Lets build a 427 Dart block LT1
05-31-2009, 12:29 AM
#21
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I
spin the tires, put on stickys. - Hoosiers
break the rear, fix the rear - 9" Spooled
break the clutch fix the clutch - Clutch Packs
break the axle, fix the axle - Moser axles
break the driveshaft, fix the driveshaft - 1350 jointed aftermarket
break the trans, fix the trans - 4L80 + Vigilante
There is a lot of stuff that needs to be thought of.....
spin the tires, put on stickys. - Hoosiers
break the rear, fix the rear - 9" Spooled
break the clutch fix the clutch - Clutch Packs
break the axle, fix the axle - Moser axles
break the driveshaft, fix the driveshaft - 1350 jointed aftermarket
break the trans, fix the trans - 4L80 + Vigilante
There is a lot of stuff that needs to be thought of.....
-Dustin-
05-31-2009, 07:41 AM
#22
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send me a pm with your info, as soon as we have the finalized pricing I'll be letting everyone know. Right now we have a first come first serve list going and I'll get the info out as soon as I get it.
05-31-2009, 03:33 PM
#23
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CANT WAIT TILL NEXT TAX SEASON!!!!!!!!!!!! 
Im thinking 427ci, AFR 227 heads, with a docile cam (24X/25X .6XX/.6XX 108lsa) 6 speed, S60 w, 4.56's. Vic Jr intake, elbow 90mm tb, And have kooks make up a stepped header (1 7/8-2). That would be a great DD, with some power to defend off mustangs. All while having AC!!! .
Got a nice Washington DC mission coming up in a few months. Was going to build an LS camaro, but this will get me back to my roots. The LT roots that is. I mean what else am I going to spend $3000 a month on. I know A 427CI LT1 thats what!!!
Im thinking 427ci, AFR 227 heads, with a docile cam (24X/25X .6XX/.6XX 108lsa) 6 speed, S60 w, 4.56's. Vic Jr intake, elbow 90mm tb, And have kooks make up a stepped header (1 7/8-2). That would be a great DD, with some power to defend off mustangs. All while having AC!!! .
Got a nice Washington DC mission coming up in a few months. Was going to build an LS camaro, but this will get me back to my roots. The LT roots that is. I mean what else am I going to spend $3000 a month on. I know A 427CI LT1 thats what!!!
05-31-2009, 06:16 PM
#24
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I would just convert a set of race flow development heads 18* if I was going to do all this....
But then again I would just get a littleM block and go to a sbc..... I don't see any benifit at all having a LTx at this point in my program...... You could do so much more in a build for this kind of money.
I'm not sure how many of you have driven around 500+ h.p. cars on the street...but things can take a turn for the worst real fast
05-31-2009, 07:55 PM
#25
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Pure street car. Hydraulic roller cam. Just a pure street car. Might see the track 1 or 2 times in its life. Something I can drive coast to coast in if I choose.
05-31-2009, 07:59 PM
#26
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Thats just me though......
05-31-2009, 09:28 PM
#27
How many guys build 396 big-blocks nowadays? 427's? 454's?
None.
They all go bigger whenever they can.
05-31-2009, 09:35 PM
#28
BS...44 more cubes is 44 more cubes. There's no replacement for displacement. A nice torquey 383 will get you 425ft/lbs. A nice torquey 427 "could" get you 475 ft/lbs. That's enough power to feel, easy. People need to realize that building a 383 involves about $1000-$1500 in block-prep and machining. This Dart block only requires minimal work, maybe $200-$300. No word on pricing but I bet it will be around $1700-$1800 or so. So figure $2000 total for an assembly-ready Dart block. I'd pay an extra $500 for 44 more cubes and 50 more ft/lbs of torque.
How many guys build 396 big-blocks nowadays? 427's? 454's?
None.
They all go bigger whenever they can.
How many guys build 396 big-blocks nowadays? 427's? 454's?
None.
They all go bigger whenever they can.
Still not bad considering the price of getting a used ltx block prepped and ready for a 396...then you get all the extra displacement for not much more cash.
05-31-2009, 11:46 PM
#30
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Why did GM make the LS7 a 427??? B/C they can. Why do ricers put on a 88mm turbo on a 4 banger??? B/C they can. Why do women get boob jobs??? B/C they can. Why do I masterbate??? B/C I can.
Things in this world are not done for a purpose. They are done because they can be. That's what makes up unique and special (some more than others).
Things in this world are not done for a purpose. They are done because they can be. That's what makes up unique and special (some more than others).
06-01-2009, 07:29 AM
#31
I drive my mechanical roller all over the place. It is "medium" sized for a 383, 254@050 on a 108. Drives great. MD's 270@050 would drive great in a 427.
I tell ya what, I could build another 75 rwhp with that 427 vs my 383 with my top end on it, it would need a little more headwork and the intake worked over and more cam.....but I see it not to hard to do.
I tell ya what, I could build another 75 rwhp with that 427 vs my 383 with my top end on it, it would need a little more headwork and the intake worked over and more cam.....but I see it not to hard to do.
06-01-2009, 12:42 PM
#33
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I drive my mechanical roller all over the place. It is "medium" sized for a 383, 254@050 on a 108. Drives great. MD's 270@050 would drive great in a 427.
I tell ya what, I could build another 75 rwhp with that 427 vs my 383 with my top end on it, it would need a little more headwork and the intake worked over and more cam.....but I see it not to hard to do.
I tell ya what, I could build another 75 rwhp with that 427 vs my 383 with my top end on it, it would need a little more headwork and the intake worked over and more cam.....but I see it not to hard to do.
07-03-2009, 06:51 PM
#34
well i did some playing around with comp cams cam selection program (alot like desktop dyno but you can only use their cams) and built a 427 lt1 w/ afr 227, ported stock intake with a monoblade, 12.5 compression on gas with the biggest cam they had (292 XFI) and it came out to 630.4 hp 592.6 ft/lbs.
this program seems to be pretty accurate because i also built a stock motor with a cc503 and it cam out to 349 hp
this program seems to be pretty accurate because i also built a stock motor with a cc503 and it cam out to 349 hp
07-03-2009, 07:18 PM
#37
Check the math on that one...single plane wont get you 100hp in a million years. What cfm did you put for the single plane and the heads? What rpm did it say it will peak at?
The numbers seem highly optimistic. I could see between 575 and 600 hp with out of the box 227s and a xfi292 with the single plane and ALL supporting mods, but not any more then that. Certainly nowhere near 700, let alone 728.
The 292 is a horrible NA cam anyway IMO. The 113 LSA and big exhaust duration split makes it look like a nitrous grind. I wouldn't run that cam all motor but 427ci + xfi292 + ported AFRs and a 300 shot would be a nasty combination.
The calculators are fun to play with but the numbers are not really worth anything in the real world.
The numbers seem highly optimistic. I could see between 575 and 600 hp with out of the box 227s and a xfi292 with the single plane and ALL supporting mods, but not any more then that. Certainly nowhere near 700, let alone 728.
The 292 is a horrible NA cam anyway IMO. The 113 LSA and big exhaust duration split makes it look like a nitrous grind. I wouldn't run that cam all motor but 427ci + xfi292 + ported AFRs and a 300 shot would be a nasty combination.
The calculators are fun to play with but the numbers are not really worth anything in the real world.
07-03-2009, 07:56 PM
#38
well i know that but i thought it was kinda interesting. if i wer to build a motor like this, the afrs would be ported as far as they would go with a custom grind cam.
i just put in the flow numbers on afrs website. i didnt know what cfm a single plane flows so i just put in the cfm from the monoblade someone on this site told me, which was 1500 cfm. that did seem a little high to me tho
i just put in the flow numbers on afrs website. i didnt know what cfm a single plane flows so i just put in the cfm from the monoblade someone on this site told me, which was 1500 cfm. that did seem a little high to me tho
07-03-2009, 08:08 PM
#39
well i know that but i thought it was kinda interesting. if i wer to build a morot like this, the afrs would be ported as far as they would go with a custom grind cam.
i just put in the flow numbers on afrs website. i didnt know what cfm a single plane flows so i just put in the cfm from the monoblade someone on this site told me, which was 1500 cfm. that did seem a little high to me tho
i just put in the flow numbers on afrs website. i didnt know what cfm a single plane flows so i just put in the cfm from the monoblade someone on this site told me, which was 1500 cfm. that did seem a little high to me tho
IIIRC a max ported supervic flows in the 330cfm range, but it is a PITA to find flow numbers for intakes, and it has been ages since I checked so that might be wrong...Don't forget that porting an intake that much will hurt air velocity, just like in a set of heads, and may sacrifice low to mid range power numbers.Intakes are flow rated by each runner, just like heads, not the total flow. Ideally you want each intake runner to flow the same or more then the intake port on the head to keep the intake from being a bottleneck.
