???Underdrive Pulley Upgrade: Any Problems?
Thread Starter
Le Mans Master
Joined: Feb 2001
Posts: 5,381
Likes: 87
From: Houston TX
???Underdrive Pulley Upgrade: Any Problems?
-Has anybody experienced any problems/codes/side effects from the underdrive pulley upgrade???
-Will affect wear on my engine since I drive its my everyday driver???
-Is it really good for 8 to 10 HP at the rear wheels?????
-I have no engine mods but an aftermarket intake... should I do this MOD???
-If I do decided to do it... who should I buy the parts kit from??? :confused: :cheers:
-Will affect wear on my engine since I drive its my everyday driver???
-Is it really good for 8 to 10 HP at the rear wheels?????
-I have no engine mods but an aftermarket intake... should I do this MOD???
-If I do decided to do it... who should I buy the parts kit from??? :confused: :cheers:
Melting Slicks
Joined: Sep 1999
Posts: 2,521
Likes: 0
From: Houston, TX
Re: ???Underdrive Pulley Upgrade: Any Problems? (darkmercury)
I've had my MTI unit since 9.16.99 and no adverse effects...just a quicker revving engine and more power throughout the entire rev range. Click HERE for a look at the same day resulting gains of 8 Rwhp and 5.5 Rwtq on my stock LS1 that had a Donaldson and some tweaking as it's only mods.
Most people wait to do this mod with a cam change because the crank pulley has to be removed for that job. I didn't wait and am happy I did it before opening up the engine because it is a stealthy mod...very hard to see.
The install is not easy but shouldn't take more than a couple hours for an experienced mechanic. I'd see what you can get one installed for locally and then decide.
:cheers:
Most people wait to do this mod with a cam change because the crank pulley has to be removed for that job. I didn't wait and am happy I did it before opening up the engine because it is a stealthy mod...very hard to see.
The install is not easy but shouldn't take more than a couple hours for an experienced mechanic. I'd see what you can get one installed for locally and then decide.
:cheers:
Le Mans Master
Joined: Nov 2000
Posts: 7,391
Likes: 3
From: Chandler AZ
Re: ???Underdrive Pulley Upgrade: Any Problems? (darkmercury)
They are a great upgrade... and we usually suggest them when upgrading heads/cam because there is no additonal labor. However, if Supercharging is in your future they are not recommended :)
Le Mans Master
Joined: Nov 2000
Posts: 7,391
Likes: 3
From: Chandler AZ
Re: ???Underdrive Pulley Upgrade: Any Problems? (Buckmaster)
I agree with Buckmaster... suppose I should have clarified that we don't recommend them as a single upgrade because of the labor involved in swapping them in. Gains are minimal compared to cost...
:cheers:
:cheers:
Le Mans Master
Joined: Mar 2001
Posts: 5,741
Likes: 645
From: Lincoln, CA
Re: ???Underdrive Pulley Upgrade: Any Problems? (billreid1@***.net)
No problems or codes. It was ALOT of work to install so I wouldn't do it until its time for a Cam and timing chain upgrade.
Burning Brakes
Joined: Oct 2001
Posts: 770
Likes: 0
From: DYER IN
Re: ???Underdrive Pulley Upgrade: Any Problems? (ddawson)
Did anyone run into a problem with the battery staying charged?? especially if your sitting somewhere for a period of time or parked listening to music or anything i ran into alot of problems with my 2000 SS and i swore to myself I wouldnt ever do this stupid mod again.... A lot of work for no gain and more headaches down the line, im not sure if it is the same way in the vette though, just asking...
Melting Slicks
Joined: Sep 1999
Posts: 2,521
Likes: 0
From: Houston, TX
Re: ???Underdrive Pulley Upgrade: Any Problems? (BLUBYU2002C5)
I haven't had any charging problems at all. Did you have an aftermarket stereo or other electrical mods in your SS? The pulley diameters for both C5 and F-body are the same...only the neck length is different.
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Wait for the cam install... :yesnod:
Le Mans Master
Joined: Apr 2001
Posts: 5,331
Likes: 39
Re: ???Underdrive Pulley Upgrade: Any Problems? (darkmercury)
Just my opinon, but it's not that big a deal to pull the steering rack.
Yes it's a no brainer if you are pulley the radiator & steering rack for a cam install but I would do it for the 10 rwhp gain, probably more in torque.
I rate the pulley install to be about the same as installing LT headers (not counting any exhaust welding, etc.) Consider the cost of headers ($900-1200) for the 16 rwhp gain vs. 10 rwhp gain for the pulley ($250)
I say go for it! If you do, email me for some install tips.
Yes it's a no brainer if you are pulley the radiator & steering rack for a cam install but I would do it for the 10 rwhp gain, probably more in torque.
I rate the pulley install to be about the same as installing LT headers (not counting any exhaust welding, etc.) Consider the cost of headers ($900-1200) for the 16 rwhp gain vs. 10 rwhp gain for the pulley ($250)
I say go for it! If you do, email me for some install tips.
Burning Brakes
Joined: Oct 2001
Posts: 770
Likes: 0
From: DYER IN
Re: ???Underdrive Pulley Upgrade: Any Problems? (C5Cemo)
I haven't had any charging problems at all. Did you have an aftermarket stereo or other electrical mods in your SS? The pulley diameters for both C5 and F-body are the same...only the neck length is different.