Author Topic: Equal length manifolds  (Read 1073 times)

jimmy_b

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Equal length manifolds
« on: 23:25, Thu 23 July 2009 »
what are the pro's and con's of these manifolds?

the spec of my engine will be fully rebuilt, new pistons and liners (std compression), piper 284 cam, vernier, VNT turbo (20psi on high boost).

would i benifit from a k-tec manifold?

cheers

james

DanielSon-gtt

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« Reply #1 on: 23:50, Thu 23 July 2009 »
tubalurs are more free flowing mate if you have a standard its well worth replacing
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jimmy_b

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« Reply #2 on: 23:56, Thu 23 July 2009 »
yeh atm i will be running a std manifold when the new engine goes in

r5matt

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« Reply #3 on: 00:30, Fri 24 July 2009 »
you can run easly 200bhp with a standerd manifold , My friends Fiesta RS runs 250 on a standerd escort manifold , they are beneficial , the flowed internals allow the gasses to flow But many people believe them to be a waste of money Not just ktec's version but others Ruhmer has it they tend to crack quickly and easily , Am yet to be convinced in parting with my cash for one....

jimmy_b

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« Reply #4 on: 00:39, Fri 24 July 2009 »
ive looked at the one in the for sale section but my mate has also offered to make me a custom one for alot cheaper. suppose its worth it to see if there is any diff

5teve L

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« Reply #5 on: 07:31, Fri 24 July 2009 »
There will be minimal gains for the amount spent, it's a bit like headwork really, of course there is gains but they are usually small. If you can get one done on the cheap then go for it, make sure they strngthen it near the collector where it joins the (heavy) turbo.
I ran a standard manifold & after dropping the forgies in I reckon I was close to 230bhp @ 24psi manifold, it would have made more but I was running out of fuel by then.

jimmy_b

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« Reply #6 on: 11:01, Fri 24 July 2009 »
i know the std manifold is crap design but it does flow ok. my bro (markeyturbo) is managing to get 217bhp and 256ft lbs from his with a std cam. i'll see what my mate can do and get some pics of the results.

does the bore size matter for the headers? bigger or smaller better?
im still used to n/a tuning where i had 1.75" headers into a 2.5" system on my old corsa xe

Rob@BYR

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« Reply #7 on: 21:47, Fri 24 July 2009 »
OK IMO.. the stock cast mani can flow 300hp, also equal lenght manis dont make much difference on a turbo car over an N/A... also my civic runs a cheap kung fui cast short mani, Prob worse than a GT and its around 450bhp...