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08-03-2018
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#1 |
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Join Date: Jun 2018
Location: Elko mn
Posts: 49
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Finally did it
It took a couple of years to rehab it but as of today, we took our first steps into performance upgrades. I had a set of stainless works headers put on as well as the air box opened up and the accompanying tune from DRM. I couldn't be more pleased.
With just the air box (and k&n) and headers running into the ol flow master exhaust it dynoed at 383 rwhp (which I'm told is roughly 445-450 at the motor) It's pretty awesome the way the lt5 likes air. Topped off with the ferocity of the noise and I'm thinking I did a good thing. |
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08-03-2018
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#2 | |
 
Join Date: Jul 2012
Location: Allentown, PA
Posts: 309
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Re: Finally did it
Quote:
Sent from my HTC U11 using ZR-1 Net Registry mobile app
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'95 ZR-1, aqua/gray, #167 368 LPE/Haibeck, Web cams, Stainless Works headers, B&B Fusion exhaust, 18" Fikse wheels, Alcon brakes, lowered. 491 SAE RWHP. |
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08-03-2018
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#3 |
 
Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
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Re: Finally did it
Congratz! Oh these motors do respond well to a little more AIR! And, there is still more "low hanging fruit" when you're ready!
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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 |
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08-04-2018
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#4 | |
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Join Date: Jun 2018
Location: Elko mn
Posts: 49
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Re: Finally did it
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I suppose the logical next step is .... Opening up the plenum some? Larger throttle body? Next spring I want to go back to Haibeck for something...just not sure what. |
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08-04-2018
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#5 | |
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Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
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Re: Finally did it
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FYI, if you have a goal for the motor, modifications can be done in phases - each providing a significant increase in performance at considerably less cost than having to do it in one chunk. So! There are options to performance mods. In the mean time, you'll learn more about what mods the various mods are and what they cost: where the low-hanging fruit IS, and what to save you $$ on until later, etc., etc. It's a fun journey! Welcome to the madness!
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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 |
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08-04-2018
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#6 |
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Join Date: Jun 2018
Location: Elko mn
Posts: 49
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Re: Finally did it
I'm pretty sure I'll end up increasing the engine size at some point, I'm just not sure which one. Haibeck seems to be a big fan of the 385, but Pete's 391 sounds impressive as well.... And then there's DRM, though he doesn't see the lt5 as much anymore...
I'll probably end up chickening out next year do a flywheel and 4.10 combo platter |
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08-05-2018
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#7 |
Join Date: Mar 2018
Location: Norway
Posts: 345
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Re: Finally did it
Many goodies here.
http://www.zr1specialist.com/HAT%20W...20upgrades.htm Sent from my SM-G955F using ZR-1 Net Registry mobile app
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Roy Martin 1994 ZR-1 #112 Admiral Blue/Black Dana 4:10 Aluminum flywheel Corsa exhaust Watson headers Haibeck chip 470 HP/399 RWHP 1991 ZR-1 #400 White/Red (SOLD) Dana 4:10 Powder coated engine Haibeck performance chip Borla exhaust |
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08-05-2018
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#8 | |
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Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
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Re: Finally did it
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However, that link to Marc's web site says it perfectly: Once the LT5 is ported and festooned with headers/exhaulsts, etc., paying a premium for a 405 HP car - one intended to be modded to 500+ hp is moot once the mods are completed. If modding is in the car's future, an earlier 90-92's lower $$ tag leave money toward those mods. Just a thought. But, that said, the 94 and especially the 95 Zs are the real cream puffs; 'pick of the (C4) litter'. PS: Something just occured to me... IF one was going to do a "500+" hp upgrade anyway, he'd be $$ ahead to sell/swap the DUNN heads (assuming his car had them) to (say) someone with the Birmal heads for a profit and use the $$ toward the mods. Point is, after full porting, the original casting of the two heads - Dunn and Birmal - is completely and forever altered to comply with the "500" specifications.  .
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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 Last edited by Paul Workman; 08-05-2018 at 09:49 AM. |
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08-07-2018
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#9 |
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Join Date: Jun 2018
Location: Elko mn
Posts: 49
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Re: Finally did it
I was always under the impression that most 94s, if they did have Dunn's, it was only one.
Either way, getting into the heads is a ways away. Even if it has a pair, I doubt I would part with them. |
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08-07-2018
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#10 |
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Join Date: Jun 2015
Location: Texas
Posts: 530
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Re: Finally did it
My 91 dynes about the same as yours with similar mods, for me that plenty quick on public roads. To be honest my next mods will be brakes and Noise, Vibration and Harshness issues. I can see the 500hp being a bunch of fun, but I will rarely use it. Good Brakes, and suspension I will use. Just my 2 cents.
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