SBC manifolds, In & Ex

Adger Smith · 02-28-2013, 07:52 PM

Doing a local class of Dirt car that has to run a stock (no ram horn) ex manifold and a stock intake w a 2bbl carb.
Since I have "0" experience with these engines and I'm gathering parts I need to know what are the best Ex and what is the best intake. (no marine or vortec) Customer came wagg'in in a 057 non egr intake. Use it???
Yes, I did a search and didn't come up with anything concrete.
OK Guys give me your best. Do a PM or E-mail if you are not interested in posting your secret wepon. :~)
Thanks,
Adger
adgersperf@aol.com
903 824 4924 cell

Mark Yacavone · 02-28-2013, 08:35 PM

Adger, I don't think the numbers matter much if you get them from Brzezinski..

Might as well .The other guys will.

nickh · 02-28-2013, 09:27 PM

Adger years ago on my dirt tracking days we did the Brzezinski deal and it worked great.

We got pulled down several times and they never found what we were doing.

Tom Meyer · 02-28-2013, 09:29 PM

Most of the IMCA racers use LT1 manifolds on there hobby stocks. Tom

Adger Smith · 02-28-2013, 10:07 PM

Well, the rules spell out no Brzezinski. so my customer and I are not going there. We know the casting numbers don't matter, but someone out there knows what numbers are better than others. My customer is always looked at because he has always understood how to use the power he has and make the car handle. We have been doing this for a long time as engine builder/customer. We have won track championships without cheating, but we do bend rules. This 4412 carb Deal is something new for us & most of the other guys. The car will weigh around 3200 lbs. I've already put atogether a mule and had it on the dyno. It came in a little low (RPM) on power, but had a great power curve. It looks like I had a little too much intake duration and the ex flow was not too good. He has small log manifolds.(only legal ex manifold) I also had a trick valve angle on the ex that might not be working on overlap. When I do the "Good engine" we wanted to try other parts. These are just what we had in the used parts bin, except the cam. We have a 14" vac @ 1200 and a .447 lift rule Hyd cam. cast flat tops and 4 equal valve reliefs. Stock 1.5 ratio rockers. Stock pushrods (5/16) and any open chamber heads. No porting on heads or intake or ex. Not sure if the late mod alum manifolds are legal. it's not in print if they are. Well, as usual any help or constructive comments will be appreciated.
Thanks,
Adg

nickh · 03-01-2013, 06:19 AM

Man they are strict with the lift rule, we ran the Isky 305 hydraulic cam in our stocker with 1.5 rockers.

Adger we also found a high rise intake (GM part number) from 1973 I think it was (remember we were doing this back in the late 80's) huge pickup for us, and we had to run a quadrjet carb.

How large of air filter will be be running?

Pretty strict rules but sounds like fun though.

Mike Taylor 3601 · 03-01-2013, 09:44 AM

I will PM some info I learned on 2bbl. project
Mike Taylor 3601

02-28-2013, 07:52 PM	#1
Adger Smith VIP Member Join Date: Dec 2001 Location: Texarkana Ark/TX Posts: 2,446 Likes: 575 Liked 880 Times in 311 Posts	SBC manifolds, In & Ex Doing a local class of Dirt car that has to run a stock (no ram horn) ex manifold and a stock intake w a 2bbl carb. Since I have "0" experience with these engines and I'm gathering parts I need to know what are the best Ex and what is the best intake. (no marine or vortec) Customer came wagg'in in a 057 non egr intake. Use it??? Yes, I did a search and didn't come up with anything concrete. OK Guys give me your best. Do a PM or E-mail if you are not interested in posting your secret wepon. :~) Thanks, Adger adgersperf@aol.com 903 824 4924 cell __________________ Adger Smith (Former SS)

02-28-2013, 08:35 PM	#2
Mark Yacavone Veteran Member Join Date: Mar 2002 Location: Miles From Nowhere Posts: 7,817 Likes: 2,907 Liked 5,125 Times in 1,953 Posts	Re: SBC manifolds, In & Ex Adger, I don't think the numbers matter much if you get them from Brzezinski.. Might as well .The other guys will. __________________ "We are lucky we don't get as much Government as we pay for." Will Rogers

02-28-2013, 09:27 PM	#3
nickh Senior Member Join Date: Sep 2010 Location: Houston,Texas Posts: 820 Likes: 3,555 Liked 644 Times in 193 Posts	Re: SBC manifolds, In & Ex Adger years ago on my dirt tracking days we did the Brzezinski deal and it worked great. We got pulled down several times and they never found what we were doing.

02-28-2013, 09:29 PM	#4
Tom Meyer Senior Member Join Date: Aug 2003 Location: Pierce NE Posts: 936 Likes: 78 Liked 354 Times in 120 Posts	Re: SBC manifolds, In & Ex Most of the IMCA racers use LT1 manifolds on there hobby stocks. Tom __________________ Tom Meyer 5240 SS Stock ???

02-28-2013, 10:07 PM	#5
Adger Smith VIP Member Join Date: Dec 2001 Location: Texarkana Ark/TX Posts: 2,446 Likes: 575 Liked 880 Times in 311 Posts	Re: SBC manifolds, In & Ex Well, the rules spell out no Brzezinski. so my customer and I are not going there. We know the casting numbers don't matter, but someone out there knows what numbers are better than others. My customer is always looked at because he has always understood how to use the power he has and make the car handle. We have been doing this for a long time as engine builder/customer. We have won track championships without cheating, but we do bend rules. This 4412 carb Deal is something new for us & most of the other guys. The car will weigh around 3200 lbs. I've already put atogether a mule and had it on the dyno. It came in a little low (RPM) on power, but had a great power curve. It looks like I had a little too much intake duration and the ex flow was not too good. He has small log manifolds.(only legal ex manifold) I also had a trick valve angle on the ex that might not be working on overlap. When I do the "Good engine" we wanted to try other parts. These are just what we had in the used parts bin, except the cam. We have a 14" vac @ 1200 and a .447 lift rule Hyd cam. cast flat tops and 4 equal valve reliefs. Stock 1.5 ratio rockers. Stock pushrods (5/16) and any open chamber heads. No porting on heads or intake or ex. Not sure if the late mod alum manifolds are legal. it's not in print if they are. Well, as usual any help or constructive comments will be appreciated. Thanks, Adg __________________ Adger Smith (Former SS)

03-01-2013, 06:19 AM	#6
nickh Senior Member Join Date: Sep 2010 Location: Houston,Texas Posts: 820 Likes: 3,555 Liked 644 Times in 193 Posts	Re: SBC manifolds, In & Ex Man they are strict with the lift rule, we ran the Isky 305 hydraulic cam in our stocker with 1.5 rockers. Adger we also found a high rise intake (GM part number) from 1973 I think it was (remember we were doing this back in the late 80's) huge pickup for us, and we had to run a quadrjet carb. How large of air filter will be be running? Pretty strict rules but sounds like fun though.

03-01-2013, 09:44 AM	#7
Mike Taylor 3601 VIP Member Join Date: Oct 2008 Location: Somerset,Ky Posts: 1,372 Likes: 354 Liked 307 Times in 103 Posts	Re: SBC manifolds, In & Ex I will PM some info I learned on 2bbl. project Mike Taylor 3601