PY Online Forums - Bringing the Pontiac Hobby Together

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PY Online Forums - Bringing the Pontiac Hobby Together (https://forums.maxperformanceinc.com/forums/index.php)

- Pontiac - Boost (https://forums.maxperformanceinc.com/forums/forumdisplay.php?f=495)

- - New best (https://forums.maxperformanceinc.com/forums/showthread.php?t=854796)

Curtis Slowe

11-22-2021 01:08 PM

New best

2 Attachment(s)

Went to a track rental. As usual I couldn't get the stuff that I wanted to do done like leaning it out (was 10.4afr), lashing valves, plugs, and reset timing. Anyway, this was leaving off 4.5-5psi with 5° of timing pulled and ramping to 14psi. I made a mistake and had my timing 4° down from where I wanted it. I think it would have ran a 5.6x or better leaner with a couple degrees more timing. Idk. Not hateful for a little over 3,800lbs.

https://youtu.be/jEZde6Ni4mc

https://youtu.be/L9thWMSdl58

ErikW

11-22-2021 01:30 PM

What's the setup?

Curtis Slowe

11-22-2021 01:53 PM

1 Attachment(s)

469", single TV8513 88mm, sft cam, self ported E heads, 9.3:1, CSU carb, th400, and 3.25 gears. I added a video.

73 TRANSAM

11-22-2021 03:10 PM

Looking good Ronnie!!!

70 bird

11-22-2021 07:57 PM

Good work pays off! Nice job.

ErikW

11-22-2021 08:07 PM

Sweet

R 70 Judge

11-23-2021 01:58 AM

Nice pass. What fuel are you running?

Scott Stoneburg

11-23-2021 05:18 AM

Wow, that's awesome . Nice job on the combo.

Curtis Slowe

11-23-2021 07:38 AM

Quote:

Originally Posted by R 70 Judge (Post 6297013)

Nice pass. What fuel are you running?

It's on 93 pump gas with 1,000ml of water/methanol.
Thanks!

Curtis Slowe

11-23-2021 07:41 AM

Quote:

Originally Posted by Scott Stoneburg (Post 6297016)

Wow, that's awesome . Nice job on the combo.

Thanks! I spent some time with the suspension and cage this year. Got tired of spinning. It's starting to come around.

RUDOLFSSON

11-24-2021 04:24 AM

Good job !

Curtis Slowe

11-28-2021 10:03 AM

Quote:

Originally Posted by RUDOLFSSON (Post 6297215)

Good job !

Thanks! I don't think I've seen you post in a while. Is everything still good with you and your car?

RUDOLFSSON

11-29-2021 05:17 AM

Yes.. not much of a poster these days.

Life is busy with three kids and big house renovations... car is still alive sort of but not in running condition as is

-Kris.

er455

12-17-2021 08:26 PM

Nice pass

Hi Curtis did it run 9.80 in the quarter ? Did you let off because it said 98 mph . Slowe;6296845]Went to a track rental. As usual I couldn't get the stuff that I wanted to do done like leaning it out (was 10.4afr), lashing valves, plugs, and reset timing. Anyway, this was leaving off 4.5-5psi with 5° of timing pulled and ramping to 14psi. I made a mistake and had my timing 4° down from where I wanted it. I think it would have ran a 5.6x or better leaner with a couple degrees more timing. Idk. Not hateful for a little over 3,800lbs.

https://youtu.be/jEZde6Ni4mc

https://youtu.be/L9thWMSdl58[/QUOTE]

Curtis Slowe

12-17-2021 08:56 PM

[QUOTE=er455;6303354]Hi Curtis did it run 9.80 in the quarter ? Did you let off because it said 98mph.

Yeah, let out at the 1/8. Would've gone 8.9x-9.0x in the 1/4.

er455

12-18-2021 06:58 PM

Nice run

1 Attachment(s)

[QUOTE=Curtis Slowe;6303364]

Quote:

Originally Posted by er455 (Post 6303354)

Hi Curtis did it run 9.80 in the quarter ? Did you let off because it said 98mph.

Yeah, let out at the 1/8. Would've gone 8.9x-9.0x in the 1/4.

Awesome , I have the a very simular setup but I am on E85 , what are you running for timing and are running race fuel ? Are you running a factory block ? I am just wanting to run mid 9 ,s in the quarter with a a full weight 79 trans am with A/c and overdrive (4l80e )

Curtis Slowe

12-18-2021 07:25 PM

[QUOTE=er455;6303629]

Quote:

Originally Posted by Curtis Slowe (Post 6303364)

I'm on pump gas. 93 octane and 1,000ml of water/methanol. It's a '71 455" 2 bolt block. Raceweight is about 3,830lbs. I made a mistake with the timing. I thought I had 38° in it for base timing but only had 34°. So I was pulling 11° for 27° but was actually at 23° because of the mistake. I checked timing before running and added 2° for my first pass for a 25° under boost. Got caught up in tuning the 60' and never did add more timing. Was planning on 28-29° at 14psi. Was also pulling 5° on the leave. Hope all that isn't confusing. Lol

er455

12-18-2021 08:53 PM

New best

Thanks very nice set up glad to hear it a factory block too that what I have , no not confusing i have my timing locked at 28 at 14 # of boost

David Holmberg

12-19-2021 07:13 PM

Great run! I've not run at Clay City in years, always fun there.

er455

02-27-2022 08:57 PM

Timing retard

[QUOTE=Curtis Slowe;6303640]

Quote:

Originally Posted by er455 (Post 6303629)

Hey Curtis how are you pulling timing? thru a msd box ? I have a MSD 6 plus box and I will pull up to 10 degrees of timing but would you trust it to not fail ? Thanks
I'm on pump gas. 93 octane and 1,000ml of water/methanol. It's a '71 455" 2 bolt block. Raceweight is about 3,830lbs. I made a mistake with the timing. I thought I had 38° in it for base timing but only had 34°. So I was pulling 11° for 27° but was actually at 23° because of the mistake. I checked timing before running and added 2° for my first pass for a 25° under boost. Got caught up in tuning the 60' and never did add more timing. Was planning on 28-29° at 14psi. Was also pulling 5° on the leave. Hope all that isn't confusing. Lol

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