Whipple & Steeda UDPs / GT500 pumps
07-23-2009, 01:01 PM
#1
3rd Gear Member
Thread Starter
Join Date: Jan 2008
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Posts: 530
Whipple & Steeda UDPs / GT500 pumps
My car had steeda UDPs installed when I bought the car, and now I have a FRPP whipple sitting in a box ready to go. The whipple comes with a 3.375 pulley good for 10-11 psi. Frankly, that level of boost on a stock engine seems foolish to me, it will go sooner or later.
I'm aware than the smaller diameter crank pulley will decrease boost, and that is exactly what I want. Keeping the UDPs will save me the labour of swapping and the expense of a new pulley.
Getting to the question, other than decreasing boost, are there other negative effects from continuing to run the UDPs?
Will I need a different belt (I have a 124.7)?
Do you know the approximate boost reduction with such a scenario?
Anybody running this setup?
Second question.......
I'm going to have to delay the supercharger installation for a couple months. Can I install the GT500 pumps in advance of the supercharger to get a leg up on the installation process or will this cause problems?
I'm aware than the smaller diameter crank pulley will decrease boost, and that is exactly what I want. Keeping the UDPs will save me the labour of swapping and the expense of a new pulley.
Getting to the question, other than decreasing boost, are there other negative effects from continuing to run the UDPs?
Will I need a different belt (I have a 124.7)?
Do you know the approximate boost reduction with such a scenario?
Anybody running this setup?
Second question.......
I'm going to have to delay the supercharger installation for a couple months. Can I install the GT500 pumps in advance of the supercharger to get a leg up on the installation process or will this cause problems?
07-23-2009, 01:47 PM
#2
6th Gear Member
Join Date: May 2006
Location: Nicely done
Posts: 11,881
i see your dilema, on one hand you probably
would prefer to install the whipple with the
vehicle in the correct state, but on the other
it would be costly to remove the UDP kit and
you're not even sure it would have any benefit
in the end.
i would just say go with your gut instincts.
it'll probably run just fine, you'll probably need the next
smaller belt and yes you could install the pump kit ahead of time.
not sure how much psi will be reduced by the UDP,
maybe 1 - 1.5
good luck and follow up when you finally do get to
install the whipple.
would prefer to install the whipple with the
vehicle in the correct state, but on the other
it would be costly to remove the UDP kit and
you're not even sure it would have any benefit
in the end.
i would just say go with your gut instincts.
it'll probably run just fine, you'll probably need the next
smaller belt and yes you could install the pump kit ahead of time.
not sure how much psi will be reduced by the UDP,
maybe 1 - 1.5
good luck and follow up when you finally do get to
install the whipple.
07-24-2009, 02:29 AM
#3
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Join Date: Nov 2006
Location: Detroit Rock City!
Posts: 15,618
I thought the Whipple and the Steeda UDP's were not compatible (any UDP's) and if Mark (chevykiller) was around he could answer that for sure. I swear I read something like that somewhere and thought it was in one of Marks threads.
anyone else?......and I have been running 11 psi now for almost 2 yrs and no issues....timing adv is max of 19 degrees. I have the GT500 pumps and 60# injectors. You can install the pumps anytime you want...it will only help.
Reading a thread the other day on a S/C'd S197 that gained quite a of HP after the GT500 pumps proving that maxing out the stock pump is like living on borrowed time (similar to high boost applications on a non- forged motor)
anyone else?......and I have been running 11 psi now for almost 2 yrs and no issues....timing adv is max of 19 degrees. I have the GT500 pumps and 60# injectors. You can install the pumps anytime you want...it will only help.
Reading a thread the other day on a S/C'd S197 that gained quite a of HP after the GT500 pumps proving that maxing out the stock pump is like living on borrowed time (similar to high boost applications on a non- forged motor)
Last edited by mygt500; 07-24-2009 at 02:34 AM.
07-24-2009, 08:37 PM
#4
4th Gear Member
Join Date: Apr 2007
Location: So Cal
Posts: 1,323
I thought the Whipple and the Steeda UDP's were not compatible (any UDP's) and if Mark (chevykiller) was around he could answer that for sure. I swear I read something like that somewhere and thought it was in one of Marks threads.
anyone else?......and I have been running 11 psi now for almost 2 yrs and no issues....timing adv is max of 19 degrees. I have the GT500 pumps and 60# injectors. You can install the pumps anytime you want...it will only help.
Reading a thread the other day on a S/C'd S197 that gained quite a of HP after the GT500 pumps proving that maxing out the stock pump is like living on borrowed time (similar to high boost applications on a non- forged motor)
anyone else?......and I have been running 11 psi now for almost 2 yrs and no issues....timing adv is max of 19 degrees. I have the GT500 pumps and 60# injectors. You can install the pumps anytime you want...it will only help.
Reading a thread the other day on a S/C'd S197 that gained quite a of HP after the GT500 pumps proving that maxing out the stock pump is like living on borrowed time (similar to high boost applications on a non- forged motor)
10 to 11 ibs is not foolish. Mygt500, Hammeron, many others and I have been running this psi for years now with no problems..... From what I have experienced and what I have seen throughout the years, you will be fine with 10-11.
07-25-2009, 06:11 AM
#5
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Join Date: Dec 2008
Location: New Jersey
Posts: 67
THis is the link I have found on whipple pulleys: http://www.lethalperformance.com/05-...pulley-p-15041
By the way, it shows the smaller the pulley the higher the boost. I have the 3.25 for 11 PSI. I am not worried about the 11PSI boost. I am not racing the car and I have only put on it on the dyno once, and won't do it again. I am actually a bit more concerned about the belt. I am starting to see rubber dust inside the pulley, which indicates some slippage. I don't hear it yet, so it must be moderate, but there is only so much rubber to give before the belt snapps. Any advice on a replacement belt?
By the way, it shows the smaller the pulley the higher the boost. I have the 3.25 for 11 PSI. I am not worried about the 11PSI boost. I am not racing the car and I have only put on it on the dyno once, and won't do it again. I am actually a bit more concerned about the belt. I am starting to see rubber dust inside the pulley, which indicates some slippage. I don't hear it yet, so it must be moderate, but there is only so much rubber to give before the belt snapps. Any advice on a replacement belt?
07-25-2009, 08:42 AM
#6
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Location: Detroit Rock City!
Posts: 15,618
THis is the link I have found on whipple pulleys: http://www.lethalperformance.com/05-...pulley-p-15041
By the way, it shows the smaller the pulley the higher the boost. I have the 3.25 for 11 PSI. I am not worried about the 11PSI boost. I am not racing the car and I have only put on it on the dyno once, and won't do it again. I am actually a bit more concerned about the belt. I am starting to see rubber dust inside the pulley, which indicates some slippage. I don't hear it yet, so it must be moderate, but there is only so much rubber to give before the belt snapps. Any advice on a replacement belt?
By the way, it shows the smaller the pulley the higher the boost. I have the 3.25 for 11 PSI. I am not worried about the 11PSI boost. I am not racing the car and I have only put on it on the dyno once, and won't do it again. I am actually a bit more concerned about the belt. I am starting to see rubber dust inside the pulley, which indicates some slippage. I don't hear it yet, so it must be moderate, but there is only so much rubber to give before the belt snapps. Any advice on a replacement belt?
if you go to an 8 rib belt/pulley system that will solve the belt slip or if you have mad cash you can get the Steeda Whipple belt drive (1200 bucks) and you will have no slip and a 10 rib setup. Steeda is sponsor on this forum too.
http://www.steeda.com/videos/product...belt-drive.php
Check your tensioner and make sure its not bent (even the slightest bend can cause belt failure over time)
So sometimes getting a new tensioner will help too.
this link is from one of Hammeron's posts
https://mustangforums.com/forum/5854362-post2.html
part of this thread
https://mustangforums.com/forum/4-6l...1247-belt.html
found this on another forum
Its a 6 rib 124.75" belt. You can run what brand you like. I prefer Gates. Gates sizes are for example a K061247 is a KO= Gates regular belt 06= ribs and 124+inches of length and 7= fractions of inches. A K121102 is a 12 rib 110.25" belt.
found a online store that sells them
http://www.bluecollarperformance.com/k061247.html
last but not the least......joe heck racing can and will order them for you (great company as I got a great deal on the chrome valve covers from them)
Ok. I have found one local source of these belts. Joe Heck Racing can and has ordered them. As of today he still may have a few in stock. (one is on its way to me)
They are about half the price that whipple is asking and most certainly less shipping. Joe Heck price is $49.95 plus shipping.
I am also investigating another source that may be even cheaper and when I find out if what they are selling is what we need for the whipple blowers I will post up.
They are about half the price that whipple is asking and most certainly less shipping. Joe Heck price is $49.95 plus shipping.
I am also investigating another source that may be even cheaper and when I find out if what they are selling is what we need for the whipple blowers I will post up.
07-25-2009, 09:25 AM
#7
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Join Date: Dec 2008
Location: New Jersey
Posts: 67
Joe Heck racing is the company I picked to install the Whipple HO and the FRPP handling kit. They indeed have good prices and their mechanic is one experienced and detailed oriented guy!. Everything worked perfectly from day one. I'll check with them on the pulley/belt. Thanks for the information.
07-27-2009, 08:31 AM
#9
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Join Date: Jul 2006
Location: New Orleans
Posts: 4,491
My car peaks at 10.9psi and has been running fine for over a year. These blocks are much more stout than they get credit for. I'd swith the pullies back to stock or spring for a custom tune. Otherwise, I'd imagine that you'd be running ridiculously rich as the whipple tune is already fairly conservative.
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