My 427 Project
Thread Starter
Le Mans Master
Joined: Apr 2001
Posts: 5,474
Likes: 717
From: Black Forest CO
My 427 Project
A while back I decided to forsake FI and do a big inch engine for my C5. I did a ton of research and decided to do a 427.
I bought all of the parts from Corvette Forum and LS1 Tech sponsoring vendors. A local shop, RMCR, is doing the assembly work for me. Today I stopped by and the long block was just about done (no valvetrain yet).
Tip of the day: I converted to a LS2 pan. The oil filter on the 07+ engines is different than previous years.
I bought all of the parts from Corvette Forum and LS1 Tech sponsoring vendors. A local shop, RMCR, is doing the assembly work for me. Today I stopped by and the long block was just about done (no valvetrain yet).
Tip of the day: I converted to a LS2 pan. The oil filter on the 07+ engines is different than previous years.
Last edited by 7LitreC5; Apr 7, 2007 at 09:36 AM.
Thread Starter
Le Mans Master
Joined: Apr 2001
Posts: 5,474
Likes: 717
From: Black Forest CO
The LS7 block (what I have) with a stock stroke yields 427 ci (427.7 ci actually). There are several other combinations of bore and stroke that will give you the same displacement on a LSx.
Thread Starter
Le Mans Master
Joined: Apr 2001
Posts: 5,474
Likes: 717
From: Black Forest CO
Safety Car
Joined: Jan 2001
Posts: 3,879
Likes: 3
From: Hobart, WI
I just did the same motor in a friend's C5. LS7 wet sump with c6 pan/ported l92/l76. Great combo!
Mine is 402 with same heads, intake.
The idle tuning will be a real challenge, let me know when you are ready-
Mine is 402 with same heads, intake.
The idle tuning will be a real challenge, let me know when you are ready-
Melting Slicks
Joined: Jun 2005
Posts: 3,088
Likes: 61
From: NY- 2013 Corvette Challenge Champion-2013 Index Combo Champion 2015 CC/MM Champion
St. Jude Donor '07
Wow that looks nice.Do you have a part # for the oil pan? Did you have to get a new low oil sensor or does the LS1 fit?..........Paul
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Drifting
Joined: Jul 2004
Posts: 1,713
Likes: 2
Having had one now for over a year I can tell you it is a joy to drive everyday. Mine is a daily driver and has been very docile on stop and go traffic in Atlanta. The torque is right there when you want it (400 rwftlbs at 2500rpm
)so you always have the power quickly available. There is really no substitute for cubic inches.
)so you always have the power quickly available. There is really no substitute for cubic inches.
Thread Starter
Le Mans Master
Joined: Apr 2001
Posts: 5,474
Likes: 717
From: Black Forest CO
Burning Brakes
Joined: Nov 2004
Posts: 988
Likes: 4
From: Livermore CA
You will love that motor, I built a Darton sleeved 440 for my Z with a very similar cam 232 240 117 and it is an electric motor freight train. low speed roll ons in fourth and fith from 30mph are unreal. With a mild cam like this, for having a lot of displacement, the power and torque are really controllable. Idle tuning is tough with the LS2 90mm. Have fun.
John
John
Safety Car
Joined: Jan 2001
Posts: 3,879
Likes: 3
From: Hobart, WI
Le Mans Master
Joined: Nov 2003
Posts: 8,004
Likes: 250
From: Tampa Fl
St. Jude Donor '12-'13-'14
I just wanted to thank you guys for installing the 427s and figuring it out. Im sure in a couple years Ill be do for a new motor and you guys will have it all figured out.