FINALLY got my car put together and running & now to button it all down ... questions

[Tim_in_NC]

Recap ...

It's a '68 Camaro with a solid roller 383 with the following: 750 carb prepped by Scott @ SD Concepts, D1SC procharger pullied for approx 15 lbs. of boost, intercooled, meth kit if needed, sumped fuel cell with SX Fuel System from SD as well, built 200-4R, 9" rear, etc ...

So, after performing a complete restoration on this car for 4+ years, I was finally able to get it started this past weekend for the 1st time ...

Now I'm trying to get everything dialed in and ensuring no leaks all while trying to completely understand everything ...

Plan on running the dist. lock out with no advance as well as a mixture of 93 and 110 octane, mainly 93 ... will start at timing of 36 degress and adjust as needed ... also have a MSD-6BTM which will allow for some timing retard when dialed in ...

I'm currently seeing 6 PSI of fuel pressure at the gauge on the fuel rail at idle ... What's correct for this blown application, trying to determine if I need to adjust the regulator any ... then the regulator should adjust 1:1 (fuel psi to boost psi)

What do you blow-through guys normally have your rpm idle set at 1200 rpms or more like 800 rpms?

Also, noticed that whenever I bump the throttle slightly, that I'm getting a squeal from what sounds like the blower ... is this normal ... this is my first blown car ... you can actually hear it a little during the video below ...

At what RPMs do you guys normally start to see boost? Do you ever see boost in park? Also, at what rpms do you normally have to see before your blow off valve opens?

Any other recommendations or thoughts to help me ensure that I get everything buttoned down prior to street driving and head to the dyno for some further tuning ...

I'm sure I'll have more questions over the following weeks ... thanks guys ...

Here's a couple pics and even a short clip the wife took of the very first start up ...

http://www.youtube.com/watch?v=SGadXHtOKtI

https://static1.pt-content.com/images/pt/2009/07/engineviewstraight-1.jpg
https://static1.pt-content.com/images/pt/2009/07/enginedriverview-1.jpg
Thanks again for the help,
TIM

[camcojb]

Recap ...

It's a '68 Camaro with a solid roller 383 with the following: 750 carb prepped by Scott @ SD Concepts, D1SC procharger pullied for approx 15 lbs. of boost, intercooled, meth kit if needed, sumped fuel cell with SX Fuel System from SD as well, built 200-4R, 9" rear, etc ...

So, after performing a complete restoration on this car for 4+ years, I was finally able to get it started this past weekend for the 1st time ...

Now I'm trying to get everything dialed in and ensuring no leaks all while trying to completely understand everything ...

Plan on running the dist. lock out with no advance as well as a mixture of 93 and 110 octane, mainly 93 ... will start at timing of 36 degress and adjust as needed ... also have a MSD-6BTM which will allow for some timing retard when dialed in ...

I'm currently seeing 6 PSI of fuel pressure at the gauge on the fuel rail at idle ... What's correct for this blown application, trying to determine if I need to adjust the regulator any ... then the regulator should adjust 1:1 (fuel psi to boost psi)

What do you blow-through guys normally have your rpm idle set at 1200 rpms or more like 800 rpms?

Also, noticed that whenever I bump the throttle slightly, that I'm getting a squeal from what sounds like the blower ... is this normal ... this is my first blown car ... you can actually hear it a little during the video below ...

At what RPMs do you guys normally start to see boost? Do you ever see boost in park? Also, at what rpms do you normally have to see before your blow off valve opens?

Any other recommendations or thoughts to help me ensure that I get everything buttoned down prior to street driving and head to the dyno for some further tuning ...

I'm sure I'll have more questions over the following weeks ... thanks guys ...

Here's a couple pics and even a short clip the wife took of the very first start up ...

http://www.youtube.com/watch?v=SGadXHtOKtI



Thanks again for the help,
TIM
you set the fuel pressure to 6-7 psi at idle with the engine off and the electric pump running. If it's a mechanical pump set it to the same psi, obviously running, but without the blower inlet hooked up (blower belt off or inlet tube removed). You want 6-7 psi as a base without any blower influence on the regulator.

Never had a squeek at throttle opening, would think it's belt slip, either alt or ps. You won't see boost revving it in park. How the boost comes on is a factor of the blower and pulleys, camshaft, the entire combo actually and throttle position. Mine have always started making boost almost anywhere if you're in the throttle enough.

Jody

[Tim_in_NC]

Thanks Jody ... You're always great with helping out ... Wish you were in North Carolina some times ... :)

In your Yellow '69 that you use to have ... what rpms did you have it idleing at ...

[camcojb]

Thanks Jody ... You're always great with helping out ... Wish you were in North Carolina some times ... :)

In your Yellow '69 that you use to have ... what rpms did you have it idleing at ...
you're welcome Tim. The ZL1 clone idled at about 1000 rpms, but had a large solid roller in it (.720 lift, 266/278 @ .050).

Jody

[Tucks69]

Looking and sounding good!!

[Tim_in_NC]

Looking and sounding good!!

Thanks Michael ... I appreciate it ... man this project sure took me longer than I originally anticipated ... note to self ... never set a deadline again ... :)

[Tucks69]

Thanks Michael ... I appreciate it ... man this project sure took me longer than I originally anticipated ... note to self ... never set a deadline again ... :)

Yea my 69 Camaro has been apart for 3 years. Im mini tubbing it right now so maybe someday. I like the procharger set up. I plan on something like that for my 69.

If you ever come through Rockingham/Hamlet let me know. I would like to see the Camaro in person.

[Tim_in_NC]

Yea my 69 Camaro has been apart for 3 years. Im mini tubbing it right now so maybe someday. I like the procharger set up. I plan on something like that for my 69.

If you ever come through Rockingham/Hamlet let me know. I would like to see the Camaro in person.

Cool ... will do ...

[67 caprice]

looks so nice. I can't tell by the Pictures, but make sure the blow off vacuum line is connected to a intake manifold vacuum source by it's self.

[wicked68]

6-7 psi? is this because its carburated?

I run my at 45 psi with it set up to stay at 45 psi always no matter what my boost is at but its fuel injected.

your blower sounds normal - thats just a good whine of it compressing air.

[camcojb]

6-7 psi? is this because its carburated?

I run my at 45 psi with it set up to stay at 45 psi always no matter what my boost is at but its fuel injected.

your blower sounds normal - thats just a good whine of it compressing air.
yes, can't use the higher efi fuel pressures with the needle and seat in a carb. I've done the same with efi (no boost reference) but usually go higher in the fixed fuel pressure than 45 psi. You figure you have 45 psi of fuel pressure and then 15 psi of boost in the intake port fighting against that fuel pressure, so now the fuel injector sprays like it's at 30 psi (45 - 15 = 30). So I either bump the static fuel pressure, or run a boost reference line to increase the fuel pressure one psi per one psi of boost, keeping the injector spray pattern normal. Of course either of these changes would require some re-tuning on your part.

Jody

[DeltaT]

Looks and sounds great, Tim! What cam is in there? When you got it down to a low idle it sounded pretty mean...

Jim

[Procharmo]

Hi Tim In NC , you have a great looking build.
However you do need to remove the vacuum line from the blow off valve to the hat and connect it to a vacuum source under your throttle blades. This can be done via a small 1" spacer under the carb if you have the hood clearance. (Apologies if this is already done.)

You may also want to use remote oil catch can breathers as boost can get oil misting from the valve cover breathers all over your detailed engine bay.(slight blowby)

6 - 7 psi at idle is correct. It will go up when your in-boost.

Idle depends on motor, cam and is initially set up when you tune the idle circuit in the carb. ( Vacuum and those 2/4 little screws) etc. My old 355 F1C idled at 600 rpm.

Squeal might be from the blow of valve not operating and pressure is backing up (surge) or the belt. The blower should whistle and the valve whoosh.

You do not see boost in park, only when the motor is under load.
You will begin see boost from 2500 - 4000 rpm depending on motor displacement and blower size/step up ratio.


Enjoy! Then when it all feels normal! You'll be looking for more boost. Its addictive!!!

I hope this answer some of your questions . Have a great time at the dyno.

David