427 Short Block
09-13-2006, 11:22 PM
#21
Originally Posted by SLED28
Beast96z: Ok gotcha... But a 4.100 x 4.125 bore is a 438cube... This would cost a little more because a custom pistom will need to be made for the extra .100" of stroke, but not much, maybe 2-300 dollars. So it looks like this would cost right around $7100
09-14-2006, 08:01 AM
#22
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Originally Posted by SLED28
The Lunati crank is another 500, I wouldn't recommend lunati rods, maybe a billet oliver would be nice,add 1000. Thats top of the line components. I also use Wiseco pistons with the 1/16 1/16 3/16 ring package for a bit more seal then a metric ring set.
Got another question though. The parts off of my 346 were going to be swapped over to an LS2. Will they still work on a 427? The parts are the G5X3 cam, AFR 205 59cc heads (staying N/A high compression) and LG Pro Long Tubes 1 3/4" I would be upgrading to a ported 90 mm fast intake and a 90 mm TB. I know that the 205 heads are going to limit my top end power production, but my throttle response and low end power and torque should be nuts. Absolutely instantaneous!! Not looking to wait until 5800-6800 rpms to see serious power. I did that with my current motor and I am not totally satisfied. As the saying goes, "theres no replacement for displacement." One more thing about the heads, could a little reworking of the heads free up a lot more air flow?
Several members have had great success with AFR 205's 59 cc heads on 402's and 408's. I would like your opinion on a 427? Thanks again.
09-14-2006, 08:22 AM
#23
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Yes we can re-use your heads, cam, headers, etc... The 205's will work on the 427, you proballbly will squeeze out 500rwhp with the big cubes and at least that in torque! I would degree the cam a little different and try to move the power band up a little to help it topend, maybe even pull a degree or two out in the programming at high rpm's for a little extra topend.
I would leave the heads alone, save the money... When you need more, sell the 205's as stock from the factory and buy 225's later!
I would leave the heads alone, save the money... When you need more, sell the 205's as stock from the factory and buy 225's later!
09-14-2006, 10:23 AM
#24
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What kind of turn around time would you need if lets say I showed up Monday morning an hour before the shop opens and push in a cool car?? You would already have my new block assembled and would need to pull my current motor and swap parts, and reinstall, then tune and dyno. How many days for something like that?? Also ballpark price, roughly +/- 1000 bucks just to give me an idea.
I sent you an email as well.
I sent you an email as well.
09-14-2006, 11:24 PM
#26
Sled28
At this point I'm not ready to this but what are the choices if I wanted to go with a 427 and use my 388 block? It only has a couple thousand miles on it at this point and was replaced under warranty last year. I want to make sure the block holds up which at this point it seems perfect, then look into a 427 rotating assembly.
Sorry to hijack the thread but there is a lot of good info in here.
Bobby
At this point I'm not ready to this but what are the choices if I wanted to go with a 427 and use my 388 block? It only has a couple thousand miles on it at this point and was replaced under warranty last year. I want to make sure the block holds up which at this point it seems perfect, then look into a 427 rotating assembly.
Sorry to hijack the thread but there is a lot of good info in here.
Bobby
09-15-2006, 12:03 AM
#30
While I know you can't get specifics but for a setup that would handle say 500rwhp and a 100 shot what kind of ball park 3k, 5k ??
The car is basically done suspension, 9inch, TEA stage III heads, TPIS 90mm oval intake, etc so the last mod I really have to do (within reason) is a 427.
The car is basically done suspension, 9inch, TEA stage III heads, TPIS 90mm oval intake, etc so the last mod I really have to do (within reason) is a 427.
09-15-2006, 12:12 AM
#31
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A $2500 427 rotating will handle that power no problem. This is a custom spec piston and good for a 300+ shot, so you will be extra safe if you use a 100 or even 150 shot!
You'll make 525+ depending on how big you would like to go with the cam. You'll be around 4500 for a whole new shortblock (other then your block) and your heads swapped over. A Rollmaster double chain, ported oil pump, new custom cam, pushrods, etc. Everything needed to complete the motor so its ready to drop in.
Oh you could also install a set of morel lifters and still be under 5000.
You'll make 525+ depending on how big you would like to go with the cam. You'll be around 4500 for a whole new shortblock (other then your block) and your heads swapped over. A Rollmaster double chain, ported oil pump, new custom cam, pushrods, etc. Everything needed to complete the motor so its ready to drop in.
Oh you could also install a set of morel lifters and still be under 5000.
03-02-2007, 08:15 AM
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Wow this makes me feel like a idiot! I just bought a Maganchager to put on my ls6 and also have a 2,000 repair bill for my bent exhaust valve and broken spring. That is $7,500 for everything. From what I see here I could have dropped a monster N/A in my CTS-V and had more HP than the current set up. WOW! Anyone want a LS6 with a blower? Joking as I'm now broke! I need to learn a whole lot more about engines.
03-02-2007, 10:15 AM
#36
Originally Posted by allngn_c5
Hey thanks for the response.
Got another question though. The parts off of my 346 were going to be swapped over to an LS2. Will they still work on a 427? The parts are the G5X3 cam, AFR 205 59cc heads (staying N/A high compression) and LG Pro Long Tubes 1 3/4" I would be upgrading to a ported 90 mm fast intake and a 90 mm TB. I know that the 205 heads are going to limit my top end power production, but my throttle response and low end power and torque should be nuts. Absolutely instantaneous!! Not looking to wait until 5800-6800 rpms to see serious power. I did that with my current motor and I am not totally satisfied. As the saying goes, "theres no replacement for displacement." One more thing about the heads, could a little reworking of the heads free up a lot more air flow?
Several members have had great success with AFR 205's 59 cc heads on 402's and 408's. I would like your opinion on a 427? Thanks again.
Got another question though. The parts off of my 346 were going to be swapped over to an LS2. Will they still work on a 427? The parts are the G5X3 cam, AFR 205 59cc heads (staying N/A high compression) and LG Pro Long Tubes 1 3/4" I would be upgrading to a ported 90 mm fast intake and a 90 mm TB. I know that the 205 heads are going to limit my top end power production, but my throttle response and low end power and torque should be nuts. Absolutely instantaneous!! Not looking to wait until 5800-6800 rpms to see serious power. I did that with my current motor and I am not totally satisfied. As the saying goes, "theres no replacement for displacement." One more thing about the heads, could a little reworking of the heads free up a lot more air flow?
Several members have had great success with AFR 205's 59 cc heads on 402's and 408's. I would like your opinion on a 427? Thanks again.
03-02-2007, 10:23 AM
#37
Another thing, TSP has an LS7 based 427 for $6000 with an Eagle 4" Crank, Diamond Pistons, and Scat H-Beam Rods with LS2 Double Roller Timing Chain, all LS2 conversion stuff, and Cam Sensor and Knock Sensor Harness Extensions. It also includes the engine crate, engine cradle, and truck freight shipping charges.
It's $6600 with Callies Dragonslayer crank and Compstar Rods. That's a pretty good deal considering it includes shipping.
It's $6600 with Callies Dragonslayer crank and Compstar Rods. That's a pretty good deal considering it includes shipping.
