U.D. pulleys & 160 T-stat G.P. - Page 3 - ZR-1 Net Registry Forums

902066 · 10-01-2007

I would be interested in a T- stat if you can get a group purchase going.

1990 quasar blue · 10-01-2007

I sent Randy an email tonight. I'll keep everyone posted.

Greybeard ZR1 · 10-03-2007

Those dyno numbers on the company website should be highly suspect. Randy's magic 405 hp. LT5 now makes 482 hp. (482-15%=409.7rwhp.), with the addition of headers and exhaust, a lightweight flywheel, some coolant parts, underdrive pulleys, and a dyno tune. yeah...right.
Guys, people have been tweaking the LT5 for more than 15 years now, and nobody has gotten numbers like that. Not without getting out the old grinder and hogging out the intake flow.

He claims to be getting nearly 460 hp. by just slapping on headers, exhaust, chip, and that magic 160 deg. thermostat. How many of you already have that equipment on your car? I do. Is anyone getting 460 hp.?... c'mon, let's get real.

I applaud his "Project Objectives" - "Obtain maximum horsepower from a stock LT5 utilizing true "bolt-on" performance parts, and without any porting or internal engine modifications." It's just that I don't buy the posted results.

Perhaps they should take that garage queen 5K mi. 95' out to the local dragstrip and post some trap times to back up all the horsepower it supposedly has?

P.S.-Back in the last century, when I bought my 160 deg. stat from A.O. Engineering, it was $35. And I thought that was a ripoff.
Has anyone asked Randy why these are so expensive?

jonszr1 · 10-03-2007

If i may take a moment . i find the hostility of the previous post, unkind at best. why do people have to be so agressive . why cant they just ask nice. I have done business with randy and find him to be a honest person that delivers what he says and his products first rate . so much so i ordered another thermastate for my red car . why not just pm him and ask for his results. or better yet take the time and give him acall instead of (in my opnion )disrespecting him in a public forum . if the previous has been done then sure post your results of the call or pm . why take the chance of hurting a mans rep without doing some homework . jmho

Greybeard ZR1 · 10-03-2007

I'm sorry, I didn't wish to be hostile, or unkind. And I certainly don't want to hurt anyone's feelings. And I don't really need to PM him to ask for his results, they're posted on his website. It's the posted results that I questioned. The results seem to be out of line with the results achieved by numerous tuners that have worked on the LT5 for the past 15 years or so.
Do you think John Lingenfelter, or Doug Rippie would go to the trouble of porting the plenum, injector housings, and heads of the ZR1, if all they had to do was install underdrive pulleys, a thermostat, gaskets, and exhaust on it to get 475+ hp.?

For a more thorough look at what it takes to increase the output of an LT5, i refer you to this presentation by respected long time LT5 tuner Marc Haibeck:

http://www.zr1specialist.com/HAT%20W...%20Paths1b.pdf

Perhaps if Randy's parts have worked their magic on your car, you can share the results with us? dyno numbers? seat of the pants?

Pete · 10-03-2007

Guys a dyno is a tuning device.
Some show hi some show low.

About Randy's Z either the car is a freako or the dyno was a freako.
I really don't think Randy is BSing.
I would think the Dyno could be BSing.

If the car runs 118-120 then it's making the power if not then the dyno was giving HP out like it was candy.

I have seen up to 30 RWHP difference from one dyno to the next.

Remember a lot tuners will show hi dyno #'s to bring in the costumers $$$
I say show me the MPH.

Pete

Jagdpanzer · 10-03-2007

Quote:

Originally Posted by Pete

I say show me the MPH.

Hear Him!

Hack · 10-03-2007

I would probably be interested in the UD pulleys. Being new to ZR-1's a link to the site would be appreciated. Did a search of the 'net and came up empty. TIA

Z Factor · 10-03-2007

Quote:

Originally Posted by Hack

I would probably be interested in the UD pulleys. Being new to ZR-1's a link to the site would be appreciated. Did a search of the 'net and came up empty. TIA

Hello and welcome to the forum.

http://www.zr1products.com/index.html

10-03-2007

my UD pulleys just arrived before week.
i told randy to send my pulleys to South corvette product, and he did it fast just like when i ordered 160 theromstat .
i deal with South corvette and ordered many parts from them! realy good ppl to talk and make a deal with them. you can contact Keven or Darren , they are great men and saved me time!
i will post pictures of my pullys soon here!

10-01-2007	#21
902066 Join Date: Jul 2005 Posts: 190	Re: U.D. pulleys & 160 T-stat G.P. I would be interested in a T- stat if you can get a group purchase going.

10-01-2007	#22
1990 quasar blue Join Date: Feb 2004 Location: Ma Posts: 404	Re: U.D. pulleys & 160 T-stat G.P. I sent Randy an email tonight. I'll keep everyone posted. __________________ 1990 ZR1 #2574 Medium Quasar Blue Metallic 1 of 19

10-03-2007	#23
Greybeard ZR1 Join Date: Jun 2005 Posts: 14	Re: U.D. pulleys & 160 T-stat G.P. Those dyno numbers on the company website should be highly suspect. Randy's magic 405 hp. LT5 now makes 482 hp. (482-15%=409.7rwhp.), with the addition of headers and exhaust, a lightweight flywheel, some coolant parts, underdrive pulleys, and a dyno tune. yeah...right. Guys, people have been tweaking the LT5 for more than 15 years now, and nobody has gotten numbers like that. Not without getting out the old grinder and hogging out the intake flow. He claims to be getting nearly 460 hp. by just slapping on headers, exhaust, chip, and that magic 160 deg. thermostat. How many of you already have that equipment on your car? I do. Is anyone getting 460 hp.?... c'mon, let's get real. I applaud his "Project Objectives" - "Obtain maximum horsepower from a stock LT5 utilizing true "bolt-on" performance parts, and without any porting or internal engine modifications." It's just that I don't buy the posted results. Perhaps they should take that garage queen 5K mi. 95' out to the local dragstrip and post some trap times to back up all the horsepower it supposedly has? P.S.-Back in the last century, when I bought my 160 deg. stat from A.O. Engineering, it was $35. And I thought that was a ripoff. Has anyone asked Randy why these are so expensive? __________________ 91' ZR1 #1236

10-03-2007	#24
jonszr1 Join Date: Sep 2006 Location: lone pine and mammoth lakes Posts: 1,407	Re: U.D. pulleys & 160 T-stat G.P. If i may take a moment . i find the hostility of the previous post, unkind at best. why do people have to be so agressive . why cant they just ask nice. I have done business with randy and find him to be a honest person that delivers what he says and his products first rate . so much so i ordered another thermastate for my red car . why not just pm him and ask for his results. or better yet take the time and give him acall instead of (in my opnion )disrespecting him in a public forum . if the previous has been done then sure post your results of the call or pm . why take the chance of hurting a mans rep without doing some homework . jmho

10-03-2007	#25
Greybeard ZR1 Join Date: Jun 2005 Posts: 14	Re: U.D. pulleys & 160 T-stat G.P. I'm sorry, I didn't wish to be hostile, or unkind. And I certainly don't want to hurt anyone's feelings. And I don't really need to PM him to ask for his results, they're posted on his website. It's the posted results that I questioned. The results seem to be out of line with the results achieved by numerous tuners that have worked on the LT5 for the past 15 years or so. Do you think John Lingenfelter, or Doug Rippie would go to the trouble of porting the plenum, injector housings, and heads of the ZR1, if all they had to do was install underdrive pulleys, a thermostat, gaskets, and exhaust on it to get 475+ hp.? For a more thorough look at what it takes to increase the output of an LT5, i refer you to this presentation by respected long time LT5 tuner Marc Haibeck: http://www.zr1specialist.com/HAT%20W...%20Paths1b.pdf Perhaps if Randy's parts have worked their magic on your car, you can share the results with us? dyno numbers? seat of the pants? __________________ 91' ZR1 #1236

10-03-2007	#26
Pete Join Date: Dec 2003 Location: Chicagoland,IL Posts: 2,679	Re: U.D. pulleys & 160 T-stat G.P. Guys a dyno is a tuning device. Some show hi some show low. About Randy's Z either the car is a freako or the dyno was a freako. I really don't think Randy is BSing. I would think the Dyno could be BSing. If the car runs 118-120 then it's making the power if not then the dyno was giving HP out like it was candy. I have seen up to 30 RWHP difference from one dyno to the next. Remember a lot tuners will show hi dyno #'s to bring in the costumers $$$ I say show me the MPH. Pete __________________ '91 #1635 PoloGreen 350 LT5 11.09 @ 129.27 11.04 @ 128.86 474RWHP 400RWTQ http://www.youtube.com/watch?v=SFNFOhGGlR4 http://www.youtube.com/watch?v=ZlRIOMwaDYY https://sites.google.com/site/peteszr1garage

10-03-2007	#28
Hack Join Date: Sep 2007 Location: Port Orchard Posts: 14	Re: U.D. pulleys & 160 T-stat G.P. I would probably be interested in the UD pulleys. Being new to ZR-1's a link to the site would be appreciated. Did a search of the 'net and came up empty. TIA

10-03-2007	#30
HADI-ZR1 Guest Posts: n/a	Re: U.D. pulleys & 160 T-stat G.P. my UD pulleys just arrived before week. i told randy to send my pulleys to South corvette product, and he did it fast just like when i ordered 160 theromstat . i deal with South corvette and ordered many parts from them! realy good ppl to talk and make a deal with them. you can contact Keven or Darren , they are great men and saved me time! i will post pictures of my pullys soon here! Last edited by HADI-ZR1; 10-03-2007 at 07:36 PM.