View Poll Results: 1 3/4" Headers or 1 7/8" Headers ?
1 3/4" Headers
42
37.50%
1 7/8" Headers
70
62.50%
Voters: 112. You may not vote on this poll
1 3/4" Headers vs 1 7/8" Headers ?!?!?
10-08-2008, 12:47 PM
#1
Staging Lane
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1 3/4" Headers vs 1 7/8" Headers ?!?!? I have searched and read numerous threads and still havent been able to come up with a answer... on a 98 z28 A4 with basic mods for now (Throttlebody, Lid, Exhaust, ls6 manifold) should i go 1 3/4" headers or 1 7/8" headers (what will make those most power in other words)? if so which brand to go with ? i got $500 to spend and ill be doing a MS4 cam or something like it here in about 8 or 9 months along with a set of heads. So im going for a very aggresive DD setup.
10-08-2008, 02:44 PM
#6
Tech Resident
An MS4 is nothing close to what you need to warrant bigger primaries. Unless you're going stroker or FI/NO2, stick with the appropriate 1 3/4" headers. Putting larger diameter primaries on your car will just slow down exhaust velocity and create more drag on the exhaust cutting big power in the low/midrange RPM's.
10-08-2008, 03:02 PM
#7
We recently did a dyno comparison between some 1 3/4" Headers and our new 1 7/8". We found some great results supporting the 1 7/8 headers doing well. You should see basically the same pick up in power until about 4800 rpm where the 1 7/8 header starts to make more power. Here is the thread where we poste our results for that comparison.
https://ls1tech.com/forums/showthrea...ight=7/8+1+tsp
https://ls1tech.com/forums/showthrea...ight=7/8+1+tsp
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10-08-2008, 04:17 PM
#12
FYI - listen most to people who have some dyno feedback on both products
listen most to people that actually have the products you are looking at
don't listen to people who have neither.
10-08-2008, 04:22 PM
#14
Staging Lane
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Yeah im stuck between Pacesetters 1 3/4", Texas speeds 1 7/8", Eledbrocks 1 3/4" stepped to 1 7/8" or LLP's Stainless steel headers...
10-08-2008, 09:04 PM
#15
An MS4 is nothing close to what you need to warrant bigger primaries. Unless you're going stroker or FI/NO2, stick with the appropriate 1 3/4" headers. Putting larger diameter primaries on your car will just slow down exhaust velocity and create more drag on the exhaust cutting big power in the low/midrange RPM's.
He can't resist a header thread anymore than a crackhead can a rock At least he didn't QTP
this time He is the Patrick G of headers
im going to be ordering this friday or saturday so i need to make up my mind soon 
10-08-2008, 10:28 PM
#17
Tech Resident
10-09-2008, 12:14 AM
#18
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We all understand 1 3/4 headers are "optimal" for a h/c/i/ 346 set up. There is way more important things to a combo in my opinion than if you run 1 3/4 or 1 7/8 headers. We are talking minimal differences. A cam on the other hand can make or break a car but picking between 1 3/4 or 1 7/8 is not going to. If you dont plan on going bigger buy 1 3/4 if you want room and have plans to grow buy 1 7/8. Thats just my .02
11-02-2008, 07:40 PM
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+1 with that kind of budget your really limited on which headers are best but the TSP 1 7/8 wouldnt be a bad choice to look at