427/425 stocker engine - Page 3

Alan Roehrich · 04-14-2008, 07:36 AM

Quote:

Originally Posted by Jesse Knapp

Barry. Who makes the aluminum replacement heads? Is it Edelbrock? I really want to do an iron head engine. Heads are the key for me. Until I find good heads I won't buy the rest of the top end. Shortblock is not a problem. Thanks for the reply. Jesse

Jesse, the GM Performance Parts head is the "401" head, yes, they are cast by Edelbrock. The intake is actually the Edelbrock 7163 intake, GM Performance Parts sells it as the "359". The 427-425 doesn't SEEM to gain as much with the aluminum heads, but if you can't find a good set of iron heads to start with, they are a decent alternative, and you'll pay less for a set of "401" castings than you will for iron heads. The going price for iron castings is over $1800, when you can find an unmolested set. At least now you can put a full set of seats in a set if you find some with the seats shot. The problem is that 80% of them are "ported"

and have had big valves put in. If they've had the big valves put in correctly, seats won't fix them because the bowl is cut to match the bigger valve.

Adger Smith · 04-14-2008, 08:55 AM

Jesse,
If the 396/375 combo fits your car you might want to consider it. I believe most of the part numbers interchange. Last time I looked, the 396 will carry less weight per actual cu in & will make more Hp per cu in than the 427.( At a higher RPM) More than likely that is the combination Kevin had in his car @ the Sports Nationals. When he lived, or used east Texas as his base of operation, I did quite a bit of work for him. At that time he only had a 396/375 and a 427/430. Since he went to work for Pat I'm not sure if he has built any other engines. Give me a call at my shop 903 794 7223 or my cell 903 824 4924, If I'm busy I usually don't leave the work I'm doing to answer the shop phone, but I keep the cell with me at all times. I will hook you up with Kevin's numbers. I'm sure he wouldn't mind talking to you. I also have some parts you might be interested in. I had a customer that was going to build a jet boat engine with a virgin set of BB heads. The fuel prices & I talked him out of it. ( I couldn't ruin them ) I will try to get the casting #'s & post them & his number on this thread. I believe Kevin has a legal set of CP 396 pistons, that we couldn't use because of wrong bore size, For Sale at a very attractive price. I think I still have a good 4 bolt 396 or 402 block, I'll look today. Another way to do a 396 is a 454 with 8 sleeves. That will allow some creative machine work too. Good Luck, Adger

rickster · 04-14-2008, 09:43 AM

jesse,the camaro is doing good,getting ready to go back to the track in a month or so,

with an adjustable clutch set right,it's not even close to being as abusive on parts as a trans brake

Jesse Knapp · 04-14-2008, 09:59 AM

Adger. Thanks for the response. Where in Texas are you? I've seen your racecars at races before but never stopped by to introduce myself. If I am correct, don't you have a machine shop? Do you do machine work on stock pieces? I had planned to build for A/SA with the option to go to AA/SA. I realize I can move up to A/SA with the 396 piece, but not to AA/SA. Is this correct? The head castings for what I want to build are the same as for the 396/375 piece. They are 291, 840, 858, and 391. Let me know what numbers you find. If you'd like, email me. SSHA4899@AOL.COM Jesse

Jesse Knapp · 04-14-2008, 10:17 AM

Rick. That is true, but I won't be running a brake anymore by going to stock eliminator. Let me know how quick and fast you've gone with it. I think you've already surpassed what my smallblock ever did. Course yours is soooo big and mine was soooo small, with a rather large cam and lots of rpm. LOL. My belief, as to running the stick, is that those racers that stay with it are really good ones. Actually, I am more interested in these cars (stock eliminator) and their combinations rather than just driving. It's all about what you do with what you're allowed that interests me. Additionally, to be able to drive that stick down the track is more than I could handle. Yes, I am intimidated, I do admit. LOL. Another good candidate is John Duzac. D/S Good driver and one bad to the bone 302 (real tiny engine). Jesse

bsa633 · 04-14-2008, 11:47 AM

Quote:

Originally Posted by Adger Smith

Last time I looked, the 396 will carry less weight per actual cu in & will make more Hp per cu in than the 427

That will change...it have too!

rickster · 04-18-2008, 07:46 AM

jesse,the best i got out of it is a 1.43 60' 10.05 at 135.1

the reason for the poor 60' is the 4.30 gear out back was too conservative,i have some 4.86's that are going in,the 4.86's on the highway will be 3000 rpm's at 60 mph,which is ok,definately my limit though.

04-14-2008, 08:55 AM	#22
Adger Smith VIP Member Join Date: Dec 2001 Location: Texarkana Ark/TX Posts: 2,446 Likes: 575 Liked 880 Times in 311 Posts	Re: 427/425 stocker engine Jesse, If the 396/375 combo fits your car you might want to consider it. I believe most of the part numbers interchange. Last time I looked, the 396 will carry less weight per actual cu in & will make more Hp per cu in than the 427.( At a higher RPM) More than likely that is the combination Kevin had in his car @ the Sports Nationals. When he lived, or used east Texas as his base of operation, I did quite a bit of work for him. At that time he only had a 396/375 and a 427/430. Since he went to work for Pat I'm not sure if he has built any other engines. Give me a call at my shop 903 794 7223 or my cell 903 824 4924, If I'm busy I usually don't leave the work I'm doing to answer the shop phone, but I keep the cell with me at all times. I will hook you up with Kevin's numbers. I'm sure he wouldn't mind talking to you. I also have some parts you might be interested in. I had a customer that was going to build a jet boat engine with a virgin set of BB heads. The fuel prices & I talked him out of it. ( I couldn't ruin them ) I will try to get the casting #'s & post them & his number on this thread. I believe Kevin has a legal set of CP 396 pistons, that we couldn't use because of wrong bore size, For Sale at a very attractive price. I think I still have a good 4 bolt 396 or 402 block, I'll look today. Another way to do a 396 is a 454 with 8 sleeves. That will allow some creative machine work too. Good Luck, Adger __________________ Adger Smith (Former SS)

04-14-2008, 09:43 AM	#23
rickster Junior Member Join Date: Nov 2004 Location: torrington,ct Posts: 13 Likes: 0 Liked 0 Times in 0 Posts	Re: 427/425 stocker engine jesse,the camaro is doing good,getting ready to go back to the track in a month or so, with an adjustable clutch set right,it's not even close to being as abusive on parts as a trans brake

04-14-2008, 09:59 AM	#24
Jesse Knapp Member Join Date: Jan 2002 Posts: 109 Likes: 0 Liked 0 Times in 0 Posts	Re: 427/425 stocker engine Adger. Thanks for the response. Where in Texas are you? I've seen your racecars at races before but never stopped by to introduce myself. If I am correct, don't you have a machine shop? Do you do machine work on stock pieces? I had planned to build for A/SA with the option to go to AA/SA. I realize I can move up to A/SA with the 396 piece, but not to AA/SA. Is this correct? The head castings for what I want to build are the same as for the 396/375 piece. They are 291, 840, 858, and 391. Let me know what numbers you find. If you'd like, email me. SSHA4899@AOL.COM Jesse

04-14-2008, 10:17 AM	#25
Jesse Knapp Member Join Date: Jan 2002 Posts: 109 Likes: 0 Liked 0 Times in 0 Posts	Re: 427/425 stocker engine Rick. That is true, but I won't be running a brake anymore by going to stock eliminator. Let me know how quick and fast you've gone with it. I think you've already surpassed what my smallblock ever did. Course yours is soooo big and mine was soooo small, with a rather large cam and lots of rpm. LOL. My belief, as to running the stick, is that those racers that stay with it are really good ones. Actually, I am more interested in these cars (stock eliminator) and their combinations rather than just driving. It's all about what you do with what you're allowed that interests me. Additionally, to be able to drive that stick down the track is more than I could handle. Yes, I am intimidated, I do admit. LOL. Another good candidate is John Duzac. D/S Good driver and one bad to the bone 302 (real tiny engine). Jesse

04-18-2008, 07:46 AM	#27
rickster Junior Member Join Date: Nov 2004 Location: torrington,ct Posts: 13 Likes: 0 Liked 0 Times in 0 Posts	Re: 427/425 stocker engine jesse,the best i got out of it is a 1.43 60' 10.05 at 135.1 the reason for the poor 60' is the 4.30 gear out back was too conservative,i have some 4.86's that are going in,the 4.86's on the highway will be 3000 rpm's at 60 mph,which is ok,definately my limit though.