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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 12-28-2009, 05:13 PM   #1
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Texas Speed & Performance 427 LS3 Rotating Assy

Hey guys like it says up top i was wondering how much work would it take to build a 427 out of the ls3. Im not to sure about alum blocks and how you would bore out the cylinder walls. Im kinda stuck between building a stroker motor or just cammin/bolt on's. So any input would be awesome
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Old 12-28-2009, 05:35 PM   #2
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i don't think you can get a 427 out of a LS3, its a 416 or 418 CI but get the new 454 lsx that is how you will make power LSX7 heads All forged motor and 6 bolts heads.
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Old 12-28-2009, 05:40 PM   #3
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^^^+1 i think u can go 416 but 427 is not an option. U can but a LS7 from any dealership though
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Old 12-28-2009, 05:46 PM   #4
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Oh i wonder why they have that on there web site.. Oh well guess its bolts on and a cam. Not sure if i would have the money for the LSX7 im sure its up there. Is there any other places that sell good cam's i see most of them are around $500.00 for the cam or i can get the kit for $800.00 im not worried about install i have the hook up with all my techs................This is what is on there web site

Item Detail


Name:
Texas Speed & Performance 427 LS3 Rotating Assy.
Item#:
25-TSP427LS3


Texas Speed & Performance rotating assemblies offer the best durability with the best pricing available! Our 427 cid LS3/L92 rotating assemblies come standard with a forged 4.100" stroke Callies Compstar crankshaft, Eagle H-Beam 6.125" connecting rods with ARP 8740 rod bolts, and your choice of Wiseco forged pistons that come standard with a steel top/napier second piston ring set! All of the Wiseco piston sets are built to accept any LS1, LS2, LS3, LS6, LS7, and L92 cylinder heads! You can choose from a variety of upgrades for the crankshaft, connecting rods, and pistons! Bearings are not included in the base price but can be added to your rotating assembly package. Give us a call, and we will be happy to spec out a rotating assembly that will match your needs!
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Old 12-28-2009, 05:53 PM   #5
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If i do the numbers yes you can do a 427 on a LS3 but that is bore out the cylinder walls to 4.070 that is a lot if you don't re sleeve it, You are beter off going with a 418 and not bore out the cylinder walls.
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Old 12-28-2009, 06:25 PM   #6
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Quote:
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If i do the numbers yes you can do a 427 on a LS3 but that is bore out the cylinder walls to 4.070 that is a lot if you don't re sleeve it, You are beter off going with a 418 and not bore out the cylinder walls.


This makes no sense.

A 418 has a 4.070 Bore.

A 416 uses a 4.065 Bore.



OP,

You can definately do a 427 LS3.

All you need is this.

Callies Compstar #APU317-CS Forged Crankshaft
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Old 12-28-2009, 08:25 PM   #7
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Sounds good but id rather get built a short block and just sell the stock one
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Old 12-28-2009, 08:35 PM   #8
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You dont need a stroker motor to go fast or make power
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Old 12-28-2009, 10:27 PM   #9
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Proline makes a 427 out of a stock LS3 block as well. It is easily done.
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Old 12-28-2009, 10:45 PM   #10
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You can definitely get a 427. They are all crankshaft stroke. Also you should not boost one too much, as most builders will tell you the rings are too high on the piston. (but some others will do it all day long). Just voicing my opinion.
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Old 12-28-2009, 10:49 PM   #11
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Right on ZZ. Im going to be boosting the 418 though. Maybe 15 psi or so. Coming soon to a track....
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Old 12-28-2009, 10:51 PM   #12
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Right on ZZ. Im going to be boosting the 418 though. Maybe 15 psi or so. Coming soon to a track....
The 418 is the way to go for boost, there is no doubt. I may be doing the sam ehere very soon. It all depends on my sponsorships...I cant afford to do it on my own right now, business has been down.
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Old 12-28-2009, 10:54 PM   #13
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Im figuring the 418 and some head work with a good cam and my turbo is worth say 1000 hp.....
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Old 12-28-2009, 11:05 PM   #14
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It could be....now get a drivetrain that can handle it, and stick it to the ground and you are good to go!!! LOL

I will nto be going that high in HP, but it will not be too far behind.
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Old 12-29-2009, 08:08 AM   #15
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Well let me look at it this way..... I guess i could do a slow build now one thing i need to know is if i just buy a stock ls3 block and have all the work done for a 418 i know most places charge a diff fee but on average how much would it run just to get the block ready?
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Old 12-29-2009, 09:03 AM   #16
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427 LS3 is no problem we typically have several of them in stock! The feature a 4.100" stroke crankshaft. These 427 LS3 engines can make near 600rwhp if setup correctly. That being said it all depends on what combo your building! The best bet is to call & talk to one of our sales guys about your mods & goals. This way you don't get a bunch of bad information.....

4.070" bore is not a problem at all on the LS3 block. I've done a few 4.100" for testing!

If your feeling really crazy you could even get your ls3 block sleeved & build a BIG CID engine! I'm getting ready to assemble a 454 sleeved motor for my 2010 late this week! I'll take pics for you guys & provide engine & chassis dyno results!!
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Old 12-29-2009, 12:48 PM   #17
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I dont want anything crazy maybe 450-500rwhp im sure i can get more out of it but my idea is to just build another motor that way its ready when my warranty is done and gone ill have somthing to throw in there...... Im sure i can get away with a cam and tune since i can pull some strings at work...im just use to dealing with ls1 were you have to sink a ton of money in to it to get good HP numbers. But from what i hear you dont have to do a whole lot to the ls3 to get up there..... Sorry for just going on and on but im just lost with this car ha
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Old 12-29-2009, 01:18 PM   #18
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Heads cam will easily get you to that power level. My car is very streetable & makes 500rwhp with heads cam. You can definitely make more than 500rwhp, depending on how aggressive you get.
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Old 12-29-2009, 01:26 PM   #19
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Is this heads and cam only or CAI and full exhaust?
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Old 12-29-2009, 01:26 PM   #20
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Heads cam will easily get you to that power level. My car is very streetable & makes 500rwhp with heads cam. You can definitely make more than 500rwhp, depending on how aggressive you get.
I agree completely. You will make that number with just heads/cam/exhaust.

The 427 will make quite a bit more rear wheel!!!
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Old 12-29-2009, 02:33 PM   #21
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Now i know alot of people do LT and full exhaust but how much decrease will you see if you just do cam only and a dyno tune.... Most companys advertise the HP of there cam shaft but what im not clear on is it only the cam shaft and tune or are these gains with other mods? I would like to see gains from a sock car with a cam up-grade only... Like Jason is saying he made 500rwhp with heads and cam..... Now if i purchase the same heads and cam you have will i see the 500hp mark or will i need to purchase LT and a CAI?
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Old 12-29-2009, 03:57 PM   #22
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Now i know alot of people do LT and full exhaust but how much decrease will you see if you just do cam only and a dyno tune.... Most companys advertise the HP of there cam shaft but what im not clear on is it only the cam shaft and tune or are these gains with other mods? I would like to see gains from a sock car with a cam up-grade only... Like Jason is saying he made 500rwhp with heads and cam..... Now if i purchase the same heads and cam you have will i see the 500hp mark or will i need to purchase LT and a CAI?
me too but i doubt anybody would put an aggressive cam with a restricted intake and exhaust
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Old 12-29-2009, 06:01 PM   #23
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The car absolutely had headers & air intake
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