Downpipe or Swain coating
#1
Racer
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Join Date: Dec 2008
Location: brunswick md
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Downpipe or Swain coating
So I'm putting together the top end of my 88 after replacing headgasket and having the turbo rebuilt. According to my wife's budgetary guidelines, I can either have my headers (factory, in great shape) and crossover Swain coated, or I can buy the Fabspeed downpipe. The turbo is a 26/8 with a #6 hotside, so pretty stock, and that's the way I anticipate it staying.
I'm looking for best bang for the buck. Any thoughts?
I'm looking for best bang for the buck. Any thoughts?
#5
Three Wheelin'
You already have the car apart? If so I'd go with the coated headers and x-over as that is more work than swapping a downpipe later on. You don't really need a larger DP on a #6 exhaust side, that turbine is tiny and 2.5" is "enough" for it. Not saying you wouldn't see any gains from it, you would, just not as much as if you had a #8, #10, T3, T4, etc. hotside.
#6
Pro
I considered a bigger downpipe but found that with my stock 26/6 it didn't make any sense.
I'd contact SFR and ask them if it would make much of a difference with a 26/8. Here's a quote from Tim@SFR at : https://rennlist.com/forums/924-931-...e-section.html
TURBOTIM: "The downpipe mounts to stock turbos but to be honest, there would probably be little gain installing one on a stock turbo."
Back to my comments: Bigger=less backpressure, but the SFR downpipe is much larger than the exit port of the your hot side. Too large means lots of turbulence in the downpipe which will not help! Theoretically, to minimize turbulence the exhaust should expand to 3" gradually, in steps. Right now, you sort of have that with your existing setup. If you plan on going with a bigger hot side (e.g. bigger turbo) in the near future, the downpipe would still make sense, but if not, it's probably not worth the money.
I'd contact SFR and ask them if it would make much of a difference with a 26/8. Here's a quote from Tim@SFR at : https://rennlist.com/forums/924-931-...e-section.html
TURBOTIM: "The downpipe mounts to stock turbos but to be honest, there would probably be little gain installing one on a stock turbo."
Back to my comments: Bigger=less backpressure, but the SFR downpipe is much larger than the exit port of the your hot side. Too large means lots of turbulence in the downpipe which will not help! Theoretically, to minimize turbulence the exhaust should expand to 3" gradually, in steps. Right now, you sort of have that with your existing setup. If you plan on going with a bigger hot side (e.g. bigger turbo) in the near future, the downpipe would still make sense, but if not, it's probably not worth the money.
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#9
#11
Rennlist Member
I would go with a JET HOT coating and save the money and then get a larger down-pipe, down the road ( no pun intended )
Regards
Ed
Regards
Ed
#13
Rennlist Member
If your asking about Jet Hot .. it runs about 15-20 dollars a foot
The best part is that you dont have to cut off the heat shields that are on the heater and the crossover .... and the next best part is that they look great
All the while ... keeping the heat in .... ( they may be a little less as efficient as
Swain when it comes to keeping the heat in but I am guessing it not that much ?)
I sure looks better
The best part is that you dont have to cut off the heat shields that are on the heater and the crossover .... and the next best part is that they look great
All the while ... keeping the heat in .... ( they may be a little less as efficient as
Swain when it comes to keeping the heat in but I am guessing it not that much ?)
I sure looks better
#15
Rennlist Member
That would have been a good idea ...
Instead I took the hard road, and polished it myself ... actually compared to the intake ... that cross-over was a walk in the park ....