1997 a4 cam help??
Thread Starter
Intermediate
Joined: Dec 2014
Posts: 32
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From: Minnesota
1997 a4 cam help??
done tons of research and still drawing a blank!!! I want a choppy lumpy idle as possible. I have stock convertor, xs power headers, borla straights, ported throttle body, z06 intake manifold, msd wires, cai, and a tune... what will give me great hp with lumpy idle with my stock convertor? I have been looking at thumpr comp cam 275thr7 219/233 109 ??? any thoughts? 
Safety Car
Joined: Mar 2005
Posts: 3,753
Likes: 1,212
From: Wisconsin
In a word no, with that lsa109 that would really "thump" those thumper series cams have the sound at idle you're looking for BUT they have terrible driveablity. I would look for a cam with a lsa of 114 or 116
Last edited by feeder82; Feb 13, 2016 at 12:12 PM.
Le Mans Master
Joined: Aug 2005
Posts: 5,375
Likes: 328
From: CA.
St. Jude Donor '13-'14-'15
A choppy lopey idle is created by lowering the LSA of the cam or by having a huge split between the duration from intake and exhaust---Either way these cams require a much higher idle speed than stock --This is why people always install some sort of stall converter as with the stock converter at required higher idle speeds you won't be able to hold it still at a stop light and it will become no fun to drive----
I believe your car has about a 117 LSA STOCK----You can go to no lower than a 114 and maybe still use the stock converter as long as you keep both durations at .050 at about a max .225----You will have a noticeable lope but nothing like a cam with a 110 or 112 LSA---
I believe your car has about a 117 LSA STOCK----You can go to no lower than a 114 and maybe still use the stock converter as long as you keep both durations at .050 at about a max .225----You will have a noticeable lope but nothing like a cam with a 110 or 112 LSA---
