8.1 performance - Pirate4x4.Com : 4x4 and Off-Road Forum

odin544 · 02-15-2008, 07:44 PM

Does anyone know, preferably from experience, what can be done to the 8.1 to get a little more performance out of it?

I know it is a pretty broad question. I know there is the whipple SC. I am actually looking at one right now thinking about that. I do not want to bore the motor out. There are no aftermarket heads. No aftermarket intake. Marine injectors are larger than stock automotive ones.

I was thinking maybe a cam swap, larger throttle body, larger injectors. I've heard you can swap in the zz502 cam? I dunno someone come up with some ideas.

r0nin89 · 02-15-2008, 08:55 PM

2 seconds on google http://www.raylarengine.com/

odin544 · 02-15-2008, 09:13 PM

Quote:

Originally Posted by r0nin89

2 seconds on google http://www.raylarengine.com/

very nice for $7000. Seems there cams are designed around there heads. Wonder how they will work on a stock head. I'd like to stay away from boring out the motor or buying new heads though. Something under a grand would be cool. If I could find a nice set of headers that would fit inside the fraim rails or my truck that would be cool too. I havent seen any yet though other than having custom headers made. I think I will email them about their intake a TB though.

The whipple supercharger looks like it might be more bang for the buck on a stock 8.1.

Bo185 · 02-15-2008, 10:17 PM

The WHIPPLE is the best bang for your buck! it turns the 8.1L in to a beast! You won't be sorry!

Ten_Bucks · 02-15-2008, 10:27 PM

T Byrne Motorsports has tons of stuff for the 8.1 engine.

http://tbyrne.com/

Scott

Jeepocabra · 02-15-2008, 10:36 PM

GM chokes the hell out of these motors, stock in a mastercraft boat they make 425hp vs the 340hp and 455ft/lbs in the truck. Best bang would be a good re flash of the computer.

odin544 · 02-15-2008, 10:38 PM

that will definitely be done. I wont be running any emissions either.

Filthy McChevy · 02-16-2008, 08:21 AM

I did a saved search on Ebay for a Whipple SC for my 93 454. Took 6 months but I got the whole set up for under 2 grand. I have had it on for several years now and it has been trouble free. Its a no BS power mod.

jdraizor · 02-16-2008, 06:15 PM

STS turbo would be another option if you wanted a turbo instead of a supercharger.
http://www.ststurbo.com/gm_trucks
I have seen a video on youtube of an 8.1 running this setup.

02-15-2008, 07:44 PM	#1 (permalink)
odin544 Registered User Join Date: Apr 2004 Member # 29622 Location: Kennewick, Washington Posts: 1,763	8.1 performance Does anyone know, preferably from experience, what can be done to the 8.1 to get a little more performance out of it? I know it is a pretty broad question. I know there is the whipple SC. I am actually looking at one right now thinking about that. I do not want to bore the motor out. There are no aftermarket heads. No aftermarket intake. Marine injectors are larger than stock automotive ones. I was thinking maybe a cam swap, larger throttle body, larger injectors. I've heard you can swap in the zz502 cam? I dunno someone come up with some ideas. Last edited by odin544; 02-15-2008 at 07:44 PM.

02-15-2008, 08:55 PM	#2 (permalink)
r0nin89 Registered User Join Date: Oct 2006 Member # 80727 Location: Jackson, NJ Posts: 1,072	2 seconds on google http://www.raylarengine.com/ __________________ 1994 Isuzu Trooper: OM617/W56/toybox 4.56 Dana 44 w/ lockright/6 lug Ford 8.8 4.56 Ox locker

02-15-2008, 10:17 PM	#4 (permalink)
Bo185 Vortec Scout II Join Date: Jun 2005 Member # 48545 Location: Arkansas / "The Stan" Posts: 3,598 Blog Entries: 1	The WHIPPLE is the best bang for your buck! it turns the 8.1L in to a beast! You won't be sorry! __________________ '73 Scout II Vortec 6.0L 4L65e np241 '73 1210 Travelette SV392, T-34, 60/14bff 4.56's 35's '01 VW Beetle TDI-50mpg or better! GM Gen III/IV V8 swap info TECH: Gen III/IV "LS motor" to Early GM Auto Trans

02-15-2008, 10:27 PM	#5 (permalink)
Ten_Bucks Registered User Join Date: Sep 2001 Member # 7011 Location: Placerville, California Posts: 821	T Byrne Motorsports has tons of stuff for the 8.1 engine. http://tbyrne.com/ Scott __________________ [URL="http://facebook.com/tenbucks76"]http://facebook.com/tenbucks76[/URL]

02-16-2008, 06:15 PM	#9 (permalink)
jdraizor Registered User Join Date: Jan 2007 Member # 85135 Location: Atlanta, Ga Posts: 65	STS turbo would be another option if you wanted a turbo instead of a supercharger. http://www.ststurbo.com/gm_trucks I have seen a video on youtube of an 8.1 running this setup. __________________ 87 V30 454 Turbo 400 14 bolt d60 37's (project) [thread=550340]Build Thread[/thread] 2007 Chevy 2500HD 6.6 Duramax/Allison(tow rig/daily driver) Dunleavy2004 on CK5 JDraizor on Dieselplace

02-15-2008, 10:36 PM	#6 (permalink)
Jeepocabra Registered User Join Date: Jul 2007 Member # 94930 Posts: 86	GM chokes the hell out of these motors, stock in a mastercraft boat they make 425hp vs the 340hp and 455ft/lbs in the truck. Best bang would be a good re flash of the computer.

02-15-2008, 10:38 PM	#7 (permalink)
odin544 Registered User Join Date: Apr 2004 Member # 29622 Location: Kennewick, Washington Posts: 1,763	that will definitely be done. I wont be running any emissions either.

02-16-2008, 08:21 AM	#8 (permalink)
Filthy McChevy Registered User Join Date: Jan 2008 Member # 106663 Location: South Park CO Posts: 1,547	I did a saved search on Ebay for a Whipple SC for my 93 454. Took 6 months but I got the whole set up for under 2 grand. I have had it on for several years now and it has been trouble free. Its a no BS power mod.

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