UNder Drive pullys ( I know I know)
Burning Brakes
Joined: May 2009
Posts: 1,014
Likes: 7
From: Ft Wayne IN
So 10% loss.... and how much will the underdrive save on the LT1? .. thats what I thought. If the underdrives cost 250 plus install: are you saying that is the best way to spend the $250+ labor?
Is that your best advice for the money ...? Really Now !!????
If you can purchase an electric water pump for $200 ... now how do you like the underdrives on an LT1.
We are talking LT1.... Right?
Is that your best advice for the money ...? Really Now !!????
If you can purchase an electric water pump for $200 ... now how do you like the underdrives on an LT1.
We are talking LT1.... Right?
Bottom line is sure "technically" there is "some" hp to be gained unfortunately on your motor it will be minimal and in my opinion not worth the voltage loss and trust me your fuel pump will lose psi your headlights will be dimmer at night your wipers will run slower when needed and so on. I can't tell you how much better that EWP would benefit you hands down a win win. Don't buy for one second they only benefit 1,000 hp motors. Bottom line is it's your money and you will do with it what you want. We are all just giving input and it's your job to figure out what makes sense for you and your application. Just remember that all the claims on the Internet site selling there product is aimed solely at enticing you into buying there product so take it at face value. good luck.
Last edited by C4vettrn; Feb 12, 2011 at 10:10 PM.
Instructor
Joined: Nov 2003
Posts: 129
Likes: 0
From: Ringgold GA
I do not know if the underdrive sets would benefit an LT1 or if it may cause any problems, My car is an 87 L98 TPI. I can tell you I installed the March 3 piece pulley kit on my car 6 or 7 years ago and have not had any problems with or from them in any way and they still look great, the finish has held up beautifully.
Best of luck with your decision and if you do decide to try them post back and let everyone know how they worked out for you on the LT1.
Best of luck with your decision and if you do decide to try them post back and let everyone know how they worked out for you on the LT1.
Race Director
Joined: Jan 2002
Posts: 12,263
Likes: 86
From: O'Fallon Missouri
Drifting
Joined: Aug 2000
Posts: 1,614
Likes: 0
From: Colleyville Texas
Thread Starter
Melting Slicks
Joined: Jul 2006
Posts: 2,151
Likes: 0
From: Strongsville Ohio
I am on the fence here guys.
Only problem, if I choose not to do the pullys now, then once I get my car started, I have to drive it to get tuned ASAP. So I would loose out on them being able to adjust my idle as in the original price I pre-paid to tune it for the cam.
If I do the pullys now, I can have them adjust my idle with the tune for the cam.
I just put in a new water pump last fall so I'd hate to spend even more money on another one
Only problem, if I choose not to do the pullys now, then once I get my car started, I have to drive it to get tuned ASAP. So I would loose out on them being able to adjust my idle as in the original price I pre-paid to tune it for the cam.
If I do the pullys now, I can have them adjust my idle with the tune for the cam.
I just put in a new water pump last fall so I'd hate to spend even more money on another one
Le Mans Master
Joined: Mar 2001
Posts: 7,999
Likes: 14
From: Life is just one big track event. Everything before and after is prep and warm-up and cool-down laps
Cruise-In III Veteran
Cruise-In IV Veteran
St. Jude Donor '12
IIRC the under drive pullies will only net you 3whp maybe
On my race car I'm just going to underdrive the power steering pump and see if I can finagle the electric water pump in next years budget.
On my race car I'm just going to underdrive the power steering pump and see if I can finagle the electric water pump in next years budget.
Tech Contributor
Joined: Oct 2008
Posts: 3,729
Likes: 190
From: Custer, WI
March does make their Amp & Performance line that comes with a smaller alternator pulley you swap out with your current one to make sure you get the correct charge at idle..i installed them on my 85 shortly before it blew up. Its a 2 piece set, bought it from summit for around 90 dollars
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