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Flippin through my newest Summit Racing book today and came across Trick Flow UDP...crank and alt for 209.95! The crank pulley is 25% underdriven and the alternator pulley is an overdrive to keep voltage up. They aren't on the site yet, but the PN is #TFS-18012. They sound like a good deal to me since you get both. What kinda gains do you guys get with UDP's?
Damn right! That is an AWESOME price too! I really liked the power increase of my truck after I got them on. Best bang-for-the-buck mod out there...
I cant find the pulleys. I even looked on trick flows website.
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Originally Posted by Warlock2007
:DQuote:
Originally Posted by 1_fastsilverado
warlock2007, your best bet would probably be to go on the summitracing.com site and order a magazine, or their # is 1-800-230-3030 call them up and see what they say. When I get money next week I'm orderin a set for sure!
Go to WS6store.com and the ASP, powerbond and SLP 25% underdriven are only $188.
Just no alt overdrive pulley. Cold weather for me I want my alt to turn its normal speed.Quote:
Originally Posted by 98aggie
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Originally Posted by mnc2fan
They have one that includes the Alt pulley.
I thought he ment summits site. lolQuote:
Originally Posted by txarkitekt
I acctually just got my new summit in the mail today.Quote:
Originally Posted by 1_fastsilverado
It's the cover with the silver camaro I think....go to the truck section in the back and it's a few pages in on the lower left page. They look good to me, but I have only seen that picture of them.
LS1 car accessories have a different offset than the truck accessories.Quote:
Originally Posted by 98aggie
I looked on their site . . . are they selling truck stuff now?
Yeah. I ordered my 160 T-stat from them. The WS6store.com has good prices and fast shipping.
SLP Balancer/Underdrive Pulley, 1999-08 4.8/5.3/6.0 Silverado/Sierra/SUV, 2006-07 Trailblazer SS 100230 By SLP Performance Parts, GM Truck/SUV 1996 - 08 cheapest i've found. Ordering mine friday :)
I like the slp b/c it comes with a new bolt, and addresses false knock. A lot of f-body guys had a prob with other balancers, slp was first to address it.
I hate u/d pullies.
$200+ for 10hp is not worth it to me.
and under-volt problems at idle always sucked.
Never had volt problems with mine w/ stock alt pully and idel problem is in the tune :)
people spend 200 for intake/exhaust and prolly get less of a gain.
The .5mpg i'll save in gas is worth it alone.
Have you installed one on an LS motor? Sorry you had bad experiences with them on Ford motors....or whichever motor it was. But I would highly recommend them to people who have LS motors.Quote:
Originally Posted by r.barn
im thinking about gettin sum which should i go for lol ill wait 2 c if anyone buys these n trys them out first
I knocked off .2 tenths when I installed mine, that was one friday to the next on the track outings...Definately worth it IMO I only did the UD pulley, Alt is stock and I don't have any charging issues.
I just got mine they are sitting n the the garage floor. I just need some time to put them on.Quote:
Originally Posted by chuyr
I'm glad to see this thread up again, I still want to buy a set, but wanted to read some feedback first.
Tyler and Jon, what brand did you guys use? Thanks.
You can really gain as much as 10hp just from and underdrive??
Yes you can. I have searched online dyno results and i think hot rod did an article about it. 10 hp to the wheels. Pretty impressive. i did the search a while ago so idk if i can find it again.
Thats outstanding! Well theres another item to my build list lol
slp has dyno sheets online. They show a stock 6.0, it gained like 8 or something. Since most of our motors are not stock, 10 is about right.
Mike--I purchased the ASP pulleys. I have had them for years and they are great. I got the UD harmonic balancer and the UD alt pulley. At idle, my alt charges a few volts higher than stock. Never had a charging issue, even running my efans and amp + subs...
I just have the powerbond crank pulley, alt pulley is still stock. I have a system and compressors for Air ride also and haven't had any charging issues.
Both your crank and alt pulleys are UD? I had always thought it was supposed to be UD for the crank and OD for the alt? Maybe I just misread or misunderstood before. :oQuote:
Originally Posted by txarkitekt
Its a tough concept Travis, but if you UD the crank pulley by 25%, then the stock alt pulley will move 25% slower. If you match the 25% UD crank with a 23% UD alt, it will spin about the same RPMs as before. I get full charge of the alt at just 750 rpms...
Ah I see. It makes perfect sense. Just was going off what I heard you know. What did you pay for your set?
Why are you ALWAYS thinking about men?????Quote:
Originally Posted by bangbangskeetskeet
I got mine for $220 plus $20 for the belt.
Stupid iPhone likes to change words on me from time to time. :(Quote:
Originally Posted by txarkitekt
Where did you pick them up from?
not to get too technical but it would be:Quote:
Originally Posted by txarkitekt
an overdrive if its a smaller driven or a larger drive
an underdrive if its larger driven or a smaller drive
drive is crank
driven is wp/ps/alt
you have an underdrive crank pulley, and an overdrive alt pulley
i think
my head hurts
Oh, they work well on F*** too, in my experience. I have the March aluminum 3-piece set on my Mustang (crank, water pump, alt), right when they introduced the Power & Amp series to correct low idle voltage (which it evidently did, never had a problem). I'm guessing I've had them on my car since '97 or so.Quote:
Originally Posted by txarkitekt