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  #1 (permalink)  
Old June 25th, 2008, 09:21 PM
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4.1 or LC2

I need to rebuilt my LC2 but came acros a 4.1 I have 6,500 to spend. I'm shooting for like 500 hp. What is cheaper to built?
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  #2 (permalink)  
Old June 25th, 2008, 11:20 PM
Got hotair?
 
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For a street car, 4.1 all the way. Better spool, more torque, and contrary to popular belief, they're not more expensive to build if you're planning on replacing the pistons anyway.

If you're looking for 9s, go with the 109.
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84 GN. 4.1L girdled with 8.5:1 JEs, 212-212 Comp Cam, GN1s, Ported stock intake, Ford FM IC, 6765DBB, KB headers, Cotton's 3" DP, Innovative Turbo Systems external gate, 60lb injectors, Turbo tweak chip, and a few misc things. No times with new combo yet.

06 Acura TL daily driver.
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  #3 (permalink)  
Old June 26th, 2008, 07:00 AM
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4.1 is a great engine. I have gone fast with one and tom-j has been 10.1 with one. I see 9's for him. But to answer your question, I built my 4.1 with a 109 block in the corner. Glad I did.
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1984 GN Frame off resto. Full wieght with spare tire and jack. All opitions are in working order.

87 Harness and ECM, "484" block 4.1 J&E Pistons, Full floating stock rods, stock crank, Girdle, CHAMPION GNr heads fully ported, T&D shaft mounted, Comp 218-212 roller, 70mm tb, sheet metal upper, 4 inch inlet pipe, Turbonectics 72mm BB q-trim 4 bolt turbo, P.S. intercooler, atr headers, 3.5 dp, custom dual 2.5 stainless exhaust with utralflows

BRF 200r4 built with alto reds, Billet servo, Transgo shift kit, Forward drum, CK's 3600 9 inch nlu, custom pan with rear sump.

GTA fronts with LS1 front brakes and Baer rears. Chrome moly custom upper and lowers with 3.42 gears and moser axles.
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  #4 (permalink)  
Old June 26th, 2008, 07:12 AM
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Same cost as an 3.8.
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Steve-

1987 GN, Astroroof, GNX dash, 109 3.8, .030 TRW forged, TE-62, CXR fmic, G Body DP, 212/212 cam, 60-65 Siemens inj, TT chip, LS1 MAF, port matched intake and heads, Razor's meth. inj. CK Trans, Pats Conv, Metco LCA's
Monitored by:PLX WB, EGT, SM & DS

11.8 @ 117 w/ 4.1 -(R.I.P. 7/25/08)


1987 Gray Regal T-- Low Options: Bucket seats w/ console, G80, AM/FM, Pwr windows & Ant., thats it!
LS1 MAF, 32lb inj, Chip, mostly stock
and staying that way....

2001 Jeep Cherokee 4.0 I6 4x4
K&N
Daily Driver

Out of F bodies..for good.
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Old June 26th, 2008, 10:33 PM
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Thanks guys really appreciate
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  #6 (permalink)  
Old July 10th, 2008, 05:47 PM
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Im also doing a 4.1, so let me know how yours come out, and i will do the same. Im going to build it myself, just to see if i can. Im getting block done, and balance everything.
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87 GN, BB66,3000 westcoast stall,hotwire,walbro,DW,210/215 roller,4340 crank,65lb injt,homemade alky,Scan2.1. ect.
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  #7 (permalink)  
Old July 10th, 2008, 06:05 PM
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4.1 here's my pic, not the average 4.1 block i like many built her to run 9's safely. i only have one pic.
Attached Images
 
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87 gn 83lb inj-atr's twin-in-tank fuel pump eric's 83lb alcohol chip-k&n- tranny 10 vain pump, art carr shift kit, art carr 9inch non-lock-up converter, tranny cooler, billet servo, razor's awesome alcohol kit, a 3 inch exhaust kit with waker ultra-flows, RJC's Megacooler ( it is HUGH!!) 70MM throttle body, hydrulic roller cam 218-212, precision's AWESOME!!
70MM Duel BB turbo, ( worth every penny guys) engine block machine'd and blue-printed, TH 3.5 dp. etc,etc,etc.
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  #8 (permalink)  
Old July 11th, 2008, 09:55 AM
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No-Nos What casting # is that block?
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Steve-

1987 GN, Astroroof, GNX dash, 109 3.8, .030 TRW forged, TE-62, CXR fmic, G Body DP, 212/212 cam, 60-65 Siemens inj, TT chip, LS1 MAF, port matched intake and heads, Razor's meth. inj. CK Trans, Pats Conv, Metco LCA's
Monitored by:PLX WB, EGT, SM & DS

11.8 @ 117 w/ 4.1 -(R.I.P. 7/25/08)


1987 Gray Regal T-- Low Options: Bucket seats w/ console, G80, AM/FM, Pwr windows & Ant., thats it!
LS1 MAF, 32lb inj, Chip, mostly stock
and staying that way....

2001 Jeep Cherokee 4.0 I6 4x4
K&N
Daily Driver

Out of F bodies..for good.
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  #9 (permalink)  
Old July 11th, 2008, 05:56 PM
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Looks like someone added some extra bolt holes. Look at the far side, you will see the welded on tabs.

Usually one will add the RJC head clamps to the outer side.

Billy T.
gnxtc2@aol.com
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  #10 (permalink)  
Old July 12th, 2008, 12:33 AM
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Quote:
Originally Posted by no-nos View Post
4.1 here's my pic, not the average 4.1 block i like many built her to run 9's safely. i only have one pic.
That don't look like a 4.1 block. There's too much meat between the cylinder bores. It may be because it was decked. It sure has the coolant holes though.
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  #11 (permalink)  
Old July 12th, 2008, 02:40 AM
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I don't think the production blocks (3.8 or 4.1) have bridged water passages on the end of the deck. Looks like a stage block to me.
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87' T-reX clone Runs like the loose bowels!!!12.37@111mph going easy on it
TE44 hebrew_charger- Big Mouth Toothless Cold Air - Micheal Jackson stretch IC "heee heee" - James Bond 009 injunctions- xp fool pump- Raid Armstong 93chocolate chip - highwire and voltronbooster - Boost Commakazi- Alky anonomous kit- 2500stall cat converter& ship in the bottle kit - 3" DamnPipe - Free Flowing 2 1/2 double breathers- internally stock motion with Heavy Duty Valv-o-line - PolyU bushoggs - Goldburg shocks - Billet LowerControl elbows - Vari Rate Colons & a AssMaster 2.1.
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  #12 (permalink)  
Old July 12th, 2008, 10:29 AM
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Real curious what block that is exactly? Thinking of going 4.1 myself. Just sold my spare engine & need a project. Either that or an NA block. I have to see what one can take?
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87 LTD owned since May 88 No hood ornament from the factory!
Old combo went 11.80 with 1.75 60 ft & broken crank gear teeth with 95* weather on a TA-49!
New combo is roller & 6776 Turbo. Track times coming!
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  #13 (permalink)  
Old July 15th, 2008, 08:52 PM
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Well my block checked out 0.30 over, and i ordered my pistons, rings, and HG. Anyone know the part number for the APR studs for the mains, and where to buy them?
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87 GN, BB66,3000 westcoast stall,hotwire,walbro,DW,210/215 roller,4340 crank,65lb injt,homemade alky,Scan2.1. ect.
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  #14 (permalink)  
Old July 15th, 2008, 10:39 PM
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Quote:
Originally Posted by 1chance View Post
Well my block checked out 0.30 over, and i ordered my pistons, rings, and HG. Anyone know the part number for the APR studs for the mains, and where to buy them?
I used a set I had for a 3.8 block.
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87' T-reX clone Runs like the loose bowels!!!12.37@111mph going easy on it
TE44 hebrew_charger- Big Mouth Toothless Cold Air - Micheal Jackson stretch IC "heee heee" - James Bond 009 injunctions- xp fool pump- Raid Armstong 93chocolate chip - highwire and voltronbooster - Boost Commakazi- Alky anonomous kit- 2500stall cat converter& ship in the bottle kit - 3" DamnPipe - Free Flowing 2 1/2 double breathers- internally stock motion with Heavy Duty Valv-o-line - PolyU bushoggs - Goldburg shocks - Billet LowerControl elbows - Vari Rate Colons & a AssMaster 2.1.
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  #15 (permalink)  
Old July 16th, 2008, 08:16 AM
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Looks like a 3.8 #0012 stage1 block. Let me know if you want to sell it if it is a #0012.
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  #16 (permalink)  
Old July 16th, 2008, 07:22 PM
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Quote:
Originally Posted by 49-blues View Post
Looks like a 3.8 #0012 stage1 block. Let me know if you want to sell it if it is a #0012.
There are no provisions for the extra bolt holes on the lower edge.



Billy T.
gnxtc2@aol.com
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  #17 (permalink)  
Old July 16th, 2008, 07:42 PM
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Quote:
Originally Posted by Nasty Wendy View Post
I used a set I had for a 3.8 block.
Whats the part# for the 3.8s, im sure there the same?
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87 GN, BB66,3000 westcoast stall,hotwire,walbro,DW,210/215 roller,4340 crank,65lb injt,homemade alky,Scan2.1. ect.
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