427 engine, what to expect...... - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Jose · 09-17-2012, 06:14 PM

So, my friend just finished his 427 engine with a TVS2300. According to the dyno pull, it's making 13psi and 621rwhp and 598torq. We think that the numbers are way low. What do you guys think? We need some feedback before going back to the original setup expectations.

Thanks!!!

Victory_bloodShed · 09-17-2012, 06:29 PM

You need 14 PSI

Sikoriko · 09-17-2012, 06:30 PM

What type of dyno? makes a difference

Synner · 09-17-2012, 06:35 PM

Need a lot more info like compression ratio, fuel system, octane, injectors, AFR, etc.

jsharp · 09-17-2012, 07:04 PM

I have heard that the 427 is not ideal for boost but I have see numbers way higher as well.

Oxtar41 · 09-17-2012, 07:04 PM

Supercharger might be running out of steam for a 427? Especially since its a 2.3L. Dont most 2.3's max out around 17-18 psi on a 376 ci?

BullF-16 · 09-17-2012, 07:09 PM

Quote:

Originally Posted by Synner

Need a lot more info like compression ratio, fuel system, octane, injectors, AFR, etc.

Whipped416 · 09-17-2012, 07:10 PM

Need like more info... if the ls3 was stroked to a 427 watch out as the sidewalls will be very thin..

jrpxxii · 09-17-2012, 07:11 PM

Quote:

Originally Posted by Jose

So, my friend just finished his 427 engine with a TVS2300. According to the dyno pull, it's making 13psi and 621rwhp and 598torq. We think that the numbers are way low. What do you guys think? We need some feedback before going back to the original setup expectations.

Thanks!!!

Im guessing this is about right as this is too much engine for the TVS2300.

BullF-16 · 09-17-2012, 07:12 PM

Quote:

Originally Posted by jsharp

I have heard that the 427 is not ideal for boost but I have see numbers way higher as well.

What?? who told you that? You mean the Maggie is not optimized for the big cubes of the motor. I am pretty surprised this SC was able to pump 13 psi into the motor. Sounds like this particular 427 does not breath as well as it should. Heads? Cam? Exhaust? Need more details.

13 PSI into a well built 427 should get you at least 750RWHP. I am hoping to get 12 PSI out of my D1SC with my HKE built LSX 427 that was built for boost. I figure on about 800rwhp if i can get the 12 Lbs boost to the motor. Will know in a couple weeks. Erik is hand delivering the motor next week

jrpxxii · 09-17-2012, 07:32 PM

Quote:

Originally Posted by BullF-16

What?? who told you that? You mean the Maggie is not optimized for the big cubes of the motor. I am pretty surprised this SC was able to pump 13 psi into the motor. Sounds like this particular 427 does not breath as well as it should. Heads? Cam? Exhaust? Need more details.

13 PSI into a well built 427 should get you at least 750RWHP. I am hoping to get 12 PSI out of my D1SC with my HKE built LSX 427 that was built for boost. I figure on about 800rwhp if i can get the 12 Lbs boost to the motor. Will know in a couple weeks. Erik is hand delivering the motor next week

The problem I see is the Maggie is too small for the motor as a 427 works great for boost when matched to your blower. I'm putting 26lbs thru my 427 and still have lots more boost to get out of my F2.

NC-V · 09-17-2012, 07:53 PM

Quote:

Originally Posted by BullF-16

Sounds like this particular 427 does not breath as well as it should. Heads? Cam? Exhaust? Need more details.

This right here^^ M6 or auto? Running cats? What pulley? O/D cog or balancer? We need info to help, but that thing is def. choked up somewhere.

Jose · 09-17-2012, 08:22 PM

It's a manual, LG full exhaust, Nelson Engine 427, cam that's what I know. I will get more info and post.

kevin1106 · 09-17-2012, 08:30 PM

Quote:

Originally Posted by Jose

So, my friend just finished his 427 engine with a TVS2300. According to the dyno pull, it's making 13psi and 621rwhp and 598torq. We think that the numbers are way low. What do you guys think? We need some feedback before going back to the original setup expectations.

Thanks!!!

Something isn't right for sure.. I'm making 628rwhp with a 376.

09-17-2012, 06:14 PM	#1
Jose Drives: 2010 Camaro 2SS/RS White S/C Join Date: Aug 2010 Location: Puerto Rico Posts: 842 View My Garage	427 engine, what to expect...... So, my friend just finished his 427 engine with a TVS2300. According to the dyno pull, it's making 13psi and 621rwhp and 598torq. We think that the numbers are way low. What do you guys think? We need some feedback before going back to the original setup expectations. Thanks!!! __________________ "It does not matter if you win or loose, what matters is if I win" Carl Fogarty

09-17-2012, 07:04 PM	#5
jsharp NOW CAMMED & SUPERCHARGED Drives: 2010 Camaro 2SS/RS Black w/ IOM Join Date: Oct 2008 Location: Ar Posts: 2,336	I have heard that the 427 is not ideal for boost but I have see numbers way higher as well. __________________ Livernois Motorsports: Maggie 2300 7psi, Livernois 2C cam/L99 to LS3 Conversion, Ported TB, Rotofab w/adm race scoop, adm trans cooler,Kooks headers no cats, Kooks 3" exhaust. METCO breather. Precision 2400 Vigilante TC. Eibach Lowering Springs & Swaybars. BMR Trailing arms, BMR Rear Cradle Bushings, BMR Toe Rods, BMR Differential bushings. Vossen CV3 20's w/ 305 Mickey Thompson @25psi. Zl1 front bumper. OE Zl1 Hood and matte black insert. 556RWHP/500RWTQ L99

09-17-2012, 07:04 PM	#6
Oxtar41 Drives: 700 rwhp 2010 SS Join Date: Sep 2010 Location: Garage.. Posts: 803	Supercharger might be running out of steam for a 427? Especially since its a 2.3L. Dont most 2.3's max out around 17-18 psi on a 376 ci? __________________

09-17-2012, 08:22 PM	#13
Jose Drives: 2010 Camaro 2SS/RS White S/C Join Date: Aug 2010 Location: Puerto Rico Posts: 842 View My Garage	It's a manual, LG full exhaust, Nelson Engine 427, cam that's what I know. I will get more info and post. __________________ "It does not matter if you win or loose, what matters is if I win" Carl Fogarty

09-17-2012, 06:29 PM	#2
Victory_bloodShed Drives: 2011 Camaro Join Date: Mar 2011 Location: Alabama Posts: 61	You need 14 PSI

09-17-2012, 06:30 PM	#3
Sikoriko Drives: 2011 V6 IOM Join Date: Jul 2012 Location: San Diego Posts: 1,385 View My Garage	What type of dyno? makes a difference

09-17-2012, 06:35 PM	#4
Synner Drives: cars Join Date: May 2011 Location: Oversneeze Posts: 4,544	Need a lot more info like compression ratio, fuel system, octane, injectors, AFR, etc.

09-17-2012, 07:10 PM	#8
Whipped416 Drives: 2010 CAMARO SS Join Date: Mar 2011 Location: Texas Posts: 1,515 View My Garage	Need like more info... if the ls3 was stroked to a 427 watch out as the sidewalls will be very thin..