LT5 engine upgrade question - ZR-1 Net Registry Forums

1995BLACKZR1 · 07-19-2015

I've recently visited Marc Haibecks website and see that he does engine upgrades which is kind of intriguing... I think in about 3 years I'll be interested in upgrading to the 350ci engine which is 510 horsepower. Has anyone done this engine procedure or higher by Marc and can tell me what the experience was like and how do you like your car now?

I have a B&B exhaust so I don't know if that would make it cheaper.

Paul Workman · 07-19-2015

I and many others (can chime in too) can attest to the performance a pure joy the "500 package" upgrade for the 350 cid LT5 is!

And ALL of that performance comes while maintaining the stock block/bottom end, and cams. All of it is the result of turning the motor loose; letting it breath, with top-end porting and headers and lighter flywheel. You loose NONE of the stock driveability and reliability, while maintaining a stock idle!

The modification completely changes the personality of the car. What's not to like??

We Gone · 07-19-2015

Start saving your penny's now, the only thing you may regret is not going for more HP.

1995BLACKZR1 · 07-19-2015

That sounds great. The person I bought my ZR-1 from says the B&B exhaust he had put on gives it 70 more horsepower. Would anyone know if this is true or not? I will be saving my pennies, why not especially if I'm gonna have the car for a LONG time. The horsepower is great on it now but why stop now

JimZRyd · 07-19-2015

I'm planning on sending my 94 to Marc hopefully in the next year and go for the 510 package or maybe one more step up. Depends on a few factors. I currently have a Corsa but have a new 3" B&B I want to switch out to. 70 more HP from just any exhaust seems a bit much. I don't even think B&B even advertise but like 20 to 30 max.

Vette73 · 07-19-2015

70 horsepower? No way...The real gain when you touch the exhaust is the headers...When I swapped out my stock system for headers and exhaust I saw how restrictive the exhaust manifolds were on my 91.....That 510 package looks great and Marc seems like a very knowledgable guy when it comes to the LT-5..

PhillipsLT5 · 07-19-2015

Marc & package TOTALLY LEGIT, adjust package to fit your wants, 500 HP really wakes car up, aprox 100 HP more at rear wheels over factory

1995BLACKZR1 · 07-19-2015

Awesome. I really like how his power point presentation make it easy to understand. Good selling point. I would love to do it. I will be saving some pennies! If the 405 horsepower is this much fun I can't will until over 500 horses!

diamond zr1 · 07-19-2015

and why stop there/600 h/power is really fun/go for cubic inch if you can//Phil's car will run with a new z06 and w/out the blower //at least in a quarter mile/

1995BLACKZR1 · 07-19-2015

I saw the 650 hp engine upgrade was $30,000. Lol. I wonder if anyone has that upgrade? That would be amazing. It could beat about anything

07-19-2015	#1
1995BLACKZR1 Join Date: Jun 2015 Location: Wichita, KS Posts: 8	LT5 engine upgrade question I've recently visited Marc Haibecks website and see that he does engine upgrades which is kind of intriguing... I think in about 3 years I'll be interested in upgrading to the 350ci engine which is 510 horsepower. Has anyone done this engine procedure or higher by Marc and can tell me what the experience was like and how do you like your car now? I have a B&B exhaust so I don't know if that would make it cheaper.

07-19-2015	#2
Paul Workman Join Date: Nov 2007 Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri Posts: 6,493	Re: LT5 engine upgrade question I and many others (can chime in too) can attest to the performance a pure joy the "500 package" upgrade for the 350 cid LT5 is! And ALL of that performance comes while maintaining the stock block/bottom end, and cams. All of it is the result of turning the motor loose; letting it breath, with top-end porting and headers and lighter flywheel. You loose NONE of the stock driveability and reliability, while maintaining a stock idle! The modification completely changes the personality of the car. What's not to like?? __________________ Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry

07-19-2015	#3
We Gone Join Date: Apr 2004 Location: ATL. GA. Posts: 2,162	Re: LT5 engine upgrade question Start saving your penny's now, the only thing you may regret is not going for more HP. __________________ Steve 1990 Steel Blue/Black #2355 1990 Red/Red #1473 1991 Quasar /Black #118 Sold 1991 Turquoise/Black #766 Parted Out 1993 Yellow/White #179 Sold 1990 Black/Gray #1361 Headers/4:10s Sold

07-19-2015	#4
1995BLACKZR1 Join Date: Jun 2015 Location: Wichita, KS Posts: 8	Re: LT5 engine upgrade question That sounds great. The person I bought my ZR-1 from says the B&B exhaust he had put on gives it 70 more horsepower. Would anyone know if this is true or not? I will be saving my pennies, why not especially if I'm gonna have the car for a LONG time. The horsepower is great on it now but why stop now

07-19-2015	#5
JimZRyd Join Date: Jan 2012 Location: Florence, SC Posts: 1,336	Re: LT5 engine upgrade question I'm planning on sending my 94 to Marc hopefully in the next year and go for the 510 package or maybe one more step up. Depends on a few factors. I currently have a Corsa but have a new 3" B&B I want to switch out to. 70 more HP from just any exhaust seems a bit much. I don't even think B&B even advertise but like 20 to 30 max. __________________ Jim Zorgias 1994 ZR-1 Admiral Blue/Black #245 1996 Callaway Supernatural 450

07-19-2015	#6
Vette73 Join Date: Nov 2014 Location: Brooklyn ny Posts: 1,045	Re: LT5 engine upgrade question 70 horsepower? No way...The real gain when you touch the exhaust is the headers...When I swapped out my stock system for headers and exhaust I saw how restrictive the exhaust manifolds were on my 91.....That 510 package looks great and Marc seems like a very knowledgable guy when it comes to the LT-5..

07-19-2015	#7
PhillipsLT5 Join Date: Aug 2005 Location: Scottsdale, AZ Posts: 2,450	Re: LT5 engine upgrade question Marc & package TOTALLY LEGIT, adjust package to fit your wants, 500 HP really wakes car up, aprox 100 HP more at rear wheels over factory

07-19-2015	#8
1995BLACKZR1 Join Date: Jun 2015 Location: Wichita, KS Posts: 8	Re: LT5 engine upgrade question Awesome. I really like how his power point presentation make it easy to understand. Good selling point. I would love to do it. I will be saving some pennies! If the 405 horsepower is this much fun I can't will until over 500 horses!

07-19-2015	#9
diamond zr1 Join Date: Sep 2006 Location: diamond lake /washington Posts: 223	Re: LT5 engine upgrade question and why stop there/600 h/power is really fun/go for cubic inch if you can//Phil's car will run with a new z06 and w/out the blower //at least in a quarter mile/

07-19-2015	#10
1995BLACKZR1 Join Date: Jun 2015 Location: Wichita, KS Posts: 8	Re: LT5 engine upgrade question I saw the 650 hp engine upgrade was $30,000. Lol. I wonder if anyone has that upgrade? That would be amazing. It could beat about anything