SB EXHAUST MANIFOLDS

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WAYNE0

WAYNE0

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This question has probaly been asked many times. Has anyone done a flow test on all small block exhaust manifolds ? How bad are they compared to headers, which years is the best ? Is there a way to increase the flow ?
 
the early 340 manifolds are the best ones out there. you can have them extrude honed but talking with a F.A.S.T class guy years ago he said that it made no difference. long tube headers will make more power

68-70 manifold part numbers.
#2863549
#2863553
 
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I think its more about what camshaft your using I've see dyno results showing only a 10 hp difference on a stock 340. And 25HP on a all out engine with 1 3\4 in tubes.
 
I have a 397 ci. 360 witha supercharger 8.5 com. Not sure on cam size. It wouldnt take much to talk me into exhaust manifolds lol I have TTIs long tub on right now. Yea TTIs are better than most but im not impressed. Does anyone make a good shorty header for small block ? I put a pair of shumacher shorties on a big block A body already & i was impressed.
 
WAYNE0 said:
I have a 397 ci. 360 witha supercharger 8.5 com. Not sure on cam size. It wouldnt take much to talk me into exhaust manifolds lol I have TTIs long tub on right now. Yea TTIs are better than most but im not impressed. Does anyone make a good shorty header for small block ? I put a pair of shumacher shorties on a big block A body already & i was impressed.
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I would go headers with an engine like that. You are forcing a lot more air in. You have to get it out fast. LOL
 
WAYNE0 said:
I have a 397 ci. 360 witha supercharger 8.5 com. Not sure on cam size. It wouldnt take much to talk me into exhaust manifolds lol I have TTIs long tub on right now. Yea TTIs are better than most but im not impressed. Does anyone make a good shorty header for small block ? I put a pair of shumacher shorties on a big block A body already & i was impressed.
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what don't you like about the tti? had a set and loved them. went 340 manifolds on the latest car and will not be doing that again. pain in the ***. the tti were much easier in my opinion.
 
abodyjoe said:
what don't you like about the tti? had a set and loved them. went 340 manifolds on the latest car and will not be doing that again. pain in the ***. the tti were much easier in my opinion.
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Can only guess it was the price he wasn’t impressed with?? In most cases one gets what they paid for. Want a good pair of headers? TTI is usually at the top of most people’s wish lists based on performance, looks, fitment and quality. They are not a low priced item though.
 
H22A4 said:
Can only guess it was the price he wasn’t impressed with?? In most cases one gets what they paid for. Want a good pair of headers? TTI is usually at the top of most people’s wish lists based on performance, looks, fitment and quality. They are not a low priced item though.
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I don't know the application here but Dougs are supposed to be good and more reasonably priced.
 
toolmanmike said:
I don't know the application here but Dougs are supposed to be good and more reasonably priced.
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they are cheaper. still pricey though.

I'd go tti only because our dart has full tti exhaust to from the manifolds back. be an easier route for me.
 
abodyjoe said:
what don't you like about the tti? had a set and loved them. went 340 manifolds on the latest car and will not be doing that again. pain in the ***. the tti were much easier in my opinion.
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i got lucky and found a really nice pair a Carlisle the other year. I liked the price, the quaility but the fitment mmm For what they cost i think they should fit better Thats just me
 
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