1972 Procharged 581 Camaro

[californiacuda]

I have a project where I need new fabricated lower control arms for front c5 spindles. I thought I saw some in your pics, anybody I can call?

[White.Lightning]

Sick buildup. Nothing beats a BBC and a blower!

[speedjohnston]

Originally Posted by californiacuda

I have a project where I need new fabricated lower control arms for front c5 spindles. I thought I saw some in your pics, anybody I can call?

Those are an AFX spindles made to bolt on a camaro. The lower A-arms are SPC ones that I bought from Mark Savitske at SC&C. You can just click on his banner on the side of this page and see if he can help you.

[tones2SS]

Originally Posted by White.Lightning

Sick buildup. Nothing beats a BBC and a blower!

I agree with the sick build remark.
BBC & ProCharged = BIG POWER!!!

[speedjohnston]

Thanks guys.

[nvr2fst]

Originally Posted by speedjohnston

While it was still in the chassis shop I had them build me a set of 2 1/2" x 5" headers. The 5" collector is made flat to keep as much ground clearance as I can.



After I got it home I had them coated.



A couple shots of them in the car

Nice project. Smart move on the flattened collector for ground clearance plus I never cared for an exhaust system "exposed" when viewing from a short distance.
Question- Dia. and length of your headers (huge) Do you feel any velocity may be lost when its controlling the speed of the exhaust pulse. Now assuming the tube length is timing the pulse to match with the cams certain RPM range, is there any down play with the flattened collector to the pulses scavenging versus a full or more rounded collector. I dont think there is but for my own knowledge Im curious.

[WSSix]

sick! I am so jealous of the perimeter frame. I'm seriously considering that for my 79 eventually. I'm finding rust I want to take care of and a perimeter frame can do so much more to stiffen the chassis than sub frame connectors and a cage. I wouldn't even need a serious one to be effective. Keep posting pictures. This thing is going to be wild.

[speedjohnston]

Originally Posted by nvr2fst

Nice project. Smart move on the flattened collector for ground clearance plus I never cared for an exhaust system "exposed" when viewing from a short distance.
Question- Dia. and length of your headers (huge) Do you feel any velocity may be lost when its controlling the speed of the exhaust pulse. Now assuming the tube length is timing the pulse to match with the cams certain RPM range, is there any down play with the flattened collector to the pulses scavenging versus a full or more rounded collector. I dont think there is but for my own knowledge Im curious.

This answer is of course only my opinion, but I did do a lot of research before I had them built. First the diameter of the primaries is 2 1/2" and the collector is equivelant to a 5" round pipe. The primary tube length is about 32". The length is just a fairly safe normal tube length. Steve Morris being the guru of procharged big blocks is the one who told me to use this size. There is probably not a single person who knows more about them (again in my opinion). He used to have a business by his own name but now works with someone else at New Era Racecraft. Anyhow, he has never tried the flat collector but couldn't see how it would hurt in a supercharged car. I then talked to my engine builder that assembled it got the same answer. I talked to procharger, the guy who built the collectors (Dan Lemons of Lemons Headers) and the guy who built the headers all with the same answer. The flat collector will hurt power on an N/A car because the header scavenging effect won't be as strong so if its not supercharged I would not go this route. The blower motor doesn't care so much as its being forced through from the other end. Also, a blower motor just likes to get rid of the exhaust as fast as possible, and probably would work fine with no collector at all. There are of course other factors sometimes but in my case I had to do something anyway because they would be dragging on the ground with 2 round 5" pipes under the car on the street.

[nvr2fst]

Thanks for your reply. Like I said just curious on your selection. I haven't seen the flat collectors used alot outside of transverse mounted inline 4 bangers. I also should have asked as you mentioned if the procharger played a part in exiting. I guess in theory (2 sizes larger than primary) as you described in your sizing there probably is no hinder. However I did notice that they are a decent length, (collectors) will this help in pulling torque to midrange or does the procharger's benefits weigh that difference null. I guess if you had no attention brought up by the individuals you mentioned its not a big deal. I spent some time researching header design on a blown 34 ford I had with just frustrating results, mainly due to the fab guy I hired. Live and learn, and still learning!

Subscribed to your future results

[speedjohnston]

Originally Posted by nvr2fst

Thanks for your reply. Like I said just curious on your selection. I haven't seen the flat collectors used alot outside of transverse mounted inline 4 bangers. I also should have asked as you mentioned if the procharger played a part in exiting. I guess in theory (2 sizes larger than primary) as you described in your sizing there probably is no hinder. However I did notice that they are a decent length, (collectors) will this help in pulling torque to midrange or does the procharger's benefits weigh that difference null. I guess if you had no attention brought up by the individuals you mentioned its not a big deal. I spent some time researching header design on a blown 34 ford I had with just frustrating results, mainly due to the fab guy I hired. Live and learn, and still learning!

Subscribed to your future results

Its hard to find good info on a blower type street exhaust. Its allways an experiment and a compromise. All we can do is guess wisely when you want something different. It would be very interesting to try it on the dyno with different headers from zoomies to short tube round collector, flat collector, etc. The nice thing with the blower is if your down on power, just add more boost.