LS2 402 short block at SDPC!
Originally Posted by TwoFast4Lv
Big ***** we have install two of those motors in the last few month's and should be doing more dyno testing on them soon. the first owner was very suprised at the numbers his Pre boost SDPC 402 made with 'only' 9:1 
He was extremely worried about how it would run N/A till we got the Blower on it. To his suprise his new Blower motor made 25 more HP and 40 more FT of TQ then his hot cam 346 did
Next comes the blower
The other vehical is the Fastest H2 in the PNW. he is driving his waiting for the Turbo kit to go on
I am looking forward to continued business with SDPC!
He was extremely worried about how it would run N/A till we got the Blower on it. To his suprise his new Blower motor made 25 more HP and 40 more FT of TQ then his hot cam 346 did Next comes the blower
The other vehical is the Fastest H2 in the PNW. he is driving his waiting for the Turbo kit to go on I am looking forward to continued business with SDPC!
TwoFast4Lv I am thinking of building a pre-turbo low comp 402 and was wondering what kind of power you have seen from a 9:1 402 with a good turbo sized cam. I am wondering how close you can get to 500rwhp with that low of compression. Thanks for any input.
Staging Lane
Joined: Feb 2005
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Originally Posted by SSblack98
TwoFast4Lv I am thinking of building a pre-turbo low comp 402 and was wondering what kind of power you have seen from a 9:1 402 with a good turbo sized cam. I am wondering how close you can get to 500rwhp with that low of compression. Thanks for any input.
forgive me if it was asked, i only read the first 2 or 3 pages....lots of great info. will it sit on the Gen3 motor mounts? bellhousing the same for the t56? any little surprises one should expect?
im curious to see what a ported head, nitrous'd, f13'd... 402ci LS2 would do.
im curious to see what a ported head, nitrous'd, f13'd... 402ci LS2 would do.
Originally Posted by hpcubed
This is exactly what I have built. I am guessing it will be around 450rwhp. I am going to break it in this weekend and will let you know how it compares to my 430rwhp 346.
Big ***** G, just wondering if you knew what kind of PTV clearance you had on that dyno'd 402 with the 'big cam'? I just got my shortblock from you and am about to install the AFR 225's and wonder if I need to check it.Thanks
Teching In
Joined: Dec 2001
Posts: 40
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Brian, can you please call or email me ASAP to let me know when we can get the other two engines shipped.
Matt Jackson
G&D Performance
Melbourne, Australia.
mjackson@gdperformance.com.au
011 61 3 59961813
Matt Jackson
G&D Performance
Melbourne, Australia.
mjackson@gdperformance.com.au
011 61 3 59961813
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brian, i emailed you and wanted to know if i could get pistons with valve reliefs that are coated 11.5 , and also get a different bearing pack than the stock ones. thanks for your time, i am interested in purchasing asap
Teching In
Joined: Dec 2001
Posts: 40
Likes: 0
Originally Posted by phantom meneSS
Brian, can you please call or email me ASAP to let me know when we can get the other two engines shipped.
Matt Jackson
G&D Performance
Melbourne, Australia.
mjackson@gdperformance.com.au
011 61 3 59961813
Matt Jackson
G&D Performance
Melbourne, Australia.
mjackson@gdperformance.com.au
011 61 3 59961813
Teching In
Joined: Mar 2005
Posts: 25
Likes: 0
im running the 402 from scoggin dickey with afr 225cc heads and im right around 900rwhp on a mustang dyno.(spinning the tires making 851) and i am running more boost now!! I would recommend running a girdle on the bottom end. mine has been flawless so far.
p.s, big *****, i need the new hookup on my class1 race car. Maybe a NA 427 solid lifter warhawk motor
..thats what kj was suposed to quote out for me right before he left.
p.s, big *****, i need the new hookup on my class1 race car. Maybe a NA 427 solid lifter warhawk motor
..thats what kj was suposed to quote out for me right before he left. 
Teching In
Joined: Aug 2004
Posts: 4
Likes: 0
402 with Magnasun I am doing my 402 on my own with parts purchased at SDPC. I just read the 26 or so pages of this thread and would like to see some of your opinions of what I have in the works.
1) 243 ZO6 heads ported with 2.04 intakes and stock ex. valves, 918 Comp springs and titanium retainers, flowed 314 @ .550 and fell off a little @ .600.
2) The cam is the Lingenfelter cam for the Magnasun on the 346 inch motor - don't have the specs here w/me. I think it is 220/224 @ .050 .570/.572 and 114 lobe sep. I was planning a 346 buildup in the beginning.
3) Shortblock will be about what SDPC sells - Eagle crank and rods, LS2 alum block, they special ordered the pistons for me - Diamond 4.010 with -32cc dish. Bearings, rings, timing chain set etc will be what is standard with their 402. I am having it honed and assembled instead of SDPC taking care of it.
After reading all of the posts I am beginning to doubt the cam being enough for the 402 cubic inches - probably the same for the blower but it is what I have and I do have a couple of different pulleys to speed it up some. The heads cc'd at 67 and with the -32 cc pistons and a chometic head gasket it was estimated to be 9.4 to 9.5 on compression. I have 1 3/4 headers and no mufflers w/good air intake system. This is going in a ZO6 Vette.
Like to hear what others have experienced and maybe I should change now?
Thanks - - - Rick
1) 243 ZO6 heads ported with 2.04 intakes and stock ex. valves, 918 Comp springs and titanium retainers, flowed 314 @ .550 and fell off a little @ .600.
2) The cam is the Lingenfelter cam for the Magnasun on the 346 inch motor - don't have the specs here w/me. I think it is 220/224 @ .050 .570/.572 and 114 lobe sep. I was planning a 346 buildup in the beginning.
3) Shortblock will be about what SDPC sells - Eagle crank and rods, LS2 alum block, they special ordered the pistons for me - Diamond 4.010 with -32cc dish. Bearings, rings, timing chain set etc will be what is standard with their 402. I am having it honed and assembled instead of SDPC taking care of it.
After reading all of the posts I am beginning to doubt the cam being enough for the 402 cubic inches - probably the same for the blower but it is what I have and I do have a couple of different pulleys to speed it up some. The heads cc'd at 67 and with the -32 cc pistons and a chometic head gasket it was estimated to be 9.4 to 9.5 on compression. I have 1 3/4 headers and no mufflers w/good air intake system. This is going in a ZO6 Vette.
Like to hear what others have experienced and maybe I should change now?
Thanks - - - Rick
Teching In
Joined: Aug 2004
Posts: 4
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Sdpc It sounds like a lot of you were loosing your cool with Scoggin-Dickey recently.
I have dealt with Brian back when he worked at SDPC before and the "performance shop" also before he returned to SDPC. I also dealt with Kris - both were helpful and always took care of what I needed done. I hope I am not causing them problems here but I also go through a named CJ and he took care of things also. His extension is 345 I think.
Brian may need you to go through him on this stuff but those guys are really covered up usually when I go in their store. I bet it will get better as Brian gets back into the flow of things there. Rick
I have dealt with Brian back when he worked at SDPC before and the "performance shop" also before he returned to SDPC. I also dealt with Kris - both were helpful and always took care of what I needed done. I hope I am not causing them problems here but I also go through a named CJ and he took care of things also. His extension is 345 I think.
Brian may need you to go through him on this stuff but those guys are really covered up usually when I go in their store. I bet it will get better as Brian gets back into the flow of things there. Rick
TECH Veteran
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From: Lynnwood, WA (North of Seattle)
Originally Posted by heck55
I am doing my 402 on my own with parts purchased at SDPC. I just read the 26 or so pages of this thread and would like to see some of your opinions of what I have in the works.
1) 243 ZO6 heads ported with 2.04 intakes and stock ex. valves, 918 Comp springs and titanium retainers, flowed 314 @ .550 and fell off a little @ .600.
2) The cam is the Lingenfelter cam for the Magnasun on the 346 inch motor - don't have the specs here w/me. I think it is 220/224 @ .050 .570/.572 and 114 lobe sep. I was planning a 346 buildup in the beginning.
3) Shortblock will be about what SDPC sells - Eagle crank and rods, LS2 alum block, they special ordered the pistons for me - Diamond 4.010 with -32cc dish. Bearings, rings, timing chain set etc will be what is standard with their 402. I am having it honed and assembled instead of SDPC taking care of it.
After reading all of the posts I am beginning to doubt the cam being enough for the 402 cubic inches - probably the same for the blower but it is what I have and I do have a couple of different pulleys to speed it up some. The heads cc'd at 67 and with the -32 cc pistons and a chometic head gasket it was estimated to be 9.4 to 9.5 on compression. I have 1 3/4 headers and no mufflers w/good air intake system. This is going in a ZO6 Vette.
Like to hear what others have experienced and maybe I should change now?
Thanks - - - Rick
1) 243 ZO6 heads ported with 2.04 intakes and stock ex. valves, 918 Comp springs and titanium retainers, flowed 314 @ .550 and fell off a little @ .600.
2) The cam is the Lingenfelter cam for the Magnasun on the 346 inch motor - don't have the specs here w/me. I think it is 220/224 @ .050 .570/.572 and 114 lobe sep. I was planning a 346 buildup in the beginning.
3) Shortblock will be about what SDPC sells - Eagle crank and rods, LS2 alum block, they special ordered the pistons for me - Diamond 4.010 with -32cc dish. Bearings, rings, timing chain set etc will be what is standard with their 402. I am having it honed and assembled instead of SDPC taking care of it.
After reading all of the posts I am beginning to doubt the cam being enough for the 402 cubic inches - probably the same for the blower but it is what I have and I do have a couple of different pulleys to speed it up some. The heads cc'd at 67 and with the -32 cc pistons and a chometic head gasket it was estimated to be 9.4 to 9.5 on compression. I have 1 3/4 headers and no mufflers w/good air intake system. This is going in a ZO6 Vette.
Like to hear what others have experienced and maybe I should change now?
Thanks - - - Rick
Teching In
Joined: Aug 2004
Posts: 4
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Magnasun 402 I am really thinking I need to move on to something bigger also. Maybe someone else has done an engine similar to this and might know about where to end up at on duration - I don't think need to get carried away on the lift since my heads work good at .550 and not much above that. I may have to look at special ordering something to work with the blower/402 for this instead of off the shelf.
Might have a brand new Lingenfelter cam for sale if anyone is looking. Also a new Lunati crank for standard stroke 346.
I may be stepping over the line mentioning sale items here - if so I will not do that anymore.
Thanks for the input. Rick
Might have a brand new Lingenfelter cam for sale if anyone is looking. Also a new Lunati crank for standard stroke 346.
I may be stepping over the line mentioning sale items here - if so I will not do that anymore.
Thanks for the input. Rick
Originally Posted by Rottluver
I don't claim to be an expert, but that 220/224 cam sounds WAY small for a 402 with a blower...........that is actually the cam I am looking at putting in my stock (bolt on) LS1.
Originally Posted by heck55
It sounds like a lot of you were losing your cool with Scoggin-Dickey recently. I have dealt with Brian back when he worked at SDPC before and the "performance shop" also before he returned to SDPC.
...
Brian may need you to go through him on this stuff...
...
Brian may need you to go through him on this stuff...
I would definitely say, ask for Brian!
My rear cover was missing (it was supposed to be included/installed/aligned), and he's taking care of getting me what I need for that. They even found a cheaper cover alignment tool recently, and are planning to let me borrow it...
I E-mailed Brain 2 weeks ago. He said he'd post up here in a couple days.
I E-mailed Brain 1 week ago. He said he'd post up here in a couple days.
I called SDPC 4 times today. 1 busy and 3 no answers.
I E-mailed Brain 1 week ago. He said he'd post up here in a couple days.
I called SDPC 4 times today. 1 busy and 3 no answers.
Last edited by Cool_Hand_Luke; Feb 20, 2006 at 04:57 PM.
TECH Apprentice
Joined: Jul 2004
Posts: 375
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From: Carolina
Originally Posted by Cool_Hand_Luke
I E-mailed Brain 2 weeks ago. He said he'd post up here in a couple days.
I E-mailed Brain 1 week ago. He said he'd post up here in a couple days.
I called SCPC 4 times today. 1 busy and 3 no answers.
I E-mailed Brain 1 week ago. He said he'd post up here in a couple days.
I called SCPC 4 times today. 1 busy and 3 no answers.