated, Sunoco Ultra 94)
Chopper Air Port 917-589-1278
434 SBC 11:1, 1.294, 6.178 @ 108.87, 9.81 @ 134.93 (3060#, Naturally Aspirated, Sunoco Ultra 94)
Chopper Air Port 917-589-1278
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Re: Dyno tuned 434 SBC 11:1 AFR 245 Solid Roller
Rat Pack 1 was two cars in front of me in the same lane. It obviously wasn't a track issue...
You do not have the required permissions to view the files attached to this post.
'73 Camaro Z/28 NETO/N
434 SBC 11:1, 1.294, 6.178 @ 108.87, 9.81 @ 134.93 (3060#, Naturally Aspirated, Sunoco Ultra 94)
Chopper Air Port 917-589-1278
434 SBC 11:1, 1.294, 6.178 @ 108.87, 9.81 @ 134.93 (3060#, Naturally Aspirated, Sunoco Ultra 94)
Chopper Air Port 917-589-1278
Re: Dyno tuned 434 SBC 11:1 AFR 245 Solid Roller
I hope he has a cupholder!ChopperScott wrote: ↑Mon Aug 22, 2022 10:02 pm Rat Pack 1 was two cars in front of me in the same lane. It obviously wasn't a track issue...
Rat Pack 1 at Atco (1).jpeg
Kevin
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Re: Dyno tuned 434 SBC 11:1 AFR 245 Solid Roller
To the OP,
Keep an eye on the drop base filters systems, once I chassis dynoed a mild 358 SBC with a drop-base 3" tall x 14" OD paper element air filter and it was 23 WHP LOSS compared to no filter. Eye opener.
BTW, have you noticed any ET or MPH change with the hood on?
Keep an eye on the drop base filters systems, once I chassis dynoed a mild 358 SBC with a drop-base 3" tall x 14" OD paper element air filter and it was 23 WHP LOSS compared to no filter. Eye opener.
BTW, have you noticed any ET or MPH change with the hood on?
'71 Z28 street strip car
Pump gas All motor SBC 427
3308 lbs-29x10.5 Hoosiers
NEW BEST ET
1.38 60' / 4.05 330' / 6.32@111.25mph
https://www.youtube.com/watch?v=99p13UK ... ture=share
Pump gas All motor SBC 427
3308 lbs-29x10.5 Hoosiers
NEW BEST ET
1.38 60' / 4.05 330' / 6.32@111.25mph
https://www.youtube.com/watch?v=99p13UK ... ture=share
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Re: Dyno tuned 434 SBC 11:1 AFR 245 Solid Roller
No argument here. My only other option is cutting a hole in the hood.BrazilianZ28Camaro wrote: ↑Tue Aug 23, 2022 12:03 am To the OP,
Keep an eye on the drop base filters systems, once I chassis dynoed a mild 358 SBC with a drop-base 3" tall x 14" OD paper element air filter and it was 23 WHP LOSS compared to no filter. Eye opener.
BTW, have you noticed any ET or MPH change with the hood on?
So far the quickest/fastest pass has been with the hood on.
'73 Camaro Z/28 NETO/N
434 SBC 11:1, 1.294, 6.178 @ 108.87, 9.81 @ 134.93 (3060#, Naturally Aspirated, Sunoco Ultra 94)
Chopper Air Port 917-589-1278
434 SBC 11:1, 1.294, 6.178 @ 108.87, 9.81 @ 134.93 (3060#, Naturally Aspirated, Sunoco Ultra 94)
Chopper Air Port 917-589-1278
Re: Dyno tuned 434 SBC 11:1 AFR 245 Solid Roller
I understand that there can be issues with the filter case lid getting to close to the choke horn and that this can cause problems.BrazilianZ28Camaro wrote: ↑Tue Aug 23, 2022 12:03 am Keep an eye on the drop base filters systems, once I chassis dynoed a mild 358 SBC with a drop-base 3" tall x 14" OD paper element air filter and it was 23 WHP LOSS compared to no filter.
Apparently, the shape of the base and lid has an effect as well.
Kevin
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Re: Dyno tuned 434 SBC 11:1 AFR 245 Solid Roller
Your torque works out at 1.412 lbs/ft per cube which is good for an 11/1 CR.
What length collectors are you running on your headeers. I would think you need something in the 12 inch range.
DV
What length collectors are you running on your headeers. I would think you need something in the 12 inch range.
DV
David Vizard Small Group Performance Seminars - held about every 2 months. My shop or yours. Contact for seminar deails - davidvizardseminar@gmail.com for details.
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Re: Dyno tuned 434 SBC 11:1 AFR 245 Solid Roller
Your torque works out at 1.412 lbs/ft per cube which is good for an 11/1 CR.
What length collectors are you running on your headeers. I would think you need something in the 12 inch range.
DV
What length collectors are you running on your headeers. I would think you need something in the 12 inch range.
DV
David Vizard Small Group Performance Seminars - held about every 2 months. My shop or yours. Contact for seminar deails - davidvizardseminar@gmail.com for details.
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Re: Dyno tuned 434 SBC 11:1 AFR 245 Solid Roller
Getting cold air from the outside would be nice, probably worth some ET.ChopperScott wrote: ↑Wed Aug 24, 2022 11:58 am
No argument here. My only other option is cutting a hole in the hood.
So far the quickest/fastest pass has been with the hood on.
I'd spect a big change in MPH with the hood on. Aero drag is a big factor at the big end.
Good luck, keep us posted!
'71 Z28 street strip car
Pump gas All motor SBC 427
3308 lbs-29x10.5 Hoosiers
NEW BEST ET
1.38 60' / 4.05 330' / 6.32@111.25mph
https://www.youtube.com/watch?v=99p13UK ... ture=share
Pump gas All motor SBC 427
3308 lbs-29x10.5 Hoosiers
NEW BEST ET
1.38 60' / 4.05 330' / 6.32@111.25mph
https://www.youtube.com/watch?v=99p13UK ... ture=share
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Re: Dyno tuned 434 SBC 11:1 AFR 245 Solid Roller
Hello there. Welcome back.David Vizard wrote: ↑Fri Aug 26, 2022 12:25 am Your torque works out at 1.412 lbs/ft per cube which is good for an 11/1 CR.
What length collectors are you running on your headers. I would think you need something in the 12 inch range.
DV
The headers have 1.875" x 29" primaries, 3.5" x 10" collectors, and 3.5" x 12" slip-on collector extensions w/turndowns.
'73 Camaro Z/28 NETO/N
434 SBC 11:1, 1.294, 6.178 @ 108.87, 9.81 @ 134.93 (3060#, Naturally Aspirated, Sunoco Ultra 94)
Chopper Air Port 917-589-1278
434 SBC 11:1, 1.294, 6.178 @ 108.87, 9.81 @ 134.93 (3060#, Naturally Aspirated, Sunoco Ultra 94)
Chopper Air Port 917-589-1278
Re: Dyno tuned 434 SBC 11:1 AFR 245 Solid Roller
Yer 3" is a low filter for a drop base, 4" may have fixed it.skinny z wrote: ↑Wed Aug 24, 2022 12:05 pmI understand that there can be issues with the filter case lid getting to close to the choke horn and that this can cause problems.BrazilianZ28Camaro wrote: ↑Tue Aug 23, 2022 12:03 am Keep an eye on the drop base filters systems, once I chassis dynoed a mild 358 SBC with a drop-base 3" tall x 14" OD paper element air filter and it was 23 WHP LOSS compared to no filter.
Apparently, the shape of the base and lid has an effect as well.
Ignorance leads to confidence more often than knowledge does.
Nah, I'm not leaving myself out of the ignorant brigade....at times.
Nah, I'm not leaving myself out of the ignorant brigade....at times.
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Re: Dyno tuned 434 SBC 11:1 AFR 245 Solid Roller
Probably would help, but wouldn't fit under the hood, unfortunatelly.
'71 Z28 street strip car
Pump gas All motor SBC 427
3308 lbs-29x10.5 Hoosiers
NEW BEST ET
1.38 60' / 4.05 330' / 6.32@111.25mph
https://www.youtube.com/watch?v=99p13UK ... ture=share
Pump gas All motor SBC 427
3308 lbs-29x10.5 Hoosiers
NEW BEST ET
1.38 60' / 4.05 330' / 6.32@111.25mph
https://www.youtube.com/watch?v=99p13UK ... ture=share